Jet Power chips?
12-28-2003, 07:40 PM
#11
Guest
Posts: n/a
Re: Jet Power chips?
A larger throttle body *may* help at WOT. For normal driving, the PCM will
simply adapt to it the same way it adapts to vacuum leaks. It adds more fuel
and you gain no performance.
In message <wtIHb.30562$PK3.771@okepread01>, "DougW" wrote:
>BNB7 did pass the time by typing:
>> I was thinking about putting one of these chips in my '95 XJ. Does anyone have
>> any experience with these chips. Do they actually work? Do you think they're
>> worth couple hundred bucks or what could I buy for the same money that would
>> do the same thing?
>
>Save your money.
>
>Best first steps would be
>1) cat-back, gibson, borla, etc.
>2) new exhaust headers
>3) bored over throttle body.
>
>You don't give an engine size so be aware of this gotcha.
>If you have the 4 banger, the TB from a I6 is the largest you
>want to go. If you put a bored out TB for the I6 on your 4
>it will run so lean the engine will melt. :) Well, maby not
>that lean, but it will run like crap cause you essentially overtook
>the injectors.
simply adapt to it the same way it adapts to vacuum leaks. It adds more fuel
and you gain no performance.
In message <wtIHb.30562$PK3.771@okepread01>, "DougW" wrote:
>BNB7 did pass the time by typing:
>> I was thinking about putting one of these chips in my '95 XJ. Does anyone have
>> any experience with these chips. Do they actually work? Do you think they're
>> worth couple hundred bucks or what could I buy for the same money that would
>> do the same thing?
>
>Save your money.
>
>Best first steps would be
>1) cat-back, gibson, borla, etc.
>2) new exhaust headers
>3) bored over throttle body.
>
>You don't give an engine size so be aware of this gotcha.
>If you have the 4 banger, the TB from a I6 is the largest you
>want to go. If you put a bored out TB for the I6 on your 4
>it will run so lean the engine will melt. :) Well, maby not
>that lean, but it will run like crap cause you essentially overtook
>the injectors.
12-28-2003, 07:40 PM
#12
Guest
Posts: n/a
Re: Jet Power chips?
A larger throttle body *may* help at WOT. For normal driving, the PCM will
simply adapt to it the same way it adapts to vacuum leaks. It adds more fuel
and you gain no performance.
In message <wtIHb.30562$PK3.771@okepread01>, "DougW" wrote:
>BNB7 did pass the time by typing:
>> I was thinking about putting one of these chips in my '95 XJ. Does anyone have
>> any experience with these chips. Do they actually work? Do you think they're
>> worth couple hundred bucks or what could I buy for the same money that would
>> do the same thing?
>
>Save your money.
>
>Best first steps would be
>1) cat-back, gibson, borla, etc.
>2) new exhaust headers
>3) bored over throttle body.
>
>You don't give an engine size so be aware of this gotcha.
>If you have the 4 banger, the TB from a I6 is the largest you
>want to go. If you put a bored out TB for the I6 on your 4
>it will run so lean the engine will melt. :) Well, maby not
>that lean, but it will run like crap cause you essentially overtook
>the injectors.
simply adapt to it the same way it adapts to vacuum leaks. It adds more fuel
and you gain no performance.
In message <wtIHb.30562$PK3.771@okepread01>, "DougW" wrote:
>BNB7 did pass the time by typing:
>> I was thinking about putting one of these chips in my '95 XJ. Does anyone have
>> any experience with these chips. Do they actually work? Do you think they're
>> worth couple hundred bucks or what could I buy for the same money that would
>> do the same thing?
>
>Save your money.
>
>Best first steps would be
>1) cat-back, gibson, borla, etc.
>2) new exhaust headers
>3) bored over throttle body.
>
>You don't give an engine size so be aware of this gotcha.
>If you have the 4 banger, the TB from a I6 is the largest you
>want to go. If you put a bored out TB for the I6 on your 4
>it will run so lean the engine will melt. :) Well, maby not
>that lean, but it will run like crap cause you essentially overtook
>the injectors.
12-28-2003, 07:40 PM
#13
Guest
Posts: n/a
Re: Jet Power chips?
A larger throttle body *may* help at WOT. For normal driving, the PCM will
simply adapt to it the same way it adapts to vacuum leaks. It adds more fuel
and you gain no performance.
In message <wtIHb.30562$PK3.771@okepread01>, "DougW" wrote:
>BNB7 did pass the time by typing:
>> I was thinking about putting one of these chips in my '95 XJ. Does anyone have
>> any experience with these chips. Do they actually work? Do you think they're
>> worth couple hundred bucks or what could I buy for the same money that would
>> do the same thing?
>
>Save your money.
>
>Best first steps would be
>1) cat-back, gibson, borla, etc.
>2) new exhaust headers
>3) bored over throttle body.
>
>You don't give an engine size so be aware of this gotcha.
>If you have the 4 banger, the TB from a I6 is the largest you
>want to go. If you put a bored out TB for the I6 on your 4
>it will run so lean the engine will melt. :) Well, maby not
>that lean, but it will run like crap cause you essentially overtook
>the injectors.
simply adapt to it the same way it adapts to vacuum leaks. It adds more fuel
and you gain no performance.
In message <wtIHb.30562$PK3.771@okepread01>, "DougW" wrote:
>BNB7 did pass the time by typing:
>> I was thinking about putting one of these chips in my '95 XJ. Does anyone have
>> any experience with these chips. Do they actually work? Do you think they're
>> worth couple hundred bucks or what could I buy for the same money that would
>> do the same thing?
>
>Save your money.
>
>Best first steps would be
>1) cat-back, gibson, borla, etc.
>2) new exhaust headers
>3) bored over throttle body.
>
>You don't give an engine size so be aware of this gotcha.
>If you have the 4 banger, the TB from a I6 is the largest you
>want to go. If you put a bored out TB for the I6 on your 4
>it will run so lean the engine will melt. :) Well, maby not
>that lean, but it will run like crap cause you essentially overtook
>the injectors.
12-28-2003, 07:57 PM
#14
Guest
Posts: n/a
Re: Jet Power chips?
bllsht did pass the time by typing:
> A larger throttle body *may* help at WOT. For normal driving, the PCM will
> simply adapt to it the same way it adapts to vacuum leaks. It adds more fuel
> and you gain no performance.
Actually it changes the whole power curve, not just the top end with
the net result being the engine can breathe easier at higher revs.
By itself you might be looking at 2-3HP gain, the benefit comes when
your moving more air like I do with the supercharger.
Within limits anything that lowers intake and exhaust resistance improves
efficiency. I say "within limits" because resistance is necessary for the
engine to scavenge properly. Most modern engines use the O2 sensor to
set the mix, with the TPS acting as a sanity check and WOT signal.
> "DougW" wrote:
>
>> BNB7 did pass the time by typing:
>>> I was thinking about putting one of these chips in my '95 XJ. Does anyone
>>> have any experience with these chips. Do they actually work? Do you think
>>> they're worth couple hundred bucks or what could I buy for the same money
>>> that would do the same thing?
>>
>> Save your money.
>>
>> Best first steps would be
>> 1) cat-back, gibson, borla, etc.
>> 2) new exhaust headers
>> 3) bored over throttle body.
>>
>> You don't give an engine size so be aware of this gotcha.
>> If you have the 4 banger, the TB from a I6 is the largest you
>> want to go. If you put a bored out TB for the I6 on your 4
>> it will run so lean the engine will melt. :) Well, maby not
>> that lean, but it will run like crap cause you essentially overtook
>> the injectors.
> A larger throttle body *may* help at WOT. For normal driving, the PCM will
> simply adapt to it the same way it adapts to vacuum leaks. It adds more fuel
> and you gain no performance.
Actually it changes the whole power curve, not just the top end with
the net result being the engine can breathe easier at higher revs.
By itself you might be looking at 2-3HP gain, the benefit comes when
your moving more air like I do with the supercharger.
Within limits anything that lowers intake and exhaust resistance improves
efficiency. I say "within limits" because resistance is necessary for the
engine to scavenge properly. Most modern engines use the O2 sensor to
set the mix, with the TPS acting as a sanity check and WOT signal.
> "DougW" wrote:
>
>> BNB7 did pass the time by typing:
>>> I was thinking about putting one of these chips in my '95 XJ. Does anyone
>>> have any experience with these chips. Do they actually work? Do you think
>>> they're worth couple hundred bucks or what could I buy for the same money
>>> that would do the same thing?
>>
>> Save your money.
>>
>> Best first steps would be
>> 1) cat-back, gibson, borla, etc.
>> 2) new exhaust headers
>> 3) bored over throttle body.
>>
>> You don't give an engine size so be aware of this gotcha.
>> If you have the 4 banger, the TB from a I6 is the largest you
>> want to go. If you put a bored out TB for the I6 on your 4
>> it will run so lean the engine will melt. :) Well, maby not
>> that lean, but it will run like crap cause you essentially overtook
>> the injectors.
12-28-2003, 07:57 PM
#15
Guest
Posts: n/a
Re: Jet Power chips?
bllsht did pass the time by typing:
> A larger throttle body *may* help at WOT. For normal driving, the PCM will
> simply adapt to it the same way it adapts to vacuum leaks. It adds more fuel
> and you gain no performance.
Actually it changes the whole power curve, not just the top end with
the net result being the engine can breathe easier at higher revs.
By itself you might be looking at 2-3HP gain, the benefit comes when
your moving more air like I do with the supercharger.
Within limits anything that lowers intake and exhaust resistance improves
efficiency. I say "within limits" because resistance is necessary for the
engine to scavenge properly. Most modern engines use the O2 sensor to
set the mix, with the TPS acting as a sanity check and WOT signal.
> "DougW" wrote:
>
>> BNB7 did pass the time by typing:
>>> I was thinking about putting one of these chips in my '95 XJ. Does anyone
>>> have any experience with these chips. Do they actually work? Do you think
>>> they're worth couple hundred bucks or what could I buy for the same money
>>> that would do the same thing?
>>
>> Save your money.
>>
>> Best first steps would be
>> 1) cat-back, gibson, borla, etc.
>> 2) new exhaust headers
>> 3) bored over throttle body.
>>
>> You don't give an engine size so be aware of this gotcha.
>> If you have the 4 banger, the TB from a I6 is the largest you
>> want to go. If you put a bored out TB for the I6 on your 4
>> it will run so lean the engine will melt. :) Well, maby not
>> that lean, but it will run like crap cause you essentially overtook
>> the injectors.
> A larger throttle body *may* help at WOT. For normal driving, the PCM will
> simply adapt to it the same way it adapts to vacuum leaks. It adds more fuel
> and you gain no performance.
Actually it changes the whole power curve, not just the top end with
the net result being the engine can breathe easier at higher revs.
By itself you might be looking at 2-3HP gain, the benefit comes when
your moving more air like I do with the supercharger.
Within limits anything that lowers intake and exhaust resistance improves
efficiency. I say "within limits" because resistance is necessary for the
engine to scavenge properly. Most modern engines use the O2 sensor to
set the mix, with the TPS acting as a sanity check and WOT signal.
> "DougW" wrote:
>
>> BNB7 did pass the time by typing:
>>> I was thinking about putting one of these chips in my '95 XJ. Does anyone
>>> have any experience with these chips. Do they actually work? Do you think
>>> they're worth couple hundred bucks or what could I buy for the same money
>>> that would do the same thing?
>>
>> Save your money.
>>
>> Best first steps would be
>> 1) cat-back, gibson, borla, etc.
>> 2) new exhaust headers
>> 3) bored over throttle body.
>>
>> You don't give an engine size so be aware of this gotcha.
>> If you have the 4 banger, the TB from a I6 is the largest you
>> want to go. If you put a bored out TB for the I6 on your 4
>> it will run so lean the engine will melt. :) Well, maby not
>> that lean, but it will run like crap cause you essentially overtook
>> the injectors.
12-28-2003, 07:57 PM
#16
Guest
Posts: n/a
Re: Jet Power chips?
bllsht did pass the time by typing:
> A larger throttle body *may* help at WOT. For normal driving, the PCM will
> simply adapt to it the same way it adapts to vacuum leaks. It adds more fuel
> and you gain no performance.
Actually it changes the whole power curve, not just the top end with
the net result being the engine can breathe easier at higher revs.
By itself you might be looking at 2-3HP gain, the benefit comes when
your moving more air like I do with the supercharger.
Within limits anything that lowers intake and exhaust resistance improves
efficiency. I say "within limits" because resistance is necessary for the
engine to scavenge properly. Most modern engines use the O2 sensor to
set the mix, with the TPS acting as a sanity check and WOT signal.
> "DougW" wrote:
>
>> BNB7 did pass the time by typing:
>>> I was thinking about putting one of these chips in my '95 XJ. Does anyone
>>> have any experience with these chips. Do they actually work? Do you think
>>> they're worth couple hundred bucks or what could I buy for the same money
>>> that would do the same thing?
>>
>> Save your money.
>>
>> Best first steps would be
>> 1) cat-back, gibson, borla, etc.
>> 2) new exhaust headers
>> 3) bored over throttle body.
>>
>> You don't give an engine size so be aware of this gotcha.
>> If you have the 4 banger, the TB from a I6 is the largest you
>> want to go. If you put a bored out TB for the I6 on your 4
>> it will run so lean the engine will melt. :) Well, maby not
>> that lean, but it will run like crap cause you essentially overtook
>> the injectors.
> A larger throttle body *may* help at WOT. For normal driving, the PCM will
> simply adapt to it the same way it adapts to vacuum leaks. It adds more fuel
> and you gain no performance.
Actually it changes the whole power curve, not just the top end with
the net result being the engine can breathe easier at higher revs.
By itself you might be looking at 2-3HP gain, the benefit comes when
your moving more air like I do with the supercharger.
Within limits anything that lowers intake and exhaust resistance improves
efficiency. I say "within limits" because resistance is necessary for the
engine to scavenge properly. Most modern engines use the O2 sensor to
set the mix, with the TPS acting as a sanity check and WOT signal.
> "DougW" wrote:
>
>> BNB7 did pass the time by typing:
>>> I was thinking about putting one of these chips in my '95 XJ. Does anyone
>>> have any experience with these chips. Do they actually work? Do you think
>>> they're worth couple hundred bucks or what could I buy for the same money
>>> that would do the same thing?
>>
>> Save your money.
>>
>> Best first steps would be
>> 1) cat-back, gibson, borla, etc.
>> 2) new exhaust headers
>> 3) bored over throttle body.
>>
>> You don't give an engine size so be aware of this gotcha.
>> If you have the 4 banger, the TB from a I6 is the largest you
>> want to go. If you put a bored out TB for the I6 on your 4
>> it will run so lean the engine will melt. :) Well, maby not
>> that lean, but it will run like crap cause you essentially overtook
>> the injectors.
12-28-2003, 10:00 PM
#17
Guest
Posts: n/a
Re: Jet Power chips?
I'd throw in my two cents and agree with Doug on the TB issue. I put a
bored out 4.0L TB on my 2.5L and it SUCKED. Well, literally and
figuratively. I could only use a fraction of the throttle before it started
bogging down (i.e. running WAY lean). I sold it to a buddy with a 4.0L and
took his stock TB. Everything is better now. :-)
I have the 2.5L and have done the following intake mods:
1. Cold air intake and TB spacer.
Results: TB spacer is probably a HUGE waste of money. I had not found
this forum yet, so I learned the hard way. I would say the intake made a
difference. I live on a hill and can do it in higher gears than I could
before putting it in.
2. 4.0L TB swap
Results: Small change, but noticeable. Note that I went from the bored
out 4.0L TB (which at times was GREAT... only on heavy acceleration, really,
and only if I found the "sweet spot" on the throttle) to the stock 4.0L TB.
Overall: I like the CAI and the 4.0L TB. I'd do it again. However, if I
had the 4.0L, I wouldn't have touched it. It has enough power and I
wouldn't want to let all of the other crud in through the intake. I will
eventually sell my TJ for a Rubi anyhow.
I will be swapping out exhausts this summer as I seem to have already
developed a leak in my muffler (at 39k miles!). If my manifold has cracked
by then (as they tend to do, so I am told) I'll replace it too.
Eric
99 TJ SE
"DougW" <post.replies@invalid.address> wrote in message
news:wtIHb.30562$PK3.771@okepread01...
> BNB7 did pass the time by typing:
> > I was thinking about putting one of these chips in my '95 XJ. Does
anyone have
> > any experience with these chips. Do they actually work? Do you think
they're
> > worth couple hundred bucks or what could I buy for the same money that
would
> > do the same thing?
>
> Save your money.
>
> Best first steps would be
> 1) cat-back, gibson, borla, etc.
> 2) new exhaust headers
> 3) bored over throttle body.
>
> You don't give an engine size so be aware of this gotcha.
> If you have the 4 banger, the TB from a I6 is the largest you
> want to go. If you put a bored out TB for the I6 on your 4
> it will run so lean the engine will melt. :) Well, maby not
> that lean, but it will run like crap cause you essentially overtook
> the injectors.
>
>
> --
> -- DougW -- 93 ZJ 4.0 http://members.***.net/wilsond
> HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
> Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
>
>
>
bored out 4.0L TB on my 2.5L and it SUCKED. Well, literally and
figuratively. I could only use a fraction of the throttle before it started
bogging down (i.e. running WAY lean). I sold it to a buddy with a 4.0L and
took his stock TB. Everything is better now. :-)
I have the 2.5L and have done the following intake mods:
1. Cold air intake and TB spacer.
Results: TB spacer is probably a HUGE waste of money. I had not found
this forum yet, so I learned the hard way. I would say the intake made a
difference. I live on a hill and can do it in higher gears than I could
before putting it in.
2. 4.0L TB swap
Results: Small change, but noticeable. Note that I went from the bored
out 4.0L TB (which at times was GREAT... only on heavy acceleration, really,
and only if I found the "sweet spot" on the throttle) to the stock 4.0L TB.
Overall: I like the CAI and the 4.0L TB. I'd do it again. However, if I
had the 4.0L, I wouldn't have touched it. It has enough power and I
wouldn't want to let all of the other crud in through the intake. I will
eventually sell my TJ for a Rubi anyhow.
I will be swapping out exhausts this summer as I seem to have already
developed a leak in my muffler (at 39k miles!). If my manifold has cracked
by then (as they tend to do, so I am told) I'll replace it too.
Eric
99 TJ SE
"DougW" <post.replies@invalid.address> wrote in message
news:wtIHb.30562$PK3.771@okepread01...
> BNB7 did pass the time by typing:
> > I was thinking about putting one of these chips in my '95 XJ. Does
anyone have
> > any experience with these chips. Do they actually work? Do you think
they're
> > worth couple hundred bucks or what could I buy for the same money that
would
> > do the same thing?
>
> Save your money.
>
> Best first steps would be
> 1) cat-back, gibson, borla, etc.
> 2) new exhaust headers
> 3) bored over throttle body.
>
> You don't give an engine size so be aware of this gotcha.
> If you have the 4 banger, the TB from a I6 is the largest you
> want to go. If you put a bored out TB for the I6 on your 4
> it will run so lean the engine will melt. :) Well, maby not
> that lean, but it will run like crap cause you essentially overtook
> the injectors.
>
>
> --
> -- DougW -- 93 ZJ 4.0 http://members.***.net/wilsond
> HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
> Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
>
>
>
12-28-2003, 10:00 PM
#18
Guest
Posts: n/a
Re: Jet Power chips?
I'd throw in my two cents and agree with Doug on the TB issue. I put a
bored out 4.0L TB on my 2.5L and it SUCKED. Well, literally and
figuratively. I could only use a fraction of the throttle before it started
bogging down (i.e. running WAY lean). I sold it to a buddy with a 4.0L and
took his stock TB. Everything is better now. :-)
I have the 2.5L and have done the following intake mods:
1. Cold air intake and TB spacer.
Results: TB spacer is probably a HUGE waste of money. I had not found
this forum yet, so I learned the hard way. I would say the intake made a
difference. I live on a hill and can do it in higher gears than I could
before putting it in.
2. 4.0L TB swap
Results: Small change, but noticeable. Note that I went from the bored
out 4.0L TB (which at times was GREAT... only on heavy acceleration, really,
and only if I found the "sweet spot" on the throttle) to the stock 4.0L TB.
Overall: I like the CAI and the 4.0L TB. I'd do it again. However, if I
had the 4.0L, I wouldn't have touched it. It has enough power and I
wouldn't want to let all of the other crud in through the intake. I will
eventually sell my TJ for a Rubi anyhow.
I will be swapping out exhausts this summer as I seem to have already
developed a leak in my muffler (at 39k miles!). If my manifold has cracked
by then (as they tend to do, so I am told) I'll replace it too.
Eric
99 TJ SE
"DougW" <post.replies@invalid.address> wrote in message
news:wtIHb.30562$PK3.771@okepread01...
> BNB7 did pass the time by typing:
> > I was thinking about putting one of these chips in my '95 XJ. Does
anyone have
> > any experience with these chips. Do they actually work? Do you think
they're
> > worth couple hundred bucks or what could I buy for the same money that
would
> > do the same thing?
>
> Save your money.
>
> Best first steps would be
> 1) cat-back, gibson, borla, etc.
> 2) new exhaust headers
> 3) bored over throttle body.
>
> You don't give an engine size so be aware of this gotcha.
> If you have the 4 banger, the TB from a I6 is the largest you
> want to go. If you put a bored out TB for the I6 on your 4
> it will run so lean the engine will melt. :) Well, maby not
> that lean, but it will run like crap cause you essentially overtook
> the injectors.
>
>
> --
> -- DougW -- 93 ZJ 4.0 http://members.***.net/wilsond
> HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
> Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
>
>
>
bored out 4.0L TB on my 2.5L and it SUCKED. Well, literally and
figuratively. I could only use a fraction of the throttle before it started
bogging down (i.e. running WAY lean). I sold it to a buddy with a 4.0L and
took his stock TB. Everything is better now. :-)
I have the 2.5L and have done the following intake mods:
1. Cold air intake and TB spacer.
Results: TB spacer is probably a HUGE waste of money. I had not found
this forum yet, so I learned the hard way. I would say the intake made a
difference. I live on a hill and can do it in higher gears than I could
before putting it in.
2. 4.0L TB swap
Results: Small change, but noticeable. Note that I went from the bored
out 4.0L TB (which at times was GREAT... only on heavy acceleration, really,
and only if I found the "sweet spot" on the throttle) to the stock 4.0L TB.
Overall: I like the CAI and the 4.0L TB. I'd do it again. However, if I
had the 4.0L, I wouldn't have touched it. It has enough power and I
wouldn't want to let all of the other crud in through the intake. I will
eventually sell my TJ for a Rubi anyhow.
I will be swapping out exhausts this summer as I seem to have already
developed a leak in my muffler (at 39k miles!). If my manifold has cracked
by then (as they tend to do, so I am told) I'll replace it too.
Eric
99 TJ SE
"DougW" <post.replies@invalid.address> wrote in message
news:wtIHb.30562$PK3.771@okepread01...
> BNB7 did pass the time by typing:
> > I was thinking about putting one of these chips in my '95 XJ. Does
anyone have
> > any experience with these chips. Do they actually work? Do you think
they're
> > worth couple hundred bucks or what could I buy for the same money that
would
> > do the same thing?
>
> Save your money.
>
> Best first steps would be
> 1) cat-back, gibson, borla, etc.
> 2) new exhaust headers
> 3) bored over throttle body.
>
> You don't give an engine size so be aware of this gotcha.
> If you have the 4 banger, the TB from a I6 is the largest you
> want to go. If you put a bored out TB for the I6 on your 4
> it will run so lean the engine will melt. :) Well, maby not
> that lean, but it will run like crap cause you essentially overtook
> the injectors.
>
>
> --
> -- DougW -- 93 ZJ 4.0 http://members.***.net/wilsond
> HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
> Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
>
>
>
12-28-2003, 10:00 PM
#19
Guest
Posts: n/a
Re: Jet Power chips?
I'd throw in my two cents and agree with Doug on the TB issue. I put a
bored out 4.0L TB on my 2.5L and it SUCKED. Well, literally and
figuratively. I could only use a fraction of the throttle before it started
bogging down (i.e. running WAY lean). I sold it to a buddy with a 4.0L and
took his stock TB. Everything is better now. :-)
I have the 2.5L and have done the following intake mods:
1. Cold air intake and TB spacer.
Results: TB spacer is probably a HUGE waste of money. I had not found
this forum yet, so I learned the hard way. I would say the intake made a
difference. I live on a hill and can do it in higher gears than I could
before putting it in.
2. 4.0L TB swap
Results: Small change, but noticeable. Note that I went from the bored
out 4.0L TB (which at times was GREAT... only on heavy acceleration, really,
and only if I found the "sweet spot" on the throttle) to the stock 4.0L TB.
Overall: I like the CAI and the 4.0L TB. I'd do it again. However, if I
had the 4.0L, I wouldn't have touched it. It has enough power and I
wouldn't want to let all of the other crud in through the intake. I will
eventually sell my TJ for a Rubi anyhow.
I will be swapping out exhausts this summer as I seem to have already
developed a leak in my muffler (at 39k miles!). If my manifold has cracked
by then (as they tend to do, so I am told) I'll replace it too.
Eric
99 TJ SE
"DougW" <post.replies@invalid.address> wrote in message
news:wtIHb.30562$PK3.771@okepread01...
> BNB7 did pass the time by typing:
> > I was thinking about putting one of these chips in my '95 XJ. Does
anyone have
> > any experience with these chips. Do they actually work? Do you think
they're
> > worth couple hundred bucks or what could I buy for the same money that
would
> > do the same thing?
>
> Save your money.
>
> Best first steps would be
> 1) cat-back, gibson, borla, etc.
> 2) new exhaust headers
> 3) bored over throttle body.
>
> You don't give an engine size so be aware of this gotcha.
> If you have the 4 banger, the TB from a I6 is the largest you
> want to go. If you put a bored out TB for the I6 on your 4
> it will run so lean the engine will melt. :) Well, maby not
> that lean, but it will run like crap cause you essentially overtook
> the injectors.
>
>
> --
> -- DougW -- 93 ZJ 4.0 http://members.***.net/wilsond
> HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
> Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
>
>
>
bored out 4.0L TB on my 2.5L and it SUCKED. Well, literally and
figuratively. I could only use a fraction of the throttle before it started
bogging down (i.e. running WAY lean). I sold it to a buddy with a 4.0L and
took his stock TB. Everything is better now. :-)
I have the 2.5L and have done the following intake mods:
1. Cold air intake and TB spacer.
Results: TB spacer is probably a HUGE waste of money. I had not found
this forum yet, so I learned the hard way. I would say the intake made a
difference. I live on a hill and can do it in higher gears than I could
before putting it in.
2. 4.0L TB swap
Results: Small change, but noticeable. Note that I went from the bored
out 4.0L TB (which at times was GREAT... only on heavy acceleration, really,
and only if I found the "sweet spot" on the throttle) to the stock 4.0L TB.
Overall: I like the CAI and the 4.0L TB. I'd do it again. However, if I
had the 4.0L, I wouldn't have touched it. It has enough power and I
wouldn't want to let all of the other crud in through the intake. I will
eventually sell my TJ for a Rubi anyhow.
I will be swapping out exhausts this summer as I seem to have already
developed a leak in my muffler (at 39k miles!). If my manifold has cracked
by then (as they tend to do, so I am told) I'll replace it too.
Eric
99 TJ SE
"DougW" <post.replies@invalid.address> wrote in message
news:wtIHb.30562$PK3.771@okepread01...
> BNB7 did pass the time by typing:
> > I was thinking about putting one of these chips in my '95 XJ. Does
anyone have
> > any experience with these chips. Do they actually work? Do you think
they're
> > worth couple hundred bucks or what could I buy for the same money that
would
> > do the same thing?
>
> Save your money.
>
> Best first steps would be
> 1) cat-back, gibson, borla, etc.
> 2) new exhaust headers
> 3) bored over throttle body.
>
> You don't give an engine size so be aware of this gotcha.
> If you have the 4 banger, the TB from a I6 is the largest you
> want to go. If you put a bored out TB for the I6 on your 4
> it will run so lean the engine will melt. :) Well, maby not
> that lean, but it will run like crap cause you essentially overtook
> the injectors.
>
>
> --
> -- DougW -- 93 ZJ 4.0 http://members.***.net/wilsond
> HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
> Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
>
>
>
12-29-2003, 02:38 AM
#20
Guest
Posts: n/a
Re: Jet Power chips?
In message <KZKHb.30576$PK3.24616@okepread01>, "DougW" wrote:
>bllsht did pass the time by typing:
>> A larger throttle body *may* help at WOT. For normal driving, the PCM will
>> simply adapt to it the same way it adapts to vacuum leaks. It adds more fuel
>> and you gain no performance.
>
>Actually it changes the whole power curve, not just the top end with
>the net result being the engine can breathe easier at higher revs.
>By itself you might be looking at 2-3HP gain, the benefit comes when
>your moving more air like I do with the supercharger.
By using a larger throttle body, you're just increasing the maximum amount of
air that can get into the engine at WOT, so you may get more top end power.
Less than WOT, and it's the same as opening the throttle a little more on a
stock TB, or pulling off a big vacuum hose to allow more air in. Yeah, the RPM
goes up, but has there been a hp gain? It may be "perceived" as more power
because it takes less throttle action to let the same amount of air in. The
same perception could be gained by changing accelerator linkage geometry.
A supercharger is a different ball game, and would probably benefit from a
larger TB.
>Within limits anything that lowers intake and exhaust resistance improves
>efficiency. I say "within limits" because resistance is necessary for the
>engine to scavenge properly. Most modern engines use the O2 sensor to
>set the mix, with the TPS acting as a sanity check and WOT signal.
>
>> "DougW" wrote:
>>
>>> BNB7 did pass the time by typing:
>>>> I was thinking about putting one of these chips in my '95 XJ. Does anyone
>>>> have any experience with these chips. Do they actually work? Do you think
>>>> they're worth couple hundred bucks or what could I buy for the same money
>>>> that would do the same thing?
>>>
>>> Save your money.
>>>
>>> Best first steps would be
>>> 1) cat-back, gibson, borla, etc.
>>> 2) new exhaust headers
>>> 3) bored over throttle body.
>>>
>>> You don't give an engine size so be aware of this gotcha.
>>> If you have the 4 banger, the TB from a I6 is the largest you
>>> want to go. If you put a bored out TB for the I6 on your 4
>>> it will run so lean the engine will melt. :) Well, maby not
>>> that lean, but it will run like crap cause you essentially overtook
>>> the injectors.
>
>
>bllsht did pass the time by typing:
>> A larger throttle body *may* help at WOT. For normal driving, the PCM will
>> simply adapt to it the same way it adapts to vacuum leaks. It adds more fuel
>> and you gain no performance.
>
>Actually it changes the whole power curve, not just the top end with
>the net result being the engine can breathe easier at higher revs.
>By itself you might be looking at 2-3HP gain, the benefit comes when
>your moving more air like I do with the supercharger.
By using a larger throttle body, you're just increasing the maximum amount of
air that can get into the engine at WOT, so you may get more top end power.
Less than WOT, and it's the same as opening the throttle a little more on a
stock TB, or pulling off a big vacuum hose to allow more air in. Yeah, the RPM
goes up, but has there been a hp gain? It may be "perceived" as more power
because it takes less throttle action to let the same amount of air in. The
same perception could be gained by changing accelerator linkage geometry.
A supercharger is a different ball game, and would probably benefit from a
larger TB.
>Within limits anything that lowers intake and exhaust resistance improves
>efficiency. I say "within limits" because resistance is necessary for the
>engine to scavenge properly. Most modern engines use the O2 sensor to
>set the mix, with the TPS acting as a sanity check and WOT signal.
>
>> "DougW" wrote:
>>
>>> BNB7 did pass the time by typing:
>>>> I was thinking about putting one of these chips in my '95 XJ. Does anyone
>>>> have any experience with these chips. Do they actually work? Do you think
>>>> they're worth couple hundred bucks or what could I buy for the same money
>>>> that would do the same thing?
>>>
>>> Save your money.
>>>
>>> Best first steps would be
>>> 1) cat-back, gibson, borla, etc.
>>> 2) new exhaust headers
>>> 3) bored over throttle body.
>>>
>>> You don't give an engine size so be aware of this gotcha.
>>> If you have the 4 banger, the TB from a I6 is the largest you
>>> want to go. If you put a bored out TB for the I6 on your 4
>>> it will run so lean the engine will melt. :) Well, maby not
>>> that lean, but it will run like crap cause you essentially overtook
>>> the injectors.
>
>
