'98 XJ 4.0L benefit of headers?
02-27-2007, 07:57 PM
#11
Guest
Posts: n/a
Re: '98 XJ 4.0L benefit of headers?
I'd surely fix the restriction, along with robbing you of power and
economy, it may burn an exhaust valve:
http://www.1aauto.com/1A/ExhaustMani...EM00146/400479
God Bless America, Bill 0|||||||0
mailto:-------------------- http://www.----------.com/
<98XJ> wrote in message news:7le9u2tlu4gbsriefjcaf4kit0rj504b6p@4ax.com...
> Hello, group -
> While crawling under my XJ 4.0L, I have been amazed by the degree to
> which the downpipe from the exhaust manifold is collapsed. It is 2/3
> shut at the bend.
>
> I have mentioned this at both the local 4WD shop and at the dealership
> parts counter, and the replies have been something to the effect that
> "Those 4 Litres seem to like the restriction", to "That's normal.
> They're all formed like that".
>
> When I read about modifications for power, those most popular seem to
> be (not necessarily in their order):
> 1. Replace cat-back
> 2. Headers
> 3. Bored-out throttle body
> 4. low-restriction intake
>
> What do the experts on this board think? Does this engine really
> benefit from headers,since it seems as though it was engineered for
> significant back-pressure?
>
> Thanks.
>
> jim
--
Posted via a free Usenet account from http://www.teranews.com
economy, it may burn an exhaust valve:
http://www.1aauto.com/1A/ExhaustMani...EM00146/400479
God Bless America, Bill 0|||||||0
mailto:-------------------- http://www.----------.com/
<98XJ> wrote in message news:7le9u2tlu4gbsriefjcaf4kit0rj504b6p@4ax.com...
> Hello, group -
> While crawling under my XJ 4.0L, I have been amazed by the degree to
> which the downpipe from the exhaust manifold is collapsed. It is 2/3
> shut at the bend.
>
> I have mentioned this at both the local 4WD shop and at the dealership
> parts counter, and the replies have been something to the effect that
> "Those 4 Litres seem to like the restriction", to "That's normal.
> They're all formed like that".
>
> When I read about modifications for power, those most popular seem to
> be (not necessarily in their order):
> 1. Replace cat-back
> 2. Headers
> 3. Bored-out throttle body
> 4. low-restriction intake
>
> What do the experts on this board think? Does this engine really
> benefit from headers,since it seems as though it was engineered for
> significant back-pressure?
>
> Thanks.
>
> jim
--
Posted via a free Usenet account from http://www.teranews.com
02-27-2007, 07:57 PM
#12
Guest
Posts: n/a
Re: '98 XJ 4.0L benefit of headers?
I'd surely fix the restriction, along with robbing you of power and
economy, it may burn an exhaust valve:
http://www.1aauto.com/1A/ExhaustMani...EM00146/400479
God Bless America, Bill 0|||||||0
mailto:-------------------- http://www.----------.com/
<98XJ> wrote in message news:7le9u2tlu4gbsriefjcaf4kit0rj504b6p@4ax.com...
> Hello, group -
> While crawling under my XJ 4.0L, I have been amazed by the degree to
> which the downpipe from the exhaust manifold is collapsed. It is 2/3
> shut at the bend.
>
> I have mentioned this at both the local 4WD shop and at the dealership
> parts counter, and the replies have been something to the effect that
> "Those 4 Litres seem to like the restriction", to "That's normal.
> They're all formed like that".
>
> When I read about modifications for power, those most popular seem to
> be (not necessarily in their order):
> 1. Replace cat-back
> 2. Headers
> 3. Bored-out throttle body
> 4. low-restriction intake
>
> What do the experts on this board think? Does this engine really
> benefit from headers,since it seems as though it was engineered for
> significant back-pressure?
>
> Thanks.
>
> jim
--
Posted via a free Usenet account from http://www.teranews.com
economy, it may burn an exhaust valve:
http://www.1aauto.com/1A/ExhaustMani...EM00146/400479
God Bless America, Bill 0|||||||0
mailto:-------------------- http://www.----------.com/
<98XJ> wrote in message news:7le9u2tlu4gbsriefjcaf4kit0rj504b6p@4ax.com...
> Hello, group -
> While crawling under my XJ 4.0L, I have been amazed by the degree to
> which the downpipe from the exhaust manifold is collapsed. It is 2/3
> shut at the bend.
>
> I have mentioned this at both the local 4WD shop and at the dealership
> parts counter, and the replies have been something to the effect that
> "Those 4 Litres seem to like the restriction", to "That's normal.
> They're all formed like that".
>
> When I read about modifications for power, those most popular seem to
> be (not necessarily in their order):
> 1. Replace cat-back
> 2. Headers
> 3. Bored-out throttle body
> 4. low-restriction intake
>
> What do the experts on this board think? Does this engine really
> benefit from headers,since it seems as though it was engineered for
> significant back-pressure?
>
> Thanks.
>
> jim
--
Posted via a free Usenet account from http://www.teranews.com
02-27-2007, 07:57 PM
#13
Guest
Posts: n/a
Re: '98 XJ 4.0L benefit of headers?
I'd surely fix the restriction, along with robbing you of power and
economy, it may burn an exhaust valve:
http://www.1aauto.com/1A/ExhaustMani...EM00146/400479
God Bless America, Bill 0|||||||0
mailto:-------------------- http://www.----------.com/
<98XJ> wrote in message news:7le9u2tlu4gbsriefjcaf4kit0rj504b6p@4ax.com...
> Hello, group -
> While crawling under my XJ 4.0L, I have been amazed by the degree to
> which the downpipe from the exhaust manifold is collapsed. It is 2/3
> shut at the bend.
>
> I have mentioned this at both the local 4WD shop and at the dealership
> parts counter, and the replies have been something to the effect that
> "Those 4 Litres seem to like the restriction", to "That's normal.
> They're all formed like that".
>
> When I read about modifications for power, those most popular seem to
> be (not necessarily in their order):
> 1. Replace cat-back
> 2. Headers
> 3. Bored-out throttle body
> 4. low-restriction intake
>
> What do the experts on this board think? Does this engine really
> benefit from headers,since it seems as though it was engineered for
> significant back-pressure?
>
> Thanks.
>
> jim
--
Posted via a free Usenet account from http://www.teranews.com
economy, it may burn an exhaust valve:
http://www.1aauto.com/1A/ExhaustMani...EM00146/400479
God Bless America, Bill 0|||||||0
mailto:-------------------- http://www.----------.com/
<98XJ> wrote in message news:7le9u2tlu4gbsriefjcaf4kit0rj504b6p@4ax.com...
> Hello, group -
> While crawling under my XJ 4.0L, I have been amazed by the degree to
> which the downpipe from the exhaust manifold is collapsed. It is 2/3
> shut at the bend.
>
> I have mentioned this at both the local 4WD shop and at the dealership
> parts counter, and the replies have been something to the effect that
> "Those 4 Litres seem to like the restriction", to "That's normal.
> They're all formed like that".
>
> When I read about modifications for power, those most popular seem to
> be (not necessarily in their order):
> 1. Replace cat-back
> 2. Headers
> 3. Bored-out throttle body
> 4. low-restriction intake
>
> What do the experts on this board think? Does this engine really
> benefit from headers,since it seems as though it was engineered for
> significant back-pressure?
>
> Thanks.
>
> jim
--
Posted via a free Usenet account from http://www.teranews.com
02-27-2007, 10:12 PM
#14
Guest
Posts: n/a
Re: '98 XJ 4.0L benefit of headers?
The XJ 4.0 IS the inline 6, not some weenie V6 <G>.
Jeff DeWitt
98XJ wrote:
> My 4.0 is the Inline 6, not a V-6.
>
> On Wed, 28 Feb 2007 00:00:09 GMT, "abomb69" <abuse@verizon.net> wrote:
>
>
>>The 4.0 in my opinion has quite a bit of power for a V6. But I would also
>>like to find out some little mods to get some edge
>>
>>
>><98XJ> wrote in message news:7le9u2tlu4gbsriefjcaf4kit0rj504b6p@4ax.com...
>>
>>>Hello, group -
>>>While crawling under my XJ 4.0L, I have been amazed by the degree to
>>>which the downpipe from the exhaust manifold is collapsed. It is 2/3
>>>shut at the bend.
>>>
>>>I have mentioned this at both the local 4WD shop and at the dealership
>>>parts counter, and the replies have been something to the effect that
>>>"Those 4 Litres seem to like the restriction", to "That's normal.
>>>They're all formed like that".
>>>
>>>When I read about modifications for power, those most popular seem to
>>>be (not necessarily in their order):
>>>1. Replace cat-back
>>>2. Headers
>>>3. Bored-out throttle body
>>>4. low-restriction intake
>>>
>>>What do the experts on this board think? Does this engine really
>>>benefit from headers,since it seems as though it was engineered for
>>>significant back-pressure?
>>>
>>>Thanks.
>>>
>>>jim
>>
>
Jeff DeWitt
98XJ wrote:
> My 4.0 is the Inline 6, not a V-6.
>
> On Wed, 28 Feb 2007 00:00:09 GMT, "abomb69" <abuse@verizon.net> wrote:
>
>
>>The 4.0 in my opinion has quite a bit of power for a V6. But I would also
>>like to find out some little mods to get some edge
>>
>>
>><98XJ> wrote in message news:7le9u2tlu4gbsriefjcaf4kit0rj504b6p@4ax.com...
>>
>>>Hello, group -
>>>While crawling under my XJ 4.0L, I have been amazed by the degree to
>>>which the downpipe from the exhaust manifold is collapsed. It is 2/3
>>>shut at the bend.
>>>
>>>I have mentioned this at both the local 4WD shop and at the dealership
>>>parts counter, and the replies have been something to the effect that
>>>"Those 4 Litres seem to like the restriction", to "That's normal.
>>>They're all formed like that".
>>>
>>>When I read about modifications for power, those most popular seem to
>>>be (not necessarily in their order):
>>>1. Replace cat-back
>>>2. Headers
>>>3. Bored-out throttle body
>>>4. low-restriction intake
>>>
>>>What do the experts on this board think? Does this engine really
>>>benefit from headers,since it seems as though it was engineered for
>>>significant back-pressure?
>>>
>>>Thanks.
>>>
>>>jim
>>
>
02-27-2007, 10:12 PM
#15
Guest
Posts: n/a
Re: '98 XJ 4.0L benefit of headers?
The XJ 4.0 IS the inline 6, not some weenie V6 <G>.
Jeff DeWitt
98XJ wrote:
> My 4.0 is the Inline 6, not a V-6.
>
> On Wed, 28 Feb 2007 00:00:09 GMT, "abomb69" <abuse@verizon.net> wrote:
>
>
>>The 4.0 in my opinion has quite a bit of power for a V6. But I would also
>>like to find out some little mods to get some edge
>>
>>
>><98XJ> wrote in message news:7le9u2tlu4gbsriefjcaf4kit0rj504b6p@4ax.com...
>>
>>>Hello, group -
>>>While crawling under my XJ 4.0L, I have been amazed by the degree to
>>>which the downpipe from the exhaust manifold is collapsed. It is 2/3
>>>shut at the bend.
>>>
>>>I have mentioned this at both the local 4WD shop and at the dealership
>>>parts counter, and the replies have been something to the effect that
>>>"Those 4 Litres seem to like the restriction", to "That's normal.
>>>They're all formed like that".
>>>
>>>When I read about modifications for power, those most popular seem to
>>>be (not necessarily in their order):
>>>1. Replace cat-back
>>>2. Headers
>>>3. Bored-out throttle body
>>>4. low-restriction intake
>>>
>>>What do the experts on this board think? Does this engine really
>>>benefit from headers,since it seems as though it was engineered for
>>>significant back-pressure?
>>>
>>>Thanks.
>>>
>>>jim
>>
>
Jeff DeWitt
98XJ wrote:
> My 4.0 is the Inline 6, not a V-6.
>
> On Wed, 28 Feb 2007 00:00:09 GMT, "abomb69" <abuse@verizon.net> wrote:
>
>
>>The 4.0 in my opinion has quite a bit of power for a V6. But I would also
>>like to find out some little mods to get some edge
>>
>>
>><98XJ> wrote in message news:7le9u2tlu4gbsriefjcaf4kit0rj504b6p@4ax.com...
>>
>>>Hello, group -
>>>While crawling under my XJ 4.0L, I have been amazed by the degree to
>>>which the downpipe from the exhaust manifold is collapsed. It is 2/3
>>>shut at the bend.
>>>
>>>I have mentioned this at both the local 4WD shop and at the dealership
>>>parts counter, and the replies have been something to the effect that
>>>"Those 4 Litres seem to like the restriction", to "That's normal.
>>>They're all formed like that".
>>>
>>>When I read about modifications for power, those most popular seem to
>>>be (not necessarily in their order):
>>>1. Replace cat-back
>>>2. Headers
>>>3. Bored-out throttle body
>>>4. low-restriction intake
>>>
>>>What do the experts on this board think? Does this engine really
>>>benefit from headers,since it seems as though it was engineered for
>>>significant back-pressure?
>>>
>>>Thanks.
>>>
>>>jim
>>
>
02-27-2007, 10:12 PM
#16
Guest
Posts: n/a
Re: '98 XJ 4.0L benefit of headers?
The XJ 4.0 IS the inline 6, not some weenie V6 <G>.
Jeff DeWitt
98XJ wrote:
> My 4.0 is the Inline 6, not a V-6.
>
> On Wed, 28 Feb 2007 00:00:09 GMT, "abomb69" <abuse@verizon.net> wrote:
>
>
>>The 4.0 in my opinion has quite a bit of power for a V6. But I would also
>>like to find out some little mods to get some edge
>>
>>
>><98XJ> wrote in message news:7le9u2tlu4gbsriefjcaf4kit0rj504b6p@4ax.com...
>>
>>>Hello, group -
>>>While crawling under my XJ 4.0L, I have been amazed by the degree to
>>>which the downpipe from the exhaust manifold is collapsed. It is 2/3
>>>shut at the bend.
>>>
>>>I have mentioned this at both the local 4WD shop and at the dealership
>>>parts counter, and the replies have been something to the effect that
>>>"Those 4 Litres seem to like the restriction", to "That's normal.
>>>They're all formed like that".
>>>
>>>When I read about modifications for power, those most popular seem to
>>>be (not necessarily in their order):
>>>1. Replace cat-back
>>>2. Headers
>>>3. Bored-out throttle body
>>>4. low-restriction intake
>>>
>>>What do the experts on this board think? Does this engine really
>>>benefit from headers,since it seems as though it was engineered for
>>>significant back-pressure?
>>>
>>>Thanks.
>>>
>>>jim
>>
>
Jeff DeWitt
98XJ wrote:
> My 4.0 is the Inline 6, not a V-6.
>
> On Wed, 28 Feb 2007 00:00:09 GMT, "abomb69" <abuse@verizon.net> wrote:
>
>
>>The 4.0 in my opinion has quite a bit of power for a V6. But I would also
>>like to find out some little mods to get some edge
>>
>>
>><98XJ> wrote in message news:7le9u2tlu4gbsriefjcaf4kit0rj504b6p@4ax.com...
>>
>>>Hello, group -
>>>While crawling under my XJ 4.0L, I have been amazed by the degree to
>>>which the downpipe from the exhaust manifold is collapsed. It is 2/3
>>>shut at the bend.
>>>
>>>I have mentioned this at both the local 4WD shop and at the dealership
>>>parts counter, and the replies have been something to the effect that
>>>"Those 4 Litres seem to like the restriction", to "That's normal.
>>>They're all formed like that".
>>>
>>>When I read about modifications for power, those most popular seem to
>>>be (not necessarily in their order):
>>>1. Replace cat-back
>>>2. Headers
>>>3. Bored-out throttle body
>>>4. low-restriction intake
>>>
>>>What do the experts on this board think? Does this engine really
>>>benefit from headers,since it seems as though it was engineered for
>>>significant back-pressure?
>>>
>>>Thanks.
>>>
>>>jim
>>
>
02-27-2007, 10:17 PM
#17
Guest
Posts: n/a
Re: '98 XJ 4.0L benefit of headers?
Thanks for correcting me...But either way the inline 6 has quite a bit more
power than most V6s I've ever owned including the 4.3 GM
"Jeff DeWitt" <JeffDeWitt@nc.rr.com> wrote in message
news:45e4f31c$0$28138$4c368faf@roadrunner.com...
> The XJ 4.0 IS the inline 6, not some weenie V6 <G>.
>
> Jeff DeWitt
>
power than most V6s I've ever owned including the 4.3 GM
"Jeff DeWitt" <JeffDeWitt@nc.rr.com> wrote in message
news:45e4f31c$0$28138$4c368faf@roadrunner.com...
> The XJ 4.0 IS the inline 6, not some weenie V6 <G>.
>
> Jeff DeWitt
>
02-27-2007, 10:17 PM
#18
Guest
Posts: n/a
Re: '98 XJ 4.0L benefit of headers?
Thanks for correcting me...But either way the inline 6 has quite a bit more
power than most V6s I've ever owned including the 4.3 GM
"Jeff DeWitt" <JeffDeWitt@nc.rr.com> wrote in message
news:45e4f31c$0$28138$4c368faf@roadrunner.com...
> The XJ 4.0 IS the inline 6, not some weenie V6 <G>.
>
> Jeff DeWitt
>
power than most V6s I've ever owned including the 4.3 GM
"Jeff DeWitt" <JeffDeWitt@nc.rr.com> wrote in message
news:45e4f31c$0$28138$4c368faf@roadrunner.com...
> The XJ 4.0 IS the inline 6, not some weenie V6 <G>.
>
> Jeff DeWitt
>
02-27-2007, 10:17 PM
#19
Guest
Posts: n/a
Re: '98 XJ 4.0L benefit of headers?
Thanks for correcting me...But either way the inline 6 has quite a bit more
power than most V6s I've ever owned including the 4.3 GM
"Jeff DeWitt" <JeffDeWitt@nc.rr.com> wrote in message
news:45e4f31c$0$28138$4c368faf@roadrunner.com...
> The XJ 4.0 IS the inline 6, not some weenie V6 <G>.
>
> Jeff DeWitt
>
power than most V6s I've ever owned including the 4.3 GM
"Jeff DeWitt" <JeffDeWitt@nc.rr.com> wrote in message
news:45e4f31c$0$28138$4c368faf@roadrunner.com...
> The XJ 4.0 IS the inline 6, not some weenie V6 <G>.
>
> Jeff DeWitt
>
02-28-2007, 10:24 PM
#20
Guest
Posts: n/a
Re: '98 XJ 4.0L benefit of headers?
That's because it's a better engine <G>.
I've really embarrassed a few Mustang drivers with my little Cherokee,
that sucker is pretty fast. I expect that above 50 or so a Mustang
would pull away but in one of those little stoplight contest I'm not
going any faster than that... I'm no idiot and don't want to lose my
license for something as stupid as racing.
Jeff DeWitt
abomb69 wrote:
> Thanks for correcting me...But either way the inline 6 has quite a bit more
> power than most V6s I've ever owned including the 4.3 GM
>
> "Jeff DeWitt" <JeffDeWitt@nc.rr.com> wrote in message
> news:45e4f31c$0$28138$4c368faf@roadrunner.com...
>
>>The XJ 4.0 IS the inline 6, not some weenie V6 <G>.
>>
>>Jeff DeWitt
>>
>
>
>
I've really embarrassed a few Mustang drivers with my little Cherokee,
that sucker is pretty fast. I expect that above 50 or so a Mustang
would pull away but in one of those little stoplight contest I'm not
going any faster than that... I'm no idiot and don't want to lose my
license for something as stupid as racing.
Jeff DeWitt
abomb69 wrote:
> Thanks for correcting me...But either way the inline 6 has quite a bit more
> power than most V6s I've ever owned including the 4.3 GM
>
> "Jeff DeWitt" <JeffDeWitt@nc.rr.com> wrote in message
> news:45e4f31c$0$28138$4c368faf@roadrunner.com...
>
>>The XJ 4.0 IS the inline 6, not some weenie V6 <G>.
>>
>>Jeff DeWitt
>>
>
>
>