258 head swap?
10-02-2005, 02:13 AM
#11
Guest
Posts: n/a
Re: 258 head swap?
I added the Electronic Fuel injection in case he came to his
senses. I realize common sense is not one of your forte
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
Bret Ludwig wrote:?
>
> As is so often the case we fail the reading Comprehension Test.
senses. I realize common sense is not one of your forte
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
Bret Ludwig wrote:?
>
> As is so often the case we fail the reading Comprehension Test.
10-02-2005, 02:13 AM
#12
Guest
Posts: n/a
Re: 258 head swap?
I added the Electronic Fuel injection in case he came to his
senses. I realize common sense is not one of your forte
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
Bret Ludwig wrote:?
>
> As is so often the case we fail the reading Comprehension Test.
senses. I realize common sense is not one of your forte
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
Bret Ludwig wrote:?
>
> As is so often the case we fail the reading Comprehension Test.
10-02-2005, 02:13 AM
#13
Guest
Posts: n/a
Re: 258 head swap?
I added the Electronic Fuel injection in case he came to his
senses. I realize common sense is not one of your forte
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
Bret Ludwig wrote:?
>
> As is so often the case we fail the reading Comprehension Test.
senses. I realize common sense is not one of your forte
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
Bret Ludwig wrote:?
>
> As is so often the case we fail the reading Comprehension Test.
10-02-2005, 03:39 AM
#14
Guest
Posts: n/a
Re: 258 head swap?
L.W. ------ III (ßill) wrote:
> I added the Electronic Fuel injection in case he came to his
> senses. I realize common sense is not one of your forte
> God Bless America, Bill O|||||||O
Fuel injection systems aren't Mopar's forte, to judge from the factory
kit.
10-02-2005, 03:39 AM
#15
Guest
Posts: n/a
Re: 258 head swap?
L.W. ------ III (ßill) wrote:
> I added the Electronic Fuel injection in case he came to his
> senses. I realize common sense is not one of your forte
> God Bless America, Bill O|||||||O
Fuel injection systems aren't Mopar's forte, to judge from the factory
kit.
10-02-2005, 03:39 AM
#16
Guest
Posts: n/a
Re: 258 head swap?
L.W. ------ III (ßill) wrote:
> I added the Electronic Fuel injection in case he came to his
> senses. I realize common sense is not one of your forte
> God Bless America, Bill O|||||||O
Fuel injection systems aren't Mopar's forte, to judge from the factory
kit.
10-02-2005, 09:48 AM
#17
Guest
Posts: n/a
Re: 258 head swap?
If you are willing to trust some glue to hold all the coolant in, then
it might be a good thing. You can use the 4.2 intake, but the exhaust
manifold has to be 4.0.
All these guys that do any mods to the 4.2 like that head job or the FI
job all claim this big HP increase. Well... you get the same increase
they are crowing about for free by just killing the emissions computer
on the 82's to 91's, which by the way they have to do anyway for the
mods... LOL!
The rpm 'red line' goes from about 3300 rpm to 4400 and you get at least
a 10 mph increase in each gear.
My 86 CJ7 will just light up my 33's off the start if I punch it, it
then hits about 52 mph in 2nd at 4400 rpm, 3rd pulls hard up to 75 mph,
4th buries the speedo and I have no urge to find out how fast 5th will
go...
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Steve G wrote:
>
> Ive been reading about the 4.0 head swap for 4.2 motors. Is this really as
> good as it sounds or are there more headaches to be found?
>
> What all has to be replaced besides the head?
>
> Have to be fuel injected then?
>
> 40hp gain? really?
it might be a good thing. You can use the 4.2 intake, but the exhaust
manifold has to be 4.0.
All these guys that do any mods to the 4.2 like that head job or the FI
job all claim this big HP increase. Well... you get the same increase
they are crowing about for free by just killing the emissions computer
on the 82's to 91's, which by the way they have to do anyway for the
mods... LOL!
The rpm 'red line' goes from about 3300 rpm to 4400 and you get at least
a 10 mph increase in each gear.
My 86 CJ7 will just light up my 33's off the start if I punch it, it
then hits about 52 mph in 2nd at 4400 rpm, 3rd pulls hard up to 75 mph,
4th buries the speedo and I have no urge to find out how fast 5th will
go...
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Steve G wrote:
>
> Ive been reading about the 4.0 head swap for 4.2 motors. Is this really as
> good as it sounds or are there more headaches to be found?
>
> What all has to be replaced besides the head?
>
> Have to be fuel injected then?
>
> 40hp gain? really?
10-02-2005, 09:48 AM
#18
Guest
Posts: n/a
Re: 258 head swap?
If you are willing to trust some glue to hold all the coolant in, then
it might be a good thing. You can use the 4.2 intake, but the exhaust
manifold has to be 4.0.
All these guys that do any mods to the 4.2 like that head job or the FI
job all claim this big HP increase. Well... you get the same increase
they are crowing about for free by just killing the emissions computer
on the 82's to 91's, which by the way they have to do anyway for the
mods... LOL!
The rpm 'red line' goes from about 3300 rpm to 4400 and you get at least
a 10 mph increase in each gear.
My 86 CJ7 will just light up my 33's off the start if I punch it, it
then hits about 52 mph in 2nd at 4400 rpm, 3rd pulls hard up to 75 mph,
4th buries the speedo and I have no urge to find out how fast 5th will
go...
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Steve G wrote:
>
> Ive been reading about the 4.0 head swap for 4.2 motors. Is this really as
> good as it sounds or are there more headaches to be found?
>
> What all has to be replaced besides the head?
>
> Have to be fuel injected then?
>
> 40hp gain? really?
it might be a good thing. You can use the 4.2 intake, but the exhaust
manifold has to be 4.0.
All these guys that do any mods to the 4.2 like that head job or the FI
job all claim this big HP increase. Well... you get the same increase
they are crowing about for free by just killing the emissions computer
on the 82's to 91's, which by the way they have to do anyway for the
mods... LOL!
The rpm 'red line' goes from about 3300 rpm to 4400 and you get at least
a 10 mph increase in each gear.
My 86 CJ7 will just light up my 33's off the start if I punch it, it
then hits about 52 mph in 2nd at 4400 rpm, 3rd pulls hard up to 75 mph,
4th buries the speedo and I have no urge to find out how fast 5th will
go...
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Steve G wrote:
>
> Ive been reading about the 4.0 head swap for 4.2 motors. Is this really as
> good as it sounds or are there more headaches to be found?
>
> What all has to be replaced besides the head?
>
> Have to be fuel injected then?
>
> 40hp gain? really?
10-02-2005, 09:48 AM
#19
Guest
Posts: n/a
Re: 258 head swap?
If you are willing to trust some glue to hold all the coolant in, then
it might be a good thing. You can use the 4.2 intake, but the exhaust
manifold has to be 4.0.
All these guys that do any mods to the 4.2 like that head job or the FI
job all claim this big HP increase. Well... you get the same increase
they are crowing about for free by just killing the emissions computer
on the 82's to 91's, which by the way they have to do anyway for the
mods... LOL!
The rpm 'red line' goes from about 3300 rpm to 4400 and you get at least
a 10 mph increase in each gear.
My 86 CJ7 will just light up my 33's off the start if I punch it, it
then hits about 52 mph in 2nd at 4400 rpm, 3rd pulls hard up to 75 mph,
4th buries the speedo and I have no urge to find out how fast 5th will
go...
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Steve G wrote:
>
> Ive been reading about the 4.0 head swap for 4.2 motors. Is this really as
> good as it sounds or are there more headaches to be found?
>
> What all has to be replaced besides the head?
>
> Have to be fuel injected then?
>
> 40hp gain? really?
it might be a good thing. You can use the 4.2 intake, but the exhaust
manifold has to be 4.0.
All these guys that do any mods to the 4.2 like that head job or the FI
job all claim this big HP increase. Well... you get the same increase
they are crowing about for free by just killing the emissions computer
on the 82's to 91's, which by the way they have to do anyway for the
mods... LOL!
The rpm 'red line' goes from about 3300 rpm to 4400 and you get at least
a 10 mph increase in each gear.
My 86 CJ7 will just light up my 33's off the start if I punch it, it
then hits about 52 mph in 2nd at 4400 rpm, 3rd pulls hard up to 75 mph,
4th buries the speedo and I have no urge to find out how fast 5th will
go...
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Steve G wrote:
>
> Ive been reading about the 4.0 head swap for 4.2 motors. Is this really as
> good as it sounds or are there more headaches to be found?
>
> What all has to be replaced besides the head?
>
> Have to be fuel injected then?
>
> 40hp gain? really?
10-03-2005, 01:08 PM
#20
Guest
Posts: n/a
Re: 258 head swap?
With my header and carb setup I've had NO problems keeping up with 4.0L's. I
still have an HEI that I will install.
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:433FE516.9486B4F2@sympatico.ca...
> If you are willing to trust some glue to hold all the coolant in, then
> it might be a good thing. You can use the 4.2 intake, but the exhaust
> manifold has to be 4.0.
>
> All these guys that do any mods to the 4.2 like that head job or the FI
> job all claim this big HP increase. Well... you get the same increase
> they are crowing about for free by just killing the emissions computer
> on the 82's to 91's, which by the way they have to do anyway for the
> mods... LOL!
>
> The rpm 'red line' goes from about 3300 rpm to 4400 and you get at least
> a 10 mph increase in each gear.
>
> My 86 CJ7 will just light up my 33's off the start if I punch it, it
> then hits about 52 mph in 2nd at 4400 rpm, 3rd pulls hard up to 75 mph,
> 4th buries the speedo and I have no urge to find out how fast 5th will
> go...
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Steve G wrote:
>>
>> Ive been reading about the 4.0 head swap for 4.2 motors. Is this really
>> as
>> good as it sounds or are there more headaches to be found?
>>
>> What all has to be replaced besides the head?
>>
>> Have to be fuel injected then?
>>
>> 40hp gain? really?
still have an HEI that I will install.
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:433FE516.9486B4F2@sympatico.ca...
> If you are willing to trust some glue to hold all the coolant in, then
> it might be a good thing. You can use the 4.2 intake, but the exhaust
> manifold has to be 4.0.
>
> All these guys that do any mods to the 4.2 like that head job or the FI
> job all claim this big HP increase. Well... you get the same increase
> they are crowing about for free by just killing the emissions computer
> on the 82's to 91's, which by the way they have to do anyway for the
> mods... LOL!
>
> The rpm 'red line' goes from about 3300 rpm to 4400 and you get at least
> a 10 mph increase in each gear.
>
> My 86 CJ7 will just light up my 33's off the start if I punch it, it
> then hits about 52 mph in 2nd at 4400 rpm, 3rd pulls hard up to 75 mph,
> 4th buries the speedo and I have no urge to find out how fast 5th will
> go...
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Steve G wrote:
>>
>> Ive been reading about the 4.0 head swap for 4.2 motors. Is this really
>> as
>> good as it sounds or are there more headaches to be found?
>>
>> What all has to be replaced besides the head?
>>
>> Have to be fuel injected then?
>>
>> 40hp gain? really?