c

This is true only if the header is improperly designed for its application.
A properly designed header is as critical as picking the right camshaft. You
are right that some headers will hurt power in the desired RPM range. For a
4x4 vehicle, longer tubes with a small diameter and a long collector are the
best. The "shorty" or block hugger headers are all but useless. Most headers
are built based on ease of manufacture and also ease of installation. If you
want to learn a lot about headers, check out http://www.headersbyed.com. He
has an information packet and cassette or CD available that explained proper
header design. I have this packet, and it is very informative. I have also
seen a few cars running his stuff, and the guy knows his exhaust headers.

Chris

"Paul Calman" <spam@trap.com> wrote in message
news:3pu9n9Fccek6U1@individual.net...
> Low restriction/high flow headers are great for drag racing. They kill
your
> low end torque, though. Not what i would want to do to 4x4, but fun for
> buggies.
>
> --
> Paul Calman, Hathaway Pines, California
>
>

Billy Ray

Did you take a good look at the dyno results? something doesn't look right.

http://www.superchips.com/prod_imgs/makepdf-455.pdf

--
..
Billy_Ray@SPAM.fuse.net (remove SPAM)
2002 Jeep WJ 4 Liter Automatic
Sharing is why we are all here....... or should be.
..
"L.W. ("ßill") ------ III" <----------@***.net> wrote in message
news:433A1ED5.62F6B501@***.net...
> They make the chips Ford, Chevy, and Daimler's 4.7:
> http://www.superchips.com/home.phtml
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Bret Ludwig wrote:
>>
>> Wait another year and they will have software and an interface for a
>> laptop for $300 or so.

Billy Ray

Did you take a good look at the dyno results? something doesn't look right.

http://www.superchips.com/prod_imgs/makepdf-455.pdf

--
..
Billy_Ray@SPAM.fuse.net (remove SPAM)
2002 Jeep WJ 4 Liter Automatic
Sharing is why we are all here....... or should be.
..
"L.W. ("ßill") ------ III" <----------@***.net> wrote in message
news:433A1ED5.62F6B501@***.net...
> They make the chips Ford, Chevy, and Daimler's 4.7:
> http://www.superchips.com/home.phtml
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Bret Ludwig wrote:
>>
>> Wait another year and they will have software and an interface for a
>> laptop for $300 or so.

Billy Ray

Did you take a good look at the dyno results? something doesn't look right.

http://www.superchips.com/prod_imgs/makepdf-455.pdf

--
..
Billy_Ray@SPAM.fuse.net (remove SPAM)
2002 Jeep WJ 4 Liter Automatic
Sharing is why we are all here....... or should be.
..
"L.W. ("ßill") ------ III" <----------@***.net> wrote in message
news:433A1ED5.62F6B501@***.net...
> They make the chips Ford, Chevy, and Daimler's 4.7:
> http://www.superchips.com/home.phtml
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Bret Ludwig wrote:
>>
>> Wait another year and they will have software and an interface for a
>> laptop for $300 or so.

Billy Ray

Well.... shows what I know. I am only familiar with the manifolds on the
XJ, ZJ,and WJ models and assumed incorrectly that they were the same..

--
..
Billy_Ray@SPAM.fuse.net (remove SPAM)
2002 Jeep WJ 4 Liter Automatic
Sharing is why we are all here....... or should be.
..
"Dave Milne" <jeep@_nospam_milne.info> wrote in message
news:mBo_e.117082$G8.29700@text.news.blueyonder.co .uk...
> the exhaust's route round the front of the engine is fairly restrictive; I
> think that is one of the reasons the XJs put out more hp than the TJs for
> the same engine.
>
> Dave Milne, Scotland
> '91 Grand Wagoneer, '99 TJ
>
> "Billy Ray" <Billy_Ray@SPAMfuse.net> wrote in message
> news:3972d$4339e404$d8449845$10873@FUSE.NET...
>> The short story is your Jeep Intake and exhaust manifolds are pretty good
>> (better than most).
>
>

Billy Ray

Well.... shows what I know. I am only familiar with the manifolds on the
XJ, ZJ,and WJ models and assumed incorrectly that they were the same..

--
..
Billy_Ray@SPAM.fuse.net (remove SPAM)
2002 Jeep WJ 4 Liter Automatic
Sharing is why we are all here....... or should be.
..
"Dave Milne" <jeep@_nospam_milne.info> wrote in message
news:mBo_e.117082$G8.29700@text.news.blueyonder.co .uk...
> the exhaust's route round the front of the engine is fairly restrictive; I
> think that is one of the reasons the XJs put out more hp than the TJs for
> the same engine.
>
> Dave Milne, Scotland
> '91 Grand Wagoneer, '99 TJ
>
> "Billy Ray" <Billy_Ray@SPAMfuse.net> wrote in message
> news:3972d$4339e404$d8449845$10873@FUSE.NET...
>> The short story is your Jeep Intake and exhaust manifolds are pretty good
>> (better than most).
>
>

Billy Ray

Well.... shows what I know. I am only familiar with the manifolds on the
XJ, ZJ,and WJ models and assumed incorrectly that they were the same..

--
..
Billy_Ray@SPAM.fuse.net (remove SPAM)
2002 Jeep WJ 4 Liter Automatic
Sharing is why we are all here....... or should be.
..
"Dave Milne" <jeep@_nospam_milne.info> wrote in message
news:mBo_e.117082$G8.29700@text.news.blueyonder.co .uk...
> the exhaust's route round the front of the engine is fairly restrictive; I
> think that is one of the reasons the XJs put out more hp than the TJs for
> the same engine.
>
> Dave Milne, Scotland
> '91 Grand Wagoneer, '99 TJ
>
> "Billy Ray" <Billy_Ray@SPAMfuse.net> wrote in message
> news:3972d$4339e404$d8449845$10873@FUSE.NET...
>> The short story is your Jeep Intake and exhaust manifolds are pretty good
>> (better than most).
>
>

L.W.(=?iso-8859-1?Q?=DFill?=) Hughes III

Hi Bill,
Yup, done all the time, pretty well hidden under the small block
manifold. It only works for sleepers, cheating, as the heat takes too
much of the energy away:
http://www.----------.com/temp/nitrousManifold.jpg If you want to have a
consistent bracket racer, it's got to be on the outside.
God Bless America, Bill O|||||||O
mailto:--------------------

Billy Ray wrote:
>
> I remember reading an article in one of the hot rodding magazines about a
> guy who was a machinist who ran all the plumbing for the nitrous inside the
> intake manifold so there was only one plain black, easily concealable,
> rubber hose running to the manifold.
>
> --
> .
> Billy_Ray@SPAM.fuse.net (remove SPAM)
> 2002 Jeep WJ 4 Liter Automatic
> Sharing is why we are all here....... or should be.

L.W.(=?iso-8859-1?Q?=DFill?=) Hughes III

Hi Bill,
Yup, done all the time, pretty well hidden under the small block
manifold. It only works for sleepers, cheating, as the heat takes too
much of the energy away:
http://www.----------.com/temp/nitrousManifold.jpg If you want to have a
consistent bracket racer, it's got to be on the outside.
God Bless America, Bill O|||||||O
mailto:--------------------

Billy Ray wrote:
>
> I remember reading an article in one of the hot rodding magazines about a
> guy who was a machinist who ran all the plumbing for the nitrous inside the
> intake manifold so there was only one plain black, easily concealable,
> rubber hose running to the manifold.
>
> --
> .
> Billy_Ray@SPAM.fuse.net (remove SPAM)
> 2002 Jeep WJ 4 Liter Automatic
> Sharing is why we are all here....... or should be.

L.W.(=?iso-8859-1?Q?=DFill?=) Hughes III

Hi Bill,
Yup, done all the time, pretty well hidden under the small block
manifold. It only works for sleepers, cheating, as the heat takes too
much of the energy away:
http://www.----------.com/temp/nitrousManifold.jpg If you want to have a
consistent bracket racer, it's got to be on the outside.
God Bless America, Bill O|||||||O
mailto:--------------------

Billy Ray wrote:
>
> I remember reading an article in one of the hot rodding magazines about a
> guy who was a machinist who ran all the plumbing for the nitrous inside the
> intake manifold so there was only one plain black, easily concealable,
> rubber hose running to the manifold.
>
> --
> .
> Billy_Ray@SPAM.fuse.net (remove SPAM)
> 2002 Jeep WJ 4 Liter Automatic
> Sharing is why we are all here....... or should be.