I read that 01 style intake manifold has larger runner's, and with modified engines provides more horsepower and torque, on issue I see with this is as far as exhaust is concerned you can't use something like the borla longtube header, which I have been told collector area pipe is 2 1/4", where as the stock collector area pipe is 2" in diameter (at least in mid-90's) So the question is, whats ultimately better for power, the borla header with 93 H.O. style intake with bigger down pipe (I know its not a down pipe, I'm just calling it that) or the newer style intake manifold with the 2" down pipe. I am guessing an exhuast shop with a mandrel bender might be able to make a bigger diameter pipe, but it would probably be pretty expensive and it looks like only header for 01 style intake is the banks that I can see and it is a shorty header, not even sure if it would even have gains over stock manifold. So unless 2001 style have larger style "down pipes" I am curious as to what would ultimately be better for performance for a mildy modded stock engine and a decently modded stroker engine.

 

the issue with the borla is that it contacts the number 5 intake tube on the intake manifold.


the manifold itself doubles the volume it can contain, as well as having a better flow-design.

I modified my '01 intake with a die grinder and put a small dent in down tube on the borla header to make them fit.


from what I know, a pace setter manifold will work and there is one more that I can not remember.


both are good upgrades, but there is so much exhaust that can exit the motor with a constricted intake.

the intake does not only work with modified motors...it will net gains both ways.

go to the strokers.com website for good info on the '01 intake and headers that work with it.

 

so the 01 sounds like a good idea either way?
I was working up an exhaust plan for my 93 as well, sounds like I want to drop in an 01 intake too, RFB

 

do both at the same time.

 

Thanks for the info, I will check that website out.

 

Might want to read this article regarding 4.0L performance myth busting and the late model intake. They LOST 5hp on their '98 test mule.

http://www.jpmagazine.com/techarticl...ies/index.html

 

correct me if I'm wrong, but didn't the IDIOT with the xj who did that also have oversized tires on stock gears, and did the dyno test after that as well...


EDIT: you're also going by jpmagazine reports, which have time and again been proven not only to be simply misguided, but blatantly WRONG.

 

crazy not to do both at the same time... same gasket... come this weekend ill have a 2000 intake i could send ya... $60 shipped!!

 

i choose this over JP anyday...

http://www.mallcrawlin.com/forum/showthread.php?t=6355

 

...except that that guy stole half of his info from gojeep.


I'll trust ANYTHING gojeep says about a jeep tech. he could tell me amc20's were not available in 86 comanches from the factory (which they were).

www.go.jeep-xj.info/

his site is down for some reason right now.

 

well if they "plagiarized" from gojeep... then i deff trust it over JP... lol... JP should hire gojeep so they have "jeep" experiance... lol

 

they didn't exactly plagarize from gojeep, but they definitely used his tech, research on volum capacity of the intake, net gains, etc. and his pictures for the initial things like porting etc.

 

good info thanks guys

 

The issue have with those big dyno gain's are I am not sure what kind of dyno they used, and the dyno run's where like a month apart, I know in a perfect world the dyno's are supposed to produce the same results through corrections no matter what the conditions (temperature, barametric pressure and what not) but most of the time I have seen cars dyno very different numbers on different days with no additional mods to the car. Also I am confused a bit as to what gasket I would use if I went with a header if the intake ports are bigger or the exhaust ports are smaller, and it seems even with any header that would fit newer manifold (i am talking about the ones not made for new manifold as I only have 1 o2 sensor) it will still be bottle necked by 2" exhaust pipe after shorty header. I will probably just throw borla on and get exhaust all plumbed, then put manifold on at a later date, It's not that hard to remove. This is my daily driver so I don't have time for it to be down for a day or two while I figure out power steering bracket and what not, and my other car is in storage so I wouldn't be able to run to parts to to get anything I might need. I am sure it will be fine just doing exhaust now and swapping intake at a later date, but thanks again for all the info.

 

the intake swap isnt real hard and theres plenty of write ups... mine was hell cause i had renix stuff on a HO motor (not me that did it)... but see the guy with the wedgie pick above? if u get questions when u get ready... ask him and me... but i learned from him pretty much... lol