Do i need to get exhaust manifold,throttle body off donor,or will my 94 stuff swap?

 

Came across this.
http://www.jpmagazine.com/techarticl.../photo_10.html
Now i know what manifold looks like.
Ill install 703 injectors in stocker and get baseline performance.
Pick up later production intake next half of sale at yard.
Dont know about 10% HP gain but, looks better than aluminum log i got on now!

 

I've read that there are better results by using a heat barrier to reflect some of the exhaust heat away from the intake.

Like: http://www.summitracing.com/parts/DEI-010392/

 

Your exhaust and thottle body will work, but you may need to swap the power steering pump.

 

I have been running a 99 intake, 703 injectors, and apn header on my 97 for about a year now. 20-30 hp is way exagerated, but it definately picked up some throttle response and a few ponies. Though a big bore throttle body made a bigger difference. Just remember, an intake upgrade is worthless without an exhaust up grade.... the engine can only pull in as much air as it can put out. Since I have a 97, I did not have to change the way the power steering pump mounts. I just had to re-route a few vacuum lines, and extend some wires to reach the new sensor locations. You will have to modify the bracket that holds the fuel line in place, but that's not hard either.

 

Yes, you must swap power steering pump and mount on pre '96 models. I did a lot of research and have seen all different results. The 20-30hp improvements are on stroker motors with head work and the intake was ported too. Seems like on a bolt-on stocker they make up to 5hp. Jpmagazine lost 5hp doing the swap but I don't know what else they changed if anything and I've never trusted magazines. I'm doing the swap this week, lightly porting the '99 intake and adding a header and 63mm throttle body.

 

i just installed the 703 injectors, intake manifold, and borla header and jeep runs pretty rough.. putts when put it up to 2k rpm. could i have to reset computer somehow?

 

Yea, pretty sure you're supposed to when you swap injectors. Disconnect the battery for a while.

 

http://www.go.jeep-xj.info/HowtoIntakeManifold1.htm

Figure this link may shed some additional information on the issue.

 

Just changed the cat on mine with one of mudfrog's high flow cats yesterday... I was amazed how much better it ran... Guess I wasn't getting the full benefit of the intake and header and injectors before...

Like's been said before, you need to disconnect your battery for a bit, so that the computer resets and goes into learning mode for the next 50 starts.

 

I put the 99+ intake on my 95 Sport 2 years ago with the Borla headers, Magnaflo cat and muffler. It did give a definite low end boost, but no where near 20hp. For 95 and older you have to get the power steering pump, idler pulley, and a new belt. Your old belt will be too long.

 

I just got a 99 mani for free and was thinking about popping it on my lifted DD 98.

I have a magnaflow high flow cat and thrush welded muffler and am running 2.5 all the way to the pre axle dump.

If I keep the stock injectors, will I still see a performance gain? I am looking get a little better mpg. Also I will be moving to higher altitude (from 500ft to 5000ft) in a few months and was curious if this would help make more power up in the Rockies?

 

Have you guys lost your minds ? You are all wasting your money !

Here's JP Magazine's Input:



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

 

Got mine free

 

Jp's results were already mentioned. Maybe you should read a little before losing your mind. Jp is not the god of all performance mods for your cherokee. Just because they claim to have lost 5 hp doesn't really tell you anything. I don't see anywhere near enough information in the article, or a dyno sheet. The theory you have bolded about velocity is completely backwards further proving they are morons. Just because the intake has a greater overall volume doesn't mean lower velocity. It has a greater volume because of much longer runners. Long runners = more low end power. The actual size of the runners is smaller which makes for higher velocity which also = low end power. These Ho motors are quite the dog down low and really don't move til you rev them. The idea of the intake is to move the power curve down. It's not about how much horsepower you make, but where you make it and if It's useable.