intake/exhaust

[MonkUSMC]

I know a 4.10 gear would be the most beneficial to acceleration on my 2.5L 1986, but are there any GOOD cold air intakes and exhaust systems for a 2.5L 1986 Comanche/Cherokee? I've looked on google, Quadratec and 4wheelparts and came across just about nothing, except this one that claims 21hp 36ft/lb torque @ 5300rpm for the low price of $400 lol. http://www.racepages.com/products/?N=5565&Nr=OR(AND(make:Jeep,year:1986),AND(universal:1))&Vi=1557+4294965185&y=1986&mk=Jeep

 

Thanks,

LCpl Monk

[jpdocdave]

in my experience, there's not much to do to wake up that motor. for the money you're gonna spend, its not worth what you gain. imo if it doesn't have 4.10 gears, find gears/axles, and don't waste anymore money on that motor. i've had that motor, and its a work horse, and will last forever, but its never gonna make you happy coming off the line.

[MonkUSMC]

Yeah I wasn't expecting to get low 10's on the 1/4mi with that 2.5L but just wondering if getting intakes/exhaust systems would get a little extra power for the 33"s I'm planning on putting. If my D35 brake, I will get D44 4.10, but I'll just wait until its time for that. Thanks though.

 

LCpl Monk

[Pete M]

4.56s will make you smile. :D Maybe even 4.88s There is no amount of bolt-on 2.5L stuff that will make up for a lack of proper gearing. It's all a matter of leverage.

 

If you want to do something in the meantime, dumping the engine driven fan for an electric is supposed to be worthwhile. :thumbsup: And sometimes a rebuilt fuel injector can bring back lost life from the motor.

[bigd44889]

i have 31's on mine with 2.5 it is bored 40 over

30 inch glasspack no cat

a cone air cleaner up thru hood

3/55 gears

i have no prob. with mine

i can put it at 90 on flat hwy

offroads good rock crawls ok

will go 4/10's someday

so what i am saying is let it breath

33's get 4/10's :cheers:

[dakineJ]

so what i am saying is let it breath

:cheers:

 

Anytime you can get it to breath better,it helps.Even with a 4.0L ,gains can be modest with bolt-ons.So it's money vs. returns.Check out Summit Racing and Jegs websites for intake,headers,and exhaust.Do a tune-up with new parts.Oh,and dare I mention a Turbo, anyway...

carry on,Devil Dog

[dasbulliwagen]

When doing the Power steering/ air conditioning conversion on my 2.5, I found that I had ordered the wrong PS resevior, so I went in to the parts dept and grabbed a resevior from a caravan, and realized that the place I needed to mount the res was where the airbox was. Ive had this cold air intake I took off of a late model Mazda 3 a couple years ago, sitting around, so i decided to see if I could make it work. I found that removing the hose part coming off the top of the TB that the cold air tube adapter fit right to it, so I cut it to length, made a support for it and have been running it now for a few weeks. I don't really think it made any difference in power, but it seems to be a little happier/peppier in general though so who knows. I also have 3:55's and will be going to 4:10 with my 4x4 conversion very soon. I can't wait to what kind of difference it will make!