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Be weary. You know what I put in my engine? Oil. Nothing more. Nothing less. Last time I used seafoam my engine spewed a head gasket. Then I gave it a second chance and tried again and used it in the vacuum lines and injectors. Clogged them to hell. This is my experience. Others may swear by it...

Good to know. I settled for the 505 performance race head they make with 5 angle valve job and larger valves. Works well with the stroker kit and the turbo kit.

If you want cost effective modding for the 2.5L I have the stroker kit from 505 (2.9L) and race head, and the turbo kit with the gale banks water to air inter cooler kit. I've got the ax15 swap and Dayna 44 axles up front and an 06 rear axle assy with a locker (comes with 4 wheel disc and 44...

It's been a long time since I've been on here.

That's the point. Haha but I'm still curious about the motor head swap idea.

Lol just thought it would get some attention. Maybe turn a few heads. :-P

So like many of you I've dabbled with the 2.5 motor. I've got my extreme build which is an utterly pointless ideal to some but I can still scream down the road with the rest of them. However on my other motor I was curious if I can Frankenstein an amc v8 head to the 2.5? Any input if they mate...

Cool, the supercharger is a roots style I'm unfamiliar with the other terms. But the turbo I've seen on a 4.0 and it was mean even for stock internals. I'm sure with an electronic boost controller I could run it up to 1bar off-road and then for highway tune it down to a half A bar for...

I chipped mine and did the other mods to run it, and its not enough of a gain to feel it in the seat... Slight mpg gain but not a huge difference...

Cool! thanks a bunch! i needed this info very much! the plan is to practically rebuild the whole truck starting with motor and then trans down to axles and then bigger tires. i needed this because my ax5 did quit on me, so im upgrading...

Well what are you suggesting i need then?

Allrighty, so come tax season I'm buying a new ax15 or rebuilt one, the motor is a 2.5L stroked to 2.9L forged internals gear drive timing with a stage 2 stroker cam and stronger valve springs with port and polished head and intake manifold, 65mm th and spacer plate, and tuned ecu, promotes 225...

I had a hard bucking problem turned out to be my crank sensor failed. Causing hell on my motor.

So I've got my tj, and a 2.9 stroker, comes with a healthy cam and forged guts, now for my boosting options I have to modify a supercharger from avengers from the 4.0, or should I get the turbo kit? Which one would be better? Cause the supers loose cooling performance on the intercoolers and...

I checked them out and it goes to a bad page...

I'm gonna check them out. But I appreciate the input, and I'm glad theres more out there that get it. :)

I've got the 2.5L and a Pacesetter header, and a stock cat, and a flowmaster 40 series single in dual out. It's obnoxious loud. But you can piece your own together as such. The flowaster wouldsound better after my new high flow cat and supercharger. But I'm gonna go back tp header, high flow...

When I'm done with building the motor I'm going to boost it with either a supercharger or turbo kit I found. And I found a local shop willing to performance tune it. It's all about showing people you can build them and make something different. I just want to do it this way. Also if I get a...

After the motor build I'm going to be boosting it with either a supercharger kit or turbo. And I found a shop near me that can performance tune my computer.

i just might do that, but in theory wouldnt i get more speed from a newer trans or at least the availability of a short throw shift and a dual friction clutch option? also the ax15 has interchangeable parts with the trans from the 2jz motor, so if you hybrid certain parts you could essentially...