PseudoSport

Last year we made 201 hp and 263 ft/tq (red graph) with a tiny intercooler and 7 psi tapering to 4-5. New numbers are after the upgraded intercooler, more timing, and 12 psi boost! The low RPM numbers suck since the dyno didn’t want to apply load that low but we hit 12 psi by 3000 RPMS on the track. Also note that these are STP #'s and will be about 4% higher then SAE.

240K mile 4.0L with a 50 trim T3T4 turbo at 12 psi. 274 hp / 322 ft/tq




Pic from the intercooler test fit.

BrandonSS

While the power is impressive... I'm more overwhelmed by seeing such a clean XJ engine bay!

Nice work!

XJwonders

Holy shot the engine is incredibly clean!

98cherokee531

X2 on that one, I'm jealous

Battle

Good lord that's some good power especially considering the internals are OEM.

Do you have any dyno vids?

rav

X3 I thought you said it had 240K on it, what's the secret

PocketsEmpty

Nice!

That engine bay is slick...

DieselD

Funny how he posts pics of a turbo'd 4.0 with some decent numbers and all everyone can say is "damn that's a clean engine bay" lol. Must be a Jeep thing.

That intercooler is almost bigger than the radiator, does it still cool good enough? Nice routing on the plumbing BTW.

PseudoSport

Thanks. We got lucky with how clean this Cherokee was. It was originally from down south and had zero rust. We pressure washed the engine, painted and installed a 99+ intake, and did a half *** wire tuck and touched up the engine bay with some Home Depot $0.97 paint. The engine bay of my Comanche is a disaster in comparison.

We were worried about airflow to the radiator but when we raced down in Florida it never got too warm. I have the fans programmed to come on at 180 and turn off at 170. Date logs show it never got past 189 all weekend. We’ll have to see how it does this summer.

The intercooler and pipes are a snug fit. It would have been easier to mount it inplace of the bumper or below it but i wanted it to fit behind the stock gill and keep the front end looking clean.

We're happy with the power since we have less then $350 into the turbo, manifold, injectors, intercooler, pipes, couplers, and engine management.

DieselD

Less than $350?? Tell me more. Any price breakdowns/parts list? I'd venture into a turbo at that price.

PseudoSport

Here's a picture from the $2013 GRM Challenge a few weeks ago. We have some vidoes posted on our facebook page and are hoping to add a few more soon.



We placed 3rd over all and first in the autocross for the second year in a row. Our fastest drag time was 12.9@100 mph at 10 psi

PseudoSport

It was mainly shopping around and finding deals on used parts which is the hardest part since we are working within a budget.

Quick rundown

Turbo is a 50 trim t3t4 form ebay for about $140
Intercooler was $76 on ebay
Intercooler pipe kit came with an intercooler, bov, couplers and pipes. We used what we needed and sold off the rest to zero out the cost.
Engine management is a megasquirt MS1 that was used from a turbo Miata for $100. It came with a stim which we sold and then modified it to work on a jeep.
Injectors are from a supercharged GM 3800 for $20 from a local junk yard.
Oil line is 3/16 brake tubing
Drain hose is 5/8 oil resistance silicone for $11
Drain pan fitting was about $5
BOV from a turbo Saab $2 junkyard
Free cracked renix manifold was cut and welded to fit the turbo. (this has already cracked and been repaired once)
Oil catch can was made out of an old shock tube

Big thing that doesn’t count in the budget is the time it takes to make everything work together.

investinwaffles

Damn thats quick for an XJ!!
Have you done any head/internal work?

Heads + cams bumped my power by 70HP in my Mustang (only a 2v as well), and on 14PSI I made 650hp/710lb-ft or so with a 72mm turbo.

Meth allowed me to advance timing even more, and add boost (17psi race tune), PLUS it lowered my EGTs considerably. Barely cost me $350 to piece the kit together with a cheap window switch.

I <3 Meth