Project: Keepin' it clean
Senior Member
Joined: Nov 2012
Posts: 523
Likes: 0
From: Plymouth CT
Year: 1988
Model: Cherokee
Engine: 4.0L
.....i thought we had maxed out the blower with the smaller pulley?... lol i vote 50-75shot nitrous. lmao. 
It was handling 11-12psi boost just fine. Lol. And it ran great. Pulled like a freight train. Lmao.
12psi boost GOOOODDDD. 12.5psi boost BAAAADDDDDDD (on stock head gasket). Lol.
At least we know the limit of a stock 4.0 now. LMAO. XD
better head gasket is definitely what we're going to put in.

It was handling 11-12psi boost just fine. Lol. And it ran great. Pulled like a freight train. Lmao.
12psi boost GOOOODDDD. 12.5psi boost BAAAADDDDDDD (on stock head gasket). Lol.
At least we know the limit of a stock 4.0 now. LMAO. XDbetter head gasket is definitely what we're going to put in.
No we are at 25
Well that is a good note, and I am digging how your jeep sounds I have watched that video like 6 times
CF Veteran
Joined: Sep 2009
Posts: 6,322
Likes: 6
From: Summerville, Ga
Year: 1995
Model: Cherokee
Engine: 2.5 4 cyl.
That is a lot of boost just sayin, almost at the diesel world. The cummins was running around 18 psi of boost when we first got it then some adjustments happened
No we are at 25
Well that is a good note, and I am digging how your jeep sounds I have watched that video like 6 times
No we are at 25
Well that is a good note, and I am digging how your jeep sounds I have watched that video like 6 times

Senior Member
Joined: Nov 2012
Posts: 523
Likes: 0
From: Plymouth CT
Year: 1988
Model: Cherokee
Engine: 4.0L
Thread Starter
Senior Member
Joined: Nov 2011
Posts: 795
Likes: 0
From: Snowville, PA
Year: 1998
Model: Cherokee
Engine: 4.0 I6 torque monster w/ a supercharger
That is a lot of boost just sayin, almost at the diesel world. The cummins was running around 18 psi of boost when we first got it then some adjustments happened
No we are at 25
Well that is a good note, and I am digging how your jeep sounds I have watched that video like 6 times
No we are at 25
Well that is a good note, and I am digging how your jeep sounds I have watched that video like 6 times

Thread Starter
Senior Member
Joined: Nov 2011
Posts: 795
Likes: 0
From: Snowville, PA
Year: 1998
Model: Cherokee
Engine: 4.0 I6 torque monster w/ a supercharger
CF Veteran
Joined: Nov 2011
Posts: 2,433
Likes: 6
From: Northern MN
Year: 1990
Model: Cherokee (XJ)
Engine: Renix 4.0
Originally Posted by bpas328xi
I like it a lot. The shifts are firmer and it feels like there is a more positive engagement of the gears when it shifts. I definitely recommend it.
Thread Starter
Senior Member
Joined: Nov 2011
Posts: 795
Likes: 0
From: Snowville, PA
Year: 1998
Model: Cherokee
Engine: 4.0 I6 torque monster w/ a supercharger
Thread Starter
Senior Member
Joined: Nov 2011
Posts: 795
Likes: 0
From: Snowville, PA
Year: 1998
Model: Cherokee
Engine: 4.0 I6 torque monster w/ a supercharger
CF Veteran
Joined: Nov 2011
Posts: 1,122
Likes: 0
From: Manchester, N.H.
Year: 1995
Model: Cherokee
Engine: 4.0 HO
I LOVE this XJ BTW....that whine...MMMMMMM
CF Veteran
Joined: Nov 2011
Posts: 2,433
Likes: 6
From: Northern MN
Year: 1990
Model: Cherokee (XJ)
Engine: Renix 4.0
Thread Starter
Senior Member
Joined: Nov 2011
Posts: 795
Likes: 0
From: Snowville, PA
Year: 1998
Model: Cherokee
Engine: 4.0 I6 torque monster w/ a supercharger
Haha. Thanks!!
I seriously can't wait to get her running again... Hopefully I don't find any nasty surprises when I take the head off.. 
So worth it. Lol. I highly recommend having a good transmission shop do it though.
I seriously can't wait to get her running again... Hopefully I don't find any nasty surprises when I take the head off.. So worth it. Lol. I highly recommend having a good transmission shop do it though.
Junior Member
Joined: Dec 2010
Posts: 84
Likes: 3
From: SOMERTON ARIZONA
Year: 2000
Model: Cherokee
Engine: 4.0
I purchased it but sold it cause I read that it holds 1st gear and that you have to shift to 3rd and I didn't want that. So does the gear hold 1st? Or is it the original way from the factory just firmer please let me know



