4 digit 4.0

[89 MJ]

Newcomer has done it again. This time with a 1000+ horsepower 4.0. I’m impressed. 

 

[Eagle]

What I love is that he's NOT using the new-style, lightweight crank. Yes, it's aftermarket, but the original Jeep engines in this series (the 199, 232 and 258 c.i.d.) all had seven counterweights on the crank -- one between each connecting rod journal. Jeep reduced that the four counterweights in the interest of reducing reciprocating mass. I've always felt that was a mistake -- especially when at the same time they wanted less noise and vibration. The seven counterweight crank runs much smoother.

[Salvagedcircuit]

Man this guy's got it. Dang. If I ever had the budget to make a stroker street comanche, I'd definitely get an engine combo from him. crazyyy.

[Car Enthusiast]

Bonkers! I am surprised he is running that through a stock block and an off the shelf head

 

[AeroNautical]

Keith built my brothers stroker for his XJ and featured it in a video. He's ridden in my Comanche to help diagnose a hesitation, then sold me some dirt cheap injectors to fix it. He's a good dude. 

[pizzaman09]

It's an impressive build.  I'm amazed that it's stock bearings and block, basically it held together with 1000hp.  

[speeding_infraction]

On 2/4/2024 at 1:21 PM, pizzaman09 said:

It's an impressive build.  I'm amazed that it's stock bearings and block, basically it held together with 1000hp.  

And I would venture that the block is not the weak point, especially at only 4.6l. I think with properly tuned efi and a bigger cam you could make North of 1200hp

[Swampy]

Things like this make me question if i truly want to get rid of the 4.0l in my mj. I don't want 1000hp but like 250-300 would be nice mainly cause of the highway. my doubler takes all the work offroad but on the highway 65mph+ its a workout. 

 

I havent fully decided what to do yet

[Eagle_SX4]

Here is the tear down of the engine video was posted 2 weeks ago.

 

 

 

Crazy how well it survived.

 

[speeding_infraction]

One day he will crack 2000hp with one of these. Probably not soon but it can definitely be done.