Re: Aluminum 4.0L Cylinder Heads
Originally Posted by Ironman7
I am in the process of beefing up my 4.0 in my 04WJ but if you are looking to make big power numbers the best way historicaly is cubes. Get a bigger motor. From what I understand it seems there are a few turbo and supercharger setups out there for the 4.7 V8. I agree with everyone else. That is way out of whack for the CLAIMED HP gains. It works out to be about $67 a HP...that is pretty steep. I bet you could find a 4.7.
After a quick search I could buy a 4.7V8 HO for just about $2k...intersting...So you now get a motor that jeep/dodge claims makes these numbers:
Engine Power (SAE net):
265-270 BHP @ 5100 RPM
Engine Torque (SAE net):
325-330 LB-FT @ 3600 RPM
Niw your 4.0 makes what a claimed 195 horsepower, 230 lb.-ft. of torque. Now by my calculations you just spent about $29 a horse....much much more reasonable. You also gained about 70hp and about 95ish lb/ft of torque. Thats a pretty significant gain for a fair price per horse.
If you have $2k plus sitting around maybe this is the better route to go.
Well first I need 2000 in extra cash to throw away but they do look nice its probaly cheaper (and simplier)selling and going to a 4.7 H.O. or a stroker.
2002 White Grand Cherokee Larado 2WD - 4.0L Performance: K&N Cold Air Intake 57 Series, Magnaflow Exhaust and High Flow Cat, Airaid Throtlle Body Spacer. Exterior: Black Bull Guard, Black Side Steps, Black Rear Bumper Guard. Interior: Nothing at all just my good ole black leather seats. 2 inch BB on 265/70/17