The Mud Pit > Wrenching

Redline

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gearhead1985B:
I know a stock 4.0 will throw a rod at about 6K so why would you want to extend the redline untill you on the virge of catostrofic failure and a 4.0 will make max power at 4500 so i think it is better to play it safe and  leave the red line where it is at stock IMHO there is no real gain in increasing the redline rpm

Flex:
I agree with Adam ppl smarter than us put it where they did for a reason

zjchef25:

--- Quote from: Flex on March 11, 2011, 09:44:06 AM ---I agree with Adam ppl smarter than us put it where they did for a reason

--- End quote ---

i second this

kirksjeep:
Mustangs make horspower at high RPM, Jeeps make torque at low RPMs.  Unless you plan to drag race your Jeep, I can't see a reason to go past the red line.  Off Road I rarely make it over 3500RPM, now Rock on the other hand.....

NV4500 all the way.  The AX-15 is a medium duty transmission.  On my list of future upgrades.

Swagger:
I think the point of my question might have slightly been under explained. Its not the horsepower i was actually after. It's more of a "how do i get a larger range of safe operation out of my motor" type question. I understand the whole horsepower vs. torque thing. but what i was wondering was more along the lines of a range of motion type deal. with a manual tranny, its not such a big deal, but with the auto, i just cant seem to get to comfortable with the fact that at highway speeds, i'm bouncing 2500 rpm's. It just feels like if there were more room for the motor to safely run its power band, then it wouldn't be as much of the load on the engine. i dont know at this popint. maybe i'll just shut up and do a tranny swap and get it over with. plus having the NV4500 in there, will definitely make the Cummins swap down the road a little less painful. Maybe by about 5%. ;D

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