Originally Posted by Black Hills TJ
What cam would you suggest to run in a 4.0? I'm swapping a 4.0 drivetrain from a 99XJ into my TJ, and I want to at least do a cam while the motor is between the two Jeeps. I can't afford a stroker.
Mike, we met at JEEP Camp. You helped me out with the 8.8 axle-shaft break. I just replied to another thread that's on right now, that's kind of talking about the same stuff (head, cam, lifters ?'s). This is kind of a beware of what you wish for, in other words sometimes just trying to do a cam or something like that can start a chain-reaction of items you will have to address. Since my typing skills suck, I'll just clip and paste it here for you!
"Jake, I would recommend staying stock with just a better cold air intake or go straight to a stroker or V8.
Believe me when I say this recommendation comes from a ton of experience.
I thought the same thing as you and wanted more ponies for the added weight that had got put on the JEEP and the fact that we live at 5300' elevation.
We also drive our rig to trails (no trailer queen here) with 33" AT's pulling an enclosed 4X6 trailer that has our off-road tires/wheels and camp gear for extended trips (Moab, Rubicon, Black Hills, etc.), combined weight is right at 7000#'s
I started with a better cold air, then went with a High Flow exhaust system (Header on back), this caused me to lost back pressure which in turn meant that I lost some low-end torque. Next was a 2000+ intake and a 62mm T.B. and I noticed a little difference. Now I decided to boast the spark with a Fire-Power kit and I started to burn down stock plugs that were not really designed for the .060 gap and the jeep just runs OK for the added $.
So I keep reading and find that everything shows that the stuff I've added will all work so much better if I open up the restriction (The Head) and just stuff some $ at it to get better flow, here goes another $600.00 in machine work but it now flows 20% better (big #'s on the flow bench). And with all this new found flow I went with a Stage-2 Mopar Performance cam (to get back some of that Low-end torque), double roller chain and gears, HD Mopar Perf. rocker arm assemble and had to have Custom push-rods made.
Now it needs more fuel so off I go and get 21# injectors, but can't get enough fuel through the regulator to get the injectors to work right. I'm sure Hesco has My C/C # on file with how much I've purchased from them (hence an adj FPR.), now the pump will not give enough to make it work and I order a 255 Welbro pump.
Are you starting to catch my drift as to how you can be opening a bucket of worms here.
Now a lot of people will tell you that you can just bolt some of this stuff on and it's not that hard to get it to balance out (the PCM will adj for it), lets put it this way- "Ignorance is Bliss!"
I'm not trying to throw stones at anyone, I'm trying to say that I have the equipment to test and the knack to see if it is running to it's potential and I'm neurotic about that type of stuff!!
The only reason I did not go with a STROKER is that here locally there had been quite a few stroker failures.
I thought going this way would be less work/$, I was very Wrong and I didn't even list many of the supporting parts that were needed .
Now if you have the patience of Joeb, some (OK a lot) of cash, the desire to have something different that Runs GREAT, you can try my path and I can definitely help you thru this.
And in case you want to know how it runs, here you go:
Mike Good luck with it, Randy