strech117

i am about halfway through my first 4.0l rebuild. everything is off getting machined, and i took a look at the kit i bought for my rebuild and noticed that the cam i got is a performance cam shaft. which is only a good thing. except i cant seem to find out if i need to adjust anything in putting the new cam in.
the product number is

Gorillaxj

you need to get new lifters if you don't already have them as they lifters wear into a cam and should stay with that cam....

But the lifters are hydraulic and are self adjusting so you shouldn't have any problems. there is no adjustment just a torque spec for the rockers.

kram

I would degree the cam to make sure that they did not give you they wrong one

Cybershot

Hey

I just build my stroker with exactly this cam.

First, good choice! it is the best and reliable cam which have been used from many stroker builder!

Secound, if you want to keep it reliable for the next 100.000 miles, you will need also new valve springs, retainer and keeper. The new cam will push the valves much faster and the springs shall be able to close them faster and to baer heavier forces from the cam. Also I recomment you to buy roller rockers, because the original "pressed steel sheet" design might not be able to take the force for an long time.

Push rods and valves are no issue. DON'T go for Pro comp springs!!!

This you need:
12 Valve springs: http://www.summitracing.com/parts/DCC-5249464/
Mopar Performance P5249464

12 Valve spring retainers: http://www.summitracing.com/parts/DCC-4452032/
Mopar Performance P4452032

12 Valve keepers: http://www.summitracing.com/parts/DCC-4529218/
Mopar Performance P4529218

This you schould have:

12 Roller Rockers. http://www.summitracing.com/parts/CSP-S40196/
Harland Sharp S40196

dirt5track

has anyone run this cam in California and been able to pass a smog check?
I am building my 4.7 now and this seems to be the only cam i can find with a chance of passing a smog check.
thanks

strech117

i should be able to run just stock lifters right? with this setup your suggesting.

Cybershot

Yes right. THIS roller rockers are 1to1 replacement for the original ones. No need for other push rods or anything else.


I have no expiriance with the smoke test in California, but I checked the O2 measure from my 4.7 and it was better then the 4.0 with 80k on it. What they measure there CO2? O2?

fannitti

What year xj is this set up ur doing going in? I have a 89 and looking to do the same came and was trying to find springs and all the other good stuff with it also.

Outlaw Star

Old post fan, but it was a 1991 Engine. Good news for you, the links still work for these parts.

fannitti

Yea trying to figure out what I'm going to do. Prob going with a hesco cam and springs and all the goodies for my 89.