Daily driver 4.7L cam?

[Rinkrat456]

For those of you who have been following my other thread regarding the 3000 RPM limiter and horrible detonating, my wife and I are leaning towards scrapping the OBD1 cam that's currently in the 4.7 and switching to something else.

Trouble thread:
http://www.jeepstrokers.com/forum/viewt ... f=5&t=4261

98 XJ 4 door AW4
Spark notes on engine build parts:
-'97 Cherokee NVH block & Head (block freshened up, bored 0.060 over, decked for almost 0 deck, new cam bearings installed.... head rebuilt with stock valves, new guides and new seals, stock springs)
-3214723 casting number stroker crankshaft from a '78, which makes this the heavy 12ctw long nose version and we cut off 10mm from the snout
-'97 long rods
-Icon 944 0.060" over Forged pistons
-1987-95 4.0L camshaft, Melling part number MC809 (adv duration 270in/270ex, duration @ 0.050 197in/197ex, lift .397"in/.397"ex, LSA 110/114, ICL 112)
-Napa high volume oil pump (massaged pan a bit to get it to fit)
-LS6 26lb injectors
-Stock exhaust header, stock downpipe, cut off cat and OEM muffler for a straight pipe feeding into an 18" oval Magnaflow muffler w/turn down
-Stock intake
-'98 ZJ 136 Amp alternator with smaller pulley

Since we have no reasonable way to check the current cam that's in the engine now to make sure it was ground properly, we've started seriously thinking about ordering a new cam from somewhere and tearing the top end apart.

Do you guys have any recommendations for a '98 cherokee on 35" tires, 4.30 gears meant to be a reliable daily driver and weekend warrior in this 4.7L? Looking for reliability, great torque, decent power from the added displacement and if possible decent gas mileage that will work on the stock computer for awhile until a tuning solution can be figured out.

[6TIME]

Lunati 63500. I do alot of towing....Very impressed with the low end, pulls to the rev limiter, and I can get almost 20mpg on highway trips. It's quiet as well.... 5 speed, 3.73's and 31's 2200rpm @65.

[IH 392]

Why did you put an OBD I cam in an OBD II vehicle??, my dyno simulations show the OBD I cam only slightly better than the SMOG 258 cams??, if it was so good why did Chrysler stop using it!??

[RenoF250]

You can check the cam with a degree wheel and a micrometer on the rocker arm.
http://www.summitracing.com/parts/cca-4902/overview/

[Rinkrat456]

Why did you put an OBD I cam in an OBD II vehicle??, my dyno simulations show the OBD I cam only slightly better than the SMOG 258 cams??, if it was so good why did Chrysler stop using it!??

My guess...emissions. Looks like we had this discussion already. http://www.jeepstrokers.com/forum/viewt ... =15&t=3946

I used the Melling MC809 because of it's specs, the overlap bled off some of the compression of this engine...so the calculators calculated. I still think this cam has merits, but we're just not sure if it was ground correctly so it's time to change.

Also, for those of you running aftermarket cams, how many miles do you have on your engine now?

[FlyinRyan]

I usually recommend something in the 220 @050 range, 108-112 LSA.