4.0L HO Jeep Engine Build
Well crap, I'm pissed off. I assembled the head (all cool there after setting spring installed heights) and started to degree the cam. The numbers I was getting were way off what they should've been. After I had everything written down I did a little comparison and found that the Sealed Power 4.0L HO stock replacement cam I purchased is nothing more than a cam for a early AMC 4.2 with 4 degrees less duration than the HO cam and .005" less lift. Timing events are way different too and this cam centerlines at 110 degrees vs. the 120 of the HO. Here's a comparison:
Oh yeah, this cam I have has a bit more lift than it shows under the 4.2 column, I measured .4195" vs. the .3950" inches they show. I'm debating on getting the Lunati or just blowing it off and going with what I got. It does centerline at 110 so I won't have to muck with that but I'm betting that Lunati would show some nice gains with the porting I did. On the other hand, that 4.2 cam should run great below 4K... :disgust:
Well crap, I'm pissed off. I assembled the head (all cool there after setting spring installed heights) and started to degree the cam. The numbers I was getting were way off what they should've been. After I had everything written down I did a little comparison and found that the Sealed Power 4.0L HO stock replacement cam I purchased is nothing more than a cam for a early AMC 4.2 with 4 degrees less duration than the HO cam and .005" less lift. Timing events are way different too and this cam centerlines at 110 degrees vs. the 120 of the HO. Here's a comparison:
Oh yeah, this cam I have has a bit more lift than it shows under the 4.2 column, I measured .4195" vs. the .3950" inches they show. I'm debating on getting the Lunati or just blowing it off and going with what I got. It does centerline at 110 so I won't have to muck with that but I'm betting that Lunati would show some nice gains with the porting I did. On the other hand, that 4.2 cam should run great below 4K... :disgust:
