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Tom Meyer · 11-30-2024, 03:15 PM

The 2002 j bodies came with both a vin 4 push rod and vin F OHC. The pushrod block is steel and comes with a roller cam and rockers with a heavy crankshaft. The OHC block is aluminum, crankshaft is lighter and knife eged and will turn more rpm faster. It also has 1 point more compression. On a wheel dyno OHC motor was 40 hp better. I feel the OHC motor was easyer to get hp out of. Also trans gear ratos are better with OHC stick . Tom

11-30-2024, 03:15 PM	#4
Tom Meyer Senior Member Join Date: Aug 2003 Location: Pierce NE Posts: 931 Likes: 73 Liked 351 Times in 120 Posts	Re: Brainfarting a combo The 2002 j bodies came with both a vin 4 push rod and vin F OHC. The pushrod block is steel and comes with a roller cam and rockers with a heavy crankshaft. The OHC block is aluminum, crankshaft is lighter and knife eged and will turn more rpm faster. It also has 1 point more compression. On a wheel dyno OHC motor was 40 hp better. I feel the OHC motor was easyer to get hp out of. Also trans gear ratos are better with OHC stick . Tom __________________ Tom Meyer 5240 SS Stock ??? Last edited by Tom Meyer; 11-30-2024 at 03:35 PM.