CLASS RACER FORUM - View Single Post

gsa612 · 09-17-2013, 02:47 PM

Something's not right, your trap rpm seems low with 4.56's, I don't know what cam you got. What's the spring pressure? I'm going through at 6700 with.56's with the 94'tire. Mine goes 11 teens on a average day with 1.45 60' in G.(with no ice or lw oil).I found on these motors because of the cyl. heads (105cc) and the lower piston dome require a different set up than a 325-396 in terms of total timing, jetting, cam position, usable rpm. I would try .88's on your car if the springs check out ok. On a side note NHRA's Danny Gracia ran a wagon like yours a while back(80's). I was going through teardown 20+ years ago and he gave me some good advice/tips on the 402 combo lol..

09-17-2013, 02:47 PM	#6
gsa612 Senior Member Join Date: Jan 2008 Location: 100th Meridian Posts: 569 Likes: 116 Liked 280 Times in 139 Posts	Re: Rear Gear Question Something's not right, your trap rpm seems low with 4.56's, I don't know what cam you got. What's the spring pressure? I'm going through at 6700 with.56's with the 94'tire. Mine goes 11 teens on a average day with 1.45 60' in G.(with no ice or lw oil).I found on these motors because of the cyl. heads (105cc) and the lower piston dome require a different set up than a 325-396 in terms of total timing, jetting, cam position, usable rpm. I would try .88's on your car if the springs check out ok. On a side note NHRA's Danny Gracia ran a wagon like yours a while back(80's). I was going through teardown 20+ years ago and he gave me some good advice/tips on the 402 combo lol..