ZL1 factored HP and valve springs - Page 2

Alan Roehrich · 02-16-2015, 12:50 PM

I would never even fire that engine up with those spring pressures. Tim and I just talked, he and Billy Godbold are still saying 250 seat and 525 open. You will have serious seat bounce below 225, oddly enough, the exhaust seems worse. Every time I increased pressure from 200 on the seat, I gained torque, HP, and useable RPM. I gained 20 ft/lb going from 230 on the seat to 250.

I'd suggest 115.0 to 115.5 on the volume, that thing needs compression. I use Cometic gaskets, never had a head gasket problem.

I was with Kevin at the last Norwalk national event he ran.

Yes Jimmy is still running the white Corvette. Probably going to head south with it this week or next.

02-16-2015, 12:50 PM	#11
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,066 Likes: 1,486 Liked 1,630 Times in 378 Posts	Re: ZL1 factored HP and valve springs I would never even fire that engine up with those spring pressures. Tim and I just talked, he and Billy Godbold are still saying 250 seat and 525 open. You will have serious seat bounce below 225, oddly enough, the exhaust seems worse. Every time I increased pressure from 200 on the seat, I gained torque, HP, and useable RPM. I gained 20 ft/lb going from 230 on the seat to 250. I'd suggest 115.0 to 115.5 on the volume, that thing needs compression. I use Cometic gaskets, never had a head gasket problem. I was with Kevin at the last Norwalk national event he ran. Yes Jimmy is still running the white Corvette. Probably going to head south with it this week or next. __________________ Alan Roehrich 212A G/S