Max compression pump gas
AMP Racing
Joined: Aug 2006
Posts: 10,755
Likes: 589
From: Washington TWP NJ
2023 C5 of the Year Finalist - Modified
2017 C5 of Year Finalist
St. Jude Donor '09-'10-'11-'12
91? or 93?
I would say probably 12:1 depending on the parts and how much timing you throw at it. The tuning window will be relatively narrow, so make sure you have a skilled tuner working with you.
Good luck with your build.
I would say probably 12:1 depending on the parts and how much timing you throw at it. The tuning window will be relatively narrow, so make sure you have a skilled tuner working with you.
Good luck with your build.
Melting Slicks
Joined: Jun 2002
Posts: 2,591
Likes: 144
From: Mobile al
I ran 12.5 to 1 in a second gen LT1 on 93 octane.
You need a really tight quench and a good bit of overlap to bleed off cylinder pressure at low speed.
You need a really tight quench and a good bit of overlap to bleed off cylinder pressure at low speed.
Last edited by FASTFATBOY; Aug 1, 2016 at 11:59 AM.
Safety Car
Joined: Mar 2005
Posts: 3,756
Likes: 1,215
From: Wisconsin
If you keep the dynamic ratio at 8.5 or less you can run 91octane,
8.5 to 8.7 93 octane, with the higher static ratios, plus good tuning, and other factors. Lots of good info on the forums on how to do this.
8.5 to 8.7 93 octane, with the higher static ratios, plus good tuning, and other factors. Lots of good info on the forums on how to do this.
Last edited by feeder82; Aug 1, 2016 at 11:58 AM.
