What fuel (octane) should this run??

[502SS]

427ci SBC
13.5:1 compression with Brodix -11 heads
272/284 [email protected] .704 lift in/exh 108 centerline solid roller cam
Right now, it's running 110 with 30-32 degrees of timing. He's looking at buying a barrels of 110, 112, or 114 to have on hand. We're going to get a little more aggressive this year with it, so I want it to be safe when the timing starts going up.

 

[90_Notch]

114 or 116. I'm gonna run 116 in mine at 14.5:1. A buddy of mine has a simular setup he notices a diffrence between 110 and 114. and his car won't start on pump gas.

 

[QuickLX]

It really depends on several things, but with 13.5 to 1, you should be fine with VP C12 or C14. If its an N/A car, you could run VP CMP (Oxygenated). You want to run the lowest allowable octane.

FWIW, I have 14:1 compression, and it will see every bit of 7700+ RPM. I will be doing my base tuning with C12, and then running CMP for a few more HP.