I am clueless when it comes to compression ratio and the proper octane to run in in an engine.
In particular, I want to make sure I am running the proper fuel in my engine. I have ben running 100 octane, but would like to know if it would be safe to run as low as 91.
Below is the specs for my engine.
489 c.i.d. BBC Full roller motor.
.030" over bore
Scatt 4340 forged crank, 4.25" stroke
Splayed main caps /w ARP main studs
Eagle, 6.135" forged H beam rod's
SRP forged pistons/17cc dome volume
Block has been zero decked
Bullet Racing Cams solid roller cam
Morel pressure fed solid roller lifters
Cloyes hex adjust double roller timing set
AFR 325cc as cast aluminum heads/117cc chamber/ ARP head studs
(Head specs and flow chart. Air Flow Research
Crane gold rockers,1.8 int.,1.7 ex
Edelbrock TR2 tunnel ram
two 600 cfm Holley carbs
As good as the heads are I had a little more done to them. A little more port work to smooth out a couple bumps and a little shave to get a little more compression.
I am unsure of the head gasket quench, but the builder said it was knocking on the door of 11:1.
I also used the AFR intake gaskets which match the head's intake ports much better than the felpro and the intake has been portmatched to the head's.
Timing is set at 20* initial and 32* total.
Here is the Cam card with all the cam specs .