Quote Originally Posted by FAYLUR
Sorry to resurrect an old thread but I have been digging for info. since this and can't find an answer either in books or on the internet.
My question concerns octane and high CR's.
What is the deal with octane limitations but race motors are running high CR's?
I have heard/read that race motors can run a DCR as high as 9.1:1 on race gas without problems,,,now does this mean that a race engine running 13:1 or even 16:1 has to design the motor to produce 9.1:1 DCR???
Is there really a DCR limit if using race gas???
What we have been doing on gas is 13.5 to1 or less 112 octane over 13.5 to 1 we use 116 octane.
If you run the higher octane gas with the low comp. engine I doubt you will see any hp gains.