E85 with higher compression motor

[huckleberry_hound]

We’re running e85 on our ct525 and had a guy ask if it will run ok on a higher compression motor, he has a 700+ hp 13 to 1 comp. Anyone doing this?

[hpontap]

Too many variables to get into it on here. With the cam timing and cylinder pressures, you can run into problems if not thought out correctly.
His best bet is to get with his engine builder and cam designer and work out the cylinder pressures throughout the rpm range the engine is seeing. But yes, it can be done.