What compression would be nice for E85 I currently have 8:1 and its apart at the moment

Whats the thoughts on bumping it up a bit?

Its for a yb in a track car.
Cheers

 

Has no one got thoughts on this?

I thought there would be a bit to gain even if it was just down to runnng less boost for the same power.

 

You wont get a straight answer that fits all applications for just on petrol as its not that simple let alone on E85.

If you beleive that 8:1 was optimum for your engine on petrol though, the same engine will probably work very well at 9:1 on E85

Or keep it at 8:1 and you can run some more timing.


Depends largely on how hard you are revving it, if its high rpm power you want, then higher compression is king.

 

Cheers Chip you made the decision easy for me. Im not chasing anymore revs so it will be staying as is.