Compression ratio

[Direthought]

I didnt know where else to put these so

I've been searching for a while and havent gotten a good solid answer on this from google, askjeeves. . . etc

How high of a compression ratio can be run with 91 octane? Safely!

[AsheCb7]

all depends on turning but the most ive seen is 13 to 1 and if thats not believable just look no further than a toyota prius and then i know a few people in my area that run 12 usually is all motor streetable in the southern states but they usually have to dial their shit way rich

[AsheCb7]

oh yeah the prius also does this feat on regular 87 go figure