Honda compression ratios

Ok so I have spent all night on dseries.org and playing with this compression calculator. http://www.zealautowerks.com/dseries.html What compression ratio can be run on 93 octane?

depends on the tune.

So would ~11:1 with Bisimoto engineering Level 2 camshaft and a tuned Hondata S300 be do able on 93 octane provided the tune was done right and for that matter in anyway streetable?

^Easily. I've run 13.5:1 on 93 octane. Had to give up some timing, but that was also before E85 was readily available.

cams make a big difference. If the ramps overlap, they let some of the compressing mixture back out of the cylinder, effectively lower the compression ratio, so a "13:1" engine might actually be an "11:1" with a race cam.

Fiesta has 11:1 on 87.

Well hell I might go with PM3 pistons and ~12:1

I would... or even more, honestly.

Depends what head and if you're milling or not.

11:1 isn't even touching the limits of pump gas. Later Celica GTSs were like... 12.5:1 stock.

In reply to 92CelicaHalfTrac:

2ZZ-GE is 11.1:1

DaveEstey wrote: In reply to 92CelicaHalfTrac: 2ZZ-GE is 11.1:1

My bad, i fat-fingered. Not 12.5:1, but it's 11.5:1.

It'd be awesome if Toyota brought a 12:1 engine over to the states.

12-1 is pump friendly. I have 10 hard years of flogging on my built b18c. Go for it

DaveEstey wrote: It'd be awesome if Toyota brought a 12:1 engine over to the states.

I'd love to see a revised 2grfse w/ 12:1 or higher compression. I bet it would put out fairly insane power.

It would be on a Z6 with PM3 pistons, stock head gasket and .020" milled head. That would give me a compression ratio of 12.39:1.