Might run E85.

Thanks.

 

You're going to have to clarify your question a bit. If you're asking how to achieve a 15 to 1 compression ratio, I'd have to ask why you'd want that.

 

to run that you would need more than e85..more like 114-118 octane or methanol

 

110 is enough but E85 isnt its rated around 100. Best way to up compression is pistons, but if your having to ask then your not ready to build a motor like that.

 

 

I was wondering what the cheapest way to achieve higher CC. I thought about having the heads milled, but going that high of CC will cause other issues. Push rod length, intake milling, ect.. (Cost)
Also on E-85, I've heard it will run as high as 19 to 1 CC. I want to make sure. I was going to start low and work up. So I didn't want to put alot of money in project that might change. One thought I had was buy pistons for a 12 to 1 CC, then if I decided to increase CC, I would mill the heads, or use a thinner head gasket. Also thought about getting pistons for 13.5 to 1, and using a thicker head gasket to achieve the 12.
Has anyone or know of any who runs an E85 purpose built motor?

Thanks.

 

i say do some more reading on ls1 style engines..

 

Why? Is there something I'm missing? That LS1s have a compression ratio of 11.0 to 1.

Thanks.

 

Actually its only 10.1 on the 5.7 LS1. Lower on the trucks except for the H.O. Alum block 5.3 and LQ9 6.0.

 

E-85 has an octane rating of 105. That's good for about a 12, maybe 13 to 1 if the tune is right on. It's still got 15% gas in it. NO way you could run 19-1 that's diesel territory. Where are you getting your information from?