lol while you were away there was a lot of shitposting, but we also found the answer you are looking for.

Might be 10.5:1, might be 11:1, It's not yet known. If you can reach MBT at 11:1, that will be better. If you can't, 10.5:1 will probably be better.

 

dingdingding. The only empirical evidence I have is of one guy (eliminator77) who said that he did 9.5:1 and regretted not going higher. That's where I'm basing my 10.5:1 starting point for my E85 shortblock on.

 

Tork is functionally retarded.

 

 

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Not the highest no. But with a milled head/block and Weisco "advertised 10.5:1" pistons resulting in a calculated static CR of 10.87:1; I was able to reach MBT running 17PSI boost from a Positive displacement supercharger and C-16 fuel.

I can tell you that with pump gas this thing would prob make less power than a JRSC'ed Miata with a RRFPR due to limited timing.

It amazes me that some people have such a hard time understanding the simplest of concepts. Timing makes MORE power than Compression (or boost) when you are limited by the detonation threshold of a particular fuel. If you are no longer living within the limits of that fuel you can make more power by increasing compression(and or boost) and timing.

Obvious troll it obvious. Stop feeding them

Here's the spark map

 

Holy **** how much timing you have

With my 9.5:1 pistons I didn’t get any torque gains after 20-22deg. Here’s my E85 spark map