"JGalban via AviationKB.com" u32749@uwe wrote in message
news:714b95624358f@uwe...
Matt Barrow wrote:

And what is the threshold for compression ratio?

Why does my current 7.5:1 CR still need 100LL when my older 8.5:1 did as
well?

Sorry, I must have missed this post over the weekend. Is your current
engine turbocharged? I'm scratching my head trying to come up with a
7.5:1
engine that requires 100LL.

TSIO-550C

--
Matt Barrow
Performace Homes, LLC.
Colorado Springs, CO