[Fot] CR

[Mike Munson]

I had one TR6 engine with .040 over cast pistons that I  ran at 14:1. The only
time I had problems was when someone put too lean a main jet in and I burned a
whole in number 5. I cut down the mosquito population that day at Road
Atlanta. I wear glasses now!
 
Mike 

From: marty sukey <trmarty at hotmail.com>
To: FOT <fot at autox.team.net>
Sent: Wednesday, July 20, 2011 10:14 AM
Subject:
[Fot] CR

What is the collective wisdom of the FOT masses as to how high of a
CR can be
run on cast pistons? This would be Spitfire FWIW.  I am at 10.8:1,
intentionally kept it low because of the cast pistons.  I have had a
discussion with an engine builder telling me I can go much higher.  I am
contemplating bumping up to 12:1.  Before I blow something up I thought I
would toss it out for discussion. What say ye?

Thanks,
Marty (one race in and
I already want to go faster) :)