?re lotus TC header size

["christopher h. kang, MD" <chkangmd@earthlink.net>]

I  used a  header calculation program for an idea regarding header size 
for my TC racing engine that I'm having built.
I calculated 1.77" ID for a 12.5:1 compression and 7,500 RPM. Does that 
sound like what others are using?

christopher  

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