Dan,
I may be way off base here but this is a formula for just such a
dimension:
P=(AxSxD²)divided by(1400xd²)
Where as:
P= pipe length
A= degrees duration
S= stroke in inches
D= diameter of piston in inches
d= diameter of exhaust valve in inches
This was given to me a number of years back by JK Jackson. I'm
sorry I do not remember what the constant (1400) represented. The
whole formula may be TR6 specific...but I don't think so.
Somewhere I have a book with more math formulas then you can shake
a stick at, all automotive related.
Has anyone else seen this formula? Or did I just give away a
"Super Secret" proprietory information tid bit (sorry JK!) only
known to Irish rocket scientist!!! (Is there such a thing?)
Patrick McMullen in NC (Yes I have a brother named Mike)
I swear...NO whiskey was involved!
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