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Bob, that does seem large. For reference, the p port has two butterflies for a TOTAL of 4.1 sq in. This was based on calculations done by Rolf and should be good up to 8000 rpm. The size is similar to what Power Sport is using and what Paul Yaw has recommended. Jerry
Hi Tom,
I think there is a small error in your area calc. A = pi* r^2, so
A = 3.14*(2.5625/2)^2 =~ 3.14*1.28*1.28 = 5.15 sq. in.
I'm hoping to get the engine running pretty soon to get some idea of how
well it is going to work.
Bob White
On Tue, 15 Feb 2005 08:54:12 -0800 (PST)
Tom <tomtugan@yahoo.com> wrote:
So lets take your butterfly size of 2 9/16 inches.
Bobs butterfly area = (2 9/16 / 2) x 3.14 = 4.02 square inches
Max supported airflow based on their rule-of-thumb = 4.02 x 140CFM =
562CFM Max HP based on these (100HP per each 140CFM) = 402HP
The difference between the actual HP your motor will make and 402HP is
throttle-movement that would do nothing for you.
Here's the website:
http://www.dune-buggy.com/turbo/intake.htm
Still learning stuff,
Tom
http://www.bob-white.com
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