07-10-2007, 05:57 AM
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CC Member
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Join Date: Jan 2001
Location: Sunbury,
VIC
Cobra Make, Engine: Rat Rod Racer, LS1 & T56
Posts: 5,391
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Not Ranked
I spoke with Darren Difillippo when I decided to build mine and he recommended 1 7/8" based on what I planned to do with the motor. Back then most people on the forums were recommending 1 5/8" or 1 3/4" for stock engines. In recent years as the tuners have got the feel of these motors the primary and collector sizes have been gradually increasing. 1 7/8" is pretty popular now and I think Darren saw that coming with the requests he was starting to get from tuners.
Cheers
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Mike Murphy
Melbourne Australia
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