formula for procharger RPM

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01-18-2007, 06:35 AM

lmt0705

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formula for procharger RPM

can someone tell me the formula to figure out my D1 rpm? Thanks!!!

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01-18-2007, 01:08 PM

ty_ty13

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7.625/ BP x 4.1 x motor rpm

CP/BPxstep-up ratioxrpm

mine is
7.625/3.4 x 4.1 x 6600 = 60,680 impellar rpms

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01-18-2007, 01:51 PM

lmt0705

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is 7.625 the size of the crank pulley? what is the 4.1, how much boost are you seeing with that impeller speed. thanks!

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01-18-2007, 02:16 PM

andereck

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4.10 is the internal stepup ratio of a P1SCx or D1SC. 7.65 is the 8 rib crank pulley and 5.82 is the 6 rib crank pulley.

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01-18-2007, 03:23 PM

ty_ty13

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Quote:

Originally Posted by andereck

4.10 is the internal stepup ratio of a P1SCx or D1SC. 7.65 is the 8 rib crank pulley and 5.82 is the 6 rib crank pulley.

is it 7.65 or 7.625 for the 8 rib?

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01-18-2007, 03:24 PM

ty_ty13

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CP= Crank Pulley
BP= Blower Pulley

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01-18-2007, 03:45 PM

andereck

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7.65".

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