QUESTION
12-16-2002, 02:06 PM
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QUESTION can someone post the forumla's for pulley size/rpm/blower rpm?
boost. how are ya'll guesstimating this? is there a rough formula for rpm and pulley size for a stock or otherwise LS1, etc?
also, whats the stock crank pulley size for the ls1 ati kit?
<small>[ December 16, 2002, 06:29 PM: Message edited by: Ryan ]</small>
boost. how are ya'll guesstimating this? is there a rough formula for rpm and pulley size for a stock or otherwise LS1, etc?
also, whats the stock crank pulley size for the ls1 ati kit?
<small>[ December 16, 2002, 06:29 PM: Message edited by: Ryan ]</small>
12-16-2002, 07:01 PM
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Re: QUESTION </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Ryan:
<strong>up</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I believe the stock crank pulley size for the ATI kit is 7".
Once you have that you can figure out the blower speed by dividing 7 by the blower pulley size. Then multiply by 4.11(internal step up ratio on the P1SCH and D1SC). Then multiply by whatever engine rpm you want to figure for.
(Crank pulley/Blower pulley) * 4.11 * engine rpm = Blower rpm
As far as how people are figuring boost goes, I think most are just going off of experience.
John
<strong>up</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I believe the stock crank pulley size for the ATI kit is 7".
Once you have that you can figure out the blower speed by dividing 7 by the blower pulley size. Then multiply by 4.11(internal step up ratio on the P1SCH and D1SC). Then multiply by whatever engine rpm you want to figure for.
(Crank pulley/Blower pulley) * 4.11 * engine rpm = Blower rpm
As far as how people are figuring boost goes, I think most are just going off of experience.
John