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turbophil · 08-25-2008, 03:43 PM

I hope I'm wrong too... It happens a lot so I don't mean to make a mountain out of a molehill

FWIW, Reagrding the boost and pulley, the relationship of boost to diameter isn't linear. For instance going from 3.4" to 3.2 " pulley is 1.5-2 psi increase. So that's a 23% increase in boost from only a 5% decrease in diameter... You started with a ~3.2" pulley on the S I believe...You can see how 2.5" could double your output based on above...

Best,

Phil

08-25-2008, 03:43 PM	#78 (permalink)
turbophil Plug Whisperer Join Date: Dec 2005 Location: Kansas City/ Overland Park Posts: 2,544 Images: 6	I hope I'm wrong too... It happens a lot so I don't mean to make a mountain out of a molehill FWIW, Reagrding the boost and pulley, the relationship of boost to diameter isn't linear. For instance going from 3.4" to 3.2 " pulley is 1.5-2 psi increase. So that's a 23% increase in boost from only a 5% decrease in diameter... You started with a ~3.2" pulley on the S I believe...You can see how 2.5" could double your output based on above... Best, Phil __________________ \| '05 GG LSS Elise \| A Track Chariot \| BOE ClamHinge \| BOE TVS SuperCharger 280whp/180wtq \| EFI Standalone Engine Management \| BOE Fuel Surge System \| BOE Lotus Tow Package See my car at BOE Fabrication: www.boefabrication.com *----->Last Updated: 9/25/2009* If something ain't worth doing right, it ain't worth doing... *Whoever thought working on a Lotus is hard, clearly hasn't tried it. Pick up a wrench and get some grease under your nails*