Blower Ratio for Boost

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02-15-2004, 11:18 AM

eliminator219

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Blower Ratio for Boost

I am interested in increasing the boost on my motors(540s) and was wondering if someone could tell me the combos that would do this? I have 871 BDS blowers, 3 in. Gilmer belts with superchillers and would like to have 10 to 12 lbs boost. what pulleys would put me in this range?? My top pulley at present is a 55 tooth.Buttom unknown around 63 nearest I can remember.
Appreciate any help you guys can give me !!
Thanks

eliminator219

Last edited by eliminator219; 02-15-2004 at 08:13 PM.

02-15-2004, 11:30 AM

mcollinstn

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what cubes?
what current boost pressure?
what current pulleys?

02-15-2004, 11:44 AM

38KV

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The Weiand technical info says:

If you have 454's, 5% overdrive will give about 11 lbs
If you have 502's 15% overdrive will give about 11 lbs
If you have 540's 25% overdrive will give about 11 lbs

I think this values is without chiller.

Here is a ratio chart.

www.earlyhemiparts.com/Blower-Ratios.shtml

Jonas.

Last edited by 38KV; 02-15-2004 at 04:13 PM.