FrontEngineDragsters.Org Forum
Classifieds (Please No Dealers) => Wanted to buy => Topic started by: hotrod316 on August 06, 2019, 12:17:23 PM
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looking for some 8 mm pullies 42 and a 60 something close to 25% under drive thanks
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I do not have any for sale but a 42 top and a 60 bottom is 42% OD I may misunderstand your question though
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UNDERDRIVE -25% BIG ONE ON TOP, LITTLE ONE ON THE BOTTON I THINK
ONLY WANT 2 MORE LBS
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Ok 55 on top and a 44 on bottom gives you 25%UD or tons of other ways to get there. But I know most of the manufactured belt guards won’t fit a 60 tooth pulley on the top
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... But I know most of the manufactured belt guards won’t fit a 60 tooth pulley on the top
I can get a 58 on top, but unless the belt is SUPER tight, it'll candy stripe the back of it.
On a SBC with a RCD crank support, you can run down to a 53, but you have to relieve the I.D. of the lower pulley a tad bit.
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OD% (or Under) only equates to how soon the blower reaches full boost before it starts to cavitate. 5 over made the same boost as did the 18 over, but was a rocketship at the hit with the 18%