18% UD maybe 6# boost test

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Re: 18% UD maybe 6# boost test [Re: fast68plymouth] #3132713 03/27/23 12:24 PM 03/27/23 12:24 PM
Joined: May 2011 Posts: 4,489 northern,Ohio,USA C Clanton OP master
Clanton OP master C Joined: May 2011 Posts: 4,489 northern,Ohio,USA	Originally Posted by fast68plymouth Are you not able to just flip the pulleys and go from 10% OD to 10% UD........ and see what that does? Last yr I swapped the top pulley for -6% and got 12psi so not much reduction in psi and by charts it takes 5% for 1# if boost so I dropped it what I could with pulleys I have 55crank 67 blower and have a 50t for crank but felt that was way too small. ps:the 6psi would give me an effective cr of 12/1 cr and should go with the cam ok. Last edited by Clanton; 03/27/23 02:03 PM. GOTBOOST!New improved with Victor heads. http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/

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