Ok guys i know they are out there so who makes them and how much are they? this 6 # psi is not cutting it at all. thanks for the help

 

would you sell your 6psi? and on the 9lb look on ebay there is a company on there that sells and makes them also the powerdyne website

 

the 6 makes 4.5 and the 9 makes 6...go figure. there is a company that fiddles with the powerdynes for porsches thats makes lots of em

 

but don't each set up have diff specs such as the camaro and mustang kits different. see i have the 6# pulley now and at almost a mile high im seeing almost 5.5psi so im just counting my blessings.

 

yea the Fbody pulleys are specific.. i bought what i thought was a 6psi for a BD11A unit but i get it and put it on and it makes the one i have that is sappose too be a 9 look tiny so i put it on and the most i could get out of it was 3.5-4psi at HIGH RPM so i measure it and its bigger than the 4.5psi are sappose too be, plus the backspacing is way off from the 9 and causes it too stick out so i had too shim the tensioner and crank pulley too get them too line up. I also mesured the 9 i have and its even smaller than what powerdyne sells as a 9lb. So i got one pulley that is too small for what i want + all it does is slip since its so small and the other pulley is too big