Originally Posted by racerhog
My 2 Cents.... Dont spin the pump over 6000 RPM'S..
My 2 cents on the Vacuum 12-14"
I prefer the 4 Vane Pump. But as long as the one you using will pull whatever vacuum setting you feel you need and it's working and your not having to rebuild the pump all the time. Run it... smile
But like I said. Thats just my point of view. smile

my pump run at over 7500 because have same pulley on the crank same diameter on the pump ....

1970 Cuda 496 street driven 9.22@150
1971 Demon 572 7.82@176
1957 Desoto Adventurer Convertible 345 Hemi
1958 Plymouth Fury Christine
2008 Dodge Ram 1500 Hemi
1970 Dodge ChallengerRT 6pack 4 speed 1 of 135
1968 Dodge Charger RT 4 speed