View Single Post
  #4 (permalink)  
Old 08-03-2002, 12:21 PM
Naja's Avatar
Naja Naja is offline
CC Member
Visit my Photo Gallery

 
Join Date: Jul 2000
Location: Deer Park, TX, USA,
Posts: 128
Not Ranked     
Default

Thanx Jack and Jack.

Any idea why some of the older BB builders have told me that the pump should be about 30% overdrive? (speaking as though that is common knowledge).

I have the March 5.75 inch crank pulley (they make a 5.25, also), and the 6.25 inch water pump pulley (as part of the HP set). They also offer a 5.5 and 5.25 inch water pump pulley for $95 each. Right now I am running about 8% underdrive. With the 5.25 inch water pump pulley I would be running 9% overdrive. If I have one made, I safely could probably go as small as 4.75 inches, giving me a 20% overdrive (for $140).

I am also curious about the diameter of the stock crank and water pump pulley on the 429/460, but I haven't been able to get that info (to see if it is around 30% overdrive). Any help would be appreciated.

Frank
Reply With Quote