Triple CP3's

Leadfoot

Needs Bigger Tires!
Dec 27, 2006
904
31
28
48
Western MA
www.matpa.org
If one were to utilize 3 CP3's, would it make sense to underdrive the 2 "auxillary" ones so as to not overspeed at high engine RPM's (assuming it was plumbed in a way that the stock valley pump and 2 auxillary feed commonly both rails)?

If so would a slightly larger pulley fit?
 

quadracer37

New member
Mar 31, 2009
547
0
0
northern, IL
If one were to utilize 3 CP3's, would it make sense to underdrive the 2 "auxillary" ones so as to not overspeed at high engine RPM's (assuming it was plumbed in a way that the stock valley pump and 2 auxillary feed commonly both rails)?

If so would a slightly larger pulley fit?

yes and yes. i explained this a little bit earlier. my pulleys are the same size as the stock balancer 7 5/8", giving a 1:1 ratio to engine Rpm. ats is 6 7/8". in the case of people with aftermarket balancers their pump will spin even slower then engine rpm, because if i remember correctly, most aftermarket balancers are slightly smaller in diameter..?
the idea is to not overspeed or over work the pumps and keep them running within their most effiecent flow range. (around 3200rpm with a stock pump)
it is pretty tight right now with these pulleys but i could go larger if i really wanted to it would just require the bracket to be laid out differently.
 

duramaxsandwich

New member
Mar 30, 2009
206
1
0
yes and yes. i explained this a little bit earlier. my pulleys are the same size as the stock balancer 7 5/8", giving a 1:1 ratio to engine Rpm. ats is 6 7/8". in the case of people with aftermarket balancers their pump will spin even slower then engine rpm, because if i remember correctly, most aftermarket balancers are slightly smaller in diameter..?
the idea is to not overspeed or over work the pumps and keep them running within their most effiecent flow range. (around 3200rpm with a stock pump)
it is pretty tight right now with these pulleys but i could go larger if i really wanted to it would just require the bracket to be laid out differently.

lets finish putting my motor back together at the shop today so we can go to the dyno again and make sure all this crap works:thumb:
 

LWATSON

future trans limpers
Jul 30, 2008
2,587
1
36
55
Scotland Neck NC
Could you delete the pump in the valey and run this setup as a dual setup? It would be allot easier to swap out a pump if one crashed and needed to be swaped in a hurry.