jetting a holley 750 dp for a 454
09-10-2017, 03:25 PM
#1
1st Gear
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jetting a holley 750 dp for a 454
Hello,
we have built a 454 for a Glastron CV23 jetboat , with LS 6 pistons # 3963550
ported peanut port heads, stock valves
a stage 2 camshaft ENGESH 1139R
CMI longtube headers, dual plane intake manifold
comp cams roller rockers
I just bought a Holley 750 Double Pumper, does anybody of you know which size jets I have to look for in this set up?
Best Regards
Ronald Jonkers
(The Netherlands)
we have built a 454 for a Glastron CV23 jetboat , with LS 6 pistons # 3963550
ported peanut port heads, stock valves
a stage 2 camshaft ENGESH 1139R
CMI longtube headers, dual plane intake manifold
comp cams roller rockers
I just bought a Holley 750 Double Pumper, does anybody of you know which size jets I have to look for in this set up?
Best Regards
Ronald Jonkers
(The Netherlands)
10-20-2017, 12:38 PM
#2
Burning Brakes
Which Holley 750 DP did you buy? (The List number is on the front of the choke housing.) Having the List number at will give us a start for the factory installed jets, power valves, and accelerator pump squirters. Just curious, why did you go with a double pumper instead of a vacuum secondary Holley? A vacuum secondary usually gives a better throttle response depending upon the drag induced by the hull shape and propeller design. DP's are usually best for extremely light weight boats (racers) with little drag.