Upgrade from the 4160 Holley

[71dustar]

I'm seeking some advice on which carburetor to increase some performance out of the duster by switching out the 4160 Holley 750cfm. Since I live in AZ, I don't need a choke and would rather have the choke plate and components M.I.A. Also, i'd like to try mech sec instead of the vac sec currently on the 4160. It would be nice to have a 4 corner adj.

Engine Specs
408 strokers
0.030 over
0.545" gross lift
In-241 Ex-247 @ 0.050
Eddy RPM Heads
Eddy airgap intake
tti headers


Ciao,
Jon

 

[70aarcuda]

950 Holley DP.......

 

[Brian Hafliger]

750DP with a 1" open spacer would be the cheapest HP per dollar. After that, yes the 950HP will add about 10HP and same TQ over the 750.
The 750 will cruise much leaner helping fuel mileage as well.

 

[71dustar]

Could not find exactly what both have said so is the following link what you meant?

http://www.summitracing.com/parts/HLY-0-80496-1/

 

[71dustar]

will 950cfm be over doing it?

 

[OldmanRick]

750DP with a 1" open spacer would be the cheapest HP per dollar. After that, yes the 950HP will add about 10HP and same TQ over the 750.
The 750 will cruise much leaner helping fuel mileage as well.

http://www.summitracing.com/parts/HLY-0-80528-1/?rtype=10

Maybe?

 

[Brian Hafliger]

The 950 still has a 1.375" venturi just as the 750 does, but the 950 has larger 1.750 blades vs. 1.687 blades on the 750. They don't flow 950cfm at 1.5in.hg.
For the $$$ the plain jane 750 double pumper is the way to go.
Part # is: 0-4779c
Brian