Offshoreonly.com - EFI, Edelbrock vs Holley vs FAST vs Accel

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I ran the FAST system with these and it worked out pretty good. Definetly could do more than I knew how to program!

I know this an old thread BUT....
I have a good running 509ci 68hrs w/an edelbrock 1410 750cfm carb (basically a hp500 motor). I have thought this carb is a limiting factor in my Hp. Not wanting to ruin a good thing... Am I foolish for changing over to a Holley 850cfm or is it recommended to do so for a nice jump in perf? Thx

Our experience is you might get 5-10 HP and show no increase in MPH

Thanks...kinda what I was thinking and at the same time, not wanting to screw up a good thing. Thanks!

Quote:

Originally Posted by MadMat (Post 2850966)

I'm looking to put EFI on a 540 tall deck (Merc Bulldog). The target hp for the motor is just abit over 600hp and it is planned to have CMI sport tube headers or similar and original heads (if poss)

The choice of efi seems to be narrowed down to the following:

Holley Commander 950, 2000cfm, 42lbs injectors
Edelbrock Pro Flo2 EFI (Not sure if available in tall deck)
Accel DFI 77203EB
FAST 3011572-10

Ignoring the differences in cost, which of these systems is best?
Firstly, in terms of power producing capability, I dont want the manifold & TB holding the engine back. Secondly in terms of build quality.
At the moment, I'm veering towards the holley, with the edelbrock 2nd if it's available in tall deck, but don't have firsthand experience of any of them yet.

Thanks
Matt

Autronics. Not cheap though.