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Probably a simple ??? but, how do you identify model of Holley carbs? Also, from the looks of mine, I think it has vacuum secondaries. If I remember reading right I won't get secondary opening until about 500 RPM past WOT. All these years and this boat has the first Holley I have ever owned! Help!
Thanks.
Get the # from the side of the main body and do a search on Holley's site. It'll tell ya all ya want to know except for the modifications performed by owner/mechanic.
If it is a normal Holley 4150, the list# is on the choke horn facing foward on the drivers side(that would be in a car application) TIMINATOR
I found the numbers they are
#80551
600 CFM Vac. Sec
Thanks for your help.
I am not sure about the internals of my motor...I got it for Fathers Day last year. It is a 350 SBC, it has a bit of a lope (prob. not a stock cam) to it and an Offenhauser 360 Hi Rise Manifold. Mallory Dist with a Pertronix solid state ignitor. Do you think a 750 would be too much? Would I see a significant difference?
I am going to ask a few friends if they have a 750 in the garage and borrow one for a day.