750 dbl pumper

[305chevy c-10]

has anyone ran a 750 holley dbl pumper on a mild 355 engine .or will it be just to costly to drive ....with gas 3.55gallon ...ifso what about a 600 or 650 dbl

[thirsty]

I would run the 600.

[motion427]

I'd have to agree,600-650 range for a mild 355 in a truck with a normal converter and mild gears.
Unless you would have like a 3000 RPM converter,and 4.11 ring and pinion,then a double pumper would be a good choice.

[305chevy c-10]

maybe a 2500 stall and 3.42 rpm air gap intake ,vortec style heads

[roger97338]

Over 15 years ago, I ran a 750 double pumper on a mild small block. It ran horribly, truly a waste of time and energy. Everyone I knew even told me before I did it that I shouldn't do it. But, the carb was free, blah blah blah...yeah. It didn't work out well at all. I think I traded it to someone for a 600 or 650.

[three8six]

x2 what everyone else said, too big

[figure843]

I have a holley 600cfm with stock jets on my mild 350. runs perrrrrfect. You can always go with bigger jets and squirters.

[ToddN]

750's are for big blocks.  Period.

[slammed79]

750's are for big blocks.  Period.

or smallblocks with forced induction!

[the dan]

a nice 650 single pump vacuum secondary is the way to go for a mild street daily driver motor

[team39763]

A 750 can be made to work, you just gotta spend some time tuning it.  I ran a 750 on my smallblock for years.  I had problems, but I think they were due to the carb having trash in it, me not knowing how to tune, and a big vacuume leak.  I've even used a 850 doublepumper on my motor when it was a little more stockish.  If you're lookin' for gas mileage, you're lookin' at the wrong carbs.

[305chevy c-10]

ok i get it ......will go with 600-650 and electric fuel pump

[305chevy c-10]

i made i mistake my carb is a 750 with dual feed lines ,not a dbl pumper if this makes a difference in if it would work in my  383 app .

[305chevy c-10]

my carb is a 80508-1 holley daul feed elect choke /vac sec 750 .my question is has anyone ever put smaller jets in a 4160 carb like this.i think this route would be cheaper ( re-jet and rebuild it )verses buyin g a 650 carb for my 383 .i realy like the dual feed set up look .

[necromonger]

you can't get calibration kit for a holly that i know of.That is why i like carter or Edelbrock If you have your timing right and your spark advance is tuned right you can tune them pretty easy.