67t5ponycoupe

What is a double pumper! Man do I feel old!

ponyx2

I hear ya 67. Double pumper, dual feed, etc, those were common terms in our day. Now tuning and hot rodding seems to be done on a hand held or a pc

Aussie66Fastback

ok, heres how i understand it...someone with more knowledge will no doubt edit!

4 barrel carbs have 2 basic configurations - Vacuum secondary or Double pumper
Vac sec carbs have one accelerator pump and utilise 2 barrels out of the 4 initially. then manifold vacuum increases with heavier right foot brings the second 2 barrels into play...more fuel for more power and more revs. Its essentially an economy thing. if you stay off the gas, it doesnt use near as much fuel.

Double pumper has 2 accelerator pumps. the secondaries are mechanically opened and the pump provides additional fuel for better response to the pedal before the secondaries can provide it. D/P more used on performance street or race motors where the response to fuel economy is "who gives a ****"

Sorry its not that good an explanation

andrewmp6

find you a old guy 50s or older he will know or like they said a engine builder for a circle track

Brandontyler65

look in the faq i submitted vids put out by edelbrock on how to do everything that you want with their carbs its on their website they have vids that tell you whats what and what to do but the faq has it too thanx to me

mikethebike

When I first read this I thought it was a misprint...52/54's in an 850cfmdp? What kind of idiot did that? And just how long do you think it was befor he burned holes in his pistons?