Just because it is dual feed, doesn't make it a double pumper. A double pumper doesn't use a vacume secondary, it's manual
Explain to us exactly what your wanting..... Are you wanting a single feed carb, that is just smaller than the one you have now? Sorry for getting slightly off topic w/ the dual feed/blocks... I thought you were wanting dual metering blocks instead of the metering plate.
so your saying if i get metering blocks and a base plate from a 650cfm holley and adapt them to the 725cfm holley i already have the cfm will be 650?
Im saying if you swap a baseplate from a 650 onto your 725 it should make it a 650 cfm. This is what I've been told anyways. The metering block should all be the same. Only difference would be power valve sizes and jet sizes, which are all swappable to whatever you may need. Are you wanting to add a rear metering block?
http://www.mustangtek.com/4118.html this may help more the carb i have is the same as this one dual feed single pump
Ok so you already have dual metering blocks, and center hung bowls. NOT a single feed, center hung bowl as I thought you had. So your just wanting to change the CFM of your carb? If so you won't need to swap any metering blocks and bowls... just the baseplate
Exactly, just the proper baseplate. I could be wrong on this, but that's what I've heard my entire time messing with these carbs.
Sorry for all the confusion earlier. You just mentioned metering blocks, not block... so I thought you were trying to convert to that also. lol
I think he's looking for information, not for someone to sell him something. That's also a violation of the new rules btw
A double pumper has two accelerator pumps...One for the primary side and one for the secondary side...Hence the term "double Pumper" 650 cfm metering blocks may have different sized air bleeds and emulsion tubes compared to a 725/750 as well. Metering blocks dont increase carb cfm ratings...Size of the venturi and throttle bores does that.
