Just trying to see what people are using for blow through carbs? Modified holley? quick fuel? BG Demon? etc etc... Im debating modifying my awesome holley 750 or buying a new BG carb. I read some scary stuff about carbs being made out of a billet of aluminum, which has got me confused.

I'd recommend C & S Specialties or CSU.

We have been using QuickFuel with the Buicks. 3 motors at the 1000+ hp level with 850's, one streetable at 900 hp with a 750. Will be trying a 650 on a small block Buick (370 ci) and then putting it on my 462 big block and see how that works. All of these are Procharged running from 8 to 18 psi.

CSU definitely.... skip everything from BG IMO.

Any particular reason? I was considering them actually, just cuz i have had real good success with their N/A carbs, but the aluminum aspect has me second guessing.

Im not actually sure, but are the BG carbs aluminum or Zinc?

I have a BG and for the track, it seems great. But on the street I don't like it. I have a real hard time getting the primary side tuned right. It used to be very inconsistent too, until I cleaned it five times and found a bunch of metal shavings.

I paid 400 bucks for it used and personally, I can't justify spending 900 on a carb. I'd rather go efi. Carbs are easy to get close, but it takes a real pro to get them perfect.

I have heard great things about CSU and C&S carbs "out of the box".

does pro systems make a blow through?

yes

ive had heard mixed reviews about the BG carbs. Im running a Holley 750 dp that i will send to csu to have those guys modify for blow thru

Using a modified holley

I would use either CSU or Pro-Systems for a gas motor and C&S for E-85 or straight methanol. We ran a Pro-Systems on our Drag Radial car with the F-1R and 383 on gas,and ran really well,didn't have to even rejet it,ran 5.89 120mph 1/8 mile with a 1.37 60 ft on drag radials and 3700 lb race weight. We are running a C&S Alcohol carb on our new 18* 434 sbc with the F-1R Procharger running methanol. Haven't got to run it yet,we are hoping for at least 5.30's 1/8 mile.

Thanks guys, thats helpful information.

One of the hardest things about making this decision was the lack of info on blow thru BG carbs. I cant seem to find anyone whos using one.

I think ive made my decision.

I have one and am selling it real soon. They say its only meant for under 10 psi. I think it would be a good carb for someone only making 550-600fwhp, but I don't like it at my 700+ level. It doesn't transition well with that much air, even though I'm only pushing 9 psi.

When I go turbo, I will use a better carb.