VLS1

Hey all, weighing up my options right now and have narrowed it down to two carbs.

Quick fuel BDQ-950 with 1.45" venturi, or Holley 850 ultra HP with 1.56" venturi.

As most would know, both carbs use a 1.75" throttle bore size.

Which would you choose and why?

Approx 3000lb race weight, built LQ9 with ported LS3 heads, Vic Jr intake, 4700+ stall etc.

dogsballs

i like the holley's, easy to get parts.

thought about e85?? eric from horsepower innovations does awesome e85 carbs based off the holley's. good price as well $US730 for my custom Holley 950.

VLS1

I have heard good things although I only plan to run pump gas at this stage.

VLS1

Any quickfuel users?

Luke_Siebert

I have had the best results on similar combos with Holley based carburetors with 1-3/8" venturis.

VLS1

Thanks for the feedback, reassessing my options at the moment.

dogsballs

quickfuel aren't bad, just think people stick with holleys

BigEd_72455

iTrader: (7)

I got a holley 750 from TXsilverado that I haven't even put fuel to yet and it is on my 5.3 stock LM7. being yours is a heavy breather with the heads and intake and I am sure much higher redline than what I plan to, I would go with the larger CFM unit if its available for about the same as the holley. But TXSilverado also just had a quick fuel carb completely redone by them and he likes it. If it weren't for a broken valve spring, he would have pulled even faster times than what he already has with the truck on drag radials. And I do not believe he has done any tuning to it as of yet.

Pop N Wood

iTrader: (1)

Quick fuels are just very well made Holleys. Lots of guys on here run them, very good carbs. In fact, Holley made the HP so adjustable in part because of companies like Quick Fuel forcing them to upgrade their product line.

vht

I have a QF 850 Q series, very nice carb. Customer service is great.

fast89stang

iTrader: (2)

I have a Holley 950 ultra hp and love it. I had a 750 Quick fuel and it was the best carb i ever had. Till I got this Holley. Yes, the Holley needed work and still does, but I love some of the features of the new ultra hp. i can just move my link from progressive, to 1-1 and picked up et, and it was as easy as moving the adj link.

VLS1

All good info guys, appreciate your responses!

speedtigger

iTrader: (16)

I think your combo could handle that big Holley, but I have heard a few complaints from some very knowledgeable people on the new Ultras. They don't like the tune that is in them. Specifically, the way the emulsion circuits and air bleeds are set up. Not that it can't be made to work, but just not to their liking out of the box.

I have always liked the Quick Fuels. And, they have all the right features for fine tuning. It is my carb of choice these days.

VLS1

Yeah I am thinking quick fuel as well, and I will just tweak it myself.

I had a 750HP once that worked great which was setup by the previous owner, I remember changing the jets and discovering it had a 50cc pump on the front and possibly the bigger base plate (can't recall) but I can't be bothered with having to experiment, when these days you can buy a good off the shelf carb that will only require a minor jet or air bleed adjustment to suit conditions.

Cheers!