What carb would you run?

[Barry_R]

Recently ran a pump gas 445 inch 390 based stroker on the dyno. Mild Edelbrock heads and a BT dual plane. Pulls from 2500-6500RPM. Went from a 750 double pumper to an 850 double pumper with no other changes - back to back withing 15 minutes. Engine picked up 35 horsepower at peak (to 485HP) and lost nothing anywhere.

Go big....

[hi-tech cobra]

Barry,
Hmmm...I might be selling a nice "Dyno time only" QuickFuel 780 w/ vacuum secondaries in the near future.

[danc30]

Quick-Fuel 950 on mine

Keith tried a 750 then an 850 and said he wasn't getting what he wanted from the motor on the dyno. He upgraded me to a QFT 950 and it's great.

Dan

[767Jockey]

All,
Keith and I both have crazy schedules and it's very hard to actually get a mutual time to speak on the phone. We finally got a chance to speak today. He strongly recommends a Quick Fuel 950 - that's what I'll go with. Thanks for all the input, very interesting and informative comments, I really appreciate all the input. Thanks.

[Chaplin]

Originally Posted by Barry_R

Recently ran a pump gas 445 inch 390 based stroker on the dyno. Mild Edelbrock heads and a BT dual plane. Pulls from 2500-6500RPM. Went from a 750 double pumper to an 850 double pumper with no other changes - back to back withing 15 minutes. Engine picked up 35 horsepower at peak (to 485HP) and lost nothing anywhere.

Go big....

Barry-
This is interesting. At what rpm did the engine pick up 35 hp? If peak hp was in the higher rpm range where you never really drive on the street (6000 rpm plus), the argument could be made that you are better off with the smaller carb- I noticed that you don't say that the bigger carb picked up anything over the smaller carb other than at peak hp. And although you state that the bigger carb did not loose anything relative to the smaller carb anywhere, that is with the engine on a dyno, do you think that once installed in the car and were out on the road, the smaller carb would have better throttle response than the bigger carb? So I guess that is a long winded way of asking, notwitstanding that you may pick up 35 hp, might you still be better off with the smaller carb for non-race/street driving?