I,m building a 69 Camaro Drag car with a 406 roller motor, Pro Action 235 runner heads, 13.5 :1 compression.Callies bottom end, Running a glide with 5:13 gears. Its tubbed with a glass nose, not sure on the weight.Probably shift at 6800-7000 rpm range. My question is what cfm carb would best fit my needs. It will be mainly 1/4 mile runs, a few 1/8 mile tracks.I.m looking at the QuickFuel Pro 850, What do you guys think?
If you're going with the QFT line, would recommend a QFT-P-1050 and an Edelbrock 2970 (Super-Victor 4500) with those RHS 235's.
The last similar setup left here with the above parts and some 2.000" "Stahl" primaries for pipes. Same heads but 11:1 C.R.
Came off the dyno with 580+ HP @ 6700 (this was the "delivered" number, we made 600+ in the dyno room with some very minor changes for our own testing) and 520#+ Torque @ 5700 using 93 octane!!
Had a relatively "small" solid-roller cam inside also, a 256*/264* @ .050". I would assume here you've got a somewhat better "cam" in there with that C.R.
This is presently in a 3600#+ El Camino and runs in the 124/125 MPH range, still on 93!! Last time out he needed a convertor change, was running 11.0's at those MPH's.
Those heads have given us some "very-serious" HP numbers, with a minimum amount of time involved, on other units! We've had some very good numbers with that entire line of heads over the years. Have many BB's here always!
(Add) If you're using an "OEM" 400 block, you can subtract 20/30 HP from the platform over using an aftermarket block. These OEM blocks "lose" that much! Would expect to see in the neighborhood of 700 HP (guesstimated, not having all your specs available) with your build along with some decent torque numbers with that C.R.!
Thanks, Gary in N.Y.
P.S. The "QFT" carbs are some of the best we've worked around!! Normally have about a dozen or so here most times.