I'm trying to put together some ideas for building a street/strip motor for a fairly light car (2900 lbs). I'm going to do either a 383 or 406. I want to be able to run this on pump gas (10:1). I have a program called Virtual Engine Dyno 2000. Keep in mind I dont think these programs are 100% accurate, but do beleive there accurate enough to use as a base. I have been messign around with combinations to see what works the best. All my combinations have been with a Vistor Jr. Intake. At about the 10th combination, I was scratching my head wondering why my 406 wasnt making 400 ft lbs of torque yet at 3750 rpms. Matter of fact torque was peaking at 5000 RPMS!! This is with a solid lifter cam. I decide to switch to a RPM Air Gap intake. I couldnt beleive the difference. the torque was close to 480 ft lbs on the low end and horsepower was anywhere from 460 to 470 at about 6000 rpms. Are RPM intakes that much better for a street/strip application? Or does my program have a glitch in it somewhere? Every street/strip small block making just under 500 or so horse I have seen always has a victor Jr on it though?

Ask ole 40Coupe if the air gap is better than a Vic Jr. :D He is running one now on his 383 and ran a new best a month or so ago in good air,not great but good,,,,knocked a tenth off his previous best.

i have some real experiance here. although it is with a super victor on a 383. i can verfy the 5000 pk tq. i will certanly try the RPM airgap, just have to. will post the results if and when i finally get to the track. Dave

Lok at the Brodix HV0016{i think thats the #} It put a WHOOPIN on the RPM AirGap in back to back dyno runs and darn near made as much top end as the Victor JR. Dyno pull was to 6800RPM i believe. I think this was in Super Chevy a year ago or so.

Bump