holley street intake?

[fe66comet]

Just was thinking I would use my Holley street dominator intake for my next build. I want to build a 390 torque engine for my Bronco II. What rpm range was that intake rated for? I see it is an open plenum design, would I be better off with a duel plenum with an uncut divider? Also which heads are best for low rpm torque numbers? Thanks guys

[jayb]

The Holley Street Dominator is an excellent intake, but not really well suited for low RPM power; powerband is probably 3000-6000 RPM on a 390.  I think you'd be better off with a dual plane intake, like an Edelbrock Performer. 

[Qikbbstang]

were originally designed for cars, trucks and Recreational Vehicles in the midst of the first gas crunch/lackluster looser OEM engine performance emissions era. If that's so the small intake runners, steps at head/intake and even the horse collar in the plenum were all intended to trick the single plane into running like a dual plane by upping velocity and providing anti-reversion.
   I built a F150 w 351M w/ RV cam, exhaust and a 500CFM Holley 2V and as funds permitted I finally bolted on a Street Master after 10,000 miles... I know it was the final step-up but that intake completely changed the motor night and day for the better and it even out low-ended the stock intake. The Port Size difference was blatent against the 351M/Cleveland 2V heads.

[fe66comet]

Kinda narrow  rpm window and useless for me as if I build a smaller displacement FE like 360 or 390 it will be an idle to 5000 engine. I will be looking for high velocity and was planning on using my 390 four barrel 1.25/1.785 port heads with some slightly bigger valves and a little cleanup and match to the intake is all. Is there an intake that has a port cast that small? My Edelbrock gasket is quite a bit larger at the bottom.

[jayb]

The Performer 390 intake has smaller port sizes, 1.75" X 1.00".  Should match up to your heads pretty well.

[fe66comet]

Great that will work thanks Jay