Edelbrock performer or holley street dominator

[Guest Anonymous]

I have a 327 with hump heads. I've been using an edelbrock performer but I recently got a holley Street dominator. I know about the differences in the flow properties of the two manifolds, what I would like to know is who has these and how do they like them on their cars.

Thanks

I don't feel like tearing my car apart just to try it

[Mike C]

If it is the 300-36 it is the one they used to call a Dominator II. Pete has one of these on his Z and my brother has one on his '68 Camaro. It is almost a duplicate of the 67-69 302 intake and the LT-1 intake which I ran on my '69 for awhile. I have a cast iron spread bore version of same on my boat. It is a good intake that should be almost equal to the performer down low and beat it from 3000 rpm up. The Performer RPM will make more power, but if its paid for, not enough to justify spending more $.

[pparaska]

Yeah, that hi-rise holley dual plane has gone through a bunch of names (It's a Street Avenger now, I think, it was a Contender back in the early 90s, and it's had other names), but it's always been known as the PN 300-36.

 

It's "rated" at idle to 7000, but I'm sure it's giving up power at the top end. Grumpy was it the 300-36 that you did a back-to-back drag strip test with against the Vic Jr?

 

All I've done is idle, rev and run in my motor with the 300-36. Once it's been run, I'll let you know what I think of it. But I have nothing to really compare it to (unless I bolt the Vic Jr to the motor). But I'm having some pretty bad rich idle issues right now, so I doubt I'd go that way. Well maybe if I went with the Vic JR and moved down to the 600 vac sec I have. I think the 750 vac sec is just too big a hole to have a decent signal to the venturis with the 57 degrees of overlap (IVC 63 deg) in my cam and the 9.7:1 (177-184 cranking pressure).

 

But I agree, unless it's a really mild motor you never spin above 4K rpm or so, the performer (non-RPM) is not going to breathe as nice as the 300-36 Holley Dual plane.

[grumpyvette]

pparaska

that test was swapping a performer RPM for a victor JR at the track, but the #300-36 holley intake is a good one. lots of the early Z28 guys said the #300-36 worked better than the factory Z28 intake.BUT THE GUYS HERE ARE CORRECT THERES NOT ALOT TO BE GAINED BY SWAPPING TO THE HOLLEY INTAKE FROM THE EDELBROCK RPM.

BTW picking the correct intakes not that hard, just look at your cam specs and average rpm durring a 1/4 mile race, if your cam has 230 or more degs of durration and you spend most of your time with the average engine rpms above 4500rpm you will almost always be better of with a victor style intake , if your average rpm range is below 4500rpm and your cam has less than 220 degs of durration you will almost always be better off with the performer RPM intake. of course engine displacement has an effect here too, a 283 will still like the dual plane RPM style at rpms that would choke a 406s hp potential

[Guest zfan]

Sorry, I do not know anything about Holley street dominator. Ive run Edelbrocks before and you can put them on and set idle and go. Almost anyone I talk to says Edelbrock is a good carb but costs you serious horsepower losses. I am now running a Holley but it is a mechanical secondaries 750 double pumper. Im still de bugging it as we speak!

 

Sure as heck seems to get the car moving thou. More seat of the pants power than Edelbrock.

A friend of mine is running 770 Holley avenger and its ok so he says. Does the carb have vacuum secodaries?

 

Good Luck. Mike

[Mike C]

I think I would stick with the dual plane intake unless you regularly turn more than 5500 rpm. Since Holley regularly changes the names of its intakes I assumed it was the dual plane 300-36 and NOT a single plane. Usually most Holley single planes are the Strip Dominators.

[Guest Anonymous]

Thanks for your input everyone, but it's not a performer RPM, it is just a performer. I'm beggining to think that I'll put the Holley single plane on it instead of the Performer.