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Old 07-02-2012, 08:36 PM
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Should I keep what I got

I just had my first stroker (386) sbc built. will be running 110 octane,solid lift cam, an edelbrock performer rpm aluminum heads 12:5:1 compression and will be driven occasionally on the street. My question is I currently have a edelbrock performer rpm intake should I keep that one or should I up grade to an air gap rpm performer or something else. Both of the mentioned intakes are good to 6500 rpm according to the website. I don't know if the air gap is going to make any difference or not. My 68 has a big block an a victor jr. This engine is going in my 67 camaro with Muncie 4spd. Any opinions appreciated.

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Old 07-02-2012, 09:21 PM
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I personally wouldn't change it, unless you feel that you will gain something by switching to the air gap. I personally think the gains would be minimal, and not worth it given the cost. By the description you give of your combo, I'm surprised that you aren't using something more like a Vic Jr. or Victor instead of the Performer RPM, given the high compression, solid lift cam, etc, I would expect your RPM range to be up in the 7000 to 7500 range where one of those intakes would shine. Not knowing your cam specs makes all this just speculation, though. I'm guessing you got the Performer RPM to match the heads?
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Old 07-02-2012, 10:09 PM
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Well little bit bout the cam lift 540 duration 298 I just had the intake already. I like the victor jr i didn't think you could get much more than 6500 out of a stroker. An such I was going to occasionally drive it on the street I was thinking of low end power an responsiveness . So I guess I need to ask what you guys think i should run cause I really am not sure . Gears are 411
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Old 07-03-2012, 01:14 AM
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Quote:
Originally Posted by pacman View Post
. Gears are 411
Keep the performer rpm. you won't be reving the motor high enough to make best use of a single plane manifold.

And the rpm manifold is a much nicer street manifold.

Try a carb spacer for more top end if you think it needs it. After trying it as is, first.
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Old 07-03-2012, 07:07 AM
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If you want to match your combo yo shluld go with the super victor. The victor jr isn't even worth mentioning. The rpm will crutch an engine that is not matched to your application but leave you short on top. A street application would call for an rpm, your engine combination calls for a super vic.

Fwiw a super vic can be completely streetable if you have a good carb.
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Old 07-04-2012, 06:50 PM
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386 build

If you are going to drive it on the street I would keep the Performer Rpm. It would be different if you wanted for all out racing. The operating range on a single plane is 3500- 8000 rpm. The operating range on your cam is 2800-7200 rpms. Is the bottom end built for the high Rpms? The 15-20 hp gain from a single plane isn't worth spending the money to me.
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Old 07-04-2012, 11:18 PM
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The bottom end is internally balanced all forged. 4 bolt main studded an a 010 block. It will be driven a few times a month on the street a just a few trips a year to the track for play time.
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Old 07-05-2012, 02:21 PM
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you can use what you have BUT with those style intakes I have run I always heavily port them, for your application Id suggest a Professional Products Single plane, Much better for what you have...


People seem to forget that no matter how good your heads flow, they will only flow as much as the intake will allow...
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Old 07-05-2012, 04:10 PM
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With a 4-speed, I wouldn't worry about low end torque. It just isn't an issue like it is with too low a stall converter and an auto trans. Your going to be more worried about getting enough tire for traction rather than enough low end torque, once it's running.

Another vote for either the Holley Strip Dominator or the Professional Products Hurricane single planes.

You've got enough cubes, compression, and head flow that you need good intake flow for it to really shine. Your internal balance stroker will turn 7500 rpm without a problem, that "stroker only good to 6500 rpm" is a wives tale perpetuated by those who don't know better and have never done a solid lifter or solid roller 383/385/388 or 406 SBC. It'll RPM just fine

On a 380" or bigger SBC the single planes will drive just as good as a dual plane on 350's/327's. Been there, done that.
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