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Discussion Starter #1
Just wondering if the Performer RPM Air Gap is worth the extra $$$ over the standard Performer RPM intake, want to replace my current RPM since it's crusty and I'm tired of polishing it, I know most of you probably run single plane stuff for the max effort crowd, but my jet only has a 383 SBC that's turning an A impeller 5K so I don't think I'd be well served with a Victor style intake (I'm going to have the impeller turned down to an A/B but that will probably only give a couple hundred more rpm), it's got Sportsman heads, Bassetts, and a hydraulic roller with 230/236 duration, since it is a small block every last bit helps, I'm not expecting 50hp or anything like that, just want to know if the extra cash is just buying the look the air gap has, thanks.
 

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Bouncing off rocks
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bead blast it and save your money. uness youre going to spend the coin for the polished/chrome painted intake, youre gonna have the same problem in a few months. id still go for the single plane anyway though. what size carb you running? if youre looking for every last bit, mill the chokehorn off your carb. i run a smallblock too, so i get it
 

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Discussion Starter #3
I'm looking at one of those that are chrome or whatever they call it, endurashine, running a 650 DP.
 

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E-7 Sheepdog (ret)
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I'm looking at one of those that are chrome or whatever they call it, endurashine, running a 650 DP.
I run an engine cover, so screw the Endurashine bling.

IMO the Air Gap helps, due to the aprox. 2" higher carb mounting which straightenes the path to the ports better than the flatter non-air gap.
I consider the cooler running manifold from the air gap a minor bonus on an already fairly cool-running aplication.

I have no problem turning my "A" cut 5,400 with a very mild 454 build, and 5,900RPM with the Nitrous flowing.
That's with a too-small carb too (700cfm DP Holley).


IMO, buy the Air gap, all other things equal.
 

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Just wondering if the Performer RPM Air Gap is worth the extra $$$ over the standard Performer RPM intake, want to replace my current RPM since it's crusty and I'm tired of polishing it, I know most of you probably run single plane stuff for the max effort crowd, but my jet only has a 383 SBC that's turning an A impeller 5K so I don't think I'd be well served with a Victor style intake (I'm going to have the impeller turned down to an A/B but that will probably only give a couple hundred more rpm), it's got Sportsman heads, Bassetts, and a hydraulic roller with 230/236 duration, since it is a small block every last bit helps, I'm not expecting 50hp or anything like that, just want to know if the extra cash is just buying the look the air gap has, thanks.
IMO, i agree with Smoke...the Air Gap is the best dual plane out there :)...ck www.raceingjunk.com...i seen one on there just the other day under "manifolds & carbs"...just my .02 cents!

FastRat
 

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E-7 Sheepdog (ret)
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And IMO when you are spinning under 5,500RPM, as a norm, a really good dual plane is a better choice than a single plane, especially if you have a hard-working general-use lake boat like mine, not a 2-seat river-runner that you don't own a ski rope for and have nowhere to tie it to if you did.
 

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single plane on a jet:)handcut your impeller to b-cut and you might gain 150-200 rpm,just cutting to a {a/b }and you wont gain much.;)good luck,travis
 
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