TM6 or AirGap RPM for 451 stroker???
#92457
07/22/08 11:56 AM
07/22/08 11:56 AM
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Joined: Jul 2005
Posts: 1,954 Blairsden, CA
Triggerfish
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Blairsden, CA
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Just built 451 stroker for my 68 Cuda (4spd, 3.55's), 440 source kit, Eddy large chamber heads, Engle hyd flat tappet cam (special grind K56/K58 on 114 centerline), Approx 10:1 compresson. I've got a TM6 w/ Holley 850 on it now, but would the RPM air gap yield more torque & better performance? I'm also thinking of mililng the heads for more compression or switching to the smaller chamber eddys. Want the Cuda to be a hot street car that won't see the strip too much.
Last edited by Triggerfish; 07/22/08 12:04 PM.
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Re: TM6 or AirGap RPM for 451 stroker???
[Re: bigsbigelow]
#92461
07/22/08 12:30 PM
07/22/08 12:30 PM
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Joined: Jan 2003
Posts: 75,050 U.S.S.A.
JohnRR
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RPM AIR GAP ???? Don't all big block mopar wedge engines have an "AIR GAP" intake by DEFAULT ???? just thinking out loud
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Re: TM6 or AirGap RPM for 451 stroker???
[Re: JohnRR]
#92462
07/22/08 12:57 PM
07/22/08 12:57 PM
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Joined: Jan 2003
Posts: 16,376
dogdays
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OOPS! RIGHT, NO AIR GAP for 400s. You'll have to block the exhaust crossover to get max benefits but still a great manifold. Air gaps and regular Perf RPMs have AFAIK the same interior configuration as far as ports and plenum. R.
Last edited by dogdays; 07/22/08 03:43 PM.
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Re: TM6 or AirGap RPM for 451 stroker???
[Re: Triggerfish]
#92466
07/22/08 03:17 PM
07/22/08 03:17 PM
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Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
Too Many Posts
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Balt. Md
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My son loves the Performer RPM on his 400 Dart. It ran a tad quicker then the Street Dominator did by about a 1/2 a tenth even though it had less mph then the SD. The 1/8 and 60 ft were much better with the RPM and it was enough to keep the 1/4 et quicker then any single plane he tried and the SD was the best single plane on his Dart. He will never go back to a single plane on his combo he says even though I have out 60 ft him with the SD on my 63. But honestly Andy is so right as the RPM is great for a mild street/strip car. Ron
Last edited by 383man; 07/22/08 03:18 PM.
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Re: TM6 or AirGap RPM for 451 stroker???
[Re: dogdays]
#92468
07/22/08 05:28 PM
07/22/08 05:28 PM
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Joined: Jul 2005
Posts: 1,954 Blairsden, CA
Triggerfish
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OP
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Quote:
OOPS! RIGHT, NO AIR GAP for 400s. You'll have to block the exhaust crossover to get max benefits but still a great manifold. Air gaps and regular Perf RPMs have AFAIK the same interior configuration as far as ports and plenum. R.
I thought the RPM air gap for the 383 would fit w/o any modifications. How do I block off the exhaust crossover?
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Re: TM6 or AirGap RPM for 451 stroker???
[Re: AndyF]
#92475
07/23/08 11:43 AM
07/23/08 11:43 AM
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Joined: Jan 2003
Posts: 17,875 S.E. Michigan
ZIPPY
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Yep, that is part number P5153525. There is a shot of it on page 62 of the 2007 MP catalog, but I like your picture better! Oddly, it can actually be bought for less than Summit charges for a regular RPM intake, but you need a good guy parts fella who will sell at a small percentage over dealer net. At retail it's higher priced than Edelbrock...but after a little digging, I found it to be sometimes lower priced, depending on who was selling it. Personally I would really like a B version for my C body, but there is no such thing
Rich H.
Esse Quam Videri
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