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Author Topic: Difference in performance of the Edelbrock RPM AirGap over the plain RPM?  (Read 1919 times)
4 Banger
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Posts: 39

Location: Maine

« on: June 10, 2017, 03:38:09 pm »

Is there enough of a difference to make it worth swapping on a 306 with Windsor Sr. iron heads,  an e-303 cam, a t-5 and 4.11 gears?
Big Block
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Posts: 2453

Location: West Virginia

« Reply #1 on: June 10, 2017, 06:54:55 pm »

Air Gap 351W is slightly larger, and much taller than the regular RPM.
Air Gap 302W is the same size inside, and the same height as the regular RPM.

For a 302, save your money. 

Good Luck! 

1966 Mustang, Toploader 4-speed
Pump Gas, Flat Tappet 306
9.88 @ 135.67
mighty mouse
"Prom King Mista Nathan Moonen"
Big Block
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Posts: 12781

Location: Decorah, Iowa
I'll be the Judge of that

« Reply #2 on: June 13, 2017, 12:37:35 pm »

It will make no measurable difference on the 302 based engines.  I have seen articles where the Windsor version picked up a couple horsepower with the swap - but if I already had a regular RPM i wouldn't spend the money swapping over with the 9.5 either.

1986 Mustang GT Convertible
Suspension and Differential by Team Z Motorsports
9.5 Deck Forged Stroker Shortblock by FordStrokers
Trick Flow High Ports and Super Vic EFI intake by Duane Busch

I'd rather be a fool who is loyal to his friends than a POS that jumps ship to save face. We were wrong in the end, but nobody can ever call us disloyal. I can live with that.
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