edelbrock rpm performer or rpm air gap

[Monaco Man 78]

i was thinking of swapping a perfromer rpm to an air gap, i use my Monaco for daily driving. would get a little bit of horses but should i just keep what i have im using a comp cams Duration 268/268, Lift .454/.454 cam with 625 carter afb comp series. never used an air gap, would i have trouble with cold start ups.

[crisser]

I`d buy one if I didn`t have one. But, since you already have a RPM, I wouldn`t bother buying the air-gap.

[peg leg]

I'm sure happy with the torque from the thing, on my 360 Demon. My cam is relatively mild, and I have 3.23 gears, but I can fry the tires from a rolling start, and I mean fry. Must be the intake.
Carb is a 750 Demon, electric choke, and there are no cold driveability issues.

[Monaco Man 78]

any trouble with the air gap in winter conditions extreme cold.

[Monaco Man 78]

whats your cam specs peg leg.

[peg leg]

We get into the twenties in winter, and it runs well.
Cam specs:
Chrysler P.N. 5007551 hydraulic roller, spider lifter guides.
Intake 272, 208 @ 0.050".
Exhaust 278, 216 @ 0.050".
Lift intake, 0.472, 1.6 ratio arms
Lift exhaust, 0.487, 1.6 ratio arms
Lobe separation, 119*

My heads are the best Chrysler ever made for aftermarket small blocks (IMHO)
Mopar R/T, P.N. 5007950.

TTI 1 5/8 to 1 3/4 headers, 2 1/2" exhaust

Weighed the car yesterday: 3430 pounds.

[rumblefish360]

There is no real gain between the RPM and Air Gap versions. The air gap just doesn't have a heat crossover for colder/everyday driving.

Due to this, the only real advantage it has in running a cooler denser charge goes away for the most part once the engine warms up. The intake being aluminum heats up slower but will get hot and as hot as a regular RPM.

The advantage is seen on dyno or track and for a short time only.

Don't waste your money looking for HP on the intake change.

[pishta]

Originally Posted by rumblefish360

.... The intake being aluminum heats up slower but will get hot and as hot as a regular RPM.

Rumble, are you kidding? They make frying pans out of Aluminum because they conduct heat so well. They might cool down faster than Iron but they heat up well. Someone smart should make an aftermarket performance intake out of Delrin or some other high temp plastic (the Edelbrock Performer PVC line!) I wonder if Edelbrock could do a plastic pressure casting using there Aluminum molds. Doesnt Ford or Cadillac make OEM intakes out of plastic already?

[crisser]

Originally Posted by pishta

Doesnt Ford or Cadillac make OEM intakes out of plastic already?

Most all makers use plastic intakes now. Most use plastic valve covers as well.

[Monaco Man 78]

the rpm performer doesnt have heat cross over either, thanks for the suggestions guys, i think im prob going to stay with the rpm performer.

[rumblefish360]

Originally Posted by pishta

Rumble, are you kidding? They make frying pans out of Aluminum because they conduct heat so well. They might cool down faster than Iron but they heat up well. Someone smart should make an aftermarket performance intake out of Delrin or some other high temp plastic (the Edelbrock Performer PVC line!) I wonder if Edelbrock could do a plastic pressure casting using there Aluminum molds. Doesnt Ford or Cadillac make OEM intakes out of plastic already?

Ops, ment faster. Heat up faster.

GM makes plastic intakes and has done so for a while now.