im going to put on a four barrel carb on my 74' 360. i need to now if edelbrock makes a air gap manifold to fit that engine. i tried looking on edelbrocks web site but it was down.if anyone knows anything please help

 

They don't have an Air-Gap manifold for FE engines. Soe of the guys here are working to convine Edelbrock to make one. Do a search on this forum for the air gap.

They offer the Performer, the Performer RPM and now a Victor manifold.

The Performer RPM is the choice among many of the folks on FTE. It will not hurt your low RPM torque much but provides plenty of flow for FE engines running hot setups up to 6000+ RPM.

The Victor is for race setups, probably not good for a truck.

 

The only thing that I wonder about the Performer RPM for street performance is the fact that on the FE's, it does not have a heat crossover, wich I know for performance is not wanted, but for those of us that live in a cold climate, unless you only race it, would not be a good thing. On other Per RPM's have the crossover's ?

 

I guarantee you will not notice a difference with the heat crossover gone.

Most of the stock intakes I have seen have had the crossover plugged with carbon, so it wasn't effective anyways.

I live in Colorado. Nuff said about cold climates.

The Performer DOES have the heat crossover if you are that concerned about it.

Just remember to get the right intake gaskets because some do not have provisions for a heat crossover (which should tell you something)

Josh

 

The heat crossover under the intake really isn't needed, as long as you have a healthy ignition system. I have always welded them shut. But if you think you need one, or even if you don't think you need one- there is a better manifold available. The Blue Thunder has a heat cross over, is a dual plane, and usually makes about 20hp more than an Edel RPM. The differance between regular and air-gap styles doesn't usually gain that much. Methinks the 'air-gap' line is mostly a marketing bonanza. The manifold you need is a BT. DF

 

I have talked to the guys at a local performance automotive shop locally here in Montana and if you bring up a question about an airgap the first thing they say is that you cannot drive them on the streets because of the cold air condition under the intake. I have also pulled many a intakes and found the passages blocked but you know what there was a reason I pulled the intake and it wasnot just to look and see if the crossover was blocked, The worst thing on an engine is to have to run it with the choke on so it will stay running.

 

I wonder if the local 'performance' shop realizes that the Y blocks ( 292s, 312s ) in the late 50s and early 60s all had 'air-gap'. And almost ALL of the pontiac V8s I've seen had air-gap. Didn't seem to cause them any trouble. How old are the guys you are talking to ? DF

 

I would side with the others in saying the Edelbrock "air-gap" manifolds are just hype. Especially since there really isn't much of a gap there, so what's the use?

Old Hemi (392) intakes were tunnel set-ups as well.

And how about those Ram Horn intakes for the Mopar wedge engines? About 3 feet long, now that is an air gap!

And guess what, no heat crossover!

Josh

 

Ya know, the Y-block along with a lot of the V8's from the '50's had air-gap intakes with a valley pan underneath. Thing is, they all still had a heat crossover. The old flat-four VW's had a simple "pipe" intake and it had a smaller heat crossover pipe right underneath it too.

You're right, the old Dodge max-wedge 413 didn't.

I believe the difference is between engines designed for street use and racing.

Don't want to get into a debate, just food for thought.

Barry

 

Ahh, hem! 4V "T" intake with exhaust crossover open, exhaust heat riser to force the exhaust gases through the intake, oil baffels in place (both of them), hot water spacer under Edelbrock 1405, 390 thermostat, 6 blade steel fan on a clutch, Ford fan shroud. 16 pound rad cap with 50/50 mix. Theres more...manual choke and Pertronix Ignitor through mallory coil, 8mm wires and Ford flat cap, long nose rotor and platnium plugs (Autolite). Ford 2 1/4 log exhaust manifolds with Flowmaster 2 1/4 dual in 3" single out. Runs like a "HOSS", I am so stoked!