Porting Edelbrock RPM air gap

[matt030305]

Hey FABO, I plan on gasket matching and conservatively porting my edelbrock air gap this week. This will be my first port job and I noticed how the air gap has one side for the bottom runners and another side for the top runners. Im just worried about cutting into a runner accidentally.

Does anyone have any outlines or guidelines to port the intake? Thanks!

 

[TT5.9mag]

I’d cut the divider down about half way if it isn’t already, then port match it and go up the runner about 1 or 1-1/2” and then send it. You will likely not make it any better than it already is. In fact you could make it worse.

 

[roccodart440]

Port match and blend it up from there. That is a pretty good intake, perhaps the best dual plane available. If you want something beyond a port match and blend, i'd be talking to an expert, like IQ52. He ported my intake. While he is retired, i'm sure he can answer your question.

 

[PROSTOCKTOM]

Do not remove any metal from the floor.

Tom

 

[forphorty]

Here's an article where an RPM Air Gap for a sb Chevy was ported. Flow bench and dyno results ,before and after. Porting the Air Gap resulted in less hp below 6000 rpm. https://www.hotrod.com/how-to/hrdp-0802-chevy-intake-manifold-porting/

 

[roccodart440]

At least in the case of big blocks, when it comes to induction, you truly can't compare GM to Mopar. GM likes restriction before the heads, Mopar does not. You'll also see that peak RPM in a BBC will be higher with any given cam grind vs. BB mopar. I'm not saying that based on reading anything, i'm saying that based on various engine builds and dyno time.

Now whether that applies here, or not, IDK, but I wouldn't be making a decision based off a magazine article about a SBC test.

As I said before, I'd either port match and blend, or I'd be talking to a porting expert, such as @IQ52 or MCH, etc.