Manifold height?

[Confusedcuda]

Is there any difference in the height of the intake manifold between a Edelbrock RPM and A air Gap RPM. The Gap RPM would work good on a 340, correct?

 

[demon seed]

According to Edelbrock the heights of both are the same at 4.9" front and 5.8" at the back and I'd go with the Performer RPM if your engine is a mild mill.

Terry

 

[73DartSport]

I think I would have to agree here. If you're not going to Drag the car, just like we talked about in your other thread, I just don't think you will get the use out of an Air Gap. For most street applications anything from idle to 6500 is plenty and if I remember right the Performer RPM is advertised in that range. Same with Weiand's Stealth Intake. Lots of brand options out there and most of them are going to perform about the same. Some may be a little smoother as far as the ports are concerned which will help flow, but most likely not enough to be noticeable unless you are trying to pinpoint ETs for the drag strip.

 

[AdamR]

The air gap and rpm are the same intake other then the open plenum and lack of heat cross over on the air gap.

I doubt anyone could tell the difference between the 2 on the street.

 

[rumblefish360]

I have the Air-Gap on my 360 which is an excellent intake. The gap will increase warm up time much like a big block needs time to warm up. So, when it gets cooler outside, chilly like, and the car needs a minor warm up time, add 5 min.'s to it with the air gap on.
That's it.

Just use with a cam in it's RPM range. It is fine on a stock 340 due to the cams normal RPM range.

 

[dodge freak]

I ran my motor for like a year and a half with the crossovers blocked. Then for the next winter--which I only drive it when the roads are clean--I removed the exhaust crossovers shims. Motor ran better all the time, even after driving it for a 1/2 hour. Next spring I left it alone, was running so nice and clean, the plugs were not getting dirty and needed to be clean like before, I left the exhaust heat open when summer came. When its 80+ yeah, maybe then blocking the exhaust heat might be good but where I live even in the summer its not 80+ at night time.

Here in Michigan I leave the exhaust heat open year round, 90% of the time its the best way for my motor.

Blocking exhaust heat is for high compression-12-1 and up and or high heat, 90,100+ degress weather, like Texas, AZ, FL.

IMO