LD340 v/s Edelbrock Air Gap

Mattax said
John may be able to speak better to this but the LD340 has large volume runners compared to the RPM.
I suspect the narrower cross section of the RPM runners better maintains velocity under low flow (low to mid rpm and part throttle) situation. FWIW it has been reported that the RPM made for brand C favors certain runners at high rpm.

I have an RPM to try out instead of the LD340 but never get around to actually doing it....
Click to expand...


For sure on the runner size. No dual plane is easy to port and in one split second I can break a 25.00 cable on my Foredom grinder are bend a 50.00 burr. But there for sure is more space in the runners compared to an Airgap or especially a Speedmaster intake.