View Full Version : Intake manifolds

01-16-2014, 05:56 PM
Got an Edelbrock rpm air gap intake on my 340. Finish is the regular aluminum. Also have the Performer RPM heads. The engine runs great but I also have a performer RPM manifold that is not an air gap but is chromed. Advance plating chromed it for me a while back. Will I notice a loss of power if I do this or not enough to worry about? The chrome would look good on this engine but hate to mess up the way its running now.

02-08-2014, 12:03 PM
I'd call up edelbrock and ask them they could give you the flow numbers of both intakes and technical advice on whether it would make a difference and how.... and who knows depeding on cam/ compression and all you may actually gain a little

02-08-2014, 05:52 PM
The Air Gap is a higher RPM manifold. If the 340 has a mild cam, the Performer will still work great.

02-18-2014, 10:18 PM
Don't think you'll see too much difference. Still a great manifold.

02-22-2014, 09:59 PM
Thanks for all the replies. Engine has a Hughes 1928 cam 489/524 lift 219/228 duration 111 LSA SRP pistons Eldebrock performer rpm heads. engine build sheet from machine shop shows 10.8 to 1 compression. Holley 700DP carb MSD 6AL ignition. The rpm performer air gap manifold works very good on the engine. The other manifold is also a a performer RPM but not an air gap. If I change it out it will probably be for looks and not performance. The air gap will be hard to beat I believe for performance, I just wanted to know what everyone's opinion was of the two manifolds. Thanks