EFI w/Dual plane manifold
 

I've read a few posts that the new EFI systems, Sniper/EFITech don't really like a dual plane manifold. I currently have an Edelbrock Performer RPM which is a dual plane manifold. What are my option?? Or is this not really an issue with the RPM ??

Subject discussed here.....

https://forums.holley.com/showthread...l-Plane-Intake


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Thanks. That was helpful ..

I put a FAST EZ 2.0 on a 455/PerfRPM for a friend, and it has ran great for about 2 years now.

Another EZ2.0 inst on 350 chevy, Perf EPS also ran great. I added a 2" open spacer and no differences anywhere.

I plan on testing several different intakes on my own 455/efi, on a chassis dyno, in the near future. Right hand is in a cast now though, not sure when I'll be healed enough to do it

Would cutting a notch between the two sides make any difference ??

first, try it unmodified. if no problem, then leave alone.

Next I'd try an open spacer. If that doesn't make a difference, then a notch won't either.

I ran my FiTech on a P4B for about a year and a half before changing my top end and going to a torker ii.

It ran fine on the dual plane manifold. There were a few cylinders that had a bit of distribution change over the other cylinders, but nothing that would cause any concern, or register any power loss on the butt dyno.

Run what you have, change it only if you notice a problem.

Sounds like the old "If it ain't broke don't fix it" is the way to go.