I'm trying to decide which intake I should use for my engine:

440 stock stroke
Trick Flow heads
1 3/4 headers
solid cam duration ~236 @ 50; .520" net lift (not ordered yet)

I would like to use a dual plane intake manifold and I'm torn between an Edelbrock Performer RPM (gasket matched) and an Indy dual plane.
Most people use the Indy on larger displacement engines (most reviews are for stroker builds) and Dunnuck Racing claimed it gave up quite some power at the bottom compared to the RPM.

So which intake would be better for my build?

For your combo, Performer RPM.

Performer RPM. The Indy is too big to keep velocity up for your application.

Thanks, that's what I thought. I was told that I should look for an intake that flows 20% more than the heads (TF heads flow around 300cfm @.500") - the Performer RPM doesn't hit the head flow +20% mark but the Indy almost does. Any truth to that?

You have to consider the whole package. In a full race environment, the Indy or a single plane would be better. With a street cam, and maintaining lower rpm, you don't need that big a manifold. The Indy will flow more for higher rpm, but you will sacrifice bottom end torque and throttle response. So I guess it depends on your usage. I've always considered street use as "light to light" driving. Where lower rpm acceleration would be beneficial.

Thank you! Yes, most of the driving will be on the street. I'll see if I can do some light home porting on the RPM (removing casting flows, gasket match with anti-reversion lip).

I agree that the RPM should work nice for your combo. Mine is a street car and I built a 493 for it. I use the Indy dual plane as I like to race sometimes when I can and it seems to work nicely for my mild 493. But for your 440 cubes the RPM should do nicely. The Indy dual plane can be in standard or Max Wedge ports and it kinda looks like an RPM on steroids. But for the more cubes of the stroker I like the Indy dual plane. Ron

If you are making any kind of power, I would think you are with a big block. I do not see why a single plane would not work on the street. I have a small block and it will smoke the 315/60 Drag Radials on the street starting off in high gear with a single plane intake.

What kind of compression are you going to run and what kind of car and how is it set up.

Yep, dual plane`s are for damn near stock motors in my opinion......kinda like vac. secondary carbs.......

Do a search, this one's been discussed a dozen times and my position hasn't changed.

As for the dual plane vs single, it's more about if you want maximum torque....lower stall and taller gears and higher curb weights favor the a dual plane RPM over the Holley Street Dominator...but not by much.

The Performer RPM is the Least dependent on the combo specifics, that means it will work well on a stock 440 and it'll work on a 600+ HP dual purpose car...or even a motor home.

I like the SD or the Indy dual plane better than the RPM...but not out of the box, they both need a bit of porting and they like a bit more "optimized" stall and gear.

If you're going to stroke it in the future, the Indy dual ported to MW will easily support 650-700hp, so there's more Upside if you have plans down the road.

Car is pretty heavy (70 Charger R/T), 4-speed and has 3.23 gears (won't change). Mostly street driven (95%) - that's why I'm going for a dual plane.

I have a Holley SD and an RPM at home so I can try both but no Indy DP.
I might stroke it in the future but not in the next two years. Leaving future upgrades aside which intake is better for my current setup: Indy DP or RPM?

I searched for the topic but I only found one thread where someone asked about the Indy dual plane on a 440 - all other threads were about the Indy on stroker engines (500+ ci).

The Indy would work for sure but I'm concerned that the runner velocity would be significantly less compared to the RPM.

Thanks

In my opinion the Indy DP is the one for you. The TF heads are more than just a mild build. The Indy intake ports are between the MW and stock 440. They are perfectly sized untouched for your needs.

The RPM manifold is way better below 2500 RPM than any single plane intake is, especially in 3rd or 4th gear when you need part throttle pulling torque In all truthfullness though I've never dyno tested or ran a Holley Street Dominator intake on any motor or cars I've owned or driven so keep that in mind please I bought a 440 one once but is was so ugly looking I sold it before getting up enough guts to try it