RB Intake Manifold and EFI (TBI)

Asking the experts.
I have a 69 Charger w/stock hood, 440 Indy EZ heads, Indy Dual Plane and currently an AED 1000 Carb. I'm wanting to go to a Holley Sniper EFI, however I've read that this system doesn't like dual plane intakes. Do you guys have any suggestions on a single plane intake manifold to accommodate the Holley Sniper EFI, compatible with Max Wedge intake ports and still get away with stock hood clearance? I do have 1 inch spacers on the K-Frame and a half inch spacer currently with a drop base air cleaner.

Mopar M1 P4876128, Edelbrock SUPER VICTOR 440, INDY 440-2.
If you had gone with port injection you would have gained 1.5" in hood clearance.

Thanks Rich. Haven't pulled the trigger yet, I'd rather have port injection. Can you point me in the right direction for that application?

You could get a Indy 440-2 and have Indy (or someone else) drill the bungs for injectors.

The Mopar 337 intake is MW size and low profile and it is semi-machined for injectors. But they are hard to find since Mopar Performance didn't really understand how good that manifold was.

If you can find a 337 intake somewhere and have it finished for port injection you would have a killer setup that would fit under a flat hood.

Thanks Andy!! Looks like I'll be on ebay and racing junk now until I find one.

How much better is port injection over TBI? Summit is showing the 337 Mopar intake however it doesn't ship until August 4th. About to pull the trigger on getting it.

Would you say that Mopar intake is better than the Indy -2 ???

I wouldn't say better - just different.

TBI:
* Intake charge is wet so cold start and warm up is just like a carb.
* Manifold determines distribution; therefore no individual cylinder control.
* Easy to install using non-EFI manifolds and most are self-tuning.
* Doesn't like dual-plane manifolds.
* Throttle body is as high as a carb.
* Can look like a carb and can be nicely hidden.
* Some TBI ECUs have issues with higher performance engines that have low idle vacuum.
* Some TBIs have trouble with ethanol in fuel, boost or nitrous.

Port:
* Sequential injection allows for individual cylinder AF control, but requires an EFI manifold.
* Dry manifold allows cold start and warm up control with no puddling.
* Allows any combination of throttle body configuration, single 4 barrel, 6-pack, 8-stack, turbo, any blower style, any fuel.
* Typical throttle body is just an air valve so it's shorter than a carb by about 1.5".
* Allows accurate "sizing" of injectors to engine displacement.
* ECUs can be tuned for any engine power lever and low vacuum - but most require some laptop tuning though all are self tuning once a base tune is established.
* Allows dry nitrous where additional fuel is added by the ECU.
* Easily recognizable as EFI. This may be a negative.

Here is a picture of a Mopar 337 intake. As you can see, the injector bosses are cast into the intake and there are standoffs which can be drilled and tapped to hold the fuel rails. It is a low profile intake and it is designed to be a Max Wedge port size. I'm not sure if they are still being made or not, I do know a guy who bought one recently from a dealer so there are a few sitting on shelfs.

It didn't help when Barton referred to it a Flower Pot, but at least we reinstated it back from NS1/dead status.

Summit lists P4876337 M1 intake manifold for $377.00. They say it will ship August 4th. Mancini also said they are on back order. If anybody has one for sale PM me.

Do they have one non max wedge?

Just ordered the 337 intake from Summit. Ships August 4th. They must know how popular they are as it was $377 bucks.

It's actually in between std and max wedge size. From what I know it's not been an issue putting it on std port head. I had mine opened up to max wedge size for some RPM's that were also opened up.

Damon

Any suggestions where I can send my intake to have it opened/matched to the Max Wedge ports?

Wilson Manifolds can do the port matching as well as adding the injectors and fuel rails. They charge premium prices but their work is top notch. I've had them do several intakes for me and they all come out perfect.

Thanks Andy. Any idea how much horsepower is being left on the table without the port matching?

Anyone ever use this Speedmaster intake? Or the new Edelbrock? Pro-Flow is probably shorter when you add the throttle and air filer to the single plane.
Looking into port injection this winter

Wish I could run one of those with a flat hood, but I don't think I could. I'm sure you could make some serious power with those long runners.

The Edelbrock Pro Flo will easily fit under a flat hood. It is much lower than the combination of an intake + carb + air filter. I know that it looks tall but it is much shorter than something like a Victor intake + carb + air filter. Maybe 2 inches shorter? I mocked one up on my '65 Coronet and it had tons of room under the stock hood.

I've never seen that SpeedMaster intake before. Obviously a knock off of the Victor 440 EFI. If it was me I'd buy the Victor EFI and get the matching fuel rails. Then you are all set up and ready to go.

Here is a picture of the ProFlo that I had for a while. (sold it on Moparts to a member)

I don't have a ruler in the picture but you can kind of figure out how tall it is by looking at the other parts on the engine. I think the Pro Flo is roughly the same height as a Victor intake plus a carb. So you are saving a couple of inches that the air cleaner usually takes up.

The hassle is the throttle body clearance around the thermostat housing and upper radiator hose and all of that stuff. I'm sure people have figured it out but I haven't seen a lot of pictures posted. There is at least one Moparts member who has a Pro Flo in his E body. I remember seeing pictures of it before and it looked really clean.

The good news is if you go CNP you can ditch the distributor and use one of my cam sync units. That eliminates a bunch of interference issues with the throttle body and the distributor and cleans up the front of the engine.

Dam. That's super slick. If I'd known that would possibly fit under my stock hood I'd gone with this setup. Those runners look to be a straight shot to the valves. Can it be opened up to Max Wedge ports?

You would need to add weld material to the outside of the runners to make it big enough to work on a Max Wedge. The Pro Flo has really tiny ports out of the box. More show than go. I bet they work great once they are ported but I've never run one.

Thanks Andy. After I receive my 337 intake from Summit I'll be sending it off to Wilson for the Max Wedge port work and having the bosses drilled for the injectors. I've been in contact with Rich and will be ordering the FAST XFI system thereafter. Thanks for the outstanding information from you and Rich.

The throttle body fits with a 90 on the water neck. Here's a CNP 440 using that manifold. It fits under a flat hood.

I've had both the Victor and Pro-Flo on my 493 in the Charger. The Victor with throttle body fits under the hood but I had to build a custom air cleaner. It worked but the intake air temp was quite high so I changed up to the Pro-Flo and CNP. Air intake was moved in front of the rad and reduced the intake charge temperature dramatically. I didn't find any real difference in performance but as stated, the Pro-Flo has small runners.

Looks good with the coils mounted on the side of the intake. Nice looking engine with the Pro Flo on there.

I wanted a proflow but it only supports a 90mm TB. So ill be doing a elbow and hiding the coils down low beside the block.

The 337 intake must be pretty popular. Summit revised the ship date from 8/4 to 8/14. Also went up on the price from about $250 to $377.

I'll be interested to see if you actually get an intake from Summit. They might just keep revising the ship date out..........

I don't think it is Summit's fault, Mopar Performance probably lies to them. I think MP waits until they have a bunch of backorders and then they ask the foundry to cast some intakes. So depending on where you are in line you might get an intake right away or it might take months.

I know a guy who grabbed several of those intake last time they were physically available so they do actually appear from time to time but I do not have any insight on when they will appear next. Hopefully you'll get yours right away. They are a really good intake once you get your hands on them.

Thanks Andy. If they revise them again I'll cancel my order and look hard at the Edelbrock pro flow intake.

Might be in luck Summit site now says ships tomorrow.