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Someday I'll have to do a 7.3 build like this 6.0. I'd like more fuel that the heui can supply though.

All you need is a housing with a cam and a way built into the housing to feed fuel in and out of the unit pump. Here is a unit pump with the roller lifter...

Thanks for the explanation and information. I've never studied unit pumps or P-Pumps. I figured there had to be a relief valve that dumped the unused fuel. Ot was the only logical awnser. I get that a unit pump will be just like a P-Pump on fuel delivery, but be fully controlled via tuning...

If 200% only see 9k psi at the nozzle full song, I would be surprised. They run really clean and cool if they are at only 9k. I agree 100%. A 200% nozzle injector makes enough clean, cool power to rip your drivetrain apart towing. Even after all these years folks still say they can't make as...

I understand what your saying, and agree with it. As rpms go up pw goes down mechanically due to the MEUI being run off a cam. But, fuel flow is not lost. Since the amount of fuel supplied is mechanical off the cam. Having injectors that keep pressure in check at 5k rpm would probably not make...

Good question. They do it all the time in CR setups. This would require 8 instead of one. The simplest would be massive nozzles on the injectors. But, after a point it would only be good for high rpm work. Like hooked to a sled or drag strip.

Looks like you've been doing your homework Charels. I'm glad to see your serious about this. It's time the 7.3 got some love again. That's to bad mechanical injectors can't take the pressure. If they could that would be a simple bolt on solution from hypermax. Being the injectors off the mack...

If somebody would or could build the housing needed to hold 8 unit pumps we would be close to being done. Hypermax already has the valve covers and everything under the valve covers needed for the conversion.

P-Pump? Or the housing to hold the unit pumps? Looks like this thread is drawing some of the old names back to the forum. @Charles The hardest and most costly part of a MEUI conversion will be the housing and cam to run the unit pumps. I have no way of building either one. The unit pump...

I agree with that. I'd like that option thebest out of all three. The 3406E that I have run had crisp and quick throttle response. My deal is, which one would be easier to implement? Both are leaps and bounds ahead of HEUI.

I'm on board for sure. We just need hypermax to build us a custom block that can except the Unit pumps in the valley and then have a custom cam built to run them. Getting the unit pumps mounted and working will be the big hurdle. Everything after that would be simple. Hypermax already...

Put it that way. 400cc should do the job. But, if I have the ability to spin 5k I want 1500hp plus on tap there. LOL. The whole point in switching out would to get all I can up top. Why? Because I can. I have no doughts tuned and setup right the meui system would beat the heui to death. Even...

I've driven them. The last one is around 750hp and north of 2400ftlb. This was at the flywheel. It felt real good.

I've been researching the mack E7 unit pumps. The housing to hold the unit pumps would be massive. Bigger than a v style P-pump. That can be worked around. My biggest concern is, how do you control injection pressure? 400cc of fuel injected at 25k plus psi in a short time would be north of...

To bad swamps CR 7.3 never made it to fruition. I see your point though with trading the H for an M. It would be interesting if you would come up with a diagram showing how you would try to lay it all out.

Okay, I've always known the 3406E to be a EUI system. But the injectors are a Mechanical Electronic Unit Injector. Yes, that system could make big power. At that point I would think going CR would be simpler.

Have you visited with Jody from DP-Tuners to see if he has anything in the works for the 2020 F450? He does tuning for the 2020 f250/f350. He also offers a transmission tune only.

Charles, is there a place you recommend for reading up on MEUI? This sounds like a very interesting concept. I'd like to do some research on it.

Block it off? Delete it? Both options will work.