Is There A Complete New Efi Solution?

94Blue302GT · Mar 27, 2014

Ok guys, I haven't been on here in AGES, but here I am...
Simply put, if I built a motor... say a 347 Dart with AFR 185's and some fancy intake (Looking for 6500-7000 peak hp) is there any way to do aftermarket EFI with a MAF on this thing?
I know they sell the harness aftermarket at a few places, but I was having a hard time finding anything in the way of a computer. Using an "old" computer is not appealing for this setup.
Or do I have to forgo the MAF and use some jack in the box MAP universal system?

Right now it's theory crafting. It's actually for a boat. A boat I'm tired of doing only 50 in, lol!
As it's a boat, I would really really want stuff to be reliable and while my 94 was reliable, I don't want to put something that old electronically into my boat.
Thanks in advance guys!
Lee

Gearbanger 101 · Mar 27, 2014

If you're going to go to the trouble of an aftermarket computer and wiring harness, why go mass air at all?

rbohm · Mar 28, 2014

Gearbanger 101 said:
If you're going to go to the trouble of an aftermarket computer and wiring harness, why go mass air at all?

good question. the reality is that you dont need mass air for a specific application. mass air is nice for a factory set up, but these days the aftermarket systems are either very easily tunable, or they tune themselves more easily than a factory system does. the only reason to use a factory type system is the ease of troubleshooting by being able to pull computer codes to set you in the right direction.

personally i would go with something like a megasquirt system if you are willing to tune it yourself, or with something like a F.A.S.T. or edelbrock system that tunes itself.

94Blue302GT · Mar 28, 2014

Hmmm, I always thought maf was the way to go. Have had problems with my dodge and elevation changes.
Burnt plugs in 8 hours of driving through mountain before and never had that with a Ford maf vehicle.

In any case, those systems look good and costs weren't too crazy. This is a 3 year project at best so I will advise of build if it ever starts!

srtthis · Mar 28, 2014

big stuff 3 or the new holly dominator system... only 2 worth looking into honestly

90lxcoupe · Mar 28, 2014

I run a holley HP efi system, same as the dominator, except that with the dominator system you get more inputs and outputs. The inputs are used to monitor anything you want... literally anything that the car does, if you can put a sensor on it, you cant monitor and datalog it. The output are for things like electric fans that the computer can turn on or off.

MAF's arent needed one bit. I drove my car thru 5 states in 5 days and it went from 95 and so humid i had trouble breathing at times, to 65-70° and zero humidity on the last day and the computer didnt miss a beat. The fuel table is self learning so as conditions change, so does the fuel map.

stykthyn · Mar 28, 2014

If its for a boat why not a dual carb set up?

94Blue302GT · Mar 28, 2014

I know less about carbs, I like the tunability of a computer, and fuel injection "typically" gets better mpg.
I looked at it though for simplicity

bentley429isBAC · Mar 28, 2014

Holley.

MikeH686 · Mar 29, 2014

Isn't the Holley more based towards gm based motors?

revhead347 · Mar 29, 2014

If it were for a boat, I would just throw a carb on it.

Kurt

94Blue302GT · Mar 29, 2014

Maybe I don't know much about carbs, but wouldn't I have to re jet it for different elevations? We take it a lot of places. Figured efi would compensate for it where a carb wouldn't.
Doesn't efi also make more power and use less gas? Those both sound good to me!
Then again so does the simplicity of a carb.

What about e85 in either one? Do they make a flex fuel system? Sorry just daydreaming there

revhead347 · Mar 29, 2014

I don't know much about carbs either. I do know that most of those full aftermarket EFI setups aren't known for reliability. Getting stuck out on the lake because some small electronics has failed kind of sucks. The carb would be super reliable. Any change in performance between the two would be negligible. Fuel injection is a lot more efficient in cars, where throttle settings change constantly, and you idle a lot. On a boat where you have pretty constant power settings, it doesn't make much difference. It's the same with airplanes. The fuel injected piston airplanes don't get any better burn rate than the old carb ones. A change in elevation shouldn't require a re jet. It might not be spot on all the time, but it should be close. I would seriously talk to someone who does boat engines. The guy who builds my engines is pretty much the authority in boat racing engines. He builds for all the winning offshore racing teams. I don't think you are going to have much luck with your build. An engine that makes good power in a car at 6500-7000 rpms is different from a boat engine that makes power up there. The difference is duration. In a street car, you have it in that rpm range for a few seconds at a time. In a boat you have it up there for long periods of time. A valve train that doesn't fall apart in a few seconds in a car may not make it for 30 minutes at a time in a boat.

This is the guy I use, and about half of his business is high performance boat engines. Look through his website if you want to get some ideas.

http://expressenginesusa.com/

Kurt

stykthyn · Mar 29, 2014

Helped build a marine 350 once. Had to use a new cam, lifters, and springs to ensure constant hi rpm use. It was carbed from the get to so I can't say how to fit efi on one.

Is There A Complete New Efi Solution?

94Blue302GT

Member

Gearbanger 101

Straight Outta Locash

rbohm

94Blue302GT

Member

srtthis

the guy doing it does every local racers rear end

90lxcoupe

stykthyn

I want to measure mine. It doesn't look that tall.

94Blue302GT

Member

bentley429isBAC

MikeH686

Mine is only two inches though.

revhead347

Apparently my ex-husband made that mistake.

94Blue302GT

Member

revhead347

Apparently my ex-husband made that mistake.

stykthyn

I want to measure mine. It doesn't look that tall.

Similar threads

Is There A Complete New Efi Solution?

Member

Straight Outta Locash

Member

the guy doing it does every local racers rear end

I want to measure mine. It doesn't look that tall.

Member

Mine is only two inches though.

Apparently my ex-husband made that mistake.

Member

Apparently my ex-husband made that mistake.

I want to measure mine. It doesn't look that tall.

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