Thoughts on the FAST Ez-EFI system??
 

Hey guys,
I ran across an add about the new Ez-EFI system from FAST. Does anyone have any opinions on the system? It looks to be a pretty good upgrade for a weekend cruiser to increase driveability. Thoughts?

http://www.fuelairspark.com/ezefi/

Anyone?

I just got off the phone with Carl Wegner of Wegner Motorsports fame. Had a 1 hour conversation about the EZ EFI and long story short, he loves it! Has been dyno testing it and said it makes the exact same power as a 4 barrel of equal size, but has all the driveability of the fuel injection.

Sounds like a cool easy system, I am going to try one on something very soon.

BTW, we have FAST products.

I've used the older FAST stuff several times and loved it. Off of those experiences I would think this system would work great, as long as you weren't doing a forced induction or wild setup.

Jody

600 hp cap is kind of a bummer. I like the idea of keeping the stock carb appearance but I know I'll end up bumping up my power level eventually and I'm already at the ceiling.

Contact Wegner Automotive, I think they will be able to sort that issue for you.

The cap is 650 I believe if you bumped up the fuel pressure to 60PSI.

Page 30 bullet point #4:
http://www.fuelairspark.com/Instruct...-%20EZ-EFI.pdf

I'm not that serious at this point. If I do make a change it will be 100hp minimum though.

Just a general comment. Products like this are so Good for the hobby.

A+ to FAST for making it.:hail:

Supercharger!

Naaaah....540 and solid roller.:D El Natural way.

VERY NICE!!! My man!:thumbsup: :cheers:

If the limitation is only fuel and you have enough pump (and I do) shouldn't one be able to swap injectors and up the max even more? Unless the limit becomes airflow through the throttle body. My 540 dynoed at 750HP and I would love to try this system as it would allow me to keep my port matched intake. My fuel system is already built for EFI with an A1000 and full return system.

Ok, question for you smarter guys. What really makes this better than say Holley ProJection TBI or similar TBI setups? That all this basically is, right, TBI, albeit with what appears to be a much neater, compact install? The ECM/electronics? At 43psi it does seem to run much higher fuel pressure than common TBI systems.

And how might this work on an LS1 with a carb intake? I guess you'd still use the msd ignition unit used for carbed LS motors and follow the directions for CD ignitions. Reading the instructions has raised my interest in this a bit.

Just get one of the tall deck Dart blocks, and go for a super stroker something over 700cu :unibrow:

I agree. I would think injectors would do the trick. I don't think airflow would be an issue. I have talked with FAST about this system. You have to disregard some of what is in the instructions. Some of the options they speak of are coming, but not available yet. They said the next 90 days would show more with this system. My eyes are on it. Very interesting.

EZ EFI is a learning program. Teaches and tunes it self.

Street Rodder did an install and loved it.. very easy to install.

I will be installing one on a dyno engine for a story and then will be putting it in a certain well known second gen for some "real world" evaluation.

The only downside is that it's only viable up to 600 hp, but it still covers a majority of the people out there.

Will report on how well it goes on in two weeks.

The problem is that there are only four injectors, so it's only possible to support so much horsepower. It's not like you can put 95-lb injectors in there. lol

I forgot what the calculation is for injectors based on HP is.. I need to look that up.

Yea, it's easier... The main difference is that you don't even need to change the intake, so it's closer to being like a carb swap. I don't know whay it wouldn't work with an LS engine.

I think I'm going to do some homework on my options and try to compare cost/benefits.

I am interested in using this on my 71 Ford F250. The 390 is going to be rebuilt next month. It will have about 370hp with 460ft lbs. My problem is that the truck has duel fuel tanks and there is no way I know of to due a fuel return. Can anybody answer this for me?

Blessings,
AMS

Well, the system doesn't HAVE to return to the tank it's drawing from, but it can't return to a full tank.

Maybe a valve to move the return when you move the feed. Just don't forget.

Or cross the two tanks together if they are close enough to prevent one from becoming "over full".

In any event I don't see it as being a difficult problem to solve.

I guess my biggest question is how the stock fuel system is modified to work with this system and if you need to run a return line to the tank.

"FAST™ engineers set out to develop the ultimate fueling strategy for the EZEFI ™. The EZ-EFI™ features patent pending technology with the most advanced self tuning control strategy available anywhere today. Simply hook up the four necessary wires and any optional wires, answer the basic setup Wizard questions on the included hand-held display and the system tunes itself as you drive. Countless research and development hours were spent on a number of prototype test vehicles to develop a high-quality system truly worthy of the FAST™ brand.

Capable of supporting up to 550 horsepower engines, the FAST™ EZ-EFI™ Self Tuning Fuel Injection System can be purchased as a complete system, including the ECU, wide-band oxygen sensor, wiring harness, fuel injectors, optional fuel pump kit and other assorted components, including the innovative 4150 Throttle Body from FAST™.

The FAST™ 4150 Throttle Body delivers the total package approach for anyone with an existing 4150-type intake manifold. Everything comes with the kit, including appropriate fuel injectors and fuel rails. In addition, it works with the original carb-style throttle linkage & is ready to accept all OEM sensors.

You need a different bypass regulator, fuel pump, for starters.

you will need a return line to the tank. I deally you need baffling added to the tank, or run a separate surge tank or custom efi tank to control fuel slosh picking up air in the system. But technically the stock tank will work with an outlet and a return line, but you'll want to keep the tank close to full level-wise so it doesn't suck air which is an immediate studder or engine shut off with efi.

Jody

I'd do the DUAL fuel tanks with a crossover line (or two - One top and one bottom) like my boat fuel tanks are done. Be sure to add shut off valves! With crossover lines open - both tanks will seek their level so always having fuel in the one you'd be drawing from.

Barring that "fix" -- you could use a "Y" feed from both tanks - and a return "Y" to both tanks.... but I think I'd prefer a single feed and single return with the X over for simplicity.

Posting here to try and keep this thread going. I am very interested in this system but my HP is slightly above the range listed by them. I saw somewhere in this thread that the HP could possibly go up, then again Penny posted that it will be limited because of the fact it has fewer injectors which obviously makes since. Just hoping FAST will be able to squeeze a little more out of it and then see somebody try it before me. Any guinea pigs out their:unibrow:

It's just a matter of math.. when you only have four injectors to work with you can only support so much power, even with massive injector sizes.

I think FAST just told me it can go to 650 hp.. I will confirm.

We are dyno testing it on Tuesday.

edit....

FAST makes a product EZ-EFI I think it's called - self tunes as you drive... uses all the simple four barrel carb linkage -- and tranny linkage etc.... I didn't read the whole thread so maybe you're aware of this system as well??

Just FYI.

LOL...could have at least read the title...

Saw this over on LS1tech. Nice clean installation:

http://www.ls1tech.com/forums/conver...ebird-ls1.html

Don

Nice. That is what I pictured. I'm still contemplating that, but I still think it is cheaper for me to run the EFI carb-style intake.

Ok.. we tested the EZ-EFI today..

Installation.. WAY easy.. all the sensors along with the fuel injectors are contained in the throttle body. The only external sensor is one for water temp and of course the O2 sensor.

The interface is very easy to use. Install the unit, start the car and let it get to the specified operating temp (around 180-degrees). When you are in that area you hit a button and voila! it starts tuning itself.

Oh, there is one section where you set your AF ratios at Idle, Cruise, and WOT. You can also set a rev limiter (cuts fuel).

Once you make changes it takes a while for the system to "learn" and turn itself. So if this was in a car you would want to set it then drive around for an hour before you could consider it educated (although it always learns).

It bases most of it's tuning on the O2 sensor but there is an IAT and MAP sensor. It does NOT change the timing.

Fast says it is good for 550 to 600 but we found that in our test it's good for up to 500 crank hp. It's not that it runs out of fuel but more that it runs out of air.

We tested the unit and then swapped it for a carb. A 1000 cfm carb made more while a 750 cfm (4150 Holley) made almost the exact same as the EZ-EFI.

The rest was great.. the engine fired right up like it was an LS engine and once it learned the settings it was as happy as could be. Install was a snap as was tuning. For the $$$ it's a great option for those with moderatly powered engines looking for EFI on a budget.

There will be a dyno story in Super Chevy and a car install story in Camaro Performers.

Let me know if you have any questions.

Steve --

Great post!

I'm going to use an LS6 (ZO6) motor in my '37 Ford -- and I don't like the looks of the modern "stuff" in a car like that -- so was going to "CRABerator" it... so it'll look more at home... but now maybe I'll do this as it would look the same but have the EFI benefits.
:thumbsup:

It would seem that as long as your not trying to make much over 500hp then this system would be perfect. It certainly lived up to the "eazy" part.

There's not as many tuning options as the fancier systems, but then again, that was the point.

Steve --

Do you think - or did you run - a "cam" -- with a little thump to it??

I was thinking that with the carb on the LS6 -- I would upgrade to a Comp Thumper Cam -- They have a couple of them - but would use the 'mild' version. I would assume the EZ tune would allow for this??

It was actually a pretty lumpy cam in a 454 alum headed big block. It worked fine but I think it would run even better with a less "wild" cam. The reason being is that it uses the MAP sensor to tell if you're in WOT, Cruise, or idle.. so it's looking for manifold pressure which is always low with a more radical cam.

Should be fine with a thumper cam.. the main restriction seems to be how much air can be pulled through it.

I'll stick with my bucket and poor gas mileage.:D I bet they come out with a bigger version if this becomes a success which it will. I'll let them work through any potential bugs in the coming months as well.