Thoughts on the FAST Ez-EFI system?? - Page 4 - Lateral-g Forums

**GregWeld** · #31 08-29-2009, 04:08 PM

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.

gmorris · #32 08-31-2009, 02:29 PM

Quote:

Originally Posted by GregWeld

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...

dhutton · #33 08-31-2009, 06:31 PM

Saw this over on LS1tech. Nice clean installation:

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

Don

BonzoHansen · #34 08-31-2009, 06:58 PM

Quote:

Originally Posted by dhutton

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.

**Steve1968LS2** · #35 09-01-2009, 07:07 PM

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.

**GregWeld** · #36 09-01-2009, 07:17 PM

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.

**Steve1968LS2** · #37 09-01-2009, 07:34 PM

Quote:

Originally Posted by GregWeld

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.

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.

**GregWeld** · #38 09-01-2009, 07:39 PM

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??

**Steve1968LS2** · #39 09-01-2009, 07:53 PM

Quote:

Originally Posted by GregWeld

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.

Vegas69 · #40 09-01-2009, 07:58 PM

I'll stick with my bucket and poor gas mileage.

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.