Thoughts on the FAST Ez-EFI system?? - Page 19 - Lateral-g Forums

**GregWeld** · #**181** 09-30-2011, 06:22 AM

^^^^^^^^^^^ Exactly what Chad said.

I installed (upgraded the firmware) last week on my buddies XFI system to the 2.0 "self tuning"..... it is NOT self tuning.... but will correct a "close" VE table. And here's t he sweet part of the deal. I used a "canned" tune from their library and she fired right up. A very little adjustment - and we went for a drive. The car never ran better. I still have a couple bugs to work out in one spot (1200 rpm light throttle) but that's it. So it's pretty nice set up.

TO OP: Call FAST and discuss your application.... and see what tune up they have that will get you started. My guess is they have one. But you definitely need a boost referenced capable ECU.

usa-69z · #**182** 10-01-2011, 05:41 PM

Heres a pic of my EZI EFI setup on an 8 stack crossram ..

**GregWeld** · #**183** 10-02-2011, 12:29 PM

Yeah -- nice -- but how does it run?? Are you happy with the ECU etc -- driveability.....

**camcojb** · #**184** 10-02-2011, 01:10 PM

I finally gave up on the EZ EFI on Charley's cammer Fairlane. It runs and idles nice, drivability is good, but it just won't learn the harder throttle areas. Stays lean, fuel pressure is steady. This is a 700 HP twin throttle body setup and probably never should have been used on this combo.

Couple things I noticed. The fuel pump they gave him for 700 HP is only a 190L pump that will not support that power level in my opinion. Also, I was having big problems with pressure and a loud fuel pump, turns out the filter they gave him is a carb style solid phenolic type filter, can't even blow through it. Swapped to a real stainless EFI 40 micron (on the pressure side) and fixed that.

My opinion is this system should work well on mild to moderate setups, but you need to go to a programmable system beyond that. We're swapping to an XFI for the Fairlane.

**GregWeld** · #**185** 10-02-2011, 02:27 PM

Jody -- You and I both know the EZ EFI was designed for super simple set ups.... mild cams with good vac signal etc.

The new XFI 2.0 is really a nice ECU.... IMHO a guy can just run the 2.0 - batch fired - with a simple MSD distributor and have a real nice system that is RELIABLE... and simple. I like the way the 2.0 mods the VE table.

usa-69z · #**186** 10-02-2011, 07:11 PM

Quote:

Originally Posted by GregWeld

Yeah -- nice -- but how does it run?? Are you happy with the ECU etc -- driveability.....

Greg , i purchased my manifold & 52mm throttlebodys locally (australia) and bought a harness and ezi ECU from fast . It all went together pretty easily as my manifold has a good vacuum plenum underneath it.. Once i got my timing spot-on it runs nice.. Starts very easily , idles perfect (with no iac too)
has very good response and a very broad tourqe curve. I think ive been lucky with my install as ive read most guys arnt this happy when trying to convert a stack setup electronically. There definatly is shortcomings with the tunability but as i was a complete novice with efi i went the easy route.
the induction has cost probably more than the entire engine but pretty happy so far.

Gav

**GregWeld** · #**187** 10-02-2011, 08:19 PM

Gav --

I've had fantastic success with both my 8 stack motors... I'm extremely pleased with the EZ EFI and my combinations. Both motors were built for EFI -- with wide LSA cams etc... and I love being able to just change only the A/F ratio and bingo - done...

Your car looks amazing! Love the cross ram set up.

**CarlC** · #**188** 10-03-2011, 11:07 PM

Quote:

Originally Posted by camcojb

The fuel pump they gave him for 700 HP is only a 190L pump that will not support that power level in my opinion.

Agreed. It's 140hp short if all the stars align.

A GSS340/255lph will get it done with 10% to spare.

**clill** · #**189** 10-04-2011, 07:03 AM

This all means I will probably have a EZ EFI controller for sale...

**GregWeld** · #**190** 10-06-2011, 08:23 AM

Quote:

Originally Posted by clill

This all means I will probably have a EZ EFI controller for sale...

Does it come "included" in the trunck of a track car?