FAST XFI or Holley Dominator or ?

[Steve Chryssos]

We love or self-learning Holley EFI system. Prior to this self-learn technology we'd always fly-in a tuning expert to get results. On a private jet. And put him up at the Ritz Carton. And call in the escort service. Good tuners were and are still in high demand, but for relatively mild engines, self learn EFI has it's place.

As Greg stated, decent vacuum, is important for good results. We fired up our Holley EFI on a fresh engine with only moderate vacuum. Moderate vacuum means a little more manual tuning is required. Ring seal is important as well. After a while, the self learn mode will start to second guess itself, so turn it off and let the standard closed loop function do it's thing.

DIS is not required. Taking that point further, you can get your self-learning EFI up and running with just a standard ignition, then add DIS down the line. Greater spark resolution IS beneficial for getting the most from your engine. A standalone Electromotive XDI kit is the hot ticket there. Good people.
http://www.electromotive-inc.com/products/xdi.php

[Steve Chryssos]

It's not the most in depth article, but you might find a pointer or two in my Holley EFI install series. A lot of what applies to the HP also applies to the Dominator:

Holley HP EFI pt 1

Fuel System

[supremeefi]

Originally Posted by streetfytr68

We love or self-learning Holley EFI system. Prior to this self-learn technology we'd always fly-in a tuning expert to get results. On a private jet. And put him up at the Ritz Carton. And call in the escort service. Good tuners were and are still in high demand, but for relatively mild engines, self learn EFI has it's place.

As Greg stated, decent vacuum, is important for good results. We fired up our Holley EFI on a fresh engine with only moderate vacuum. Moderate vacuum means a little more manual tuning is required. Ring seal is important as well. After a while, the self learn mode will start to second guess itself, so turn it off and let the standard closed loop function do it's thing.

There are few problems I have with a self learning systems.
One is just as you mentioned. They will have a tendency to chase their own tail on more than a mild build.
Two, if you're a novice and don't know what the correct air/fuels are to enter in that table then guess what, it'll try to hit what may be wrong target air/fuel. At that point self learning is useless.
Plus you still also have to do cold start, enter the right spark curve, play with the transient fueling tables etc. It's hardly ever the end all.

And when it comes to having qualified personel to help I'm with you 100%. There are too many "tuners" that simply don't have a clue. I've probably done or redone more tunes succesfully via the internet than some have sitting in the front seat. There are few examples right here on this site. And some of those were on "self learning' systems. Unfortunately there are a few who are in it for a quick buck and then off in the sunset they go.

Get a system that meets all your needs/wants and secure the help you need, before you get too far into it.

Thanks and best of luck in your project!!