We have been using the new Holley HP system. It takes a lot of the guess work and for most set ups it is plug and play. We just did a coil on plug ignition (LS style) on a conventional small block. It was pretty cool. check it out in our test car section Also take a look at the carbon fiber intake plenum

http://customworksproducts.com/our-test-car.html

I'm looking at putting the FAST setup on a very mild 364 nailhead Buick, I'm wondering how that would work out.

I think it would work pretty well. As with any FI system, just make sure the fuel supply is solid. Also, in the discussions I have had, make sure you hook the power and ground from the controller directly to the battery. No junction blocks. Other than that, answer the questions on the controller and off you go! :cheers:

Just as easy as Chad said.... trust us!

The key to EFI is that the INSTALLER tries not to think he's smarter than the EFI and just follows instructions. Most of the issues I've seen are self caused by the installer thinking they knew more than the system... WRONG!

I should be safe then, I'm sure the EFI is smarter than me :lol:

We frequently install the new holley HP system. In our shop we tune lots of different systems, and the new Holley stuff is slightly ahead of what else is out there. They have an Avenger system that uses a handheld controller and comes with a TBI unit, similar to a EZ EFI system, and it is completely upgradable to the HP system with just a software change, and can use a laptop. We have a video on our site www.customworksperformance.net under the EFI tab

Hey I will chime in here too...... we put the FAST ez efi on a 401 nailhead this summer, and it is AWESOME. We also just finished a Holley HP setup on a vette, and it is AMAZING. Both have their merits.... the Holley system is more advanced, and has way more potential, but it still has to match the application. For a fairly stock nailhead, the FAST is perfect and works so amazing. Our customer can't believe how well it works for a cruiser (by the way he owns both the fast and holley jobs) and how well the nailhead runs. It really is like a new car.

My opinion though is forget the FAST plumbing kit option, their pump sucks (sorry FAST) and go with an aermotive in tank on your factory sending unit. They are affordable and work way better. If you have to do a frame mounted pump, I just used a holley HP and it is a great option. Quietand no cavitation/air lock like the fast pump.

I agree, if you want a trouble free system for a stock motor the Holley Avenger is a better way to go, plus you can always upgrade it to the HP system with just a software change.

The self learning feature is exactly what the EZ EFI does but now you can see it, limit the correction, set how quickly it learns ect. All the EZ EFI development was done with the XFI.

It isn't as plug in and run as the EZ but for more than 500hp it is really the way to go.

Personally I still stick to the sequential with cam sync.

You have to run a vac reference to the regulator because the EZ does know how much fuel pressure you are running. If you don't it wont work properly.

All engines with EFI should have the vac referenced to the regulator.. here is why.

You are trying to tune the fuel curve. If the pressure/vac below the injector changes.. and it does, if you don't compensate for that you will be tuning the fuel curve and the pressure differential too. By keeping the pressure differential constant the ecu just tunes around the actual fuel curve and not the curve and pressure differential. Pressure across the injector remains the same.

This is a basic setting on the EZ that "Bob" forgets. When you enter the fuel pressure in the hand held, it is asking that because it is using the engine vac to determine what the fuel pressure is and tuning based on that.

This is basic EFI101 but even some of the "experienced tuners" out there miss this one.