New EZ EFI Stack 482FE build results

philminotti · #1 (**permalink**) 03-04-2011, 09:15 AM

Keith-

Good to hear about the FAST system. I've been thinking of switching.

I have a question for you. I have one of your hydraulic rollers in my 482: 248/252, .633 lift, installed with an ICL of 108*. I have a mass-flo port fuel injection. At 1000 rpm with no load, I see 6-8 mm Hg manifold vacuum. At 1200 rpm no load, I see 15 mm. Varying the ignition timing doesn't significantly alter this. I've had the intake on and off several times for other reasons, with no change in vacuum after reinstall. I threw an old Holley carb on it, no change.

Any thoughts on this vacuum? Secondly, will the FAST system have a problem with this level of vacuum? I've been pretty unhappy with my Mass-Flo system.

Thanks.
phil

FWB · #2 (**permalink**) 03-04-2011, 09:44 AM

keith,
what piece of equipment did you use in your shop to drill out the oil galleys in the center oiler? 2 feet length of cut?

just curious......

Fred B.

Keithc8 · #3 (**permalink**) 03-04-2011, 10:49 AM

Well I think that you would need a smaller camshaft for the Mass Flow possibly even though they say that is not the case. I will check on the lower vacuum to see what the guys at Fast think on this deal. I have used the Mass Flow set up myself but feel that it is limited on the higher HP stuff. I know some people go into the computer on it and mess with it by doing a chip or using a programmer.
On the block we use our RMC CNC block machine. We have a program with locations in it that we set up on to do this. Have to drill from each end and meet in the middle so it has to be pretty accurate. We also have to drill the connectioning galleys from the valley down as well and then tap all holes for pipe plugs. We charge about 400.00 to do it to a block for someone.

Thanks, Keith

bobcowan · #4 (**permalink**) 03-04-2011, 11:31 AM

Quote:

Originally Posted by Keithc8

You can preset the air fuel that you are shooting for in the box and then it will work and self tune to get there. We played with the fuel pressure some as well.
Thanks, Keith Craft

I am using an older Haltech system. It works well, but it's strictly open loop for me.

Do you set a specific AFR in each cell? Or do you specify a range?

Quote:

Originally Posted by philminotti

Secondly, will the FAST system have a problem with this level of vacuum? phil

I have the same question; my engine gets a very low vacuum signal. Does itt have to have a solid vacuum signal? Or can it run on TPS and RPM only?