I have searched and read and asked about it before! Can I buy just the computer and harness to run an existing TPI set up? also I see a Multiport option, could I convert over to true multiport and dump the bach fire? TIA

 

yes/yes.

 

The Fast EZ EFI is not compatible with your TPI. The Fast EZ EFI system is a throttle body injection setup. Your TPI is multiport injection. The Fast EZ EFI system doesn't control a distributor.

You can however use the Fast XFI setup. Your TPI is a multiport type of fuel injection. You can convert from the batch fire injector firing over to sequential injector firing but you'd need to add a crank and cam sensor. The improvement in performance and fuel mileage increase isn't very much for the amount of money you'd need to spend.

 

The more cost effective way would be the previous gen Holley setup; Commander 950. They have a harness to interface to TPI and it will run your distributor also (full timing control). It will not do sequential, but like noted above the small benefits over batch are not worth it.

 

FAST sells a harness/computer specifically designed for this, PN# 302000 IIRC. You'll have to use a distributor that operates independently of the computer, as the EZ system does not control spark. I'm currently running this same FAST system on an LT1 conversion, very happy with it
Check out their website, they have the instructions for the EZ EFI systems, and they even have a forum

 

If you want self tuning and compatibility with your existing HEI distributor, look at the new Holley HP system. We are using its big brother on a twin turbo/L80E project.

Rob

 

I have been fishing around recently looking for a newer system to run my basic TPI setup, with a LT1 mani on it....trick is, there is very little any aftermarket setup brings to the table that my stock speed density GM computer with chipset don't do already.....#1227730 computer, wired like '91 F body....and you got your HEI, injectors, closed loop, knock sensor, whole mess is done....and cheep out of a junkyard too, just make sure to get the harness and rework that, IF you can solder wires...if not, get a buddy who can....

 

I already have all this! and Im ready to scrap it! I have a S&P speed density harness, GM 1227727 ECM, 2 chips. I cant get it to run correctly!!!

Heres my bigger problem, My car is a 4 spd, My existing harness has a cable driven VSS signal . I have the TKO 500 ready to install, That spedo cable is completely different! thus no way to run that cable driven VSS signal! Im told the TKO has some thing that might work? but S&P cant answer me, and Kiesler has no answer either!

Im open to any suggestions! This has been a big problem from day 1! This should have been an easy EFI swap! Burning a chip takes like 2 weeks, from S&P and then its wrong, start over ect. Lots of lost time!

I would love work the problems out of what I have, Any ideas? TIA

 

I called FAST last week and they are releasing their FAST XFI 2.0 software next month. This gives the XFI system self-learning capability and is a software only upgrade, which I plan to do. $50

 

I was after a self learn system, but I did not want give up timing and what ever else the Ez Efi dosent run? But at this point Im willing to try anything!

MR. Force that Holley set up looks sweet! is self learn, plug and play? Any more info?

 

I'm not sure if you picked up on this or not, but FAST has two systems out. I'm not pushing it or anything, just an FYI. Don't get their dual sync distributor if you go this route; get a crank sensor. I learned the hard way.

1. FAST XFI (multi-point,sequential or batch) with the self-learning software upgrade coming out next month. Gives you control over pretty much everything.

2. FAST EZ EFI system, which is the Throttle body system.

 

whats the problem with there dual sync dizzy??

dave

 

is this statement backed up with proof, or is this what you have heard??

 

Seq vs Batch: When the LT1 came back in the '93 Camaro it was batch fire. In '94 they kept the motor but switched to a newer computer and ran sequential. I could never tell any difference in how the 93's ran vs 94's. At the strip they ran the same times (low 14's). From what I've read, the main reason GM went to sequential was emissions. Sequential may idle a little smoother in some engines, but that's about it.

 

PM sent

 

The FAST dual sync distributors, at least 3 years ago had some issues. My module was going haywire and I spent a ton of money on tuning before it was diagnosed as the problem. I put an MSD crank trigger on it and it ran perfectly from that point on. The crank trigger is the more accurate way to go anyway.

I have read a few other similar such cases. The problem may be fixed at this point.

 

 

Have you checked out BigStuff3? It was started by one of FAST's head guys when he split, supposed to be a good bit cheaper and user friendly.

 

Interesting, mine is a new one, no issue's so far, but for future reference can you tell me what problems you had??

cheers

dave