Hey guys
I am peeking at White Racing web site and looking at their plug N play wiring harness for my car 93LT1. Damn their plug N play harness cost $472?? for the DFI Gen 7 hook up. Fast track performance don't list their plug N play pricing.

 

The white racing is the way to go. Fasttrack sent me Junk after 3 months of waiting for it. Did not do what he said it would do and threw every code the gen7 had at me. When I called him,I think his name is mac, he made me feel as if I was the stupid one. His harness could not have posiblely been the problem. Its a plug and play harness for christ sake how hard could it be. He refused to help me when I called him. His unit was I think around 700.00 and was not worth 10.00 unless you need some wires and connectors to make your own. He also said no refund it was my problem. The white racing one worked well for me and the guy there took my requests and wired it the way that I wanted him to. (he enable some stuff and used factory gages that the fasttrack system would not do. Not that the fasttrack system worked at all, but he claimed that it could not be done. yes it can and white racing did it.
Dont waist your money like I did call White Racing. and speak with, I think his name was Dan. Good Luck

 

I have a Fasttrack harness on my car and it was right around $700. I didn't have any of the problems that were previously mentioned. I talked to Mac about 3 hours before I bought the unit and it worked exactly as he said it would. No issues.

Ron

 

I also have a cut-in harness from Mac.. no problems here....worked just as he said it would....

 

http://forums.corvetteforum.com/showthread.php?t=989131

 

That's a great deal if he was going to run FAST. I think he's going with DFI Gen 7 which is a different harness.

Ron

 

I bought the Gen 7 Harness from Mac at Fast Track and it worked great without any problems. He's a great guy to talk to on the phone. When my Accel DFI Wideband was broke he sent me an Innovative unit to borrow while it took them a week or two for Accel to send me a new one. Definatly a stand up guy in my opinion. I'll be ordering more stuff from him in the future.

 

Let me clarify some of the problems that I had. I would agree that Mac will give you all the phone help in the world, very patiant guy. The guy who builds his harnesses lives in Alvarado TX. and Mac I think lives in CA. can't remember. Anyway from the first time I hooked up the system it was throwing codes. I bought the whole system from Mac Gen 7 wideband o2, injectors and all. about 3000.00, but he seemed very helpful and knowlegable and was pleasent. I called him every day for a month or so it seemed like.( you spend that kind of money you expect more.) some of the reasons for all of the problems was That the wide band o2 was wired wrong and he sent the wrong map sensor with the wrong conector the 02 was wired wrong and caused the car to run super lean but read it was rich. I called him and he told me to disable the 02 code that it was just because I was trying to tune it. so I did. Brand new 383 billet motor dead before got one good run out of it. It heated up to the point that it burned holes in 2 of the pistons and cratored one cylinder wall. ( I was pissed) The 02 wiring problem was discovered by the local speed shop after the death of my motor, I called Mac and explained. he said I was on my own. never called me back again and never answered the phone or e-mails when I called. I then just accepted my losses after a while and went to white racing. Mac was great at first no complaints but once there was a problem and it was clearly his product that caused it. He bailed never to be heard from again. I was out about 8000.00 for the new motor and the car has not ran in a year. Thanks Mac for all your help!!!

 

Your right. Sorry about that. And sorry to hear about losing that much money to somebody else's mistake.

 

I'm doing a similar thing on my modified '85 w/supercharged LT1. Alot of custom stuff goin on and I'm at the point where I need to start addressing how I'm going to operate this thing.

I've started reading about these harnesses and was curious if they still use the original ECM or if they simply piggy back it with the Gen 7 or Fast system? If it stays, what does the stock ECM still control? Does it stay stock?

Any help will be greatly appreciated.

thanks

Andy

 

Bruce, call me if you need a Fast Track harness for GEN7. I can get them made for you. Don't buy a White Racing. If you use it with their harness, you Sequential mode will never work. Thats because White gangs all the injectors together, its an EL-CHEAPO wire job if you do that. Not to mention its a totally bad design from a engineering stand point. What I mean is that the GEN 7 or a FAST for that matter has 8 injector drivers, why disable them with a harness that gangs them together?? I don't know about you but if I were to buy a aftermarket ECU, I would want full functionality from that ECU.

 

Andy, it depends on the model year Vette that you are working on. In the later years, the PCM or ECM controlled the TCC at minimum after the fuel controls, later they also controlled the TCC, and complete transmissions control and they talked to the CCM which gave you the dash functions. Which included the MPG display, speedo, HVAC functions as well.

Most people will piggy back the aftermarket ECU on top of the factory ECM. It is transparent to the factory ECM, in some cases a custom chip is burned to disable codes that may pop up on the stock chip. In most cases it is not necessary. I have found that the TCC operation is best left to the GM ECM. The DFI Gen7 ECU can operate it but I have found that its not nearly as good as leaving it to the GM ECM. It is a native control for the TCC which works much better due to its firmware from GM.

 

Thanks tjwong.

The car is actually an '85 but I've installed a '92 LT1. I intended to use an '89 ECM to operate the engine with a crank trigger. The opti is disabled other than just acting as a distributor. The trans uses a TV cable so TCC isn't a problem with my application. I've got a Vortech LT1 kit installed on the engine right now and we've modified the intake so that the throttle body is actually in front of the supercharger (used an LS1 style 85mm throttle body) and the original throttle body has the butterflies removed. Don't know if it will all work but i'm getting anxious to find out and I'm just learning as much as I can so I don't have to do it twice. I guess the only thing that my ECM will operate would be the dash functions?

Steep learning curve going on here.

thanks for the input!

Andy

 

Andy that would be about the only thing your ECM would be running. I can't remember if your car has a CCM or not but I don't beleive it does. In that case everything else is controlled by manual means other than by a smart device. In the later cars, from 90 and up there is an CCM involved that the ECM also has to talk to. That device would be controlling the AC and other body functions, it also controls the dash but takes a serial communications input from the ECM to give the dash information to display. You could have had your intake modified to accept a distributor then there wouldn't be a need for a crank trigger. Take some pictures of your engine bay, I am sure others would like to take a peek at what you have done.