FAST XFI 2.0 Install
Safety Car
Joined: May 2002
Posts: 4,659
Likes: 82
From: Toronto ontario
I removed my ecm and entire engine harness and laid it out. Just made new wiring and re-used the gm connectors from the old harness. Just went 1 connector at a time so not to confuse things.
Melting Slicks
Joined: Mar 2002
Posts: 3,108
Likes: 126
From: S.L.C. UT
White Racing makes a wiring harness adapter that will allow you to plug the FAST box into the stock harness. That's what I used. The other side to it our wiring is getting pretty old so if there are issues, a new harness is good. I guess it comes down to what kind of shape the wiring harness is in.
Pro
Joined: May 2008
Posts: 670
Likes: 55
Are you also going coil on plug? Are you going to use the opti for cam sink. to get sequential fuel injection? Will you be using a crank trigger? Good luck with your project, I want to do something similar this winter for my 93.
Safety Car
Joined: May 2002
Posts: 4,659
Likes: 82
From: Toronto ontario
His is a 91, no opti. I'd guess he'll be using a dual sync dizzy .
Burning Brakes
Joined: Nov 2010
Posts: 1,006
Likes: 2
From: Spartanburg South Carolina
When i wired the fast box in my car i went the route of a new harness. Took the old harness completely out of the car, laid it on plywood, nailed it accordingly, peeled back the sheething, removed all duplicate and unnecessary wires, and put it back together. Took me about 2 weeks and alot of reading of the factory schematics but it came out great and looked factory.
The new harness also had larger gauge wire, the older wire seemed to be getting brittle. at least in my car. If yours looks in good shape use the adapter Jim mentioned!
The new harness also had larger gauge wire, the older wire seemed to be getting brittle. at least in my car. If yours looks in good shape use the adapter Jim mentioned!
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Instructor
Joined: Aug 2002
Posts: 157
Likes: 0
From: Kingsville Ontario
Safety Car
Joined: May 2002
Posts: 4,659
Likes: 82
From: Toronto ontario
The benefits of tuning were simple awesome. To be able to do it myself was a valuable experience and a money saver too. The real reason I went this route over 10 years ago was to spin 8000rpm. Factory ECM has no maps beyond 7k I believe and the opti spark ... Not sure how long it would last spinning those speeds.
Thread Starter
Advanced
Joined: Sep 2004
Posts: 61
Likes: 0
From: Las Vegas Nevada
Thanks all for the information, I am using the FAST Distributor. I have harness ready to go back in. Need to ask, those that used the FAST harness as well, did you cut the 2" hole above original harness or did find a spot on the drivers side?