I have a 92 rs with the 305 tbi, 5 speed. The car was garaged its whole life up untill around 87k miles when I got the car. It now how has 89k miles so still a very low mileage extremely clean 3rd gen. Well at least the cleanest I have ever seen, it has one bb size dent on the hood and other then the whole car is flawless.

Well anyway I want to swap an lt1 into it. To my understanding on the lt1 harness there are only 5 connectors that need to be modified. Im not sure where too, are you only cutting and splicing wires into the the c100 connector on the 3rd gen? Its kind of hard to understand when I dont have both the harnesses in front of me, but im just trying to get the best understanding before I start.

For the lt1 harness connectors
c100
c105
c210
c230
c220
3rd gen harness
c100
?
?

I have looked at all the wiring threads but the only ones I can match up to the c100 connector are the tach signal, coolant temp gauge signal, oil pressure signal. I have the connector views for the lt1 but i just dont see what to splice into what other then the gauges.

My main question is what wires out of these 5 connectors on the lt1 harness are the most important ones that get it to start and charge?

Like ones that are named

POWER FEED FROM IGN FUSE 11
or
POWER FEED FROM INJECTOR FUSE 10

Where do these wires get spliced into, what is there purpose and what do they feed?

Also ive been reading about the VATS. If I wire this all correctly will I have to do anything about this, or is there a set resistance in the lt1 pcm that wont be compatable with the in the VATS module with the existing 3rd gen key. When you send the lt1 pcm to get rid of it, do you still wire everything the same? How does this work?

Any help will be appreciated.

 

For best results you need to disassemble and rebuild the LT1 harness to fit your engine bay and dash

The two main 3rd gen connectors you need to keep up with are the C100 and C207
Here are their pinouts
http://i150.photobucket.com/albums/s...p/C100C207.png

ECM and INJ fuses go through the C207

VATS needs to be disabled with the new setup both by the tune and by modifying your dash harness. Behind your drivers kick panel youll find the starter kill relay. Either ground the blk/yel wire or bridge the two heavy wires(colors vary)

 

I used the original plugs from a '95 LT1 dash harness and spliced those into my dash harness using some old plugs from an old V6 harness so I didn't have to cut any plugs from my LT1 engine harness or my TPI dash harness, then used the LT1 underhood fuseblock to keep the LT1 C100 connector which made it pretty much plug and play on it.

 

I just transplanted a 95 engine, Transmission, Harness, Computer into a 96 camaro, Now I am having problems with it starting.

Any help as to which wires need to be connected would be of great help, Thanks.