OK, so I finally decided to do something with my car. I found a 89 RS roller, which I'm looking to swap in my engine and trans into. It had a t5 and 305 TBI, and mine has a 700R4, and 305 TPI. What all do I need from my car? So far, we've come up with engine, trans, TPI harness and computer, and dash. Is there anything else I need from my car, and do I need to swap the dash?

thanks,
Andrew

 

Fuel pump, exhaust.

You shouldn't need to swap the dash. But, TBI has a VSS buffer that TPI doesn't have.

 

so I would either need one of those Dakota digital boxes that converts it, or to swap in the tpi dash/speedometer?

Also, how deep does the harness go? It looks like the injection harness is connected to the headlights, interior wiring, taillights, all of that stuff. How much of it do I need? And what's the best way of going about taking it out?

Thanks

 

tpi has a external buffer for the 1227165 maf ecm like tbi 2k ppm, the buffer is in the ecm on the 1227730 tpi map sd setup and is 4k ppm direct to the ecm.

 

I had never heard that. Thank you for the clarification. So, not an issue for falconman.

 

ok, so then the dash doesn't need to be switched. thanks for the clarification.

already asked this, but am stuck here.... how deep does the harness go? It looks like the injection harness is connected to the headlights, interior wiring, taillights, all of that stuff. How much of it do I need for the swap? And what's the best way of going about taking it out?

 

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This was the slow part for my swap. The chassis harness is integrated into the fuel injection harness. When I did this swap on my 92 RS I had to get out the wiring diagram and chase down all the points where the fuel injection harness ties into another harness, cut it, and mark it. Then when I put everything back together with the TPI harness I modified it so it did not tie into anything else. I have wiring diagrams for a 90-92 TPI car and I believe a TBI car too. I'll have to look at my wiring diagrams folder when I get home tho.

Whats the year of the engine/trans harness and I'll post what I have that is relevant.

 

It is a 1988 305 TPI and 700r4, going into a 89 305 TBI

 

I think most all my stuff is speed density diagrams but I'll check for you. Lord knows I wished somebody looked for me when I was doin it lol.

 

arby's- it's good mood foooooood

 

Lol, nice signature

 

thanks

 

I dug through my computer and all my stuff is 90-92 speed density. Sorry I couldn't help ya man.

 

ok, well thanks for looking

 

Opps lol