I have a 91 TBI that I am converting to TPI. I have the intake. I need to swap fuel pumps and comps for sure. BUT do I need a different wiring harness? I think I do, but not completely sure.

Any know a good place to get a good (CHEAP=under $100) harness?...

And another thing I beleive that the TBI distrib will work with the TPI system? Is this correct?...

 

lol. try at ur own risk man. im in the middle of a swap and its a pain in the butt. ur using speed density and a harness is hard to come by. ebay. or maybe its just me. and i think ur right about the distbtor. yeah need the harness... some site modifies it for u for like 200 bucks or something. maybe u get lucky who knows

 

MAF harnesses are a bit easier to find.

I've been looking for a reasonable SD harness for almost a year, they dont come cheap/easy.

There are a few aftermarket harness makers but non that I know of SPECIFICALLY for an F-BODY, which means you'll end up with your ECM somewhere other than its stock location, or at very least a big square hole in your fender wall.

 

From what I've read on here the SD set-up is the way to go. Am I correct in thinking this?

Thanks, Darrell

 

SD offers a few advantages.

Maf has its own advantages, the ecm is better at calculating Air/Fuel with a stock computer and mods, but once you get into prom tuning My personal opinion is SD advantages out weigh MAF.


On a side note, almost all current vehicles use BOTH sensors.

 

I know it would be a MAJOR PITA but coundn't someone just MAKE one?. I mean you get your pin outs for the ECM and run the wires? right?. I know it would be a major PITA but it would also be pretty cheap?... I have 2-4 weeks to get one so would I just be better off doing that?...

I now I may be pioneering here, but hell I am also the one MAKING headers for the 60* V6's too so.. nothing new there...

 

yes it would be a major pain

Not only that but by the time you go to GM and buy all the connectors for your harness you've spent more than what a painless wiring harness would have cost with labeled wires.

There are a few people that hand make them and sell them, they probably get a price cut on the connectors buying in bulk thus resulting in a cheaper harness than you could make yourself.

The last solution is to get a MAF harness, and repin it to a SD harness.

 

Ok I have a MAF harness on the way...

What do I have to "repin" to run S/D?...

 

http://www.eecis.udel.edu/~davis/z28/ecm_swap_730/

 

Kick *** thanks.