I just purchased a TPI unit from a 1990 Corvette. It has been glass bead blasted and powdercoated chrome. I also purchased the computer and the gaskets and the bolts. What harness should I be looking for??? And do I need to change anything else?? Is this a day job, a weekend job or a week long job???
I appreciate any help. I'm new to TPI.

P.S.
I'm switching my TBI in my 1992 Camaro RS. And the new TPI is speed density.

 

You will need a 91 or 92 speed density harness and if u dont have them u need 22IB injectors. I would say its a weekend job. Long weekend job proly.

 

Let me know how it goes cause I'm wanting to do the same.

 

my car was origionaly TPI, i blew up the motor so i picked up a used TBI engine from a 91 camaro. i slaped the intake on and changed it over and now it wont stop pinging. i posted a topic and found out the TBI heads have a larger combustion chamber than the TPI. the TPI is set up for more aggressive timming so my car is pinging. i am going to change the heads over soon. and find out for sure if thats why it's pinging.

 

If he has a TBI, it's a 305 and he should use the 19# injectors. I'm doing the same swap next week, but I'm using a rebuilt set of 081 heads (tpi) The TBI heads are swirl port, and don't flow well at higher rpm. I'm doing the maf setup, but have a SD ecm and plan on repinning the harness from the maf and converting in the future. BTW, I'm also doing headers, LT1 cam, porting the heads, and putting 3.42 gears in at the same time. You'll have to replace the TBI fuel pump with a TPI pump while you're at it, because the TBI is a low pressure pump and won't work. You'll have to drop the tank to do it. That's why I'm doing the gears at the same time, the rear will already be out to remove the tank.