I have a TPI manifold that has been sitting in a box since I got it probably 6 years ago and I'm trying to identify it so I can install it on a truck engine for my '75 step side Chevy 4x4, I'm trying to figure out what harness and computer I need to get as well.

Here is what I know:

Late style intake manifold 87+

Fuel injectors are gray

Has an AIR MASS METER

I will be installing this on a 1995 L05 long block I pulled from a wrecked Suburban.

It is apart on the work bench, so any needed information is easy to get!

 

Unless the injectors were swapped, the gray injectors tell me it's an 89 TPI intake.

You can use the following computers...
- 85 TPI
- 86-89 TPI (1227165 ECM)
- 90-92 TPI (1227730 ECM)
- 90-91 TPI (1227727 ECM)
- 96-99 Vortec ECM (requires 4x crank reluctor and Vortec distributor)
- LS1 PCM distributor application (GM# 12200411 with 4x crank reluctor and Vortec distributor)
- LS1 PCM distributor-less, coil per cylinder (with 24x crank reluctor)
- LS3 ECM distributor-less, coil per cylinder (with 58x crank reluctor)

The TPI manfiold has little to do with the ECM used to control the system.

 

Thanks, does that include 305 computers? I can't tell if they are different.

 

I "THINK" The computer for a 305/350 are the same. The only difference is in the Prom ( aka chip).

 

I put a 305 TPI out of an 85 Z28 in my 85 K5 Blazer, I use a painless harness for a 91-92 so I wouldnt have the MAF hanging off the front of the engine. It kinda cleans up the engine bay. And also was able to use the intake boot and 3 inch exhaust to make Cold air snorkle.

 

TPI computers are almost the same. But they are interchangable. Difference is the PROM. 350 PROM matches 22 LBS injectors while the 305 PROM matches the 19 LBS. I believe the TBI computers are different due to the fact that there different parts as in fuel and air intake delivery. If your very serious about changing to a TPI system, then follow this link....
http://sethirdgen.org/tpi1.htm

 

What?????

Look for some kind of part numner.A pic would help.Do you believe it to be a stock unit or aftermarket?