cgantner5150

Getting everything together to drop the 383 in this weekend. Received my new Throttle Body (52mm Professional Products) and it is apparently for an LT1. The TPI lower housing fits on fine and it comes with both linkages but.... The TPS is of the LT1 configuration.

My question is: can I just upgrade to LT1 TPS and wiring pigtail? I think it should be pretty straight forward but just wanted to know if anyone has done this or has any reason why it shouldn't work.

A little teaser pic:

1989TransAm

Yes, I have done it. I made up my own but I have seen the adaptors for sale.

AGENT 86

Isn't the LT1 TPS a non adjustable type ? Your going to need adjustment, so if my memory is working, you'll have to mod the LT1 TPS.

1989TransAm

"Isn't the LT1 TPS a non adjustable type"

Yes, but so were the 90-92 TPI's.

Kubs

Yup. My '90 is non adjustable.

AGENT 86

Correct, but the OP has an 86 with a 165 ECM and no programming to calibrate TPS idle voltage.
How does he set his TPS idle voltage without the ability to adjust ?
I would have to think that slotting the LT1 TPS, is going to be required.

twin540

I made my 91 adjustable. Set it to .54@ by slotting the tps after adjusting you're throttle body