i have a 85 z that was a 305 carb.. now i have a tunport roller motor and would like to put it in there, i need a harness and ecu.. not sure that would be all it would take to do it so if u have one or can give me any advice, it would help so much..

 

I'm doing the same conversion on my bird. Found a few things you will need. Throttle valve cable, electric fans help, fuel lines with intank pump, air filters and ducts, and possibly, depending on your set-up, I converted to serpentine belt system from tbi cars as well. If you do the belt thing, make sure you get the exhaust bolts that hold support brackets and all. I might have an extra harness and ecm. Won't really know until I get mine going, but can keep you informed if you can wait. Understand if you can't.

 

thats kool i am in no hurry the thing has been sitting in my garage for 4 years.. i just came across a 400 sbc, and i am going to buld that, but in the mean time i would like to put this motor in just to drive it.. and then down the road build a holley ram 400.. is it hard to run the harness through the car, i was look at the painless setup to convert it o speed density to get ride of the maf.. do u no anything about the painless? pro cons?

 

I've heard good things about Painless Wiring. Only thing I see you having a problem with is with the injectors with the original interior wire harness. There is a second fuse for fuel injected cars on the fuse block. You can try to run a wire from there to the tpi harness. Also, don't forget about a pump that will deliver the right fuel pressure. I'm putting one in the tank and running new fuel lines all the way through. The harness I have is for a maf car. I was going to do speed density, but heard not as many good things about it. I guess that's the reason the LT1 and LS1 cars have maf. One thing you could do is get the wire diagrams and see what you may need to have and how it is set up. If you know of anyone that has a tpi in their car, ask to take a look or take pictures from all angles so you have a reference point on how it should look when you are done. It'll be a lot of work, but I'm going through the same thing. The engine harness for tpi is actually simpler than that of the carb engines. So good luck and let us know how it's doing. If any questions, pm me and I'll give you my number and hopefully between the 2 of us, we can get both cars up and running.

 

Stick with the 86-90 MAF system. 1985 is not the most desireable harness/ecm.

 

i have a wire harness for a tpi motor it is for the MAF with a 9th injector it is a harness for just the motor does not plug into the fuse box on the drivers side just the ECM on the pass side i bought it to do the TPI conversion on my car but the harness i needed plugs into both side so i got an extra one if you are interested let me know

thanks

 

i
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i am not sure if thats what i need all i know is a have a 85 iroc that was
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a carb car, and i have a tuned port motor out of a 88 iroc, so i am not sure what harness i will need, is that the one i need? and off hand do u know what else i will need to have and maybe any advice to make it easy?

 

you will need the TPI system manifold will have to be 85-86 i think changed heads in 87 you will also need an ECM and a new fuel pump in the tank for a TPI car as far as to wether the harness i have working for you not exactly sure but it is possible then its just a matter of putting it all together

 

well i have a complete 305 tpi out of a 88 or 89 iroc not sure witch it a roller motor..

 

i have complete 85 camaro underdash underhood harnesses maf ecm setup 450 its urs

 

I have a 85 MAF Setup complete and a 90 Density Setup Complete LMK everything you need and I can give you a good price

 

I have a complete TPI system from a 1985 Z28. The TPI intake including manifold, runners and plenum plus the entire wiring harness including the CPU. I also have 2 custom chips that I will throw in. One from Superchips and the other from TPI.com. I also will throw in the proper throttle cable. $400 plus shipping.

 

If you know exactly what you need in your harness, you should talk to Mike from efi connection. I think he advertises on the site now. Anyway, he did a harness conversion for me and did a great job at a VERY reasonable price. Everything was professional and he even included detailed notes about what he did to the harness. Definitely a surefire option.