TPI Conversion Wiring Question. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Deuce · 12-05-2004, 03:54 PM

Can anybody tell me what I need to keep out of a factory 87 IROC harness to make the engine in my 68 work??
I'm in the process of pulling the motor/trans out of the car and there are a ton"o"wires!! What can I eliminate?? I want to keep it as simple as possible.
Thanks in advance!!

jiggs · 12-05-2004, 06:56 PM

Try checking out this website. www.chevythunder.com

classicchev · 12-05-2004, 11:33 PM

Ive done the TBI the hard way, stripping out the old wiring harness, ITS A REAL PAIN IN THE A$$. I wouldn highly suggest a painless wiring kit, it will save you alot of grief. If you need any of the wiring schematics(sp?) I have the books that you will need. Email me if you are interested in the books, or hearing of my experience with the TBI swap. Darren

tpi72blazer · 12-06-2004, 08:15 AM

My TPI unit came from an 88IROC and had the factory harness on it as well. I decided to go with an aftermarket wiring harness. The amount of headaches and frustration it saved in the long run made it well worth the money. An aftermarket harness also makes the conversion look a lot better - the only wires you have are just the ones you actually need.

Russell · 12-06-2004, 11:16 AM

I rebuilt my harness, it wasn't too terribly tough, just need to be patient, and check everything three times, then solder once. There are great wiring diagrams on Chevy Thunder that can show you what all you need (most of it)

Deuce · 12-06-2004, 03:54 PM

Quote:

Originally Posted by Russell

I rebuilt my harness, it wasn't too terribly tough, just need to be patient, and check everything three times, then solder once. There are great wiring diagrams on Chevy Thunder that can show you what all you need (most of it)

What did you keep and what did you discard?? Pm me your number and I'll call you.

Deuce · 12-06-2004, 03:57 PM

Quote:

Originally Posted by classicchev

Ive done the TBI the hard way, stripping out the old wiring harness, ITS A REAL PAIN IN THE A$$. I wouldn highly suggest a painless wiring kit, it will save you alot of grief. If you need any of the wiring schematics(sp?) I have the books that you will need. Email me if you are interested in the books, or hearing of my experience with the TBI swap. Darren

Darren. I'll call you and we'll have to hook up.Going to be REALLY busy with work this week.
Do you want to sell your books/manuals??
Did I PM you my home number??

Deuce · 12-06-2004, 04:00 PM

I think 1/2 the fun is making the factory harness work. Otherwise it's kinda like buying a truck already painted(not that theres anything wrong with that, just not as much fun)

Russell · 12-06-2004, 08:29 PM

I'd agree with you doing the harness yourself

The only stuff I found I was pulling out was AIR system stuff, and the 700r4 lockup stuff (if I remember right...) I am using the EGR on my setup. Just need to find a solenoid for it now...

If you need any help with the harness, feel free to PM me here, or send an email to Russell@ZieglerDigital.ca.

I should have my unit fired up pretty quick, just gotta break my cam in, and drill my headers for the 02 sensor bung...

classicchev · 12-06-2004, 11:52 PM

If you want to buy the books that should be no problem, i really doubt I will be using them because I am buying a Ramjet tomorrow, nice easy hookups. Pm me if you would like to see the books. Darren

12-05-2004, 03:54 PM	#1
Deuce Registered User Join Date: Apr 2004 Location: Calgary, Alberta,Canada Posts: 1,595	TPI Conversion Wiring Question. Can anybody tell me what I need to keep out of a factory 87 IROC harness to make the engine in my 68 work?? I'm in the process of pulling the motor/trans out of the car and there are a ton"o"wires!! What can I eliminate?? I want to keep it as simple as possible. Thanks in advance!! __________________ I know what your thinking.......I have ESPN. Sometimes it's easier to do things the hard way. Fesler Built 1968 Chevy C10....Must resist the urge to mess with it!!

12-05-2004, 06:56 PM	#2
jiggs poker face Join Date: Jul 2002 Location: Saskatoon, Saskatchewan Posts: 218	Try checking out this website. www.chevythunder.com __________________ If you could kick the person in the *ss responsible for most of your trouble, you wouldn't sit for a month.

12-06-2004, 08:15 AM	#4
tpi72blazer Tpi72Blazer Join Date: Sep 2004 Location: Colorado Posts: 92	My TPI unit came from an 88IROC and had the factory harness on it as well. I decided to go with an aftermarket wiring harness. The amount of headaches and frustration it saved in the long run made it well worth the money. An aftermarket harness also makes the conversion look a lot better - the only wires you have are just the ones you actually need. __________________ Indian - the other money pit

12-06-2004, 11:16 AM	#5
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	I rebuilt my harness, it wasn't too terribly tough, just need to be patient, and check everything three times, then solder once. There are great wiring diagrams on Chevy Thunder that can show you what all you need (most of it) __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

12-06-2004, 04:00 PM	#8
Deuce Registered User Join Date: Apr 2004 Location: Calgary, Alberta,Canada Posts: 1,595	I think 1/2 the fun is making the factory harness work. Otherwise it's kinda like buying a truck already painted(not that theres anything wrong with that, just not as much fun) __________________ I know what your thinking.......I have ESPN. Sometimes it's easier to do things the hard way. Fesler Built 1968 Chevy C10....Must resist the urge to mess with it!!

12-05-2004, 11:33 PM	#3
classicchev Senior Member Join Date: Nov 2003 Location: Calgary Alberta Posts: 1,936	Ive done the TBI the hard way, stripping out the old wiring harness, ITS A REAL PAIN IN THE A$$. I wouldn highly suggest a painless wiring kit, it will save you alot of grief. If you need any of the wiring schematics(sp?) I have the books that you will need. Email me if you are interested in the books, or hearing of my experience with the TBI swap. Darren

12-06-2004, 08:29 PM	#9
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	I'd agree with you doing the harness yourself The only stuff I found I was pulling out was AIR system stuff, and the 700r4 lockup stuff (if I remember right...) I am using the EGR on my setup. Just need to find a solenoid for it now... If you need any help with the harness, feel free to PM me here, or send an email to Russell@ZieglerDigital.ca. I should have my unit fired up pretty quick, just gotta break my cam in, and drill my headers for the 02 sensor bung... __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

12-06-2004, 11:52 PM	#10
classicchev Senior Member Join Date: Nov 2003 Location: Calgary Alberta Posts: 1,936	If you want to buy the books that should be no problem, i really doubt I will be using them because I am buying a Ramjet tomorrow, nice easy hookups. Pm me if you would like to see the books. Darren

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