C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

1984 tpi

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Old Mar 30, 2013 | 08:58 AM
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Default 1984 tpi

Hey everyone it's me, Phil again. The weather is starting to warm up in Northern Illinois so i'm trying to get some work done on the vette.
I've changed my mind 100 times on what i'm going to do, but after no luck finding a trade partner for my tpi engine i've decided to just throw it in the car and slowly get everything i need to make it work.
The parts i know i am going to need so far are a fuel pump, fuel filter, burn off module and throttle cable, a couple power steering hoses, somewhere to mount the power steering resovoir.
So far i have had a problem with disconnecting the wiring connection on the driver side of the car right behind the battery that connects to the firewall, anyone know how that disconnects? And can anyone give me a list of other parts i will have to change to make this work? The tpi engine is from an 85 and came with all wiring, the trans and ecm.
Thanks again, cant wait to get this thing on the road.
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Old Mar 30, 2013 | 09:07 AM
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The wiring harness and "thinking" of how to do it is gonna waste all your time.
Your better option and the "easy" thing to do, is getting the EBL/Flash Ecm from dynamicefi for about $500 with HAM and multiport upgrade. Plug and play into the existing harness. This eliminates the need for harness change and allows you to run a speed denisity set up.
Drop your engine in and you can use any intake set up you want. miniram,super ram, HSR,etc.

I did this about 2 years ago and run a HSR on my 84
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Old Mar 30, 2013 | 09:10 AM
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Here maybe this will help you

http://forums.corvetteforum.com/c4-t...fi-to-hsr.html
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Old Mar 30, 2013 | 09:24 AM
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Default thanks for the reply

But, i am stuck with making this work with what i have, i cant afford to spend a ton of money on this project so anyone with expierience putting a tpi engine in an 84 please give me a list of parts and any pointers to help me make it work
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Old Mar 30, 2013 | 09:36 AM
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No problem, but you are making more work for yourself and will spend more money in the end vs the ecm
Only a few guys have done this and that was years ago, you'll have to dig thru the archives and see what you can find. If your TPI is speed density it will be a bit easier since you don't have to find locations for the MAF stuff. Keep in mind to.... that the hood is different since there is duct work in it, and fitment of the MAF, air cleaner is gonna be tough.
Good luck with your project
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Old Mar 30, 2013 | 05:41 PM
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Default thanks

Trust me, i would like to make this as easy as possible, but if im going to do all this work just to have it not even fit, maybe i'm better off buying a used crossfire engine and just trying to sell the tpi engine.
Any idea where i can get someinfo on other people who have done this swap, though, i've looked all over and cant find anything
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Old Mar 30, 2013 | 05:51 PM
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Originally Posted by philnutz
Trust me, i would like to make this as easy as possible, but if im going to do all this work just to have it not even fit, maybe i'm better off buying a used crossfire engine and just trying to sell the tpi engine.
Any idea where i can get someinfo on other people who have done this swap, though, i've looked all over and cant find anything
Not many people have done it, so its difficult to find exactly what your looking for. I did the same thing your doing back in the beginning. If memory serves me correct, at the time I only found one person in southern NY that had done it. That was 8 years ago.
Honestly, for the amount of work for that TPI set up, you will have very little gain at the end.
You can use that engine and just replace the intake with the crossfire if you like.
I also have had listed my old CFI engine in the F/S section. The block has 69k miles on it, but is equiped with a 268H cam, and the heads were rebuilt. I'm not trying to talk you into it. But may be something to consider depending on what you decide to do.
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Old Mar 30, 2013 | 06:06 PM
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I would just go with the crossfire. Way easier and money saved in the end. Put a CFI system on the motor you have.
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Old Mar 30, 2013 | 06:39 PM
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Philnutz, tell use about your car, does it have a motor in it? Is the motor in it bad? If so, put the cfi on the other motor.
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Old Mar 30, 2013 | 07:05 PM
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Default what i know

the car was purchased a few years back by my father in law. When he bought it, it had the crossfire in it, but was converted to a carb set up. The car itself has over 200k miles on it and the motor had major blow by. So currently as it sits it has no motor or trans in it. My father in law bought an 85 tpi engine and trans with all wiring and ecm to put in the car. I'm thinking he realized what a headache it was going to be and just wanted to cut his losses so he gave me the car to work on with my son as a project. So that is where i'm at. I just dont like the idea of throwing a ton of time and money at a car that between the purchase price and the engine and trans all ready has 3 k in it.
I need to spend a weekend at my father in laws farm going thru the scrap pile he has from when he pulled everything out of the car and see if i might be able to piece together the old crossfire and rebuild it, then sell the 85 engine
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Old Mar 30, 2013 | 07:13 PM
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Well in the 85 engine is good, strip off all the tpi stuff & if you can find the cfi stuff, install that on to the 85 motor. Is the wiring harness in the car still usable?
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Old Mar 30, 2013 | 07:33 PM
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Default nope

most of the 84 stuff that was in the car was stripped and discarded by my father in law, except the metal, which he threw in a scrap pile
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Old Mar 30, 2013 | 07:54 PM
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Well, you have some tough decisions to make. Most of them aren't gonna be cheap.
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Old Mar 30, 2013 | 08:09 PM
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Originally Posted by ex-x-fire
Well in the 85 engine is good, strip off all the tpi stuff & if you can find the cfi stuff, install that on to the 85 motor.
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Old Mar 30, 2013 | 08:27 PM
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Default whats the 85 engine and trans worth

what could i get for the 85 engine, trans and ecm if i sold it? it has 68 thousand miles on it?
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Old Mar 31, 2013 | 09:45 AM
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Default anyone have any ideas

what schould i ask for the tpiengine trans and ecm
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Old Mar 31, 2013 | 10:02 AM
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$500 compleye id think. keep the puylley brackets etc that nickel and dime stuff adds up. in the predicament youre in unless you have to go EFI leave the carb on it and enjoy
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Old Mar 31, 2013 | 10:07 AM
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Default seems low

i see them selling for 1500 on ebay engine alone
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Old Mar 31, 2013 | 10:10 AM
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Go for it then. Thats an insane price but if you can get it more power to you.
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Old Mar 31, 2013 | 10:36 AM
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Default 500 seems insane to me

thats 250 for the engine, 200 for the trans and 50 for the ecm all with 69k miles on it. U cant even get common 4 cyl drivetrain parts from a junkyard for that
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