I'm retrofitting a TPI into a 50's classic and will not need the EGR. I'm assuming I can remove the EGR valve (make a blocking plate) and then the ECM will have to be changed to ignore the EGR? Also, if I want to go to the trouble, I assume I can cut and remove the EGR tubes running parallel to the runners and weld them up?

I'm also curious about the water circulation system (don't know what this is called) that sits below the TB. Can this be removed as well?

Any recommenation for a good book about TPI that might address these kind of situations? I just received the TPIS Insider Hints book but haven't had a chance to read it yet.

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ignore the cooling passage on the throttle body and run a hose from the manifold to the heater core check valve. the passage on the TB is used to warm it during cold starts. will hinder HP when engine is at operating temp.

 

Then it won't hurt if I want to make an aluminum plate and remove the entire cooling water system?

 

I did a similar swap on my 85 Jimmy. I do not have the EGR hooked up at all. I am running a stock 1987 PROM and I have no error codes.

I am not 100% sure why my setup works, but I know I did not supply power to the EGR circuit when I hooked up allthe power leads at the fuel block. This sounds strange, but if you see the diagram, then you can see there was one identified for EGR.

Anyways, what I am leading to, is that you may not need a custom prom, although a custom one will net you better performance and proper calibration for your setup.

I have been *very* pleased with my TPI setup. More torque than I expected, milages is steallar above the carb I had, and it is a turn key and drive setup.

JTR makes a book on TPI swaps. It is fairly informative on what you need. It is not a how to book, rather what to be aware of book. It talks about things like vehicle speed sensors, fuel pumps, air boxes, etc. It is worth it if you have not work with a TPI before.

the best book I had as a GM service manual for the year of TPI. It gave me the wiring harness breakdown. That made a world of difference.

If you have any swap type questions, let me know. It sounds you are doing something similar to what I did.

Mark.

 

You need the lower coolant passage since it contains the idle air control motor. You can however, disconnect the coolant lines.

Really, once you get all the stuff in the engine bay, you can't even see it.

I got some new pictures of my setup ... all polished. If you like I can send you some.

Mark.

 

for good books just go to Barnes & Noble and look in the auto section. i got the camaro performace handbook, camaro & firebird performance hand book. small block chevy performance and a couple more there. all are very informative on general tuning and performance mods. once you learn general TPI function you will relize how easy fuel injection is to adjust because you won't have to, the computer will do that for you. is very frustrating when diagnosing a code or drivability problem but most of these books will list and solve problems in detail. is easy to narrow the problem down after you know each system and it's function. and for a problem you just can't solve, you have thousands of busted knuckle freaks on this board to help you through it.

 

As for the coolant bypass, I did something real cool. I took the bottom piece off, cut the hose nipples off, fill the holes with JB weld, filed it down smooth and painted. It looks awsome. I will post pics when I get them.

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