YotaJosh
SILVER Star
Project 20RE - Junkyard injection with TBI
What: inject a Toyota 20R 4 cylinder motor with GM Throttle Body Injection (TBI) as cheaply as possible
Why: 22RE's don't grow on trees around here, and usually need a rebuild before dropping in the engine bay. Plus I like to try new things, and I have a good running motor that I don't want to throw away.
Ever since I started wheeling my Toyota, I've realized that carbs suck off road. Granted, the factory Aisin carbs are better than most, I still had issues. The Land Cruiser crowd has been adapting the GM TBI system to the F and 2F motors for years, so I knew it was possible to convert this system to run just about anything.
To begin this project, I started searching around for companies that sold kits or parts, and found a few, but the prices were out of my budget ($1000 or more sometimes). I figured I could do better. I then started researching the TBI system in general, and found that it has a strong following in many denominations of the automobile world. One such group is the IH crowd, or "binders" as they refer to themselves as. This lead me to Binder Planet, and all the wonderful tech that is contained in the "Injection Tech" section of their forum. A man by the name of Bill Hamilton has his act together! By soaking up all the info there, I was prepared to begin collecting parts for my project.
So, here's the breakdown of my system, and the source/price of each component (* items came from junkyard):
So far my total is $718.23. So far I'm less than a standard propane conversion, and less than a 22RE core and rebuild.
The big hit in the project was the AutoProm programmer at $330. Take that out of my costs (plus the ZIF socket), and it's only $378.23. I feel that since nobody had a BIN file for my ECM to run a 20R, the programmer was a good investment.
I'm still tuning the system, but so far, I feel it was money well spent. Off road performance is awesome, and the engine really likes the TBI.
What: inject a Toyota 20R 4 cylinder motor with GM Throttle Body Injection (TBI) as cheaply as possible
Why: 22RE's don't grow on trees around here, and usually need a rebuild before dropping in the engine bay. Plus I like to try new things, and I have a good running motor that I don't want to throw away.
Ever since I started wheeling my Toyota, I've realized that carbs suck off road. Granted, the factory Aisin carbs are better than most, I still had issues. The Land Cruiser crowd has been adapting the GM TBI system to the F and 2F motors for years, so I knew it was possible to convert this system to run just about anything.
To begin this project, I started searching around for companies that sold kits or parts, and found a few, but the prices were out of my budget ($1000 or more sometimes). I figured I could do better. I then started researching the TBI system in general, and found that it has a strong following in many denominations of the automobile world. One such group is the IH crowd, or "binders" as they refer to themselves as. This lead me to Binder Planet, and all the wonderful tech that is contained in the "Injection Tech" section of their forum. A man by the name of Bill Hamilton has his act together! By soaking up all the info there, I was prepared to begin collecting parts for my project.
So, here's the breakdown of my system, and the source/price of each component (* items came from junkyard):
- TBI unit from a 4.3l Chevy V6* - $25
- 7747 ECM (computer) from a 5.7l Chevy C1500* - $25
- Wiring harness from a 5.7l Chevy C1500* - $25
- Ignition coil from 5.7l Chevy C1500* - $8.99
- 22RE Distributor* - $20
- Dodge Durango air cleaner housing and duct* - $10.99
- FJ80 throttle cable* - $10.99
- MAP,ESC,Ignition Module* - Free thanks to cargo pants.
- 3/4" x 6" x 12" aluminum plate (for adapter) - $17
- O2 Sensor - Bosch 13077 - $44.99
- Non-fouler 42002 - to make O2 bung with - $4.29
- Spectre 3" cone air filter - $20
- 3" exhaust pipe coupler - to attach air filter to duct - $2.99
- Fuel pump - Airtex E8094 - $112.99
- Moates AutoProm APU1 burner/emulator/ALDL logger - $330
- Moates G2 memory adapter - $30
- Moates S2 28-pin ZIF socket - $10
- Various nuts/bolts/connectors/etc - $20
So far my total is $718.23. So far I'm less than a standard propane conversion, and less than a 22RE core and rebuild.
The big hit in the project was the AutoProm programmer at $330. Take that out of my costs (plus the ZIF socket), and it's only $378.23. I feel that since nobody had a BIN file for my ECM to run a 20R, the programmer was a good investment.
I'm still tuning the system, but so far, I feel it was money well spent. Off road performance is awesome, and the engine really likes the TBI.