Turbo City provides a complete system that includes a throttle body, a distributor, sensors, a harness, and everything else you need to complete your fuel injection upgrade.Turbo City provides a complete system that includes a throttle body, a distributor, sensor The upgrade to EFI begins by cranking the engine to top dead center (TDC) on the number one cylinder, and then disconnecting the battery so that the motor can't be accidentally cranked over later. Next, the battery and the distributor are removed. When removing the distributor, note the position of the rotor. This is required so that you can index the new distributor correctly. If you don't get it in right, the motor will run poorly or not at all.The upgrade to EFI begins by cranking the engine to top dead center (TDC) on the number on Once the distributor is out, you will need to remove the air cleaner, carburetor, and any spacers or adapters under the carb. All you want to see is the manifold opening, because the new components will replace everything from there up.Once the distributor is out, you will need to remove the air cleaner, carburetor, and any The stock ignition coil and igniter module can be removed and tossed in the recycle bin. It's best to upgrade to a high-output aftermarket coil. However, if you are on a budget, you can reuse the stock ignition coil until your next paycheck. We kept the Toyota coil to get a truer idea of the performance gained from the EFI upgrade only, but trashed it after crunching the numbers.The stock ignition coil and igniter module can be removed and tossed in the recycle bin. I This shows a comparison of the stock distributor (right) and the Up And Over Innovations modified GM electronic distributor. If you look closely, you'll notice that the new distributor has no vacuum advance. The computer (ECU) now handles all the ignition advance and retard functions. This distributor is slightly taller than the stock unit and might interfere with some dual battery trays. If it does, modify the tray. It's worth the effort to get EFI.This shows a comparison of the stock distributor (right) and the Up And Over Innovations m Turbo City uses a GM ECU for reliability, durability, and programmability. Turbo City has off-the-shelf, basic PROM chips calibrated to run well in most applications. Each EFI package has a PROM tuned for the vehicle requirements based on application, gearing, and other specifics provided by the customer. Fine-tuning can be done with a call or two, or you can take your truck to Turbo City in Orange, California. The ECU should be mounted in a dry location. We chose to mount it in the glovebox.Turbo City uses a GM ECU for reliability, durability, and programmability. Turbo City has The throttle-body adapter plate is bolted to the intake manifold and then the throttle body is bolted on top of this. Install the gaskets between the adapter and the manifold and between the throttle body and adapter. If you don't, you'll get a ghastly vacuum leak.The throttle-body adapter plate is bolted to the intake manifold and then the throttle bod The ECU harness has a large plug on one end to connect the motor and sensors with the computer. Since we had previously removed the heater and blower-motor assembly, we ran the wiring harness through the block-off plate that covered the stock hole in the firewall. Turbo City installed a large grommet to prevent chafing of the wires. If you still have the stock heater, you'll need to cut a hole in the firewall to pass the ECU plug and harness through.The ECU harness has a large plug on one end to connect the motor and sensors with the comp The throttle-cable guide is bolted onto the base of the throttle body using one of the mounting bolts. The new throttle cable is mounted to the bracket and connected to the throttle. The other end of the throttle cable is routed away from hot or moving parts and connected to the end of the pedal rod as it comes out of the firewall. All of the original throttle-linkage transfer rods are removed, since the cable makes them obsolete. The throttle pedal-rod end may need to be modified on some applications by removing the linkage pivot ball.The throttle-cable guide is bolted onto the base of the throttle body using one of the mou The coolant temperature sensor (CTS) must be installed in the side of the thermostat housing in place of the stock vacuum sensor. This is a good time to drain and replace the coolant in the motor. After all, who can remember the last time they had a fresh 50/50 mix in the radiator?The coolant temperature sensor (CTS) must be installed in the side of the thermostat housi The manifold absolute pressure (MAP) sensor is one of the critical components of the computer feedback system. In our application it was mounted to the valve cover using the supplied kit hardware for ease of installation, and a hose connects it to the throttle body. Other sensors are mounted to the motor or firewall as required.The manifold absolute pressure (MAP) sensor is one of the critical components of the compu The O2 sensor is installed in the exhaust pipe just after the collector. This component tells the computer how much unburnt fuel is in the exhaust so that it can adjust the air/fuel ratio to the ideal 14.7:1. This ratio provides the best power and economy in most situations. You can have the O2 sensor bung welded in by a muffler shop before you begin the conversion if you don't have welding equipment. This is the only welding required.The O2 sensor is installed in the exhaust pipe just after the collector. This component te The stock mechanical fuel pump is removed and replaced with a block-off plate, with the knock sensor mounted to it. The new EFI fuel pump should be mounted as close to the tank output as possible. The fuel pump is mounted using the supplied vibration-dampening clamps. The fuel filter shown here is mounted between the fuel tank and the fuel pump. Any fuel filter mounted downstream from the fuel pump must be a high-pressure type and use the appropriate high-pressure EFI hose and clamps.The stock mechanical fuel pump is removed and replaced with a block-off plate, with the kn The new electronic distributor must be dropped into the block so that the rotor is aligned the same orientation as the original. We had Turbo City install premium sparkplug wires from DUI. These wires are pre-cut to length and numbered for ease of use. Notice the clearance between the distributor and the dual batteries--there is plenty of room using this system, but it might not be in all dual battery systems.The new electronic distributor must be dropped into the block so that the rotor is aligned The completed package mounted with the throttle body in place and the new K&N air cleaner mounted on top looks trick. While the filter looks small, the K&N passes enough air for a ski boat at wide-open throttle.The completed package mounted with the throttle body in place and the new K&N air cleaner Electronic Hand ThrottleThe only concern we had with the EFI upgrade was the high idle speed for off-road use. With our carbureted 2F we were able to lower the idle speed all the way down to about 400 rpm, which was great for crawling on the trail. With the EFI, the idle speed was up around 650 rpm; a touch high for our taste. Turbo City can set up the system to idle at any rpm, but any lower than 650 rpm would result in a loss of streetability. To handle our trail needs, we installed an electronic hand throttle (EHT) from Off Road Engineering. This unit plugs into the EFI harness between the computer and the idle air control (IAC). The unit has two switches on the face, one for on/off and one to raise or lower the idle speed (a red light indicates that the system is active). Max rpm varies by engine type. With the shifter-mounted auxiliary idle control lever you can control the idle without taking your hand off the shifter. We can control our engine idle speed from virtually zero to 3,000 rpm with our fingertips. It's even smoother than our old cable-style hand throttle, and unlike the cable unit, we can lower our rpm if needed. Also available is an optional underhood wired remote that can be used to increase the idle when using engine-driven air compressors or mobile welders, without the need to reach inside the cab. SOURCES Davis Unified Ignition performancedistributors.com Turbo City Off Road Engineering Up And Over Innovations « | 1 | 2 | View Full Article Enjoyed this Post? Subscribe to our RSS Feed, or use your favorite social media to recommend us to friends and colleagues!