You may lack the skills and knowledge to inspect your vehicle’s catalytic converter. Your fuel pump may be similarly outside your comfort zone. Likewise, your head gasket, engine block, and pistons might be among the long list of parts that you’re happy to let your mechanic handle. But there are several maintenance items you should get into the habit of checking on a regular basis.
BPU(TM)’d Supras run a little on the rich side as far as fuel ratios go. This hurts power. What it does do is provide a safety margin that makes engine damage through detonation unlikely. If you get a fuel controller, and tune it properly (on a dyno, with an accurate EGT gauge, and a high band O2 (The Stock O2 sensors are not accurate), then you should be able to gain a noticeable amount of power. One of the most popular electronic fuel controllers is the A’PEXi S-AFC. The Fields SFC is good too.
Check the exhaust system, including the catalytic converter price guide, for rust and holes, and repairs. Finding an old exhaust bandage flapping around under there can be a big hint.
Kilowatts – A measurement of power. The more kilowatts, the more power – and in car speak this usually means greater speed. 1 kW = 1.341 bhp (brake horsepower).
How many people have own it? Cars owned by one owner usually have better care because they were purchase new and kept up. It was somebody’s “baby”. Try to find a car that hasn’t changed hands too many times.
Auto manufacturers, and all those down the line like dealers, etc., make many times the profit on large cars that they do on small cars. Large cars require more horsepower to drive them down the road, more power for the charging system to run the bigger AC, more energy for power and heated seats, power mirrors and other accessories, plus more power to move a larger, heavier object down the road at the same speeds. Power for all those things comes from the engine, and the charging system that the engine runs. Simple physics: the more power it takes to run a car, the lower the MPG. If you want horses, you have to feed them.
Start the vehicle. Look for any leaks and listen to be sure the car sounds quiet and well tuned. Lower the car from the blocks and give it a test drive before you conclude your repairs. With these simple steps, you can change rusty exhaust equipment on your own, and save hundreds in repair costs.