TBI FAQ

Q: Do I need a VSS (Vehicle Speed Sensor) to use TBI?

A: The short answer is no. But, there is a slight improvement in drivability when using a VSS. I've been using TBI on my '73 Blazer for about 12 years without VSS and am very happy with it. On the other hand, if you're going to run a 700R4, a VSS is required for full functionality unless you have another way of controlling torque converter lockup.

Q: What kind of fuel pump do I need?

A: You will need to run an electric in-tank or inline fuel pump that puts out at least 14 psi. Higher pressure pumps can be used without any problems as long as you have a free flowing return line.

Q: How hard is it to install TBI?

A: TBI is probably the easiest fuel injection system to install. You do need to run a fuel return line and install a bung for the oxygen sensor, but the rest is very easy and straight forward.

Q: Can TBI be put on other types of engines?

A: Yes! There are a couple of ways to get this done. The easiest/cheapest is to use a "fuel only" setup which doesn't control the timing. If you want the computer to control the timing, this can be done with a modified HEI style distributor. Contact us for details.