Now is a good time to
either run the carburetors dry or pull the drain plugs and
drain the float bowls. Failure to drain the bowls will cause
extreme flooding at start up as fuel will be supplied by
both the injectors and the unrestricted jets. Once
running as a fuel injected engine, the carb's fuel passages
are no longer used and float bowls do not contain any fuel.
|Once the o-rings are in place and lubricated, insert the injector with a twisting motion. It should stop with the top edge just proud of the aluminum pocket. Slip the half moon shaped retainer in place (it doesn't matter which way it faces) and tighten the two button head screws with a 1/8"
Allen wrench. Before final tightening, align the injector in whatever direction you desire.
The insert is held in place in the Zenith Stromberg carbs by four stainless steel
Philips head screws. No gasket between the insert and the carb body is required. BE SURE THE INJECTOR NOZZLE POINTS TOWARD THE ENGINE! The hose barb accepts a 5/16" hose and you should try to use fuel injection type hose
clamps. Typical fuel pressure is 12psi but some have experimented with these injectors near thirty psi. Needless to say keep an eye on the new installation for possible fuel leaks.
NOTE: Atop the insert is a 1/8" brass pipe plug that is used to cap off a drill passage used during
machining of the insert. The internal passages within the insert are large and it is doubtful they would ever become blocked but if need be, the brass plug can be removed with a 3/16" allen wrench.
Although not required for operation, a modified dome can be installed to hide the TBI installation. On the bottom, the tube that is used to guide the piston needs to be
completely cut away making the dome unsuitable for future use as a carb part. Around the bottom edge of the dome is a lip that should also be removed. It can be cut away with a
Dremel tool, hand file, or by sanding it away on a flat surface. Additionally the top may need to be trimmed another half inch or so and the old plunger tube cap glued in place if under hood clearance is tight. Be sure to check the clearance before slamming the hood! Email me if you have questions about the domes.