Edelbrock 3550 - Manual (Page 22)

22
Pro-Flo EFI Installation Instructions
©2005 Edelbrock Corporation
Brochure No. 63-0115 Rev. 10/05
7. Remove all internal components from the distributor housing, including the vacuum advance
diaphragm.
8. Install the electronic Hall effect sensor and sensor plate, using the fasteners
provided. The sensor plate has been designed to fit into a small cap or large cap
distributor. Only the fastening holes and sensor position differ. The circuit board
comes factory set for large cap applications. For small cap distribution move the
sensor to other mounting holes. See small cap section on next page.
NOTE: It is critical that the sensor plate fits securely in place, and is level in
relation to the distributor housing.
9. Install the shutter wheel on the bottom of the rotor mounting plate. The shutter wheel cannot
be installed from above the mounting plate and must be installed from the drive gear end of the
rotor shaft. The shutter wheel is fastened to the rotor mounting plate by two screws. On small
cap distributors, it is necessary to first install the provided aluminum ring spacer above the
shutter wheel. When properly installed, the notched end of the rotor mounting plate will be
farther from the narrow shutter tooth.
NOTE: On small cap distributors, it may be necessary to file the stud holes of the shutter
wheel to fit.
10. If you are converting a mechanical advance distributor, the advance assembly weights should
be discarded. Replace them with the provided lock-out plate or weld. Secure the lock-out
plate with the stock springs. If possible, have the shaft Tig welded to the rotor plate by a
professional. If not, apply a small amount of RTV silicone to the underside of the rotor plate,
and on each of the studs prior to installing the lock-out plate.
11. Reinstall the distributor shaft into the distributor. The shutter wheel teeth should pass
through the Hall effect sensor without touching on either side of the sensor. The shutter
wheel teeth may be carefully adjusted by hand to ensure clearance if necessary.
Shutter Wheel
Lock out plate