Just read an 8BA service bulletin...dated Feb 15 1949
ArdunBill wrote .........
<<......Now it is a mystery to me why Ford had the helical gears
thrust to the rear on the '32 to '48 Flathead, then in '49 (through '53)
changed the gears to the opposite helix, so now they thrust forward,
and the gear on
the cam nose that drives the dist. bears against the inside of the
timing cover on a face provided.
Anybody out there know why Ford made this change to the helical
gears and their direction of thrust in '49? Was it something to do with
the new distributor drive's needs? Cheers Bill>>
8888888888888888888888888
Bill, this is what Ford had to say about the new 8BA timing set-up.
"The new camshaft is drilled from the front end to the center of the front
bushing. Oil is pumped through this passage to lubricate the thrust
surfaces, camshaft gear & distributor drive.
The camshaft gear helix is cut with an angle that is reverse to that of
former gears. This is done to provide a one-way thrust to the camshaft
for silencing backlash".
Ok, Ford is saying that they lessened frontal engine noise this way
& provided lubrication to the dizzy drive gears & thrust surface, so your
guess is partly right.
Brian NZ
///
/// land-speed@autox.team.net mailing list
/// To unsubscribe send a plain text message to majordomo@autox.team.net
/// with nothing in it but
///
/// unsubscribe land-speed
///
/// or go to http://www.team.net/cgi-bin/majorcool
///
///
|