The Ford Barn

40cpe · 06-29-2015, 12:01 PM

I've torn down two 8BA style engines and they have different thrust gears.

If I'm looking at the timing dot on the crank gear, which way does the gear tooth angle as it runs towards the back, left or right, for a forward thrust gear?

JSeery · 06-29-2015, 12:27 PM

Here is both gears.

V8COOPMAN · 06-29-2015, 12:48 PM

JSeery has the evidence above. Most likely, the one you found to be early style was running an early cam. DD

40cpe · 06-29-2015, 01:44 PM

Thanks, looks like the 8BA tooth angles off the the right.

They both had EA cams in them with side mounted distributors.

Ol' Ron · 06-29-2015, 03:52 PM

It really doesn't make any differance which set you use.

Bluebell · 06-30-2015, 01:57 AM

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I think I read that the early motors thrusted toward the block and when Henry F. built the engine with the dizzy up the top, he changed it so that the cam was thrusting against the timing cover. This required that the gears were cut the opposite way. I can't remember the logic but when I read it it made sense.

06-29-2015, 12:01 PM	#1
40cpe Senior Member Join Date: May 2010 Location: Star, MS Posts: 4,024	identify crank gear I've torn down two 8BA style engines and they have different thrust gears. If I'm looking at the timing dot on the crank gear, which way does the gear tooth angle as it runs towards the back, left or right, for a forward thrust gear?

06-29-2015, 12:48 PM	#3
V8COOPMAN Senior Member Join Date: May 2010 Location: East Shore of LAKE HOUSTON Posts: 11,115	Re: identify crank gear JSeery has the evidence above. Most likely, the one you found to be early style was running an early cam. DD __________________ *Click Links Below* __ ▼ *'35-'36 W/8BA & MECHANICAL FAN* *T5 W/TORQUE TUBE*

06-29-2015, 01:44 PM	#4
40cpe Senior Member Join Date: May 2010 Location: Star, MS Posts: 4,024	Re: identify crank gear Thanks, looks like the 8BA tooth angles off the the right. They both had EA cams in them with side mounted distributors.

06-29-2015, 03:52 PM	#5
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,862	Re: identify crank gear It really doesn't make any differance which set you use.

06-30-2015, 01:57 AM	#6
Bluebell Senior Member Join Date: Nov 2012 Location: Tauranga, New Zealand Posts: 726	Re: identify crank gear Sponsored Links (Register now to hide all advertisements) I think I read that the early motors thrusted toward the block and when Henry F. built the engine with the dizzy up the top, he changed it so that the cam was thrusting against the timing cover. This required that the gears were cut the opposite way. I can't remember the logic but when I read it it made sense.