Billy G,
Why so upset? Your term 'Gospel' suggests your were aware of an independent authoritative work that defines the information ... like the Machinery Handbook or an ISO or SAE document or ???.
What you site is a vendor page. Very likely a very reputable vendor but still only a vendor.
I am not trying to be an a..hole by asking. I really did want to know if there was an industry standard defined rather than what appears to be a convention used by some and obviously ignored by others.
Arvid
I always get upset whenever the Industry Standard is questioned. Those numbers have been around since the changeover from cast gears to cut gears was done. Find a Fellows Gear Shaper Co. Book called The Involute Gear. All you need to know is in there.
The numbers I cited are for a 14.5 pitch angle. Pratt & Whitney developed the system in the 1920's A pitch angle and a module number are two completely different animals. That is why they are not interchangeable.
"Billy G"
Not much left now. Sprockets? Crankcase cover?
Brian,
Curious as to how the timing is set up, just a general overview is fine? I'm good with filling in the blanks .
Greg
Hi Greg
The gears are fixed to the shafts the position is not important. the top sprocket is free on it's shaft. and will be locked by two radial screws and pinch screw in the end of the shaft.
Each cylinder is done in turn
The cam is be locked in the overlap position ( TDC exhaust stroke ) then the piston is positioned at TDC exhaust using a dial gauge through the spark plug hole, In this position the cam sprocket is then locked to the shaft. the ignition is timed by a separate flange on the rear of the cam sprocket.
Brian.
Nice that clears it up, having cams belt driven, is a benefit.. Indicating the valve position thru the plug hole ...... not easy.
Nice work Brian, always enjoy seeing the progress
Greg
I'm a new member, still reading through past posts and came upon this thread. Brian, you possess combinations of skills and ingenuity that 99.99% of us would give a lot to emulate.
You da MAN and thank you for sharing your work !
randyc
