[Tigers] Timing

[Ron Fraser]

	The Tiger C4OF-A distributor, the early style Ford distributor, lists a max of 11 for the mechanical advance or 22 crank degrees - vacuum has a max of 25 crank degrees.

6 degrees base timing + 22 = 28 degrees total advance - vacuum can pull the advance to a max of 53 degrees

You can measure the length of the slot and make calculations for the number of degrees advance you can expect.

Ron Fraser


-----Original Message-----
From: Larry Mayfield [mailto:drmayf at mayfco.com] 
Sent: Saturday, November 04, 2017 7:49 PM
To: 'Ron Fraser' <rfraser at bluefrog.com>; 'Gary Winblad' <garywinblad at comcast.net>
Subject: RE: [Tigers] Timing

Mine looks like the first photo, not eh later one. But, it has a 10 on the arm.  I didn't look at the springs for diameter. Next time Ihave it apart I will check. A 10 would give 20 degrees of crank advance and with 6 initial base timing then a total of 26 degrees.
Vacuum?

mayf

-----Original Message-----
From: Tigers [mailto:tigers-bounces at autox.team.net] On Behalf Of Ron Fraser via Tigers
Sent: Saturday, November 4, 2017 12:16 PM
To: 'Gary Winblad' <garywinblad at comcast.net>; tigers at autox.team.net
Subject: Re: [Tigers] Timing

Picture 1 is the early style Ford distributor with oil port, ID# C2OF-J - note there is 1 slot size for each weight - this is the area that I have seen wear problems 

Picture 2 is the later style Ford distributor, ID# C8AF-E - note the 13L & 18L slots - the 13L slot is being used in this example

Just wanted to show the differences in these 2 mechanical advance systems

Ron Fraser

-----Original Message-----
From: Tigers [mailto:tigers-bounces at autox.team.net] On Behalf Of Gary Winblad via Tigers
Sent: Friday, November 03, 2017 10:58 AM
To: Smit, Theo <Theo.Smit at garmin.com>; Tom Witt <atwittsend at verizon.net>; tigers at Autox.Team.Net
Subject: Re: [Tigers] Timing

The Tiger distributor I bought from Sunbeam Specialties(was years ago) was the kind with the two position advance limit.  I just had to turn it to the more limited stop, put in lighter speed shop springs and then limit the vacuum advance. All on my stock 260, works great, still on regular gas.
Gary