[Tigers] Timing

[steve wick]

Well I did say I was probably wrong.


Steve


________________________________
From: Gary Winblad <garywinblad at comcast.net>
Sent: Sunday, November 5, 2017 11:13 AM
To: steve wick; Tom Witt; tigers at autox.team.net
Subject: Re: [Tigers] Timing

Nooo.. cars had vacuum advance way before anyone gave a rat's a$$ about
emissions...
Emissions brought on the vacuum retard... two hoses to opposite sides of
the diaphram.
Gary


On 11/4/2017 10:28 PM, steve wick via Tigers wrote:
>
>
> I'm probably wrong, but I think vacuum advance was for emissions, not
> gas mileage.
>
> Steve
>
> ------------------------------------------------------------------------
> *From:* Tigers <tigers-bounces at autox.team.net> on behalf of Tom Witt
> via Tigers <tigers at autox.team.net>
> *Sent:* Saturday, November 4, 2017 5:51 PM
> *To:* tigers at autox.team.net
> *Subject:* Re: [Tigers] Timing
> Thanks for the pictures Ron. The second type seems to use not only the
> springs, but the cam action on the weights edge as a means of plotting
> the
> advance curve.  The math for the RPM, spring tension, weight... - AND cam
> action baffles my brain.  Somewhere I have a Mallory dual point (no
> vacuum
> advance) distributor. Got it in a pile of "free" stuff at a Mopar
> swapmeet
> (No step child parts for him!).  I'll have to check it's advance
> system out
> some time.
>
> Oddly I had a Volvo 544 that got 36 MPG on the highway and it only had a
> mechanical advance (no vacuum). Seems to defy the necessity of vacuum
> advance with mileage like that.
>
> -----Original Message-----
> From: Ron Fraser via Tigers
> Sent: Saturday, November 04, 2017 12:16 PM
> To: 'Gary Winblad' ; 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
>
>
> ---
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