[Healeys] Healey 100-4 timing

Michael Oritt michael.oritt at gmail.com
Fri Nov 2 18:21:04 MDT 2018


Exactly right--it is total advance that matters and I arrived at that
number by gradually increasing advance and seeing the effect upon water
temperature at speed and under full load.  Anything more and the car would
begin to overheat.  A bit too much less advance and performance fell off.

BTW I am running a DW "fast street" cam and tubular header and a Mallory
non-vacuum advance distributor fired with their Unilite module.  I too have
a Smitty's five-speed and the Toyota box, 180 XAS's and 3.54 diff set give
me about 72-73 mph at 3K rpm's indicated

Best--Michael Oritt

On Fri, Nov 2, 2018 at 6:03 PM Wayne Schultz <waschu2 at gmail.com> wrote:

> Thanks to Michael and others I am going to stick with 34 - 35 degrees
> total advance for now. What, I think this means, is that the advance at
> idle is secondary and not as important as total advance. Cruising with the
> the Toyota five speed or the original overdrive on the highway is right in
> the 3K RPM range so I think this the perfect RPM to limit total advance. I
> might make a run to my local airport and buy some 100LL fuel. I have worked
> in aviation since 1967 so I have a few friends😃
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