[Fot] FW: Distributors a few more thoughts

[Van Mulders Marcel]

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Van: Van Mulders Marcel [mailto:van.mulders.marcel at telenet.be] 
Verzonden: maandag 24 februari 2014 22:18
Aan: 'fubog1'
Onderwerp: RE: [Fot] Distributors a few more thoughts


Hi Glen, thanks to you and other  FOT guys , I've been looking further than
the distributor and found a broken chain tensioner and an extremely
stretched chain, touching the chain cover at tickover. The noise disappeared
at higher revs. I've to apologise to Mallory Ignition for supposing their
distributor was the cause of the timing problem
Marcel Belgium

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Van: fubog1 [mailto:fubog1 at aol.com] 
Verzonden: maandag 24 februari 2014 22:05
Aan: van.mulders.marcel at telenet.be
Onderwerp: Re: [Fot] Distributors a few more thoughts


Marcel NICE looking car!
To summarize your recent posts, a lot of good advice has been posted, I just
want to share with you what I generally do for clients, keeping in mind that
I insist that the engine speed be kept below 6500rpm, all 87mm.
As I posted, I use the 45D dist. It has advantages including the big cap to
prevent spark-scatter, asymmetrical cam design for points applications,
rugged mechanical advance mechanism etc. It's a good unit, either optical or
magnetic trigger will be fine.
You should be pretty much full mechanical advance at high revs, so the
counterweights will be against the stops so there should be no timing
scatter resultant from the mechanical advance mechanism.
Make sure the breaker plate is not wobbling around, that will give erratic
timing
Also pay VERY close attention to the drive gear end float! I discard the
pedestal gasket and go metal-on-metal and machine the pedestal for minimal
end float, around .002ish seems to work well.
I also generally use new cams nowadays, for whatever that's worth, and I
have no timing issues (so far, probably just jinxed myself!)
Glen Efinger
www.englishautosports.com




-----Original Message-----
From: Van Mulders Marcel <van.mulders.marcel at telenet.be>
To: fot <fot at autox.team.net>
Sent: Sun, Feb 23, 2014 2:37 am
Subject: [Fot] Distributors


What distributors are you guys using for racing the Triumph TR 2-4A engine?

In the Triumph Competition & British GT championship, electronic ignition is

allowed, but the mechanical advance mechanisme has to be retained.

Programmable advance curves are not allowed. In recent years, I'm using the

Mallory Unilite Electronic (#4532001) : no failures but the ignition timing

is far from steady, especially above 5000rpm the timing is very erratic (=

most of the time when racing). I'm looking for

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