I have a federal Spec '76. Supposed to be 2 ATDC but with twin HS4 and
header etc. I run at the 10 BTDC except when trying to pass emissions.
Then I set it closer to 0.
You are supposed to set it as far as you can BTDC without pinging. I
know when mine drifted a bit further than 10 BTDC I got some pinging
under heavy loads.
Alan
Richard Gosling wrote:
>Ken,
>
>Can't say for certain about a 1300, but for a UK 1500 engine with twin SUs
>and no emissions control gubbbins, the standard setting is 10deg BTDC.
>
>My approach would be to get the vernier adjustment more or less in the
>middle, allowing you to adjust either way. Use the normal method of
>twisting the distributor around to get the timing approximately right, then
>tighten the dizzy down and use the vernier to get the adjustment just right.
>
>Dynamic timing should be done at low revs and with the vacuum advance
>disconnected.
>
>Personally, if I had a vernier adjustment, I would then continue to fiddle
>for the next week or so of driving, advancing by a few clicks before each
>drive, until I got the first hints of pinking under low speed/full throttle
>conditions, then back off a little, so I get the most advanced setting I can
>get away with. Whether you do this or stick close to the standard setting
>is up to you!
>
>Richard & Daffy
>
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