Re-sending this 'cos my server has been down, so I didn't see any
replies, or it didn't get sent in the first place! Can't believe
no-one has any opinion -- not on this list !! {:-)
> I am not confident that my ignition timing is correct.
> Its a 1275 (actually bored out to about 1320) with a Piper 276 cam,
> raised CR and smoothed (not enlarged) ports. Twin HS2 SUs. K & Ns
> If set with a strobe, to the recommended 7 degrees it runs fine, but
> seems to run better if it is further advanced. Revs better, faster
> response.
> Problem is, even when set at 7 degrees of advance, when starting
from
> cold if frequently "catches" as it fires. It fires, but stops the
> motor dead, as if it is firing too far BTDC and driving the piston
> back down the compression stroke. If I retard the ignition then it
> starts better but won't rev at all well.
> Once running it seems OK I cannot hear any pre-ignition - - - but
then
> I am pretty deaf from years of open air motoring and loud volume
heavy
> metal!!
> I have seen stuff here about setting the ignition advance at higher,
> running rpm, rather than static or tick-over rpm.
> Can someone talk me through it please. What do I need to know?
>
> Guy
> - - - oh, and Happy New Year!
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