Dick and all
Have a couple thoughts on the stumble bumble routine -maybre totally usless
but thought I'd throw them out.
1. Do TR6's have a sliastic (sp?) joint in the crank pully assy? If so the
rubber may have cracked and allowed the pully to slip and the actual timing
isn't the indicated timing.
2. Wouldn't a hole in a carb. diaphragm or no oil in a dashpot cause a similar
problem? Although I don't totally understand how varying the timing would
compensate for the problem.
Bill
'70 6
>===== Original Message From tr6taylor@webtv.net (Sally or Dick Taylor) =====
>Cris---There is potential to damage the pistons when running so much
>ignition advance, under some conditions. You have skirted the main one,
>detonation, by using 94 octane fuel. This is overkill, when using a head
>with a 7.5:1 compression. Most late engines run without pinging, (early
>warning detonation) on 87 octane
> fuel, and 'normal' ignition advance.
>
>There is a way to have BOTH a lot of advance at idle, AND keep it from
>going another 20 deg., as designed, as engine speeds increase the
>advance. That is to put a short (1/4" long) piece of nylon-type tubing
>over the post that limits the total advance. The thickness of the
>tubing will determine at what degree advance stops. If this is unclear
>to anyone who has a desire to limit total advance, while wanting more at
>idle speeds, take off the 'points' plate and see how the weight
>mechanism is designed. You'll see what I am referring to. To test the
>theory at one time I was running with 20 deg. at idle, and 30 deg. with
>the timing all in. Ran fine, but in my circumstances wasn't necessary,
>as my engine happens to idle well anywhere reasonable.
>
>Jonathan, if you're tuned in, I'd like to try this on your '74 to see if
>it improves idle. (You know how that bugged me!)
>
>Dick Taylor
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