Re: [Amc-list] 195.6ohv ignition timing and mileage (and therefore, power)

[Tom Jennings <tomj@xxxxxxx>]

Yesterday, to find the limit, I bumped ignition to 25 (!) static. OK, 
that's over the limit. But I got it to ping! Exactly where you'd want it 
to; shift into 3rd at a low speed on a medium hill. Just the little 
chuckle of detonation which just turned into a normal lug.

Cute little ping sound too. Not loud. Has anyone ever heard their 195.6 
ping?!


Before you think I'm totally off with the high static timing (it's a 
test, a test!) it means I have 30 degrees TOTAL advance at high-load 
around 2000 rpm. That's not a lot.

It's only a crazy amount at low speed/load load, where it's a lot less 
sensitive. With 25 static, idle is missy with high vacuum, but the 
slightest load drops it to 25 - 30 below 2000.

I'll drop it to 18 - 20 BTDC static today.

But it was a great test -- now I know where to hack the distrib. I think 
I have an old one to disassemble, if it's no good I'll buy one and hack 
it. I'll document it, it shoudln't be hard to measure and grind out the 
slot for 18 mechanical degrees of advance.
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