Echlin #VC-1810 advance can or equilivant
I don't know anything about BBs
Every engine is different.
With alloy heads, and just 10/1 Scr,
I find it very interesting that, in Cruise Mode, or at Part Throttle, (which is where the the system is designed to work); you could get detonation at all.
I had an Eddie-headed 10.7, 367 cuber, with a 223/230/110 cam, that;
At about 2800, liked up to 60* to cruise with, and made phenomenal fuel mileage there.
That cam dropped lobes and I replaced it with a 230/237/110 cam. This new combo cannot even come close to the former numbers. I cruise it with an overdrive now, at 65=2240, and the cruise-timing is not there anymore ; just about 52* total with the dial back at 9retard/6advance, at 2240. I run this engine on 87E10 full-time, and the all-in WOT Power-Timing has been delayed to 3400, which is 25mph in first gear, with tires not spinning. After that,at WOT she runs on 32/34 full Power-Timing.
My Vcan is on the sparkport.
I run the Dial back at 9R/6A, because;
I have a manual trans, and the Idle-Timing is 14*. When I retard the timing with the DB, the timing drops to 5* and the Idle-speed to 550 in gear, without changing the transfer slot synchronization. At 550 in gear the roadspeed is slow enough to parade in, 4mph. But with the T-slot sync'ed up, the engine takes throttle right away without any tip-in woes.
The 6Advance is good on a cold engine to idle it up, again without upsetting the T-slot sync. So I get good drive-away manners. After two or three minutes, I dial the extra advance out, unless I am in Cruise-Mode.
But here's the thing; there have been occasions where I have forgotten to dial the timing OUT when I reached my destination. And so, it has run full-time with the extra 6 degrees timing, and I never noticed it, until it idled down, with a faster than usual idle-speed. Otherwise, the engine never made a peep.