Sensor Question (and the usefulness of cam sensors)

[clayb]

> From: "Bruce" <nacelp at bright.net>
> > That said, I've found that cam triggering of ignition is definitely
> > inferior, especially when a timing chain is involved. With a distributor
> > firing my turbo 454, timing would bounce at least 5 degrees, while the
> > distributorless ignition stays rock steady.
> > There can be no doubt this has an impact on my ability to tune near the
> > edge of detonation.
> 
> At idle it would wonder that much?, or thru out the rpm range.
> How big of cam?.
> Bruce

It wasn't always that bad at idle, but it did wander noticeably. Seemed
the worst timing accuracy was when the engine ran at constant speed,
like 2000 or 3000 rpm. Any slack in the system is then noticeable. Under
smooth acceleration, the chain and gear are preloaded in one direction.
Cam is 241/234 degrees.

- Clay

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