101 clarification

[steve ravet]

Bruce Plecan wrote:

> There is a spark adder, called main spark bias, which moves the
> entire table up or down in value.   So lets say your at 0 degrees
> advance with a spark bias of 10 degrees.   If you drop the spark
> bias to 0 then your initial timing of 0 becomes -10.   There are some
> engines that are fussy about the initial timing, and spark bias.
> Generally I find alot of engines like 6d initial, a spark bias of 6.
> Now just to really foul things up/and/or confuse them there is a cold
> spark bias.  Normally I have a fair amount there (15ish).  Then with
> the above 16-20d BTDC idle timing.
>     Whiether this actually pushes the timing to AFTC I don't know,
> till after I get the bench stuff running.  From test driving it seems to,
> but I have trouble setting timing by seat of the pants.

So Bruce, do you know where this main and cold spark adder is in the
PROM map?

Also, just out of curiosity, the VE table from your tuning notes peaks
in the 60% range.  That seems low...  Is that table really a measure of
VE, or is it just values that work?

--steve


--
Steve Ravet
International Meta Systems
http://www.imes.com
steve at imes.com