Reference Angle

[Ward Spoonemore]

1. The ECM is active on the falling edge of the DRP, (this is the Dist ref
Pulse). 
2. the ECM has a calib val for sorting any static timing lead, 4 deg in big
block, 0 fo small blocks.
3. the ECM obviously can not advance the timing( else we have time travel),
It generates a pulse son number of usec's after the DRP, this corespondes to

some number of degrees befor the next DRP, (not yet happened)

Ward

On Mon, 08 Mar 1999 21:45:02 -0500, Jason Weir wrote:

> With all this talk of DIS  and SyTy proms and the reference angles
> between the pickup firing and TDC, can anyone tell me what the correct
> angle between the pickup firing and TDC is on a 7747 system would be. 
> Would this be built into the ignition module or is it adjustable with in
> the code? I looked through the code that I have and I didnt see any of
> the variables referenced by Ted (KREFANGL & KMAXRTRD2) but that really
> doesn't mean that they don't exist.  Due to the fact that my
> distributor/pickup  is a non-GM unit and right now I have the pickup
> firing as close to TDC as I can get but now I am not sure this is
> correct.  just some more food for thought.. 
> 
> Jason Weir
> -- 
> 88 Wrangler
> 258, 4.0 head, Cherokee header, 2 1/2 exhaust with high flow cat &
> Flowmaster
> GM TBI, Crane 260H Cam
> TJ Fender Flares
> http://home.att.net/~jweir





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