Ignition Timings

[Diehl, Jeffrey]

I didn't see any replies to this but find it very interesting.  If there
were any follow-ups, forgive me.  So, why do we think this timing is
constant?  Is it simply the amount of time it takes for the plugs to fire?
It clearly isn't related to piston position.

Inquiring minds...

Mike Diehl,
MR-2, '87na


> -----Original Message-----
> From: Corner Paul [mailto:Paul.Corner at icl.com]
> Sent: May 17, 2000 3:34 AM
> To: 'diy_efi at diy-efi.org'
> Subject: Ignition Timings
> 
> 
> 
> Hi All
> 
> I've been messing about with the ignition side of my ECU, 
> writing new code
> and grafting it to the fuelling software....
> Working out the initial advance tables from the original 
> advance curves. I
> noticed that when the data is converted from degrees/RPM to 
> mSec before TDC,
> it remains fairly constant from tickover to 4500 RPM.
> Question is - can I use this time constant up to, say 6500 
> RPM, rather than
> messing around with look up tables etc. Perhaps, at a later 
> stage, when the
> engine is running and the hardware has been tested, the 
> software can be
> rewritten to use look up tables. It really depends on how 
> much advance is
> required above 4500 RPM.
> 
> Regards, Paul.
> 
> 
> --------------------------------------------------------------
> --------------
> To unsubscribe from diy_efi, send "unsubscribe diy_efi" 
> (without the quotes)
> in the body of a message (not the subject) to 
> majordomo at lists.diy-efi.org
> 

----------------------------------------------------------------------------
To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org