setting ignition curves without dyno

[Bruce Plecan]

-----Original Message-----
From: Robert Wilkinson <rw at ccwf.cc.utexas.edu>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Wednesday, November 11, 1998 1:16 PM
Subject: setting ignition curves without dyno


>I spent quite a bit of time setting my ignition advance (with DFI) to
>highest advance without setting off knock sensor.  I did this for all rpm
>at WOT.
>At the track, the car had no power down low, so I retarded the timing in
>low rpms.  The car ran pretty strong down low after that.
>
>This is telling me that my car doesn't want max advance (without setting
>off knck sensor) at lower rpms.
>Can anybody recommend a good method for finding the advance needed for max
>power at lower rpms.... without a dyno??

The easy way is buying a G-Tech ($150).
  They DIY way is using the VSS and running that thru a counter and stop
watch.  Mine ignores the first two tire revolutions, and then
counts 100 revolutions ie 600'ish.  Stop Watch was a $20 radio
shack, and times only matter for a comparison.

Also in the tuning notes at 332 ftp, you'll notice I repeat again,
and again.  It's the least amount of timing with no lose of performance that
you tune too.  On some applications with can be
as much as 4 degrees, less than the knock point, at high rpm....
Also, if you look at the timing tables there, now that you've seen
what you've seen they will make more sense....
Cheers
Bruce
                 I'm sorry if I seem to rattle on at times, but I just keep
                 repeating things so many times, and when I say read the
                 archives, I get some rude responses..
>
>Robert Wilkinson
>
>