Spark Tuning

Dave Zug dzug at delanet.com
Fri Jul 30 15:28:32 GMT 1999


Don't think I've seen this subject and thought I'd get a head start 
on it...

Background:  1989 5.7l TPI, 165 ECM, ARAP (vette 350) BIN, 
Supercharger, alum 200cc intake runner heads, stock compression, 
13.50 quarter mile on 5 psi boost w/ stock chip.

What I plan on doing is subtracting 8 or 9 degrees from the stock 
main spark table.. going for a few runs, checking the data... then 
bumping all the load / rpm values that did NOT knock up a degree, and 
all the ones that DID knock down a degree (lower --> toward 0 btdc).

Now WOT spark advance I see is available to me as well. that's not 
what I'm doing right now. and I know I gotta get the fueling right 
to be able to start the sparking stuff, correct?

If I can get a large range represented in the 1 run of recorded data, 
then I may be able to feed it into a (this is getting old I know) 
utility that will spit out a new table (just looks at rpm, lv8, knock 
and decides +1 , 0 , or -1, pretty easy)

I've thrown out my guess on procedure here.. if anyone has the "real" 
way please educate us! thanks.
~~~
Dave Z. www.delanet.com/~tgp



More information about the Gmecm mailing list