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
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