PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Modifying spark timing?

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Old Mar 26, 2004 | 11:00 AM
  #1  
brianw21's Avatar
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From: Boise, ID - USA
Angry Modifying spark timing?

Can anyone lend any suggestions to fix my spark timing in LS1edit for my blower car? As you can see the tuning that Diablo did still has 29 degrees of timing under boost.. which is causing KR.

What should I change and check in LS1 edit?

Here is the log...

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Old Mar 26, 2004 | 11:26 AM
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In LS1 edit you would change the High Octane table under the ignition tab. HTH
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Old Mar 26, 2004 | 11:43 AM
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Your MAP only shows 15PSI, is the blower doing
anything? I guess you're at a higher elevation but
this is near ambient unboosted for us flatlanders.

If you put the Predator spark to its -10% setting
you should see a max of about 24 degrees on the
"canned" tune. That would take out 5-6 against
current (though I had to put it to +10% to get
30 degrees, maybe you are just getting more
natural spark than me). If you took the canned
tune out, that would strip off 6 degrees or so, too.
Don't know if you can adjust spark off the stock
tune or not. How much do you need to take out,
what amount of KR is coming in?
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