Question about my Dynamic number
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Joined: Feb 2000
Posts: 1,248
From: Bountiful, Utah
Re: Question about my Dynamic number
Lord look over me as I train wreck my own thread 
...
If you set total wot timing to lets say 24 degrees and there is no knock detected while in a pass it will add timing till burst knock is detected then it pulls it back down till knock activity has stoped. The timing control of the factory LT1 ECM is closed loop and with the opti's Hi-res signal it makes it all happen. Bret have you tried zeroing the data in the Minimum spark advance table. It seems that this is where the additional timing comes from at least in my testing/log files from wot testing.
...If you set total wot timing to lets say 24 degrees and there is no knock detected while in a pass it will add timing till burst knock is detected then it pulls it back down till knock activity has stoped. The timing control of the factory LT1 ECM is closed loop and with the opti's Hi-res signal it makes it all happen. Bret have you tried zeroing the data in the Minimum spark advance table. It seems that this is where the additional timing comes from at least in my testing/log files from wot testing.
Last edited by Hot Rod Hawk; Mar 21, 2005 at 09:26 PM.
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Joined: Oct 2002
Posts: 6,518
Re: Question about my Dynamic number
Man I'm not the guy to ask about that thing. Those ECU's are not my favorite thing. A good Big Stuff, DFI or FAST always seems like the way to go with me. They are made to be user friendly, don't have a rev limit etc..... Hell a carb and a MSD Pro Billet Digial looks like a better way to go to me.
The thing I never get is you set the timing on the tables and then pull out a timing light and read it or even data log it and it doesn't correlate, WTF is that all about?
Bret
The thing I never get is you set the timing on the tables and then pull out a timing light and read it or even data log it and it doesn't correlate, WTF is that all about?
Bret
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Joined: Dec 1969
Posts: 1,431
From: Pacific North West
Re: Question about my Dynamic number
Thank GM for that Jim and I mapped it out. I think Hawk is on to the right tables. it is RPM based. I hav enot looked in a While I just always know the curve so i punch in the numbers as needed
Jim and I mapped it out. I think Hawk is on to the right tables. it is RPM based. I hav enot looked in a While I just always know the curve so i punch in the numbers as needed
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Joined: Oct 2001
Posts: 1,462
From: smog zone adjacent to a great lake
Re: Question about my Dynamic number
Originally Posted by Hot Rod Hawk
Bret have you tried zeroing the data in the Minimum spark advance table. It seems that this is where the additional timing comes from at least in my testing/log files from wot testing.
Thread Starter
Registered User
Joined: Feb 2000
Posts: 1,248
From: Bountiful, Utah
Re: Question about my Dynamic number
I've not toy'd with a obd2 just obd1 stuff but I'd still think it would apply. On a OBD1 the table is named Minn spk advance and from zero RPM too 4000 RPM the data is set at zero advance then from 4400 rpm to the upper limit it's set at 10 degrees on a factory tune. Think of this table is a "adder" table to the base timing table[s] named "load vrs advance". If no burst activity is picked up by the Knock sensor it will add additional timing up too the value entered in minn adv. The rate of the advance is based off of the data in the attack vrs RPM and decay vrs RPM tables for retard.
...oh my head
TRy setting min advance too zero in all fields on hose/boost tunes.
...oh my head
TRy setting min advance too zero in all fields on hose/boost tunes.
Last edited by Hot Rod Hawk; Mar 24, 2005 at 08:35 PM.
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