Re: First GN chip

[JTesta1966@aol.com]

In a message dated 3/25/00 5:09:18 PM Eastern Standard Time, 
nacelp@bright.net writes:

<<  If ther isn't enough  retarding per temp, then that
 could explain alot of head gasket failures...  I got to look closer at this.
 Grumpy >>

In a stock cal there is *no* retard by temp. All locations are $00. Actually, 
Air temp isnt a retard table, its an advance table. I guess you could merely 
start with a lower than normal timing map and advance at lower temps. As you 
reach higher temps the value would fall back to the original lower than 
normal value. Did that even make sense?  ie: 100% load table might be:
2400 RPm and up... 23  25  24  23  23  22  20  19
but using IAT might be 22  23  22  21  21  20  20  17

But with IAT correction at say 90* air temp of +2 across the board but +0 at 
say 100* air temp...thereby retarding timing using the advance values..or 
whatever..you get me now I think.

There are however coolant temp corrections that are decently significant, and 
might somehow interpolate with IAT in the calcs somewhere.. (like 
guestimating what IAT will be)

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Jim Testa                                         TType86 on #BuickGN
jtesta1966@aol.com                               buick.fiendish.net:6667
ASE Master Technician            NJ Lic. Motor Vehicle Inspector
L1 Adv Eng Perf Certified     NJ Licensed Emissions repair Tech
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