I've done a search and to my understanding the cool comp.spark table subtracts those values(degrees) from the timing for that particular temp in open loop only???? I've been adding to this chart to improve cold start idle(starts up fine but idles low and rough) but based on what I've read/comprehend I am taking away timing????

 

Less then 400 RPM and your just using the ignition module.
The easy answer is do a data log, and watch what's happening, to see what works/ feels, best.

 

If Im not remember it wrong the cool temp vs SA is subtracting SA in Closed loop....atleast in the $58code.

/N.

 

I would but my scanner does not show timing..... I thought it was only a factor in closed loop..??? Does it subtact those values(degs.) in open loop?? t.i.a.

 

The scanner will show what is really going on. I am amazed that you are shooting for 11's without knowing the timing of that engine. The scanner is well worth the money.

A timing light would also give you the same information.

 

Have a scanner just does'nt show timing.Have timing light but can't produce a load and use it. I suppose I could use the timing light to verifytiming when cold,change values(timing) and see if anything changes but I would have to keep them all the same(timing) so that there is no discrepency going from varying temps and load???Back to the question at hand.... do the values represent neg. timing when in open loop???

 

The coolant compesation SA table is always in affect. Open loop, closed loop, or in between loop. The SA values from that table can add or subtract timing. The final compensation value is the result of the compensation table value minus the bias value.

RBob.

 

I've just been experimenting with bias, cool comp. & such as well.
RBob,
What you said makes sense. For the $42 code, tunerpro shows a warm bias and a cold bias. Does the ecm subrtact one or the other? If so, where's the breakpoint? Playing with values, both bias values seem to have an effect at operating temp (190-195 F)
Any insight?

 

shows a warm bias and a cold bias.

Each of these are for a different SA table. The warm bias pertains to the main SA table. While the cold bias pertains to the coolant compensation table.

RBob.