How many loggings before a perfect chip is burned?

[Erik VanRenselaar]

Just wanted to know an *average* of how many times people log data and re-burn (or burn new) chips before you get an IH SV-V8 GM TBI-EFI setup *dialed*?

Are you getting sick of my questions?

[Bill usn-1]

No right answer...sorry.
Some guys bolt a stock 350 system on their 345 and never touch it.
others play with them quite a bit.

The fuel will be real close after 1 and near perfect(if there is such a thing) after 3.

Timing is up to the individual and the motor.

[Erik VanRenselaar]

Thanks, Bill. One to three *tuning sessions* sounds reasonable. I do not want to be fooling with it eight or nine times, though.

And I am thinking about going with a *full on* conversion when I do it; meaning TBI unit and DuraSpark-ed Holley *gold box* distributor w/ GM module for both fuel AND spark control from the ECM. The setup will also use an EGR solenoid to operate the stock EGR.

Any reason to start *small* and do fuel-only at first, then go with the spark control add-on?

[Bill usn-1]

To do fuel only will require additional components so it's not worth it.
Just build it the way you want it from the start.

[Tom Mandera]

Mine was so far off the chart it took a few chips just to get it to stop going "full lean" all of the time (and still running rich).

Once I got into the realm of adjustability, one or two chips got things pretty darn close.

I still need to adjust the cold-start routines a bit more.