PDA

View Full Version : First Tune on 4L60E



Gordon0652
July 10th, 2008, 01:49 PM
I just got the program today, but i have been learning the demo for about a month now.
So what i wanted to do is raise the shift points on my trans. just to see what i can do myself.
They were set @
1 -> 2 6000
2 -> 3 6000
3 -> 4 5900

I changed the values in D0910-22 to the correct KMH to match the RPMs.
Changed Part throttle 1-2, 2-3, 3-4, starting @ 81.3 TSP% to the correct KMH to match the RPMs.
Changed the values in D0940, 41, 42, 45, 46, 47 to 6200 and D0950, 51, 52 to 6000.

I just did this to see how the program works.
Is there any tables i am missing to change? Please name them, and how to go about correcting them.

Thank you

KMMG

joecar
July 10th, 2008, 02:28 PM
D0910 and D0940 must both be met for the WOT 1->2 shift to trigger.
Same with D0915 and D0945 for WOT 2->3.
Same with D0920 and D0950 for WOT 3->4.

I will refer to each of those as a "pair".

You may want to set one of the pair lower so it is met first... i.e. the shift is triggered by the other of the pair...

otherwise if both values of the pair match each other, the shift may be "late", especially if you have a converter.

Gordon0652
July 10th, 2008, 02:36 PM
The "Pairs" are off set by about .4-.75
Is that okay, i forgot to say that.

joecar
July 10th, 2008, 02:41 PM
For example...

Say 80 MPH in 2nd gear equals 6000 RPM...

If you want WOT 2->3 to be at 80 mph, set D0915 to 80 mph and D0945 to 5500 rpm.

If you want WOT 2->3 to be at 6000 rpm, set D0915 to 70 mph and D0945 to 6000 rpm.

Gordon0652
July 10th, 2008, 02:43 PM
Okay,
I understand that!
I'll give it a try, and Thank You Joe!

TAQuickness
July 11th, 2008, 04:06 AM
I was just about to point your ls1tech thread to this section.

Gordon0652
July 12th, 2008, 10:30 AM
How does this look?
Help with changes....?:doh2:

http://i11.photobucket.com/albums/a192/gordon0652/untitled.jpg

Gordon0652
July 12th, 2008, 10:46 AM
Also what should i set my "part throttle" shifts at?

joecar
July 12th, 2008, 10:00 PM
Leave the PT shifts alone... if you do tweak these, do so in small increments only, as this will produce a noticeable early/late shift.