I'm going to show my ignorance again lol. I would like to adjust the amount of lockup on the converter to 100% or what ever the safe maximum is. But I am having trouble finding the perimeter to accomplish this feat?
I'm going to show my ignorance again lol. I would like to adjust the amount of lockup on the converter to 100% or what ever the safe maximum is. But I am having trouble finding the perimeter to accomplish this feat?
1998 GMC Sierra K1500 5.7/4L80E, longtubes, 411 w/COS 5, marine cam/intake, Whipple. 91 octane at 6000'.
1997 GMC Sierra K3500 7.4/4L80E, 411 w/COS 3, Whipple, small cam.
2004 Corvette Z06 with longtubes.
99% is close enough to 100%, you won't be able to feel/see any difference.
As for GM using low minimum % values (in case you wondered about this):
GM tries to apply the TCC "smoothly", which means is slips as its apply ramps up...
a quicker non-slipping apply is better for the TCC;
note that the TCC is applied under almost steady speed non-WOT conditions, so applying it quickly (with no/minimal slip) is fine.
The key is: after any trans changes you make in the tune, be sure to test drive and analyze what happened.
Totally. I'd bumped my 1500 by 20% and I think the 3500 by 30%. 1500 seemed to respond better which is why all 100% sounds appealing for the 3500 which also has a tighter converter so less of a chance of being harsh.
1998 GMC Sierra K1500 5.7/4L80E, longtubes, 411 w/COS 5, marine cam/intake, Whipple. 91 octane at 6000'.
1997 GMC Sierra K3500 7.4/4L80E, 411 w/COS 3, Whipple, small cam.
2004 Corvette Z06 with longtubes.