HP tuners questions
HP tuners questions I just bought HP tuners. I have a 1999 TA and need some advice on TM and Shift points. The only mods are LS6 intake and ported TB. Any advice on what to set the shift points at?
For any gear, tire, converter combo there is a
different WOT MPH and RPM match.
My philosophy is this -
1) Rev limiter for safety - if you don't know any better,
don't go over 6200.
2) RPM to barely clear the rev limiter, but consistently.
Give it a couple of hundred RPM, maybe more on the
1-2 if you've got a light slippery torque converter or
more power. If you set the MPH values low, the RPM
will control the upshift. So you can dial it as close as
you want, but leave a little room for slop.
3) MPH to barely clear RPM
The MPH linkage to RPM is not very consistent. The
throttle position (power output) against converter slip
can make a difference of several hundred RPM at speed.
If you program a higher MPH than the equivalent RPM,
the shift may hang "unsatisfied". So you want to creep
the MPH up from their low setting until you feel them
start to change the true shiftpoint (upward). Then back
off the MPH by 1 or two, and try it at full, 3/4, as low
as you can go and still have WOT (Pred display will show
static 0.00 LTFT numbers in WOT), make sure you don't
ever hit the rev limiter and you're good to go. On a 3.23
car set up this way 41 MPH 1-2, 82MPH 2-3, 125MPH 3-4
are OK by my experience. If you tag it, back off.
I would set the firmness and adaptation time params first
because these affect shift cycle timing and how much slack
you need to reserve against the rev limiter.
different WOT MPH and RPM match.
My philosophy is this -
1) Rev limiter for safety - if you don't know any better,
don't go over 6200.
2) RPM to barely clear the rev limiter, but consistently.
Give it a couple of hundred RPM, maybe more on the
1-2 if you've got a light slippery torque converter or
more power. If you set the MPH values low, the RPM
will control the upshift. So you can dial it as close as
you want, but leave a little room for slop.
3) MPH to barely clear RPM
The MPH linkage to RPM is not very consistent. The
throttle position (power output) against converter slip
can make a difference of several hundred RPM at speed.
If you program a higher MPH than the equivalent RPM,
the shift may hang "unsatisfied". So you want to creep
the MPH up from their low setting until you feel them
start to change the true shiftpoint (upward). Then back
off the MPH by 1 or two, and try it at full, 3/4, as low
as you can go and still have WOT (Pred display will show
static 0.00 LTFT numbers in WOT), make sure you don't
ever hit the rev limiter and you're good to go. On a 3.23
car set up this way 41 MPH 1-2, 82MPH 2-3, 125MPH 3-4
are OK by my experience. If you tag it, back off.
I would set the firmness and adaptation time params first
because these affect shift cycle timing and how much slack
you need to reserve against the rev limiter.
