A4 Trans tuning question.
02-20-2005, 04:26 PM
#1
Staging Lane
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A4 Trans tuning question. I have HPTuners V 1.6. My car is a stock A4 z28 with LTs and thats about it. I copied Jimmyblues trans setting from his excel spreadsheet and the car shifts great and I like everything except...
when i go WOT the car hits the rev limiter before the shift from 2-3. This is at 84-85 mph. Can someone look at my bin file please and let me know whats going on? I also made a new bin with the stock TCC settings and kept the rest of JimmyBlues numbers but to no avail.
Thanks
when i go WOT the car hits the rev limiter before the shift from 2-3. This is at 84-85 mph. Can someone look at my bin file please and let me know whats going on? I also made a new bin with the stock TCC settings and kept the rest of JimmyBlues numbers but to no avail.
Thanks
02-20-2005, 05:19 PM
#2
Originally Posted by way2slow
I have HPTuners V 1.6. My car is a stock A4 z28 with LTs and thats about it. I copied Jimmyblues trans setting from his excel spreadsheet and the car shifts great and I like everything except...
when i go WOT the car hits the rev limiter before the shift from 2-3. This is at 84-85 mph. Can someone look at my bin file please and let me know whats going on? I also made a new bin with the stock TCC settings and kept the rest of JimmyBlues numbers but to no avail.
Thanks
when i go WOT the car hits the rev limiter before the shift from 2-3. This is at 84-85 mph. Can someone look at my bin file please and let me know whats going on? I also made a new bin with the stock TCC settings and kept the rest of JimmyBlues numbers but to no avail.
Thanks
every tranny is different if your hitting the rev limiter move your shift point rpm or mph down till it stops.
02-20-2005, 05:47 PM
#3
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I could be confused but My trans is set to shift at 82 in the WOT Shift Speed Vs Shift table. I am hitting the rev limiter which is at 6200 (stock) My WOT Shift RPM Vs. Shift is at 6000, 6000, and 5900. From what I understand it should shift into third when the mph is >=82 and when the RPM >=6000. My RPM is exceeded as I am hitting the rev limiter and this is happening at around 84-85. 
02-20-2005, 08:15 PM
#4
like i said every tranny is different...just because it meets the criteria to shift doesnt mean your tranny will shift at that very moment...i had my Z setup to shift at 6500 and 90mph on the 2-3 and it shifted at 6799 and my rev limiter was at 6800 lol so yah you'll need to move down the rpms usually for the 2-3 to get it more in line.
02-20-2005, 09:12 PM
#5
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Originally Posted by foff667
like i said every tranny is different...just because it meets the criteria to shift doesnt mean your tranny will shift at that very moment...i had my Z setup to shift at 6500 and 90mph on the 2-3 and it shifted at 6799 and my rev limiter was at 6800 lol so yah you'll need to move down the rpms usually for the 2-3 to get it more in line.
02-20-2005, 09:43 PM
#6
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"Performance" mode does not ever get active in
the F-body. Bummer. Just ignore it.
The RPM and the MPH are where the shift -starts-
to get going. It had better get done before the RPMs
rise to the limiter. The shift at WOT starts when the
-last- of the conditions is met. At part throttle there
is only one condition (MPH, at your present TPS).
Things like a converter can really change the relation
between RPM and MPH. Gears, too, but this is not as
"elastic" as the converter - even a seeming unrelated mod,
if it adds torque at the shiftpoint, can suddenly make you
start tagging the limiter as you will drop more RPM across
the converter, satisfy MPH later.
the F-body. Bummer. Just ignore it.
The RPM and the MPH are where the shift -starts-
to get going. It had better get done before the RPMs
rise to the limiter. The shift at WOT starts when the
-last- of the conditions is met. At part throttle there
is only one condition (MPH, at your present TPS).
Things like a converter can really change the relation
between RPM and MPH. Gears, too, but this is not as
"elastic" as the converter - even a seeming unrelated mod,
if it adds torque at the shiftpoint, can suddenly make you
start tagging the limiter as you will drop more RPM across
the converter, satisfy MPH later.
02-21-2005, 01:03 PM
#7
Staging Lane
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Puzzled Jimmy,
Do you think that the TCC settings would be causing this? The reason I ask is that today I changed the settings again but with the same results. Raised the rev limiter to 6300, set the 2-3 shift Mph at around 78-79, and the 2-3 shift RPM at 5900. This time the log shows me hitting the limiter at 6300, 88mph? I guess I am going to have to start from scratch with my own table.
Do you think that the TCC settings would be causing this? The reason I ask is that today I changed the settings again but with the same results. Raised the rev limiter to 6300, set the 2-3 shift Mph at around 78-79, and the 2-3 shift RPM at 5900. This time the log shows me hitting the limiter at 6300, 88mph? I guess I am going to have to start from scratch with my own table.
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02-21-2005, 02:09 PM
#8
again like stated in your case it wouldnt start to shift till 5900 on the 2-3...the 2-3 for most fbodies is very sluggish...my recommendation is to try shifting it at 5600 on the 2-3 see where it shifts, then in 50rpm intervals move it up...remember tranny temp will effect where it shifts at too...so if your temps are at 140 and it shifts at 6100 at 200 degrees it might not shift till 6250.
02-21-2005, 02:46 PM
#9
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Originally Posted by foff667
again like stated in your case it wouldnt start to shift till 5900 on the 2-3...the 2-3 for most fbodies is very sluggish...my recommendation is to try shifting it at 5600 on the 2-3 see where it shifts, then in 50rpm intervals move it up...remember tranny temp will effect where it shifts at too...so if your temps are at 140 and it shifts at 6100 at 200 degrees it might not shift till 6250.
Last edited by way2slow; 02-21-2005 at 03:15 PM.
02-21-2005, 03:43 PM
#10
i usually dont mess witht he tcc settings unless someone puts in a converter or cam...with just a converter i usually lockup earlier so you get a little better gas mileage...with a large cam i usually dont allow it to lock up ini 3rd gear and end up raising where it locks up in 4th...you'll loose some gas mileage but gain some driveability.
02-21-2005, 05:33 PM
#11
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Try checking your HOT table. I'm beginning to suspect that might be messing with my shift points. I haven't been able to check it out, but mine shifts too early & that was the ONLY table that had numbers that matched my shifts. Worth a try.....
02-22-2005, 10:32 AM
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Good point about the HOT table, check that your
trans temp isn't so high that you flip over to that
one. Even short of HOT mode the thinning of the fluid
along with the force motor table changes w/ temp
can make the trans shift slower, weaker.
Check that you have a reasonable shift pressure vs
load, and have lowered your adaptation times to
something reasonable. Some people have problems
with zeroes in that table but you want less than the
stock times (way too leisurely for my taste).
trans temp isn't so high that you flip over to that
one. Even short of HOT mode the thinning of the fluid
along with the force motor table changes w/ temp
can make the trans shift slower, weaker.
Check that you have a reasonable shift pressure vs
load, and have lowered your adaptation times to
something reasonable. Some people have problems
with zeroes in that table but you want less than the
stock times (way too leisurely for my taste).
02-22-2005, 11:37 AM
#15
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Originally Posted by jimmyblue
Good point about the HOT table, check that your
trans temp isn't so high that you flip over to that
one. Even short of HOT mode the thinning of the fluid
along with the force motor table changes w/ temp
can make the trans shift slower, weaker.
Check that you have a reasonable shift pressure vs
load, and have lowered your adaptation times to
something reasonable. Some people have problems
with zeroes in that table but you want less than the
stock times (way too leisurely for my taste).
trans temp isn't so high that you flip over to that
one. Even short of HOT mode the thinning of the fluid
along with the force motor table changes w/ temp
can make the trans shift slower, weaker.
Check that you have a reasonable shift pressure vs
load, and have lowered your adaptation times to
something reasonable. Some people have problems
with zeroes in that table but you want less than the
stock times (way too leisurely for my taste).
02-22-2005, 01:05 PM
#17
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Originally Posted by foff667
there shouldnt be a need to scale your map if all youve done is a lid, filter, and tb. At least i sure as hell didnt and still didnt have any issues tuning my tranny.
02-22-2005, 08:46 PM
#18
for engine tuning, it doesn't matter if you have more air registering in the maf, or compensating for it in ve, 2x3=3x2 sort of thing.
however, and this is a big however, a bunch of other stuff is scaled off maf too (trans stuff for example) so if maf is off, everything else will be off.
so mr foff, i'd highly recommend recalibrating your maf, i guarantee improvments. i've done it in two cars, one of them having ported TB as the only mod and the whole VE was off by 10-15 points. i calibrated the maf, plugged it back in, and the whole VE jumped back to ~0, without me massaging the VE tables at all.
try it, it doesn't hurt
however, and this is a big however, a bunch of other stuff is scaled off maf too (trans stuff for example) so if maf is off, everything else will be off.
so mr foff, i'd highly recommend recalibrating your maf, i guarantee improvments. i've done it in two cars, one of them having ported TB as the only mod and the whole VE was off by 10-15 points. i calibrated the maf, plugged it back in, and the whole VE jumped back to ~0, without me massaging the VE tables at all.
try it, it doesn't hurt
02-22-2005, 09:29 PM
#19
Originally Posted by RedHardSupra
for engine tuning, it doesn't matter if you have more air registering in the maf, or compensating for it in ve, 2x3=3x2 sort of thing.
however, and this is a big however, a bunch of other stuff is scaled off maf too (trans stuff for example) so if maf is off, everything else will be off.
so mr foff, i'd highly recommend recalibrating your maf, i guarantee improvments. i've done it in two cars, one of them having ported TB as the only mod and the whole VE was off by 10-15 points. i calibrated the maf, plugged it back in, and the whole VE jumped back to ~0, without me massaging the VE tables at all.
try it, it doesn't hurt
however, and this is a big however, a bunch of other stuff is scaled off maf too (trans stuff for example) so if maf is off, everything else will be off.
so mr foff, i'd highly recommend recalibrating your maf, i guarantee improvments. i've done it in two cars, one of them having ported TB as the only mod and the whole VE was off by 10-15 points. i calibrated the maf, plugged it back in, and the whole VE jumped back to ~0, without me massaging the VE tables at all.
try it, it doesn't hurt