How high can i set the line pressures to firm up the shifts before it can cause damage to the trans?

Factory setting seem to max at 90 in my tunercat in the Main Line Presure tables at above 90% throttle.

I have heard not to increase them too much, but i want harder shifts, but am afraid to blow something testing.

Is there a max pressure to not go over or you will be sure to break something?

 

I have heard that some other people have set their Line Pressure to 115 above 75% throttle, I am going to take it from this information that those are somewhat safe #'s.

I have moved the pressure up to 115@WOT an left everything set to factory below 50% throttle, and just smothed out table from 50-100%.

I can't load it or test it today because it is snowing hear and I don't drive my car in the snow!

Do these #'s sound good or does anyone have any suggestions, also does HPPIII increase line pressure to get the firmer shifts?

 

When I had an A4 I had mine set to 115 over 80% throttle and had no problems.

 

thanks that fills me with a little more confidence, but does any one know if this is how hypertech and the other chip manufactures firm the shifts? If not how do they do it? I read a couple of files that said they had firmer shifts but I didn't see anything different then my stock file.

 

AFAIK this is the only way to do it with LT1 edit. If you have OBDII I can send you a file or two with modified tranny tables.

 

96z,
Ok what exactly does AFAIK stand for I have tunercat, so if I have to look for a similar table in there that would work. My car is an OBDI car, but if you want to send a file or something to me that I could just look at or take the general idea from and put into an OBDI file, go for it I'm just trying to do what i can to do things without hurting my car.

 

AFAIK stands for As Far As I Know. I think all the files I have are OBDII, Ill check. If I have any OBDI's Ill send them to you.

 

Man do I feel stupid right now, I read your post first thing yesterday morning. I must have been still asleep or something, because when you said:
I took it that AFAIK was a synonym for a table in LT1 edit, like Air Fuel something something something. Sorry about that one, I guesss I should have realized that it was a start to a bad day yesterday!

 

The Hypertech program modifies the Shift firmness vs Temperature table, to give you more "bite" at lower temperatures. The lower the number ... the more aggressive the force motor operates, makes the shift firmer.

The Hypertech may do other things as well, but I was not able to see any other changes referencing the transmission shift firmness.

My LT1 editor file is posted on my website if you want to have a look. Lots of changes in there, but it is holding up to my driving habits ( Severe duty ... ) ... and it shifts pretty nice as well.

Hope this helps

LWM

 

Thanks thats great I will jump over and look at it now, again thanks!

 

LWM,
Thanks for sharing that file, but after i converted it to a .bin file and read through it the only thing i see changed is the MAIN LINE PRESSURE MODIFIER VS CURRENT GEAR table in TunerCat. Was this the table you were refering to or can anyone else out there shed light on this for me? Thanks again for the feed back!

Oh by the way after it gets a little later in the day (I don't want to wake the neighbors this early on a sunday morning) I am going to be loading the program with the increased line pressure and testing that out, I'll keep whoever is interested posted.

 

I guess there must be a few differences between Tuner Cat and the LT-1 editor.

I did increase the main line pressure about 10%, but that I did on my own.

The Hypertech program affected the "Shift firmness vs Temp" table. That Tuner cat does not see that table leads me to believe that the Hypertech program may very well modify things that the LT-1 editor does not see as well.

Hope this helps

LWM