tta

[stagemonster]

what numbers are on the stock chip for the tta. I dont have the stock chip in my tta and i have it in a case with the stock chip for my gn and iam try to tell the difference so i can put it back in my car.

 

[2QUIK6]

I'll try to remember to look when I get home, I have the stock TTA and GN chips labeled in a bag in my chip drawer at home.

 

[stagemonster]

Thank you very much ive been wanting to put the stock chip back in my tta for some time now and havent been able to tell the difference between the 2 of them.

 

[2QUIK6]

There is a silver sticker on the back side of the chip that covers the erase "window", on the GN its "BBKJ" which I remeber there were 2 different ones depending if it was the recall chip or not, and on the TTA chip it has "APXB" on it.

Used to be a page on gnttype.org that explained each of these codes but it appears that site is gone again.

 

[stagemonster]

thanks for the info.

 

[2QUIK6]

Oh yeah, the stock TTA chip will have way to much timing at WOT for todays fuel, it has 26 degrees at 4400-4800 rpms WOT and the GN chip has 22 degrees.

 

[dennisL]

I just saw this thread and it made me wonder if I could find my old files on these chips. Well I found them and just for your records the ecm adds to the main advance table so the actual spark advance comparision for TTA vs. GN at WOT is:

TTA at 4400 RPM and above, with airflow of 192 - 255 g/sec = 27.1 degrees
TTA at 3200 - 4400, with airflow of 192 - 255 g/sec = 21 - 25 degrees

GN at 3200 RPM and above, with airflow of 224 - 255 g/sec = 23.2 degrees