VZ to 3.9's speedo calibration

[Strueth]

Hi all - I have confirmed a 2005 VZ Monaro (auto) ECU can be calibrated to 3.73 ratio via Tech2 as it was a stock Holden diff ratio for some other cars. I can't confirm whether anyone can calibrate a speedo to 3.9's other than via the Jaycar box, which I'd rather not use. My question is has anyone successfully swapped out their diff ratio from stock to 3.9's and managed to have it tuned electronically either by ECU or via cluster to suit? Cheers, Streuth.

 

[Lex]

Its calibrated by the cluster.
If the tech 2 scan tool doesn't work, enyvous customs tool will work. https://www.envyouscustoms.com/diagnostics/softwares/body-diagnostics/

 

[gtrboyy]

corrector box is for the old 5 litre efi cars...ls can be recalibrated much easier tech2 etc most tuners charge $100-$200 the last time I asked about it

 

[Tonner Matt]

The adjustment is made by altering the PPK value in the cluster...…….PPK = Pulses Per Kilometre
It's not a big job at all for someone that knows what they are doing

My VZ 1 Tonner's speedo was corrected while it was on the dyno being tuned
The fella tuning it noticed the speedo was reading incorrectly and adjusted it for me while he was doing the tune at no extra charge

 

[Strueth]

Thanks everyone for your advice, I made contact with enyvous customs who have this issue solved. You've no idea how much running around I did before it dawned on me to spend 5 minutes on here with a request for help. Cheers.

 

[EYY]

Yep I used their program to program a few different cars VT-VZ for diff/fuel tank sender changes etc. Very good but a shame it’s a subscription service. I’d be happier to pay a larger, once off fee.

 

[Strueth]

Yep I used their program to program a few different cars VT-VZ for diff/fuel tank sender changes etc. Very good but a shame it’s a subscription service. I’d be happier to pay a larger, once off fee.

EYY - Mine being just a one off job is easier for me to remove the ECU and send it down to the guys at enyvous customs who are going to do the setup there. I will no doubt learn by my mistakes otherwise and f__k the whole shebang up in the process which is not something I want to do with an ECU.