VY L67 Manual T56 Tuning Advice

General Tuning Questions And Discussions
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Joined: Thu May 14, 2020 8:52 pm

VY L67 Manual T56 Tuning Advice

Postby Mr Tippins » Tue Apr 27, 2021 12:44 am

Hey all,

I've converted my L67 Series 2 VY Calais to manual (T56 with Malwood Adapter plate), I'm trying to get the tune sorted. I've got an NVRam Module and an ALDL Cable from this website, I'm running a stock The1 Enhanced tune with the Manual Trans Flag set.

I've had a look at threads on this website and I think I've got my head around a good method of tuning and what I want to achieve. I'm just very unsure of how to go from here, the issues I have are:

Speedo is well out (about 58%), I think I need to change the "VSS Ratio - Speed Constant for Automatic Transmission" setting, but when I do the speedo doesn't change, the sensor doesn't seem to be working when logging either...

Car will occasionally stall coming up to a corner with the clutch in, I think this is related to either the "Desired Idle Speed (Drive) vs Coolant Temp C" or the "Desired Idle Speed (Neutral) vs Coolant Temp C" setting. The car seems to do it more on cold nights :think: :think:

Finally, I want to disable all the auto related settings, to name a few I am sure about, the "AT Max Gear RPM", "AT Maximum Upshift Speed (kph)" "AT Maximum Downshift Speed (kph)" and the TCC related settings. Although if there is no harm in keeping them... then I guess I'll leave it? I just don't think they need to be there.

I need some advice and pointers on the matter.

Anyways, thanks in advance for any replies.

Posts: 2
Joined: Thu May 14, 2020 8:52 pm

Re: VY L67 Manual T56 Tuning Advice

Postby Mr Tippins » Wed Apr 28, 2021 12:54 am

So small update, figure I should write things down in case anyone else wants to know the answers.

Regarding the Speedo, that has nothing to do with the PCM, I believe it just "passes through" so the PCM knows whats going on, the calibration has to be done with a Tech2 or similar BCM / Dash editing tool (Envyous Customs do some software, its proprietary tho)

The idle issues should be sorted by copying over some of the stock getrag manual v6 tune, I assume that I can copy and paste most of it, I just have to figure out what I need to copy over rather than closing my eyes and guessing.

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Re: VY L67 Manual T56 Tuning Advice

Postby The1 » Wed Apr 28, 2021 11:05 am

the pcm uses the speed sensor mainly for return to IDLE. So if you have changed the flags correctly to manual and getrag, then copy over the IAC Tables from the getrag tune that should get it 99%

Yep the VY Cluster has it's own PPK that can be adjusted

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