She's running under full power !

[Rob]

Originally Posted by Steve C

Hi

The VSS that I have is one that hooks up to the speedo cable, so if I dyno my car I would need to make arrangements to trigger it. I'm pretty sure the VSS. informs the management software that the car has stopped, you wouldn't want to have an error code show up during tuning.

I now have plug & play Autronic SM4 ecu for my car which has an Autotune feature, I just need to buy O2 interface for it and then I could do most of the tuning on the road.

Steve

Ah, Now I see

When the stock ECU does not see a VSS signal it will limit the RPM's to 3500 (or so).
So yeah, tuning with only 3500 RPM wouldn't work so great

Rob.