Sample rate

[boltor]

Just starting off with VCDS logging on my Golf R. Not really getting a very high sample rate. See attached output, showing just over 1 sample per second.

Have read the following and played with various settings with no real luck. "turbo" doesn't seem to do much either.

4.8 How can I speed up my sample rate in VCDS?

The sample rate for viewing and logging data is largely determined by each controller in the car. There are a few things you can do to speed up the rate for a given controller. First, logging one group at a time, rather than two or three, will help greatly. In order to get the highest sample rate possible go to the Options screen and set Blk Int to 25 and Char Int to 0. Note, however, that this may cause unreliable communications with some controllers. Changing KP2 time to a smaller value speeds up the sample rate in Measuring Blocks on control modules that use the KWP-2000 protocols. Try setting it to 0. If any of these adjustments cause unreliable communications, change them back closer to the defaults. If in doubt, use the Restore Defaults button!

In Engine controllers using KWP-2000, there is a [Turbo] button when using a HEX interface.. This can significantly speed up sampling, in some cases to over 30 samples per second. See the Measuring Blocks page for more information. In Engine controllers using UDS, there is a "Group UDS requests" checkbox that can improve sample rates. See the Advanced Measuring Values page for more information.

Anyone care to offer suggestions on better rates?

thanks!

Output file (stage 1 tune):

[Guy_H]

You could always go and work for APR - ECU Explorer - ~ 40 fields at up to 100 samples per second directly out of the ECU itself.


It's hard to work with VCDS when you are trying to fine tune things and your RPM sample points are so far apart....

[Ryan_R]

Do you have the cheaper MicroCAN VCDS cable or the more expensive HEX one? The latter has faster sampling rates.

[boltor]

You could always go and work for APR

Guy - APR would need to be in real trouble if you would employ me! Your company would go broke pretty quickly I think...

[boltor]

Do you have the cheaper MicroCAN VCDS cable or the more expensive HEX one? The latter has faster sampling rates.

expensive one from Ross-Tech - HEX-USB+CAN. Probably could have purchased the micro, but I wanted to use it on my Audi as well.