Greetings,
Just got my KPro and am doing some basic street tuning off a base map until my favorite dyno shop comes back on line (they've had to move). One thing I noticed is that my VSS signal is quite erratic. I'm fairly certain this is due to a sticking speedo cable, as I also see a little bit of bounce in the speedo display itself.
So the question is, does it matter if the VSS reading is screwy? Car is NA and I don't see anything in the calibration that is speed related, but I may have missed something.
Attached is a datalog showing the VSS bounce. I've also attached the KAL, for reference. Car is an EF hatch with an ITR K20A swap using a rywire harness, and uses the original cable VSS.
TIA,
--Andy
VSS...Does it matter?
VSS...Does it matter?
You do not have the required permissions to view the files attached to this post.
For sure, I do intend to fix it. And I'm pretty sure it is the cable not the speedo, since the needle wavers on two different speedos I've had in there (one with a tach and one w/o).Spunkster wrote:It is either a cable problem or a problem with the seedometer in the cluster as that is where the VSS is located. This should be fixed.
But...does it matter to the KPro? Is there anything that depends on the calculated speed/gear?
Today I did find a gear-based ignition compensation which had some values in it for the baseline kal I used (ITR, Toda intake/header, etc.) and so I zeroed that out for now. Anything else?
--Andy