She's running under full power !

[Steve C]

Hi Rob

Your solution for the VSS is brilliant.

Something occurred to me a while ago regarding the VSS, what happens when you put the car on a dyno, will you get a error code because the front wheels aren't turning and operating the VSS?

Maybe someone else has got around this, but I thought that you could spin the VSS with an electric drill at the appropriate time to avoid error codes.

Steve

[Eatoniashoprat]

Originally Posted by Steve C

Hi Rob

Your solution for the VSS is brilliant.

Something occurred to me a while ago regarding the VSS, what happens when you put the car on a dyno, will you get a error code because the front wheels aren't turning and operating the VSS?

Maybe someone else has got around this, but I thought that you could spin the VSS with an electric drill at the appropriate time to avoid error codes.

Steve

When I was figuring my van out I just had the ecu VSS wire, a 5v wire and a ground. I would just touch the VSS wire to the ground and 5V a couple times and even if it was very slowly it would work. For most of the ECU's I don't think the computer cares what the speed of the VSS is saying as long as it has a signal that goes from 5V to ground continuously. This is just my experience. So for the dyno you could just do that during the run and hopefully it would work.

[Rob]

Originally Posted by Steve C

Hi Rob

Your solution for the VSS is brilliant.

Something occurred to me a while ago regarding the VSS, what happens when you put the car on a dyno, will you get a error code because the front wheels aren't turning and operating the VSS?

Maybe someone else has got around this, but I thought that you could spin the VSS with an electric drill at the appropriate time to avoid error codes.

Steve

As much as I'd love to take credit for the solution, It's not mine
The guys at the Subaru-Vanagon group came up with this.

As to the Dyno question: the VSS is on the rear axle, so it would work just fine

Rob.

[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

[Eatoniashoprat]

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

Ya my van is still subaru ecu but I have a Apexi Power FC for the beetle. The one problem with the little VSS simulator circuit that I have is that it is on all the time, so the high idle you get while driving the car is there all the time. I would be nice if when stopped it would idle down some. I think I'm going to try the reed switch idea seems it seems fairly cheap and easy/quick.

[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.