If you spend a nav token to activate engine techs, will that activate Wulffy's ability?

Yes.

Have fun with perpetual Tokens.

In order to Trigger Engine Techs, you need a Navigate Command.

In order to trigger Wulff Yularen, you need to Spend a Token.

You can trigger Engine Techs with either a Dial or a Token... If you use a Dial, then you can trigger Techs, but there's no Token for Wulff.

In all cases, you get the full Navigate Effect that the Dial or Token allows you (Speed Change+Yaw Increase, or just Speed Change, respectively)...

What Wulff does not let you do (and what his FAQ entry states) Is that you can't immediately Re-Spend the Token for an ADDITIONAL bonus... This is more applicable with the Engineering Token, for example:

If you had a Dial and a Token, you could Spend both for a whomp of points, and then re-place a token onto the ship due to Wulff. It does not allow you to re-spend that token for more points immediately, as that would be a second activation of the command.

Thanks! This in no way confirms my list for the Vassal Team Tournament. This question is just a coincidence. Yeah, that's what it is.