yes, more vibes
I noticed more vibration between 1900 and 2200 when I went to
DD3's. When I add more fuel with the box(DDUFM), I get even more vibes at the same rpms. Vibes stop as rpms go up. I just figured it's the load on the engine from more fuel and as the engine speed catches up with the fueling it relaxes a bit. Of course it's more noticable with the TC locked up.
Does this make sense? It works for me.
TC