So I rebuilt the engine, added Corksport HPFP internals and a Corksport Stage II Short Ram Intake, and got the OTS+ tune from Freektune.
Everytime I drive my A3 it feels like it’s as fast the MS6. So today I went out in the MS6 and had someone else drive the A3 and we did pulls side by side starting in 2nd at approx. 2500 RPMs (up to maybe 70mph). They were basically the same speed.
It turns out I did have a boost leak when Freektune was doing the OTS+ revision. I don’t know how much it affected things, if any. But maybe there’s more leakage. I’m going to buy a boost leak tester (I don’t want to make one).
It seems to me even with even just modest upgrades and the OTS+ tune, the MS6 should be a bit faster than the A3…