type 9D2 speed

[Hubert Mensch]

Hello,
I have GWX 3.0
I just upgraded to type 9D2 from 9B, and the speed of the boat is not the expected 19.3knots, but a max 18 knots at flank speed. It's a little slower than my 9b ! Is this a bug ?
thxs in advance

[Jeff-Groves]

Any Mods added?
SH3 Commander used?

[Hubert Mensch]

Any Mods added?
SH3 Commander used?
no mod other than GWX, and no SH3 commander. I remember when I played vanillia sh3 that the IXD2 was faster so i wonder is it a bug in GWX3.0