For what purpose? I go handling first on track cars. If it’s drag performance weight and engine make a similar impact for shorter sprints. I don’t have any post-update info however.
Still works. My 1.3, 2.3, 1.3 still wins or ties 2.3, 1.3, 1,3 in all but 1 track but cant remember which that was. Against all 1.3, wins all but ties on 1/4m drag, 0-100 and 0-120 if I recall.