Without looking back to see what my actual numbers were on my last Pulsare.....I think I was getting around 88 with a 28 Trophy and 90+ with a 29 Tempest....GPS. Both were stock out of the box from merc. The set-up was a 300XS, 14.5" set back, TM case.
The Trophy, though slower, was for sure the best handling, best feeling prop on the Pulares I've had. The hole shot was unbeatable, very responsive thru the midrange, and cornered excellent. The Tempest ran well, too, but not as good overall.
Re: Steering - needs to be tight...if you have hydraulic, purge it over and over again when installing.....up to 10 times more than the manual indicates. You should be able to get zero play or close to it.
Re: solid mounts - The merc racing motors even the consumer versions (ex: promax, XS) have solid mounts. When I look back to when I drove my Starflights with the older Black Max motors and XRI's there was a big differrence, so my personal observation would be that solid mounts help alot. I don't think that rubber mounts are a main cause of chine walk, but do contribute to it. Solid mounts make it much easier to control for sure.
Re: setback - I really haven't seen this to help much with chine walk issues....but it defintely improves top speed....If your main objective is to go faster, go with as much setback as you can. If your a skiier/wakeboarder, stay with a normal amount.
All "vees" will chine walk at high speeds...just can't stay put with all that boat out of the water, it wants to fall side to side, just a matter of gravity. Good steering and solid mounts will help, alot, but will never eliminate it all together, you have to do that yourself by balancing it as you drive.
The Pulsare hull really won't chine walk much at all (a little, but nothing major) until you get it moving up around 80. I know some of you guys know this, others have not had a chance to get that speed. Where it gets real tricky is the 90 mark....you have very little boat in the water....I've had the bow come up where it alomst felt vertical, on flat water, by getting stupid with the trim button. If your not ready to ease it back, it can flip.
Lot of fun. Go with tight steering & solid mounts, be safe.
-Craig