Some recent talk of X heights...

Mine from factory is 19 1/2.

Please correct me if I am wrong, but I understand that the X-Dimension is the distance from the center of the propshaft to the center of the crankshaft....

DragonFire,
It's measured from the center of the prop shaft to the running surface directly in front of the drive.

Thanks Lofty.....

I've had that eroneous info in my head for8 years....

It is center of crankshaft to running surface. Otherwise 19.5" would be pretty high! It is usually around 18+"'s

Dave....from what i have heard there is about 3-4 to be had with -2 Sportmasters and herring 6 blades.
This is an 06 42 that has the power and X height to run 92mph....this "IS" the best setup 42 Ex out there.
http://www.chicagofountain.com/details.php?boat_id=147

Back4More, you said the word "power". It is my understanding that you need extra power to run these ultra high x-dimensions. I was told that simply raising the x-dim on a boat like mine (HP500 powered) will not gain speed unless I add HP. Is this true?

The term "power" was meant that this Ex is a 92mph setup with the 600SCi's

That is 5 mph better than my Ex 525's. GPS before it broke was at 87. That's alot of coin for 5.

I am already wanting to go faster go figure, need to save up some coin and get in upper 90's or 100 sooner than later. Sounds like TomCat Rtech is working on something for 525.

You went so fast you broke your GPS?