Some light on the gearcase stuff and going 130mph in an Allison.
The gearcase that Titus and I have developed was done because I was having a hard time keeping a 200 or torquemaster case together for any length of time. The skeg would eventually crack below the torpedo and we figured this was for two reasons. First, the skeg was thin and adding the tab behind it made the skeg "lever arm". Second, the torpedo thickness is pretty thin and causes the skeg to "roll"adding to the problem. The torpedo and skeg on a sportmaster is thicker by quite a bit. So we proceded to come up with the sportmaster mod. It is NOT quicker than a 200/coned case done up in the SAME manner. It is equal. That was the trick, to get it to equal the 200 case. Compared to a stock sportmaster it is anywhere from 4-10mph faster,( depending on the boat etc.) but so was my 200 case. What we have is a case that is super strong but yet yields the best performance. That is the whole story and the "why" we did it in the first place.
As far as running big speeds in a XB2002, I owned a bass racer for 4 years with some serious power on it. I have given rides , yes rides, at speeds aproaching 120. ( it had a sport console and side by side steering) The ultimate problem with it is the airflow over the deck. At speeds above 120 it would take exponential power to run, lets say, 130mph. More power than is avalible. The XR2002 that I ran 130 with was actually pretty easy to drive and run at those speeds. Much better airflow and the boat would take a nice "set". The point or problem here is the airflow causes the boat to pop it's tail(XB) and you then have to use the motor to hold the nose up. This takes power. The faster you go the worse it gets. Now we could cover the deck but that's defeating the purpose of the "bass" boat I would think. Having my old bass racer over 120 many times I can tell you that it takes some distance to do it with stock power. My set up was not for top speed but just the way I drove the thing around. I had enough power to get it to those speeds. This is the same motor that ran the XR to 130 in a standing start 1/2 mile and the River Rocket to 140 in the same distance. Could a XB2002 run 130? with enough power to overcome the handling issues, yes. How much power? 400 plus is my guess.
Hope this is of some interest and I didn't bore you guys with my long posts.
Randy
