X dimension on a 41
 

Anyone know what they're running for an x-dimension on the new 41s? I going to put new drives on my 96 since I'm repowering and was wondering if I can go with a 2" shortie.

Spoke with Steve yesterday, looks like I'm buying a 2" shorties and 5 blades :D

Can't wait to see everything done! You wont be the slow boat any more! :)

I'll pick up the crown for you! ;)

You were always the slow boat, shouldn't you be posting in the slow pig resin bucket forum anyway? :D :hitfan:

I like slow boats...fast boats suck!

:D:D

I was looking thru old threads before asking my question and came across this one. Any news on how the shorties and 5 blades performed?

Steve/Ken are working on my 39 which I just repowered. I used XR's with 2" shorty IMCO's. In the process of fine tuning, initial slippage was high (17%) they will be adding 1" spacers. Initial run was with 32 pitch, 5 blade Maxium's. Will also be looking at differences with Hydromotive props. Should be re-testing in next week - will update you on next run.

I ran the fastest with 1 in shortys 20in x and 5 blade hydros.
And I tried them all.

17% doesnt seem that high to me?????

I think for the boat, power and setup 10-12% is the mark we are shooting for. Always trade offs between top end, coming on plane and mid range acceleration. The big question is how much time and money do I want to spend in trying to hit the mark

what #'s are you hitting now , with how much power . What gain are you looking for , are there any other mods you are thinking about doing ?

Whippled 525's dyno'd at 775 HP/790 ftlbs torque each spinning 5600-5700 rpm's. Drives are 1.5 ratio. Theoretical speed would be between 113-115 mph. With noted slip ratio should be around 100-103 mph. First time out ran 94. Couldn't do any triming on the boat because it would hit the rev limiters. As a result bow was riding lower than it should. Adding 1" spacers and changing props should make significant difference. Not really planning on changes beyond that - at least at this point.

That boat should see big #'s , I am looking forward to seeing what prop is selected . My staggard 41 needs more bow lift and I am going to try raked wheels in the spring . I run those same #'s ( 5700-5800 ) with a set of re-worked 30 4 blades . Also have some standard 33" 4 blade same top end at 5500 . Hope to get some bow lift and loosen things up , expecting to be at around 100 when I'm done .

Mr Velocity - if you're still around clear you PM box so I can send you a msg.