Took the 30 for a test drive

Andy · 09-14-2009, 09:28 PM

On saturday I took the old 30 footer for a blast. I have 5 hrs on the engines and they are broken in. Tried my 30p rotating in, acceleration from 40 to 75 in about two seconds. Props way too small. Got a set of 32's 3000rpm 46mph 3500-55mph raced a 32 Sunsation Dominator with 502's and vortec blowers hit 89mph @ 5600 mph and 2psi boost and passed him slowly. Holly crap this boat is a drivers boat. At 80 mph I hit the tabs, bad idea, chine walked like a mother. Pulled the throttles back to half stuck the tabs down and pinned it again. I need more prop, a set of 34's, and more seat time or I will get bit hard. This boat will definatly go over 100 with more seat time. One thing I do notice is that at a fast cruse 50-60 if I hit even a small 3 footer the props will cavitate and loose there grip for a few seconds then hook up. I need to know the Xdimension and where to properly mesure it from. The boat originally came with speedy 2's I have TRS and I think that they are shorter.

Padraig · 09-14-2009, 10:43 PM

Sounds like you had a grand time.

You might want to call the factory and talk with Steve about x dimension etc. I have always found him willing to help.

Velocity Vector · 09-14-2009, 11:16 PM

Glad to see you out ripping up water Andy...My 34's are ready to ship. "X" dimension is the distance "on" the transome from the intersection of the boat bottom and transom ( drive location) to crank center to place the prop shafts at the desired heights.
This "X" dimension ends up being the "measurement" as you have to draw a line extending your running surface and then measure straight down from the crank centerline until the two lines intersect. "X-dimension" and "Prop-shaft height" are not the same thing.

Center line to prop shaft center line when trimmed parallel with the extended hull keel line and measured at right angle to that keel line. (not along the slanted transom) Prop shaft height (which is the dimension that most prop builders want to know in order to set you up with the right prop) is the distance, again measured at right angle, from the extended hull keel line to prop shaft center line, and again trimmed parallel. Don't make me come up there....

notda1 · 09-15-2009, 08:35 AM

the trs and #2's are different lengths , I think #2's are longer , but not sure how much

excalibur82 · 09-15-2009, 09:47 AM

the number 2's are 2 inches long than the trs.

Pat McPherson · 09-15-2009, 02:37 PM

If you spin the props out, the boat will likely be more stable.
I know that requires swapping the drives, but...
Sounds like a vary fun ride...
Be safe!

notda1 · 09-15-2009, 06:23 PM

If the difference is 2" , can't you just add spacers to the drives to get the right height ? Also not sure how prop diameter affects the formula . In my old 30 I was told not to run over 16" and stay with 3 blades or it would affect the way it handled . I ran 3 blade 32's on #3's with props turning in and they had a very low slip factor