Stealth-252, better top speed in '05

[Stealth Marine]

As we have begun the process of building the new 2005 model changes, I had our first chance to take a new boat out on the water yesterday for some trial runs.
As a result of a 0.5 inch change in the X-dimension of the Outdrive placement on the transom we were able to squeeze out another 3-4mph. While this may not seem like a huge amount of speed, everybody always wants MORE at the top end.
It was interesting to note the huge impact of the proper prop. Don't underestimate the value of testing a couple different props on your boat.!
In our case we tried 3 different props yesterday behind a 496Mag engine.
22 Pitch = 60.4mph GPS
23 Pitch = 65.3mph GPS
24 Pitch = 66.7mph GPS
The next step will be to build up another test boat with a 496Mag HO and Tabs on it. Previously we were only getting 67mph out of our HO configuration. I now expect we will get something in the 71-72mph range instead. The goal is coax her to 75mph. Will be fun to see if we can do it or not.

[phebus]

Just curious, what were the rpm's with the tested props at the given speeds?
In our case we tried 3 different props yesterday behind a 496Mag engine.
22 Pitch = 60.4mph GPS
23 Pitch = 65.3mph GPS
24 Pitch = 66.7mph GPS

[PHX ATC]

Sounds like decent speeds I would think.
Keep up the good work and reporting on it, it's interesting stuff.

[Stealth Marine]

Just curious, what were the rpm's with the tested props at the given speeds?
In our case we tried 3 different props yesterday behind a 496Mag engine.
22 Pitch = 60.4mph GPS
Rev Limiter engaged, Horn Sounding
23 Pitch = 65.3mph GPS
Rev Limiter engaged, Horn Sounding sometimes
24 Pitch = 66.7mph GPS
4900rpm

[Stealth Marine]

Sounds like decent speeds I would think.
Keep up the good work and reporting on it, it's interesting stuff.
Slow but sure.
I got my first look at the new Fiberglass Inner-Liner for the boat yesterday.
Should have the first hull with a non-carpeted floor in a couple weeks.
One step at a time we ARE building the boat with the features everyone asked for here in the forum.

[THOR]

CP,
those are good speeds for a large boat with that motor. Congrats.
Lab that 24P and you could see a tad more maybe.

[dicudmore]

As we have begun the process of building the new 2005 model changes, I had our first chance to take a new boat out on the water yesterday for some trial runs.
As a result of a 0.5 inch change in the X-dimension of the Outdrive placement on the transom we were able to squeeze out another 3-4mph. While this may not seem like a huge amount of speed, everybody always wants MORE at the top end.
It was interesting to note the huge impact of the proper prop. Don't underestimate the value of testing a couple different props on your boat.!
In our case we tried 3 different props yesterday behind a 496Mag engine.
22 Pitch = 60.4mph GPS
23 Pitch = 65.3mph GPS
24 Pitch = 66.7mph GPS
The next step will be to build up another test boat with a 496Mag HO and Tabs on it. Previously we were only getting 67mph out of our HO configuration. I now expect we will get something in the 71-72mph range instead. The goal is coax her to 75mph. Will be fun to see if we can do it or not.
Good good

[Stealth Marine]

CP,
those are good speeds for a large boat with that motor. Congrats.
Lab that 24P and you could see a tad more maybe.
How much?
1MPH ???

[dicudmore]

How much?
1MPH ???
I would venture to guess 3 if everything was right :wink:

[BoatFloating]

I've seen Lab Finishing scrub some speed off or do nothing at all. It all depends on how good the stock one was. You can get lucky and have a good stock prop also.