Top end

I have an all original 84 with close to 1000hrs.....getting about 45 on gps @ 4400rpms using a acme 540

Show us some pics, we like pics

Have a good one!

easy Don, Joe's boat is nowhere near stock and should not be used as the example. he's pushing well over 450 horses and has shredded several shafts to prove it. Kostas is way closer to what the typical 2001 will do. if you get up towards 50 without making serious performance upgrades you're ahead of the curve. this conversation can quickly deteriorate into a dollars for mph conversation. those 50+ numbers are out there, but you have to pay the price of admission for the ride. unless the boat is yellow of course, everyone knows yellow boats are faster, Joe's is blue so he had to compensate with more engine.

TRBenj wrote: Electronic ignition, a much bigger prop and power trim... 60mph is a cake walk.

Not an EI conversion on your existing distributor!!

Tim,
Fill me in on the power trim?

I have gotten my 92SN past 60 mph.
(On the trailer, on I-4!)

As hinted at above, it is not as simple with an inboard to throw a higher pitch prop on and trade some holeshot for some top end. The faster you go the more the nose of the boat tends to be forced down meaning the more hp you need to displace water.   Anything above 57 on a 2001 hull gets squirrely in terms of steering, and it takes doubling the hp of the engine.

Thank you Joe for your reply. Clearly you have experienced some speed and the limitations of the 2001.. I had been thinking a propeller might gain me 5 or so mph.I bought my boat for what it is designed to do.Water ski boarding and the like. I had wondered if a simple prop change might add some to the top end .For instance what might it take to gain 5 mph. I knew from way back that the hull will only go so fast. Thanks for explaining what happens as speed increases. Had a squirrely speed boat in the past. Not at all my interest any more than spending mountains of money to accomplish it.
Did you have these speed experiences by making a series of changes over time? Can you tell me what would be required for moderate gains? Thanks for sharing. Any pictures of the boat you mention. I would enjoy seeing them. At what speed does the speed of the boat deteriorate the handling properties? For me the optimum would be a bit more speed maintaining the sort of handling any 2001 operator is sure to love.Again thanks for your time. Brian

restored82 wrote: Can you tell me what would be required for moderate gains?

Brian,
I'm sure Joe will speak up but Donald has too.

Donald80SN wrote: the ACME 540 Prop seems to be the ticket for the most bang for the buck. You can put GT40P heads and a better intake to help it breath and you will notice a difference. .

Thanks for your input Donald..Gt 40 heads along with a performer intake .How much horsepower gain would that change produce.   How would that translate in gained mph?I already have the Acme 540 .It seems to function comparably to the 13x13 that came stock. Better hole shot though I think than the 13x13. Looking at their website there are many propeller options. A lot I noticed in the four blade configuration. Would any of those add a top end advantage? Thanks to everyone else who has responded as well . Your input is valuable research for these ideas I question.

I is a slippery slope but- some fresh gt40p heads a set of 1.7 to 1 roller rockers, and an intake manifold to go along with a 540, makes for a pretty fun and reliable ride with minimal cash outlay.   If you are feeling foggy feel free to port match the intake and exhaust manifolds and conside removing the mufflers- the sound will certainly make it feel faster.

"The engine horsepower (or watts) needed to move a boat through the water goes up with the 3rd power of the speed This means that to go twice as fast we need an engine with 8 times the horsepower."

8122pbrainard wrote: "The engine horsepower (or watts) needed to move a boat through the water goes up with the 3rd power of the speed This means that to go twice as fast we need an engine with 8 times the horsepower."

Pete does that equation cover most hull designs? i would think it would vary greatly

Or since he's Canadian, put in a metric speedometer...and instantly top speed goes from 50 to 80 with no upgrade necessary, eh?

Mine didn't have one Don,I wonder if liability issues in the 60's was different from the 80's? Or maybe Holman Moody didn't want their secrets out for the competition to steal so a production engine was reinstalled ? I guess we will never know.....   What we do know is you'll be kicking yourself some day for letting that one get away,that's for sure!

All this focus on the top end, what about the bottom end, nothing like a good stern and ya gots to have sum junk in the trunk!!

He's a giver Don, just trying to spread cheer during the holiday season