top end speed

should i be getting more than 37.4 mph out of my boat...that is at 4600 rpm stock prop on a 04, X9, 310 horse....the prop is a oj 12.5x21..there is just over 20 hours on the motor!!

my 02 x star, would get 47 with the 310hp and the stock prop

but my 04 x 80 with the 8.1ho 450hp and the stock prop will only run 38, kinda frustrating

Are you sure it's only going 37.4 mph? That seems a little slow at 4600 rpm. My '01 Malibu V-drive w/325 hp motor tops out at about 47 mph at about 5000 rpm, which is dead nuts on with my hand held GPS. GPS doesn't lie. At 4600 rpm am at about 42 mph.

how ould you barefoot behind my a boat that only goes 37 1/2 ...seems kinda lacking for a tournment boat!...your X80 is like 28 feet long...thats a lot of weight...38 in that i can understand....my X9 is just 21'....

X80=big pimpin

the P.P. reads 37...havenot ran it with a GPS....even if the P.P. was 10% off that is still just 41.

My PP is off by about 5-7 mph at the higher speeds as well. Why?, I have no idea. I think maybe where the paddle wheel is located it doesn't completely see "clean water". The water temp. probe is mounted pretty close to the paddle wheel and maybe causing some disturbance. Regardless I use rpm mode at for skiing. The PP is accurate at low speeds according to my GPS for wakeboarding at about 18-22 mph. I finding the PP seems to work pretty good in rpm mode at low speeds as well.

I guess the answer to my question lies in a global positioning system

Congrats on that X-80, thats a Pimp'n boat, o wait I get it, I guess with that last name you get anything you want, Just messing with you..

I don't know how Wakeboard Pro works, but on our Digital Pro, we have to adjust the speedometer once we take it through the course and calibrate it. When we run the magnets and get the correct RPM it asks to adjust speedo. That can change the speed by a couple mph on ours usually.

jude,
When we got our boat both the PP & regular speedos were off by a lot, but they didn't agree either. Get yourself a cheapo GPS & calibrate both with it. (There is a way to calibrate the speedo on the Wakeboard Pro model.)

You should be running at least 7 or 8 mph faster than that. If your speedos are correct, your boat may be propped incorrectly.

How can you adjust the speed on PPWP? I cannot find my owners manual and I know it is off by a couple mph.
Ryan,
Why would you spend 100K on a boat that only goes 38mph?

Perfect Pass has downloadable manuals on their website. They also have a simulator that you can use for dry land training.

Thanks Karl.

Perfect pass pro has magnet kits that allow you to run through the slalom course and calibrate it automatically.

Who cares how fast your boat can go. I didn't buy my ski boat to go fast I bought it so I could pull 3 skiers out of the water and not have to worry about it. The real question is does your boat function correctly/accurately for what you bought it for. If your worried about top end speed, re-pitch the prop but you'll sacrifice hole shot performance.

I think Jude is just angry cause my boat gets up quicker and goes faster than his. Its a mans-size thing!!

But- it could be cause he had some extra poundage in their though.

I have a three blade acme and Judes is 4 blade stock.

I am pretty sure my boat runs an almost perfect 1:100 ratio, cause I GPS'd it before and it seemed accurate comparing rpm's to gps. I think it topped around 42-45mph and rpm were 4200-4500.

My boat is also narrower and shorter than his.
1988 nautique 2001

Jude if we go to the lake I will bring my GPS.

I hear you. Have fun getting it all dialed in. All I know is that I have owned 5 power/ski boats in my lifetime to date and it really pays to research the market and test drive the crap out of them before you buy. If my buddies '01 Malibu didn't have 1200 hrs, yes 1200 hrs I probably wouldn't of bought what I did. He's like the poster child for Malibu. He ski's probably about 3-4 time a week all year round. Performs regular maintenance on his boat and other than a little wear and tear the thing runs as good as the day he bought it. It really pays to listen to the people using the products out there in this industry.

paul, i am kinda upset that a 100K$ boat will only fun 38, but 90% on its on water time is tied up in the cove with the stereo on blast

Ryan,
You should talk to your dealer about the speed. It doesn't sound right. If it is right, then I am sure you will have just as much fun if the thing ran 45. When are you going to post some wake pics?

hey luke i think the only reason you got ahead of me was the way you were standing on your seat hunched over smacking your a#$ like a jockey!!!

bring that GPS this weekend

Everyone else thank you for your help!! I am going to adjust the speedos agenst Luke's GPS...that is if his brother doesnt loose it overboard like my anchor

(Message edited by macdaddy on July 07, 2004)

i will get some pics of the wake this weekend, i always forget to get pics once we start partying.

My 83 Supra Sport does 45, at 4500 rpms.... and gets there in just a matter of a few secouds.... Gotta love that Chrysler 440

how fast does that 440 get you to the gas pump!!!