24 PSI...300 hp Jetski . . . I want - Miata Turbo Forum - Boost cars, acquire cats.

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Old 05-07-2011, 09:43 PM   #1
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Default 24 PSI...300 hp Jetski . . . I want

Went Jetskiing with my buddy today. . .
he has a 03 honda turbo jet ski.
Rough mod list includes:
autronic ECU
larger injectors
bigger turbo
custom intercooler
MSD coils
Upgraded impeller
Upgraded Titanium lifter springs

We swapped back and forth between that and his dads run of the mill jet ski

HOLY ****. I have never been on a jet ski that pulled so hard. This thing is NUTS. you punch it, wait about a half second and boost comes in so strong you have to hold on tight. The thing is just crazy fast, and with the impeller there is no cavitation, it just gets up and go as if it was on drag slicks and a prepped track. I gotta say, the original owner put some serious cash in this thing. We ran it at 10 PSI most of the day, and brought it up to 22 PSI. Its a strange thing hearing that turbo.

I had my gf on the back at one point and she was going nuts trying to hold on.

At 24 PSI this thing is around 300 HP. INSANE.

Craigslist photos...probably will crap out in a few days:


Attached Thumbnails
24 PSI...300 hp Jetski . . . I want-3m33p33l65v35t25r6b493f9065007d40109b.jpg   24 PSI...300 hp Jetski . . . I want-3n53oe3l85w55u45p5b49fad4a60bb4831f0d.jpg   24 PSI...300 hp Jetski . . . I want-3n93p33l25z15p25x5b49a4c22a8b20991572.jpg  
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Old 05-07-2011, 09:49 PM   #2
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want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want
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Old 05-07-2011, 10:16 PM   #3
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Quote:
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want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want want
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Old 05-07-2011, 10:41 PM   #4
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I used to work at a Yamaha dealer, and rebuilt a Waverunner last summer. They are boosted with a Rotrex. Funny though, it says "HKS" on the compressor housing. But it is a Rotrex. Looked big too... at least a C30-74. It only runs at 8PSI and makes 220hp. It would be sweet to up the boost on it. But it's driven right off the crank so that's not possible. I can't imagine a turbo though, having the boost hit like that. Must be nuts.
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Old 05-07-2011, 11:23 PM   #5
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A friend of mine in Key West has one of those. I'm pretty sure it is still on the stock turbo, but even so....it's insane to ride.
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Old 05-08-2011, 11:15 AM   #6
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I know nothing, absolutely nothing, about jetskis. How much hp does a normal one have?
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Old 05-08-2011, 11:20 AM   #7
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Quote:
Originally Posted by icantthink4155 View Post
I know nothing, absolutely nothing, about jetskis. How much hp does a normal one have?
Same here. I didn't even know they made turbo jetski's... Now I'm searching craigslist and found a supercharged one. Insane.
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Old 05-08-2011, 11:48 AM   #8
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I think the stock turbo from the factory was 160. Most are much less
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Old 05-08-2011, 11:56 AM   #9
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Just think of it in motorcycle terms. A lot in the 100 range, plus or minus 50 depending on their advertised performance, roughly. I've always wanted to build a turbo rotary pwc.
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Old 05-08-2011, 12:01 PM   #10
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The new ones are heavy, some are 1200lbs. Mine is a 450lb 97 seadoo gs 2 seater has 90 hp and is faster under all conditions than every new 150-160hp seadoos I've encountered.

That said there is a guy I know who has a faster ski it's a RXTX 255hp factory supercharged seadoo. Those aren't a whole lot faster top speed wise but accelerate like a ****. I haven't been in water with a honda yet but have seen others.

I don't know much about other brands except that most people have had reliability issues with anything but seadoo or honda.

I tried the whole I want to turbo my ski argument with the wife and I think the best I'm going to get away with is swapping out the .72L for a .79L (90 -> 110-120hp + more upgradeable) if I can ever kill the little engine.

The boosted skis really drink up the fuel don't they.
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Old 05-08-2011, 12:11 PM   #11
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jesus that thing must be awesome. I was at lake lanier last year in GA and rented a jet ski, over 40 mph it started to get really choppy. Got it up to 50 I think and thought I was going to die lol. I cant even begin to imagine the pants shitting that would ensue if I played with that thing
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Old 05-08-2011, 12:44 PM   #12
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Quote:
Originally Posted by inferno94 View Post
The new ones are heavy, some are 1200lbs. Mine is a 450lb 97 seadoo gs 2 seater has 90 hp and is faster under all conditions than every new 150-160hp seadoos I've encountered.

That said there is a guy I know who has a faster ski it's a RXTX 255hp factory supercharged seadoo. Those aren't a whole lot faster top speed wise but accelerate like a ****. I haven't been in water with a honda yet but have seen others.

I don't know much about other brands except that most people have had reliability issues with anything but seadoo or honda.

I tried the whole I want to turbo my ski argument with the wife and I think the best I'm going to get away with is swapping out the .72L for a .79L (90 -> 110-120hp + more upgradeable) if I can ever kill the little engine.

The boosted skis really drink up the fuel don't they.
I disagree the old 2 stroke sea doos have major issues with oil injection
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Old 05-08-2011, 12:46 PM   #13
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Originally Posted by inferno94 View Post
The new ones are heavy, some are 1200lbs.
Holy damn. I never really thought about it but I figured they had like gokart engines or something I didnt realize they any sort of real power.
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Old 05-08-2011, 02:16 PM   #14
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I disagree the old 2 stroke sea doos have major issues with oil injection
I've heard similar from others, though having 0 issues myself. Most just run premix and problem solved.

What is really fun is crossing sections of the great lakes, I even saw a documentary of two Canadians making a round trip to Russia from Alaska on a couple of 8 year old, 2 stroke machines.
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Old 05-08-2011, 03:05 PM   #15
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This thread needs more awesome videos of said jet skis.

65mph on a smooth lake is pretty fun. I sometimes wondered what would happen if I were to do an abrupt turn at those speeds. Visions of a rock skipping on water come to mind.
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Old 05-08-2011, 03:20 PM   #16
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Quote:
Originally Posted by inferno94 View Post
The new ones are heavy, some are 1200lbs.
How is that even possible?

Granted, I have little basis for comparison, but a Suzuki Hayabusa (1350cc, 190 HP naturally-aspirated) weighs less than 600 lbs wet. Does one of these things actually contain twice as much awesome as a 'Busa? Or are they just ballasting them with depleted uranium?
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Old 05-08-2011, 03:56 PM   #17
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the heavier they are, the smoother they ride - and water is SIGNIFICANTLY rougher than a heavily potholed road.

That being said, I rock two of these:
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A 1989 and a 1987 kawasaki 650sx - 2 strokers, probably about 60-70hp each. I'm going to guess their weight at probably 200-240lbs each. Have fun and get your *** kicked doing it!!
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Old 05-08-2011, 05:07 PM   #18
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I'd much rather ride a sit down model. Newer ones might be heavy, but they make up for it in power, smoothness and refinement. Plus the really heavy ones are the long ***, 3 and 4 seater models. The smaller ones are still heavy, but not nearly so much.
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Old 05-08-2011, 06:09 PM   #19
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I see the guys riding the "cadillacs" all of the time, big heavy PWCs. Usually the people that can afford to drop 12k on a PWC want something smooth, comfortable, and fast.

My little stand-ups are not smooth, they are not comfortable, and they are not "fast", though fast is a relative term, and they are generally "fast enough" for me; I'm don't go out to cruise lakes with them.

It's really quite entertaining though, to see the guys on the cadillacs rubberneck, slow-down, and even stop altogether in order to watch me play. I think they are jealous because they know that the "fun stuff" that their waverunners can do is limited to this:
o Go straight
o Turn
o Get a couple inches of air if a big enough boat drives by
o Get stuck upside down
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Old 05-08-2011, 06:39 PM   #20
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Originally Posted by fooger03 View Post
the heavier they are, the smoother they ride - and water is SIGNIFICANTLY rougher than a heavily potholed road.
I understand the dynamics involved, I just didn't expect them to be that heavy. I mean, at 1,200 lbs, you are literally one full beer keg short of a first-gen Geo Metro!




Quote:
Originally Posted by fooger03 View Post
I see the guys riding the "cadillacs" all of the time, big heavy PWCs. Usually the people that can afford to drop 12k on a PWC want something smooth, comfortable, and fast.
I get it. It's just that if I were going to spend $12k on a large PWC, I'd buy a small boat.

Seriously- you can get a brand new Searay / Bayliner / etc bowrider in the 17-18' class the for pretty much the same money, complete with engine and trailer. I can't imagine it being significantly less fun than a Cadillac PWC (I've driven a 21' Bayliner, and it's entirely possible to scare the ever-loving **** out of yourself with one even on calm seas) and of course, you have the option to stop in the middle of the lake and tap the aforementioned keg when you're ready to relax.


Quote:
they know that the "fun stuff" that their waverunners can do is limited to this:
(...)
o Get stuck upside down




Sidebar: Did you know that Honda is building a jet airplane and the engines that power it? It's already in certification and flying, with first commercial deliveries set for next year.

http://hondajet.honda.com/default.aspx?bhcp=1

Do want.





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