New GP1800 goes 82mph with tune/intake/impeller

Yaj Yak

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hmmm premium is needed though for even the stock one
 

Yaj Yak

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the best part is yamaha marine division got the "keep things light weight" memo and this thing weighs only 760 lbs.

with a supercharged 1.8 liter 4 cylinder inside of it :bowdown:

the 310hp kawasaki, for comparison, weighs 1050.
 

PANDA

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I love those.

Id still like to find a GP1300R. Not many available FS for what I want to pay.
 

VenomousDSG

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Nice, i still need to do a little work to my GP1200R before the start of the season. I want to get to at least mid 70s.
 

Yaj Yak

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Yamaha GP1800 (2017-) 2017 Reviews,performance,compare,price,warranty, specs,Reports,Specifications Layout, video | BoatTEST.com

Overview
If you’ve ever asked yourself what it would be like to have a machine that racers use to win trophies, then bring your checkbook on over to a Yamaha dealer and sign a contract for the GP1800 and find out. This is a WaveRunner with the largest engine Yamaha makes, put into the lightest production performance machine with a race inspired hull. In short, it’s an adrenaline thrill ride that is not for the faint of heart.
However, if you’re an experienced rider, interested in closed-course bouy racing in a high performance rocket, then stop and take a look at this. The GP1800 is built with you as the target audience.


The Power Plant
We’ve always said that there’s more to performance than a bigger engine but Yamaha didn’t get the memo. It took the biggest engine it makes and dropped it into this WaveRunner. So what we have here is the 1812cc supercharged and intercooled, 4-stroke, 4 cylinder, 16-valve Super Vortex High Output engine. That’s the top of the food chain… there is no higher.


The SVHO engine features a high-performance intercooler, increased supercharger air intake capacity and boost, and a modified fuel injection system for increased fuel flow.
Add to that the fact that it’s driving the 160mm, 3-blade, 16.4-degree pitch, stainless steel impeller through an 8-vane high pressure jet pump and you start to get a feel for what we’re talking about.
The Hull
The hull is designed around the most winning watercraft raced today, the Yamaha VXR. It’s a super lightweight hull made with Yamaha’s exclusive NanoXcel2 technology that is sheet molded under extreme pressure to produce, what is according to Yamaha, the strongest and lightest hull and deck available in the industry

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Yamaha GP1800 (2017-) 2017 Reviews,performance,compare,price,warranty, specs,Reports,Specifications Layout, video | BoatTEST.com
 

Knowklew

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Color me unimpressed. 82 is fast and all but my old machine and friends of mine have similar mods going about the same speed 78-80. For this being a new machine i would expect faster.
 

Yaj Yak

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GPS 80 mph ? on what with similar mods?
 

jason05gt

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I missed this thread.

Older GPR ski's take a shit ton of mods to hit these speeds and they are on the ragged edge. Not sure how you can't be impressed with doing 82mph on a PWC with minimal mods.
 

Knowklew

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2009 RXP-X, Riva Stage 2, intake, impeller doing 78 on GPS
 

Yaj Yak

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oh cool how many times have you rebuilt your supercharger so far?
 

Yaj Yak

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so riva's website claims 72mph out of that stage two kit... so maybe they are SEVERELY underrating the gp1800 similarly to what you're reporting.

since they are publishing 82 mph for that, on stage 1, and for yours, they publish 72mph, watch the gp1800's do 90mph once in people's hands with the kits :rofl: :fy:
 

jason05gt

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so riva's website claims 72mph out of that stage two kit... so maybe they are SEVERELY underrating the gp1800 similarly to what you're reporting.

since they are publishing 82 mph for that, on stage 1, and for yours, they publish 72mph, watch the gp1800's do 90mph once in people's hands with the kits :rofl: :fy:
I know in the past, Riva used Radar guns to test top speed. Maybe it's the difference between radar and GPS? My friend who is big in offshore boating once explained to me how the readings can differ on water, but I don't remember the logic behind it.
 

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