⚡️ Electric Yamaha FX FZ GP ⚡️

[Waterholics]

I know this might piss off a few petrol heads but let's go

So has anyone ever come across an EV motor swap into a traditional hull like an FZR or FX?

Was toying with the idea of taking a Tesla motor and battery or some other EV motor (Suggestions welcome)
that produces 350hp or more and spins atleast 9,000 RPM (Like a current SVHO with a Stage 1).

This is purely for testing purposes and just wanted to see what electric power can do in a Jetski.

I know Taiga has brought out an electric PWC but it seems to be towards the rental / entry market and not the performance.

I am thinking that hole shot is going to be insane if the pump was tuned right and the midrange is gonna pull super hard.

Any suggestions?

P.S. I have a hull for an FZR I am willing to experiment with.

[K447]

The problem is not with the electric motor or the motor controller. Those can fit inside a PWC hull.

Battery weight, kilowatt-hour capacity and physical size is the limiting factor.

Electric drag race cars have impressive performance but the batteries are depleted rapidly.

[Waterholics]

The problem is not with the electric motor or the motor controller. Those can fit inside a PWC hull.

Battery weight, kilowatt-hour capacity and physical size is the limiting factor.

Electric drag race cars have impressive performance but the batteries are depleted rapidly.

This is fine for the build I am going for.

It's not gonna be a cruiser but a course monster.

I'm thinking drag races and even some closed circuit racing.

[nmpeter]

here's some interesting specs and discussion of the model s tesla motor

https://chargedevs.com/newswire/elon-musk-cooling-not-power-to-weight-ratio-is-the-challenge-with-ac-induction-motors/

power to weight is awesome, rpm is going to be an issue, so the reduction gearing is going to be killer expensive

cooling was an issue but a pwc shouldn't have a problem with that

cost of the motor and battery size+weight are going to be things to consider

the battery is going to be the problem in the PWC enviornment I suspect

still hey if you've got the funding, go for it!

[Waterholics]

here's some interesting specs and discussion of the model s tesla motor

https://chargedevs.com/newswire/elon-musk-cooling-not-power-to-weight-ratio-is-the-challenge-with-ac-induction-motors/

power to weight is awesome, rpm is going to be an issue, so the reduction gearing is going to be killer expensive

cooling was an issue but a pwc shouldn't have a problem with that

cost of the motor and battery size+weight are going to be things to consider

the battery is going to be the problem in the PWC enviornment I suspect

still hey if you've got the funding, go for it!

Or we could just spin the prop to 18,000 RPM

So it's either building a reduction gear system or finding a motor that spins around 8-9000 RPM's.

Cooling doesn't seem like a big problem if we were to get the RPM's down to 8000.

[K447]

... a course monster.

I'm thinking drag races and even some closed circuit racing.

How many minutes at wide open do you think you are going to have?

Two?

[nashvegas]

⚡️ Electric Yamaha FX FZ GP ⚡️

I don't know if 18,000 rpm will be an issue. Some of the drag skis spinning 10-11K. The torque of electric motors are intriguing. There are quite a few electric super cars killing their counter part Tesla and nearly all of the gas super cars. See the torque numbers in the article below.

https://electrek.co/2020/05/17/not-ready-until-2025-lol-here-are-10-evs-that-smoke-ferrari-now/

[seabrook]

the whole bottom to a tesla is a battery and weighs 1200 lbs

[nashvegas]

You wouldn't need all of that battery unless you wanted to ride 200-300 miles powering a ski the size of a car along with AC / heat, headlights and a stereo

[nashvegas]

It's just 18650 batteries, not much bigger than a single AA battery, just a bunch of them. My high power flashlights and dive lights run off them. So does my heavy torqued E-bicycle. Think my ebike uses 72 of them.

That 1200lb battery referenced used 7100 of them.


ÔÇ£Tesla has been using 18650 cells manufactured by Panasonic in Asia in the Models S and X cars since 2013.ÔÇØ

https://evannex.com/blogs/news/understanding-teslas-lithium-ion-batteries

[nmpeter]

looks like you're going to need a bigger soldering iron (to assemble the battery pak)

[K447]

You wouldn't need all of that battery ...

A Tesla car cruising on the highway needs about 15 kilowatt-hours per hour.
About four miles traveled per kilowatt-hour consumed from the battery. So about 250 watt-hours per mile.

A PWC needs several times that energy just to be on plane.

At wide open a stock Seadoo 300 is producing circa 230 Kilowatts, continuous. Do that for an hour and you have produced and consumed 230 kilowatt-hours of energy. Top speed of say 80mph (stock engine power, but being generous).
230Kw/80 miles = about 3,000 watts per mile.

About twelve times the energy per mile compared to the car.

The Tesla Model 3 battery is about 77 kilowatt-hours stored energy. Put that battery in the Seadoo 300 hull (and somehow have the entire package weigh the same as a stock Seadoo) and you can go 25 miles at wide open.

But that Model 3 battery pack is (roughly) 85 inches long, 58 inches wide and weighs half a ton.

[LT1GMC]

Electric sounds good but many forget the amount of energy watercraft use moving thru the water. Take a ski boat that weighs 4000 lbs. (older type ski boat) with a 350 engine. That engine may get close to 20 mpg cruising at 60 mph, but the same engine in that boat is lucky to get 3 mpg at 35 mph. Instead of just rolling on a road, boats are pushing water out of the way plus pushing it using the prop or impeller. Watercraft's hp use increases with speed exponentially, while a car uses a good bit getting moving but can drop to 15-20 hp at cruise.

[livefromheaven]

Always wanted to try this too. Keep us updated if you do!

[nashvegas]

I'm more so referencing a killer drag type setup with just enough battery to make a 2-3 second pass in a low weight high torque and horsepower setup.

I wasn't a believer at all in electric technology until other mfgs continued to push EV further like in the link I posted earlier.

What's the new hummer EV supposed to produce like 1000hp and 11,000+ lb foot of torque?? That's what 25x the amount of torque and 5x the horse power of the military H1 diesel hummer? Not to mention the WTF mode 0-60 in 3 seconds rolling on 35's in a big ass truck??

https://youtu.be/MjMhZKmHKGk

HUMMER H1 is powered by a retuned 6.5L, turbo-diesel V-8 engine that for delivers 205 horsepower (152 kw) at 3400 rpm and an impressive 440 lb. -ft. (596 Nm) of torque at 1800 rpm. That's 10 horsepower (7 kw) and 10 lb.