New engine new top speed - Ls v8 turbo jetski -

[@cazsomething9433]

so glad you guys stuck with it!

[@JetSkiBrothers]

👍🍻

[@Wetlife0069]

Agree

[@AquarianSoulTimeTraveler]

​@@JetSkiBrothersyou should make it stand up on a hydrofoil then you could go 120 or faster.

[@madkidd00000007]

I really think you need to repitch the impeller. That motor is past peak torque, if you can drop it 500-800 RPM it’ll be much happier on the top end

[@huss03]

I'm no expert, but does cavitation happen in an impeller too? I assume that at some point as you say, the impeller becomes the limiting factor.

[@SilvaDreams]

Going to say it likely needs a bigger intake and jet assembly. That engine isn't even being taxed, you could use it to make a bigger boat type then it might get some work.

[@SilvaDreams]

@@huss03 Yup cavitation will happen due to over speeding the impeller.

[@DAT240Z72]

Their 1st mistake was choosing a pushrod engine. There is no need for the torque. They should have went with a Hyabusa V8 or even a rotary engine. They’re just wasting money trying to make the wrong engine do something it can’t.

[@csdstudio78]

​@@DAT240Z72agreed. Just gonna burn up another motor trying to extract more power outside its power band.

[@clasicdemott5986]

How in the world does this channel only have 38k subs? I have left this comment many times. Thank you for making your videos. I almost forgot . You have the best sounding ski. A Japanese seed that sprouted an American Beast.

[@GoldenCroc]

Niche interest, is the truth. Larger channels have more broad appeal and really large ones appeal even to people outside that specific interest as well.

[@suqmadiq68]

Point taken.

[@coloradomountainman8659]

Only has 38k subs as that is how many aholes adore those pieces of shlt. Ban them all!

[@InvaderSS670]

The intercooler will make a big difference. Has a huge effect on supercharged oem machines. That engine breaths a lot more air at triple the displacement.

[@JetSkiBrothers]

Yeah I’m hoping it helps a lot 👍

[@Zionslayer1]

@@JetSkiBrothers What are the intake temps and boost?

[@ausguy4385]

Yeah the water to air ones are small and since in the water... no other cooling required.

[@omargutierrez6622]

Even the stock class skis with stock engine and stock supercharger are running way faster at the hydro drags.

[@Zionslayer1]

@@omargutierrez6622 , he needs Dean to cut that plate, , hull mod, a Supercooler and a Freedom 162. And PLEASE put the Coco tunnel before it sinks again.

[@davidortiz173]

Involving your kids, was awesome brother!

[@thebrain9384]

Thanks, Hulk Hogan!

[@JustinTurnerman]

That things is insane. It's like a hellcat of the water. Big solid and tonnes of power.

[@fullsendmarinedarwin7244]

Sounds so good. Got that awesome V8 rumble without being obnoxiously loud. Sounds refined

[@danielwitham1791]

A turbo quietens exhaust noise massively in all engine applications. Straight piped turbo anything is quieter than straight piped non turbo with same engine, due to the turbine reducing the noise output. This is why non turbo and supercharged engines with high flow or minimal exhaust are so LOUD!

[@smplyizzy]

You video / camera skills are really improving. Like your V8 JetSki.

[@JetSkiBrothers]

Thanks! It's been a learning curve but I'm getting there.

[@foreverendeavors6210]

That ski is getting reliable now.

[@carolforslund1311]

What an awesome place to test your progress on this really clever build! So fun to see it getting better! Thanks for the great update!

[@latunguley]

Not even 5 minutes in to your video here. I could see it on my pixel 7 Pro watching the video sideways. The acceleration is immense. I'm going to watch the rest of the video. I think we're up for some really cool stuff here at the end. Finally got the all aluminum lh6

[@doylecoody1651]

Your a mad man and im here for it .

[@JetSkiBrothers]

🤘🍻

[@camyota]

Man that thing sounds so clean @ id love to hear it in person!

[@piquat1]

Sir, I think you've created a ski I actually like better than a screaming two stroke! That thing is certified bad ass.

[@craigaustin4779]

There is no higher calling than stuffing giant power into things, any things. Keep it up.

[@stevebrough3068]

Welcome back boys.

[@JetSkiBrothers]

🍻 it feels great to be back

[@1BigDaDo]

HELL YA glad to see it back running on the water !

[@adzythepwcblokeinaustralia5467]

I’m very proud of you blokes , you have come such a long way and deserve the recognition and respect from everyone who watches your videos. That V8 is insane, so fast 💨, kind regards Adzy the PWC bloke in Australia 🇦🇺

[@JetSkiBrothers]

Thanks I appreciate that 👍🍻

[@ryandubyah2345]

More than anything else I just can’t get enough of the LS turbo coming from a jet ski, it’s incredible!

[@Lift33d]

WOW the wake it leaves and the sound is insane!

[@CR41G7P]

chin up dude, your gonna hit a ton I just know it, good luck, all praise to the gods of speed

[@JetSkiBrothers]

Thanks 🍻

[@craigaustin4779]

I love 2 strokes but, a big angry 4 stroke at full boil does sound like heaven.

[@spacejamgoliath]

Certified madman. You made that look too easy

[@davejase3399]

Absolute insanity... and I thought my Stage II RXP-X was gnarly!

[@thetruth7633]

What a beast! 30 years ago I owned a Kawasaki 550SX which ran 55mph and that thing was such a cool jetskit to stunt with. But this? Whole different planet power wise. Wow..

[@DessiLu14]

You guys gotta bring this thing to the Hydrodrags in South Florida this year

[@JetSkiBrothers]

I would like to. But I don’t think it’s going to happen this year

[@auriceburrell8148]

As cool as the ski is, it wouldn't be competitive. Great for displaying the work.

[@JackCecil]

With some hull work and prop tuning it could definitely crack 100mph.

[@Captain_Brendan]

I love watching the v8 ski can't wait till you crack the 100mph

[@xylol412]

I’m glad that you have a respectfully quiet exhaust.

[@bryanford1139]

I had an engines teacher back in trade school who told us..."the speed ain't in the engine...it's in the chassis" oh, how right he was 😲

[@K-Effect]

I’m sure a lot of you have seen it but there’s that guy who’s building that JetSki that has that pump gas giant black anodized hemi with lime green headers. He had the engine built at Steve Morris Engines. I don’t know if it’s still over there or not, I been busy and haven’t watch that channel in a few months. This JetSki is insane, I can’t imagine wanting more

[@danielwitham1791]

The engine went in and came straight back out again. They need more mods to the body for it to be easily removed to work on. Otherwise it's going to be a shit show trying to wrench on anything. So Steve finally got his parts all done and the engine was going in, but in the green monster hemi fashion. She was straight back on a stand and now awaiting modifications to the body of the ski for easier working on the motor. I only know this because I happened to watch a very recent SM engines video drop. It's like that things cursed. Hopefully only the engineering and once that's all sorted she just flies with torque of a million rhinos and barely even revving.

[@michaeltaylor8835]

The kid knows his stuff

[@GoldenCroc]

Well done gents, you will get there in the end I am sure! And how far you come so far is nothing to sneeze at either! 😀

[@jeffbaker5038]

That thing is awesome! It seems pretty manageable at the speeds you have been running it.

[@fusion-star]

After studying this video, I have a suggestion that will perhaps increase the speed at the same time you utilize the pressure in the water jet, reduce the diameter of the jet nozzle by 20% it will give higher pressure out of the nozzle more speed, the V8 has the power for that.

[@dsvehaynes6043]

Pump stuffing could be a problem if you over power the water intake.

[@darylpeekay]

Holy smokes, you guys are nuts. I laughed and cried at the same time about how insane this beast is🤙🏻

[@nitrotain]

Great Job, incredible content, so happy you guys push through with this project and kept it going. THE BEST 👍

[@costasgeorgiou5015]

Awwwww shit! Yall still at this thing! That's awesome now I don't have to do it! 😝 0:07

[@JoelArseneaultYouTube]

Heck yes... Excited to watch this... going to the big screen!

[@JetSkiBrothers]

Nice 👍

[@latunguley]

Yeah you guys are totally totally headed in the right direction now. Loving every minute of it! So fast with very little aquatic real estate awesome! 👍

[@TheRange7]

How does the actual jet ski not rip apart from all the G's and HP? This is flippen insane but so cool. Stay safe guys.

[@MrCptnawsm]

I think you will see a fair bit of gain by changing the air filter to something with highr flowrate, and move it so the drive isn't blocking the air running to it. Why not try running double flex hoses up on the shoulders of the driver to get the best possible air inlet :) No matter what you progress with, this project is one of the better ones out there!

[@chadallen5942]

Tighten up your impeller to pump clearance, and drop jet nozzle diameter by 2 to 4 mm. Port the grate more. Just some thoughts. Increase propulsion.

[@zachblazier1423]

You will get it dont give up

[@jayburrough4308]

It's crazy how different you and your brother are.good videos

[@chadro_g1145]

Dude, Summit Racing sells ring grinders for like $35! Just like others have said, I’d take advantage of the torque of the LS, and change the impeller to a very high pitch. It can definitely turn it, and you wouldn’t need to twist it up near as high of RPM. I will say, by far, the baddest sounding ski I have ever heard!

[@kevin9c1]

You'd want to pitch the impeller to let the engine sit at the peak HP RPM right at top speed. If this has a stock cam, they are already past the peak HP RPM....but with a cam and head work these can peak in the high 6000s or even higher. The pushrod/torque part doesn't really matter if you are chasing top speed.

[@zxggwrt]

That thing is WILD!

[@terrynicewonger5434]

Watching off and on and this thing is awesome Guys …

[@molivroman9806]

you guys are geniuses. stick with it, please.

[@randoawesomemix9501]

This makes me want a V8 jet ski. I've never really wanted to own a jet ski and deal with their issues. I'd love to buy a turn key LS Yamaha Jet ski.

[@davidortiz173]

I think the aluminum block was a good choice!

[@RickElliott-o9p]

Looks and sounds amazing. Great job.

[@JetSkiBrothers]

Thanks! I'm happy with how it turned out.

[@skun80]

Try to talk with the florida PWC Dragracers. They may have the answer to improve the speed.. Maybe rideplate, Water intake.. Most probbably jetpump size... They usually cut the rear lip of the hull for increase the underhull air flow for example

[@JetSkiBrothers]

That’s a good idea to get some knowledge from those who know about fast skis

[@skun80]

The actual world record is 142mph.. you are not too far 😁 The record was reached with a Yamaha 1.8 turbo and nitrous with a lot of Hp I guess you already know about that 😊

[@Marksracingengines]

sheeuit I gaped rings with a grinder for years until I could afford a "real" ring grinder lol...no judgement here brother! Love your channel...cool stuff, love it!

[@MidwestMotor]

This is SO friggin cool and sounds amazing!!!!!! 🏁🏁🏁🏁🏁🏁

[@scottg391]

I love my FZS and it goes plenty fast with the Riva stage 3 kit... It just lacks that V-8 sound. When you get the bugs worked out of this one, sign me up, I'll take one.... Good stuff as usual...

[@soulsunderseige4946]

Wow, the ski sounds amazing.

[@eetack]

Might be time to look at the hull on that ski, and see if the factory left any hooks in it. You have plenty of power. I would start looking into the hull and pump for your speed. If it's running too wet, it might be time to look into making the first droop snoot for a yamaha pump. Look at what the river racing jetboats, and drag racing jetboats are doing. Yes, you don't have a mixed flow pump, but many of the same principles can be applied.

[@GoldenCroc]

I suggested something similar a while ago. But I think they (at least back then) would like to keep it to a "stock"-ish pump. Perhaps they have changed their mind.

[@PiDsPagePrototypes]

1:40 - Is that wise? Using a wet sump in a vehicle that is going to experience high g-loading, both from cornering and the impacts of coming off waves and jumping? Is that the air intake above the two exhaust outlets? If so, that's a pretty small surface area to pull enough air through for a turbo V8. There's also a possibility that because of the way the air will end up with a dead spot directly behind your back, that the inlet might be sucking some hot exhaust back in to the engine.

[@GoldenCroc]

Wet sump should be ok, just about all the forces should be directed downwards... Yes, the air intake might be a bit of a concern, I agree. Not sure its a large problem in reality though, but its got potential to rob a bit of power, thats for sure.

[@bsrcat1]

Your maxed out on Hull speed... Make it longer. You don't have to change your deposition or transom. You can have a slice running right down the middle and the hull extensions basically being tapered, C-shaped, skies that the jetski can plain on. Read a little bit about naval engineering and hull speed and you'll understand my description.

[@sc5015]

How fast you pulled away from the other boat at speed was ridiculous.

[@JoelArseneaultYouTube]

Also… awesome job with the video/ telling the story.

[@JetSkiBrothers]

Thanks I appreciate that 👍

[@kimkeam2094]

You’re going great! Only through consistent testing will improvements be achieved and a couple of things are obvious…… it runs well, reliable and now can be benchmarked for performance improvements. Although it may seem slow to you compared to your other high performance skis, but the acceleration is staggering. Can you also consider increasing the pitch of the impeller as well. If it can accelerate quickly, you have a lot of torque in reserve. If you can increase the thrust and only loose a little acceleration the result would be a higher speed. Just thinking the limits you are hitting is not the engine gearbox package.

[@edjovi3677]

love this ch great job !!!

[@stevejohnson8703]

too cool. easy for me to say, cause I didn't build it, but try to enjoy it instead of chasing a number. And if a number is what it's all about, swap that pump for a prop and then triple digits will be easy. I would ride with pride if it was mine, just like it is, awesome

[@JetSkiBrothers]

Thanks, I appreciate that

[@allansnelder3292]

you might need a longer ski like a sea doo fishpro. the ski now wants to keep launching itself out of the water even at top speed! it has so much power that little setup you got there and a aircooler is a must if you want to run at those higher rpm otherwise you will cook your engine

[@JetSkiBrothers]

It does want to get out of the water on the acceleration!

[@joeyperez6993]

A Kawasaki Ultra hull may work. Its a big heavy deep v hull that would keep that hull planted instead of launching.

[@sr2Xvet]

The issue comes from the ring gaps are to tight. when under boost the ring expands an has no were to go but to collapse a ring lane very common on N/A engine that get boosted. Maybe the pump needs more impeller or just a whole new bigger pump!

[@JetSkiBrothers]

Could be but I guess we’re going to figure that out….. the hard way 😂

[@zxggwrt]

I don’t know but I sort of think they might not make a bigger pump at least in this form factor. Or an impeller with as much pitch as this could handle?

[@sr2Xvet]

The ski pump yes may be taped an has no other upgrades BUT Glass work is ezy! A pump can easily be modified into the hull. They got this there on the right track. It sick guys keep killing it!

[@rr4298]

Did you put a straight edge on the back of the hull to see if it has a hook ?

[@Agility-s7q]

I think it's cool enough as is. Just keep it reliable.

[@davessparetime83]

You should put adjustable trim tabs on it

[@JetSkiBrothers]

It’s an interesting idea. I have thought that a lengthened sponson could act as a trim tab. But we’ll see

[@Flyanb]

Water patrol isn’t catching this guy!🤟👍😁

[@P-J-W-777]

Sounds awesome!

[@jakegorman7121]

I'm wondering if you have reached the efficiency limit of your pump.

[@FryChicken]

FINALLY! YOU GUYS DID IT!!! WOOOT!

[@JetSkiBrothers]

👍👌

[@jasont2074]

Insane!! Love it

[@thebrain9384]

Like someone said, impeller pitch or maybe it needs a bigger volume of water passing the impeller (larger diameter). It's definitely not straining, sounds good, looks fast.

[@Thoughtcake508]

i love this thing!!!!

[@christianfritz6333]

I think your issue is propulsion, when you made the 94mph run I could see in the wake a supercavitation. So either you are sucking in a increased amount of air or you are trying to push the water faster then the intake can pull it in.

[@donalddarbonne779]

Single you're limited on RPM, but have tons of torque, now you need more pitch. You need A LOT more pitch to match the power.

[@Marvinfj32]

One wild ride. I can't think one screw up and you get rolled out on the water like dough under a roller. But fun!!!!

[@jasons4745]

Man it sounds sweeet💪

[@One_More_Summer_Garage]

You need a super aggressive twisted impeller.

[@Gmh6477]

Aerodynamics will definitely help gain speed, maybe add a small screen from a sports bike to push air over your body or modify that front cover so it sits open a few inches to push the air over you rather than it hitting you in the chest

[@nocturnalspecialties642]

What about a water/methanol injection setup? Its easy to program with the holley and works pretty good.

[@adriancandelaria531]

Gotta try running e85, also is there any way that the pump/impeller is already at the limit of what it can push out ?

[@JetSkiBrothers]

I’m not sure what the limit of the pump is but I guess we’re trying to figure that out. Also I’m trying to stay away from e85 because it’s a boat application. From what I understand e85 is not great for boats

[@adriancandelaria531]

@@JetSkiBrothers now that I think about it the impeller/pump are probably not the limiting factor considering the pro racers are going +130 now. You think the gear box you have maybe limited? Also how much power you think it’s making seems a bit modest for a turbo ls.

[@GoldenCroc]

@@JetSkiBrothers Hi, why would E85 not be great for boats? The only thing I can think of is that the Ethanol in the E85 like to absorb a lot of water if it sits, thus wreaking havoc with the fuel and fueling system... but is that really how you are running this ski? With the leftover fuel sitting in it between the runs?

[@DoodMang7]

so sick man

[@zrupert7339]

You're probably already thinking this but if you can spin the jet drive faster/regear it,I think you'll hit mph. Seams to have the power but not the right ratio

[@IAMREIKI]

Feels like 120 sitting here ,

[@JetSkiBrothers]

Nice hear that. I’m used to people complaining that it looks slow. So to hear it looks faster than it is, it’s nice for a change 👍

[@creativeirrigationlighting941]

Time for a higher pitch impeller !

[@JoelArseneaultYouTube]

By the way you were talking, I thought you had a catastrophic failure. I think this was a huge success. You have the skills running fairly consistently, and now you can play with setup and “little” things to see what makes a difference. Perhaps I’m missing something (probably) but the rocket like acceleration doesn’t seem ideal for top speed … seems like the pump is holding it back … Thar being said 90+ mph is VERY impressive.

[@JetSkiBrothers]

It did have a catastrophic engine failure on the outgoing engine. But the new aluminum engine has been solid. It can go run low 90’s anytime the water is smooth enough. And I know we’re going to go faster once I figure a few little things out

[@JoelArseneaultYouTube]

@@JetSkiBrothers Oh yes. The previous engine failed. I kinda had that figured out already, haha.... or highly suspected. It was nice to see a video form you, and I have no doubt that it will go faster and be interesting to follow.

[@Dunriteproducts]

You should invest in a drone for filming. Could get so much cooler shots and a decent drone will only run you about a grand and think it would really help the channel especially considering the type of environment your filming. Nice work!

[@CL-ok1gx]

Can't imagine that engine holding up at those rpms without blowing a rod through the block. Just hope you don't get hurt. Cool build

[@Datsun280zeeee]

It’s fine. Basically every recreational boat 19-30ft has a GM engine that Volvo penta or mercruiser slaps their name on to

[@JetSkiBrothers]

It's always a risk but we are trying to keep everything safe.

[@nocturnalspecialties642]

Those rods are actually very strong and live to some really high rpms. Detonation is what will make them unhappy.

[@N4CR]

@@nocturnalspecialties642 it's the top end you worry about at those RPMs on an LS when NA as well. Link bars, chain upgrade, rocker arms have weak bearings from factory. IF cam then do the springs as well.

[@nocturnalspecialties642]

@@N4CR I know. I build them all the time. But only a few really high rpm builds.

[@terrydaubenspeck5976]

Is there a way to increase the impeller speed or make it more aggressive? It doesn't sound like the engine is working hard at all. The only limiting factor here seems to be the impeller has done all it can at that rpm.

[@bubbadoc]

so can you add more gear to speed up impeller? seems like you have more than enough power/torque. or a bigger pump

[@trmpgod9976]

NO SHT. IT NEEDS PROP PITCH AND TWICE THE RPM !!!. 6000 RPM IS 6000 RPM WHETHER IT COMES FROM 250 HP OR 700 HP. THE BEST THING HE COULD OF DONE WAS A BUILT TURBO ? HIGH RPM MOTORCYCLE ENGINE, AND THAT HAS A GEAR BOX AS WELL. THIS BUILD IS SOOO STUPID.

[@purdyboi8078]

@@trmpgod9976 OMG, DUDE...WHY ARE YOU YELLING?? Urine idiot

[@Geto-Dac]

how much power can you add before changing prop profile?

[@SP00LIN92]

It would be super cool to see Calas or BkBuilt help get this beast dialed in!

[@Profabdesigns]

Gotta bring this to Worlds finals in Phoenix AZ nov 1-3, 2024! Use the L99 aluminum block.

[@jdh1047]

You may find you are falling off in power at that high of rpm just because you can’t breathe enough through the engine. Sometimes they work better when you put more load on aka higher pitch prop and get the engine back down to a higher torque rpm. I have no experience with your specific setup (probably nobody has) but in the jetski world I’ve seen skis go faster by lowering rpm with more pitch.

[@Turbogto_guy]

You definitely don’t have enough pitch on the impeller. It’ll make more boost too. Not sure if you have a cam or not, but look into the summit ghost cam. It’ll turn 7000 with that cam and the right springs. You also need to make sure it has a free flowing intake to suck in the massive amount of air it wants.

[@glennllewellyn7369]

Awesome! Well done boys. Can I have it? Australia!

[@kirkgahley6761]

Have you ever considered getting a draggy? 60ft times. 1/8 and 1/4 mile times. Plus top speed. What jet pump is that?