What does it take to go 80mph???

[JordanDangerfield]

Two people, cooler, full tanks and I see 68mph with 600ish HP in my 20.5’ Advantage.

 

[BONER]

^^^Cool boat Man.

If you jumped up to 800hp, what kind of work would have to be done to the Jet so it would live?

 

[BONER]

BUMP

 

[Jonas Grumby]

Hypothetical............

Lets say I have a 21-22' open bow jet boat. I'd like it to do around 80mph. My questions are, how much work needs to be done to the pump, how much power is needed, and would there be a huge speed difference between loaded and empty?

Thanks.

Drop it out of an airplane

 

[DrunkenSailor]

This wouldn't be a bad place to start: https://www.advantageboats.com/inve...entoryinventoryinventoryinventory20-5-classic

I know its not an open bow but this probably gets you pretty damn close to your number.

This one will take $$$ to get there but is a decent place to start and is what you want: http://www.boattrader.com/listing/1996-advantage-boats-21-sr-br-102274494?refSource=standard listing

Theres this one: https://imperial.craigslist.org/boa/d/advantage-21-ft-classic/6576214964.html

Or this one: https://mohave.craigslist.org/boa/d/1988-advantage-jet/6551804589.html

 

[DrunkenSailor]

This one would need a motor swap might be a good ride: http://www.boattrader.com/listing/1999-commander-boats-conquest-103246303?refSource=standard+listing
Motor swap but looks clean: http://www.boattrader.com/listing/1987-carrera-boats-20-eagle-103294568/?refSource=enhanced listing

But I don't think your hitting 80 in either of these.

Shockwave is doing jets on their 21 skier and ls and could probably get you there: http://www.shockwaveboats.com/21_ls_walk.php

 

[DrunkenSailor]

Shockwave will also do a jet on their 22 tunnel deck boat... This might be your answer

http://www.shockwaveboats.com/22_deck.php

 

[77charger]

Lmao. They aren't that hard to drive and it really doesn't take tons of horsepower to make a "Good" 18' jet haul ass.
My last boat was a 19' place craft with a 496ci Chevy and it ran 110, didn't think that was too bad for a mud sucker.

Good power and chris at b1 or jack at mpd for the pump and we know what they will do.

 

[BajaMike]

Hypothetical............

Lets say I have a 21-22' open bow jet boat. I'd like it to do around 80mph. My questions are, how much work needs to be done to the pump, how much power is needed, and would there be a huge speed difference between loaded and empty?

Thanks.

Why do you want to go 80 mph?

 

[BONER]

Why do you want to go 80 mph?

Because I'm a Speed Junkie. Why wouldn't I want to go 80mph? What's the point of having a loud ass Big Block Boat if it's slow?

 

[BONER]

Shockwave will also do a jet on their 22 tunnel deck boat... This might be your answer

http://www.shockwaveboats.com/22_deck.php

Out of my initial price range.

 

[DrunkenSailor]

I would look for a small deck boat to get to 80 while still being somewhat efficient. Shockwave, Ultra, Placecraft, Canyon Silhouette, Domin8ter Tahiti Offshore, etc....

This is an old ad but this is exactly what I would be looking for if I were you: https://boats-from-usa.com/not-specified/canyon-silhouette-55836 Guys number is in the listing. You never know he may still have it...

Here's another one probably old: http://www.powerboatlistings.com/view/19572

Then there is this: https://www.ebay.com/itm/2002-Ultra...ash=item213d98d338:g:DEMAAOSw-OFa3NPO&vxp=mtr

And this: http://www.boattrader.com/listing/1991-ultra-boats-19lx-103289021?refSource=standard listing

Blower gets you to low 70's?: https://mohave.craigslist.org/boa/d/2006-calibermagnum-jet-boat/6571168915.html

No motor project: https://inlandempire.craigslist.org/boa/d/freecommander-open-bow-jet/6558204259.html

Cool Cole just add blower?: https://sacramento.craigslist.org/boa/d/1991-cole-boats-22-ft/6567793684.html

Motor swap: https://phoenix.craigslist.org/evl/boa/d/89-caribbean-jet-boat/6578532822.html

Just add blower?: https://albuquerque.craigslist.org/boa/d/1987-miller-bowrider-jet-boat/6558593490.html

 

[Rogers Hopeful]

Cool Cole just add blower?: https://sacramento.craigslist.org/boa/d/1991-cole-boats-22-ft/6567793684.html

Why are the Cole's so much money? 17 year old boat for almost $30,000. I found another Cole jet that was a 1995 asking $50,000

 

[DrunkenSailor]

Why are the Cole's so much money? 17 year old boat for almost $30,000. I found another Cole jet that was a 1995 asking $50,000

The Cole's have a cult following. They really are a great hull. Faster than most with the same power and you can put some real power to them. The rigging was usually top notch as well for the time. The 250 had great lines. Domin8ter is still building the 250 world class.

 

[DrunkenSailor]

There are a ton of Cole owners on here who can probably chime in here.

 

[was thatguy]

Miller runs over 80 MPH with a SS “A”.
About 5600 RPM. Just over 600 HP.
It’s not a 21’ open bow though.
It will be a challenge to make that happen.

 

[BONER]

There are a ton of Cole owners on here who can probably chime in here.

I wish they would...

 

[Gugs]

21 hallett open bow. 565 dart with big solid roller, very worked over JG with aggressor bowl, stainless impeller with inducer. it gets the job done.

might part with over winter for cash flow for a business opportunity.

 

[BONER]

^^^I like that thing. How fast does it go?

Also, if Winter time comes and you're looking to part with it, let's talk.

 

[guest hs]

LO

View attachment 621392
9.62 at 107 847hp 18' advantage with a Berkely

LOVE THIS BOAT!

 

[87tahiti]

$1000. Per ft. Up to 21' or pay 30k on the used side. And that's a gamble. IMO

 

[Dalton]

21 hallett open bow. 565 dart with big solid roller, very worked over JG with aggressor bowl, stainless impeller with inducer. it gets the job done.

might part with over winter for cash flow for a business opportunity. View attachment 678907 View attachment 678907 View attachment 678909

how do you like those headers? how loud is it?

 

[ibdagimp]

My 26' Hawaiian ran 58-62 with bimini down. 550 hp iron head 460 ford. Dropped a valve now have a reman 460 with smogger heads but built short block. Roughly 400 hp only runs 47 with bimini down now. So 150 hp made 10 mph difference with the same pump. I figure with a new impeller big port heads and cam change, i could push to the 70's down river. But because its a Ford it will cost $5k for 100 HP

Sent from my SM-G965U using Tapatalk

 

[BajaMike]

Open bow? I don’t want to ride in the open bow of a 20’ jet boat going 80 mph.......no way passengers are going to enjoy that.

 

[BONER]

Open bow? I don’t want to ride in the open bow of a 20’ jet boat going 80 mph.......no way passengers are going to enjoy that.

I wouldn't either. But I wouldn't be going 80 with more than one passenger.

Kind of old Thread, but pre requisites have changed. I need 100mph. Which I think is pretty much gonna eliminate any Jet option.

 

[brgrcru]

I wouldn't either. But I wouldn't be going 80 with more than one passenger.

Kind of old Thread, but pre requisites have changed. I need 100mph. Which I think is pretty much gonna eliminate any Jet option.

A 19' Cp jet with about 700+ hp . Will get you to 100 mph .

 

[BONER]

A 19' Cp jet with about 700+ hp . Will get you to 100 mph .

Yep, thanks.

Through my own research the past year or 2, it's not that difficult to find a setup that tickles 100mph, let alone 80. Not sure why the general concensus is that it's damn near impossible.

Getting back to the CP, seems to be a fast Hull with alot of hidden benefits if you have a good Hull Guy.

 

[brgrcru]

Bill Scotten California performance
There are a few others building 19' . The Rouse mold already has the bottom straightened and done.
These two would be on the top of my list.
You could even get a 19' with an open bow. I know of one that , will run into the 108/110mph .plus pulls tubes and skiers.

 

[mash on it]

Bill Scotten California performance
There are a few others building 19' . The Rouse mold already has the bottom straightened and done.
These two would be on the top of my list.
You could even get a 19' with an open bow. I know of one that , will run into the 108/110mph .plus pulls tubes and skiers.

Was it Ford powered?

Dan'l

 

[brgrcru]

Was it Ford powered?

Dan'l

yep, with through the transom exhaust . can you imagine, a open bow jet boat, hitting close to 110, full river lay up and Ford powered . what has world come too.

 

[wzuber]

yep, with through the transom exhaust . can you imagine, a open bow jet boat, hitting close to 110, full river lay up and Ford powered . what has world come too.

I heard it picked up 8 mph when he switched from a framm oil filter.

 

[mash on it]

yep, with through the transom exhaust . can you imagine, a open bow jet boat, hitting close to 110, full river lay up and Ford powered . what has world come too.

My open bow jet bote did exactly half that. SBC powered Saguaro.

Dan'l

 

[BONER]

Every once in awhile you see a 23 or 24ft Jet pop up for sale. Different Ball Game then? Still think 100 would be achievable?

 

[wzuber]

Every once in awhile you see a 23 or 24ft Jet pop up for sale. Different Ball Game then? Still think 100 would be achievable?

While it's likely possible, typically the h.p to weight and hull design efficiency ratio is well beyond anything reasonable except for F.U.$$$ basically.
But you can be the trendsetter if you like.

 

[BONER]

While it's likely possible, typically the h.p to weight and hull design efficiency ratio is well beyond anything reasonable except for F.U.$$$ basically.
But you can be the trendsetter if you like.

So you're talking like a Merc 1350?

 

[Blackmagic94]

Well boner and I have talked about this a lot but my Carrera 18 with a 496 tunnel ram and shitty stock panther did 60.8 mph and might have had a mph or two left as that was like 5-8 seconds at WoT at needles



Tomorrow I take the JbP drive out and see how it works. Then later this month the 6-71 gets installed at 2.75-3 psi initially.

 

[wzuber]

So you're talking like a Merc 1350?

I was referring to a big boat with a jet pump and basically f.u. money in a engine and a perfect hull bottom, intake machining with hardware, installation and ideal water conditions to be clear. In other words it's a significant challenge. It could be a fun challenge tho....a fun way to use up a big ol' pile o cash just because you can. When ya gunna start? haha

 

[BONER]

When ya gunna start? haha

Lol, never if I keep having Kids!

 

[J 2]

This will do it

https://www.boattrader.com/listing/2008-shockwave-21'-skier-103545778/?refSource=standard+listing

 

[wzuber]

This will do it

https://www.boattrader.com/listing/2008-shockwave-21'-skier-103545778/?refSource=standard+listing

lol...nice looking boat..yours?

 

[J 2]

lol...nice looking boat..yours?

Nope, thought about it. Don't feel it's worth the $65k it'll cost after taxes & such. Although I do enjoy having a hidden engine like that, nothing like turning heads when you hammer down, the boat rises and you're gone.

 

[BONER]

Nope, thought about it. Don't feel it's worth the $65k it'll cost after taxes & such. Although I do enjoy having a hidden engine like that, nothing like turning heads when you hammer down, the boat rises and you're gone.

I can think of a MILLION reasons why Jet Botay's are cool as shit. The one you mentioned is definitely a key one.

 

[Blackmagic94]

curious to see what the 6-71 does first time out. Current best is 65 mph with the Na motor and new jet

 

[J 2]

I'm curios about what you're doing. This is a old thread, but a good one for those that like jet drives like myself. I see Carrera 18 above, but Carrera 19 in signature. Did you swap the 496 for a 468? Panther jet, yuk, did you install a JBP Berkeley jet? Are you really adding a 6-71 with only 3 psi? 5 psi might get you 10 mph. I've experimented with boost using a Procharger, started with 5 psi then 7 psi now 9 psi seems to be the sweet spot. 13 psi didn't run right and never went any further, maybe down the road. This was with a Rogers 18' Bonneville that peaked at 92 mph, stock pump position with internals done well. That hull is long gone.

 

[Carlson-jet]

curious to see what the 6-71 does first time out. Current best is 65 mph with the Na motor and new jet

74-6 with you and light fuel. 72 with a friend and full of fuel.

 

[Blackmagic94]

74-6 with you and light fuel. 72 with a friend and full of fuel.

Id be happy with that to be honest. I’m gonna run it at 3 psi and tune it then move it up to 5-6 if it will handle it on the octane.

 

[Blackmagic94]

I'm curios about what you're doing. This is a old thread, but a good one for those that like jet drives like myself. I see Carrera 18 above, but Carrera 19 in signature. Did you swap the 496 for a 468? Panther jet, yuk, did you install a JBP Berkeley jet? Are you really adding a 6-71 with only 3 psi? 5 psi might get you 10 mph. I've experimented with boost using a Procharger, started with 5 psi then 7 psi now 9 psi seems to be the sweet spot. 13 psi didn't run right and never went any further, maybe down the road. This was with a Rogers 18' Bonneville that peaked at 92 mph, stock pump position with internals done well. That hull is long gone.

It’s toms hybrid drive in place of the panther now picked up 5 mph with zero tweaks to the impeller.

once the blower is on and lake tested with data he is going to send me a different stainless impeller in place of the alum unit currently

 

[Trucksrdumb]

So I’m the middle of purchasing a 23’ Tahiti deck with a jet. I’m looking for 100mph out of it. It’s costs money for sure. The pump is set back, straight snoot, stainless impeller, inducer ride plate shoe custom loader. Will have a ratchet and calgo steering. Blown 555 Chevy. So we shall see.
I have heard of a older place craft 22 deck that runs 1300hp and is seeing 112-113. I talked to a guy yesterday that stated his motor should make around 1k ( in dynoed) and he sees 92-93. My motor will make more power then that

 

[n2otoofast4u]

I can’t help you, but I’m all ears on a 100mph deck jet.

 

[Trucksrdumb]

I can’t help you, but I’m all ears on a 100mph deck jet.

Sorry. Wasn’t looking for advice was stating my recipe for the sake of the thread. The gentleman I spoke with that runs in the low 90’s stated that his motor made 800 and then he added a chiller and gave it some more pulley and thought that the motor should be making 1k. I’m shooting for 1100 out of my motor but will likely end up around 1030-1050 for the first tune, see how she does and go from there. It’s a pump gas motor