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cashito

2015 23LSV w/ 555hp: Top Speed?

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cashito

Curious what others with the 555hp indmar and 23lsv are getting for top speed?

I am ~46mph with diamond hull regardless of 1-6 people.

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Kalamazoo

I'd imagine prop matters quite a bit...

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jb 156

These boats really aren't built for speed more for moving massive amounts of weight / wake through the water. But like kalamazoo stated you can reprop to get more top end speed, this will in effect hurt your hole shot. Also hull resistance (ie friction) has some to do with top end speed as well. As for top speed on my VLX 1235 prop 350 motor I top out at 42mph but rarely see it.

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teamerickson

I bet if you put a 381 on it you might reach 60. :)

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BigE

It'd take a half hour to hit it though.

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mattpoland

wrong question:-). how many thousand pounds of ballast can you push 11mph with that engine? And post of pic of the monster surf wake!

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tjklein

Depends on prop. I've done between 51 and 47mph. (1589 and 2247) It gets there fast, the motor just runs out of RPMs.

As others have said, it's about pushing weight which it does almost effortlessly unless you have very little bow weight.

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DarkSide

I have the 555 in a 2015 24 MXZ. 39.8 is all she's got, with 2247. (15 x 14.25 .150) These boats are John Deere disguised as a Ferrari. I have no idea how much weight it will push, i know 5K plus 6 "big" adults, and a couple hundred pounds of gear, is not even making out break a sweat, 11.3 instantly and effortlessly. Even with that weight it will pull you over your board if driver isn't careful.

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catalac

Curious what others with the 555hp indmar and 23lsv are getting for top speed?

I am ~46mph with diamond hull regardless of 1-6 people.

What prop do you have, elevation and rpm when running wo.

Ps There is a thread in here where a guy has the lsa in a 2011 lsv got 51mph with 14.5x16 at 5500 rpm and 52mph with a 14.5 x17.75 only got 1 mph more rpm dropped to 5100rpm wo, I think user name was danno thread is a good read.

Edited by catalac

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The Hulk

2013 23lsv around 52-54mph 52 all day long but light on gas and ppl and no wind early in the morn and me only 54 with a 1235 prop (14.5x14.25)

granted a 2014-2015 boat is significantly heavier deeper boat "above rub rail" so not sure how the weight affects top speed but the prop will surely. many discussions on here with this.

i will be getting a 15x17 prop and expect to lower surf rpms by about 300rpms and gain about 4-5mph top end with stock LSA on a 2013 LSV

if you want another 5mph then you need to do a lingenfelter pulley upgrade and a street tune, which will raise your max RPMs along with give you an extra 74hp and a whopping 79 ft lbs more torque up to 630hp / 630 ft lbs. Cost $600 and you need someone who can street tune... the power isnt really whats needed other than the RPM increase to spin the prop faster to an extent.

going slightly higher pitch on the prop will make a difference but my guess is anything after a 15x17.5 or 15x18 then it will start negatively affecting the bottom end with a stock LSA, (we have learned on here than older Malibu with a LSA and 1.25:1 tranny spun a 15x16 without issues and was about just right, so with a 1.48:1 gear box (more torque lower prop rpms) a slight increase in pitch is desired so something along the 15x17 , 15x17.5 or 15x18 range. Also we learned a MasterCraft with the big boy NA engine comes equipped with a 15x17.5 and i think with the 1.48:1 if i recall and they said it was great. i was going to order a 15x16 but feel with the 1.48:1 i should go with a 15x17... For surfing we would all love to go 16x16 but not enough haul clearance on a bu. Nyryan is throwing a 16x16 on a G23 and says its great.

if you want to add some top end go with the lingenfelter pulley upgrade! haha... i do belive you could spin a 15x18 or 15x19 easily and knock another 100-150rpms off the bottom and increase top end roughly 10-12 mph over the stock LSA with 14.5x14.25 or 5mph more than stock LSA with a 15x17...rough estimates. The pulley upgrade is nice as it gains more power at lower rpms, but also is tuned for higher rpm max as well. Once warranty is up i'm going for it baby!! even if for no other reason than bragging rights of 630hp... you need some device to connect to a laptop and someone who knows how to tune the O2/fuel mixture etc.. I found someone =) cant wait, but will be another year haha. and will probably be old news since everyone could care less since the LSA is out of commission for new boats moving into the future.

Edited by The Hulk

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cashito

Great info here! I think my prop is the "Standard 15 x 15.75 - 2277". Do you think a different prop would give me 50mph?

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DarkSide

Possibly, if you go up to same area hulk and i are considering, a 15x17.75 (acme 2401) then possibly, should be close, but 50 from a wakeboat is asking a lot

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The Hulk

rough calcs you would need to go with a 15x17, 15x17.5 or 15x18 but i fell you will be close with 17" pitch

what are your RPM's then its easier to calculate, say you reach 5400rpms

15x15.75 prop should in theory give you 54mph 'thrust" granted you cant hit 54mph because some of that force is downward nor horizontal so i'd say your about right at 46-47mph

15x17 prop should in theory give you 58-59mph thrust, so roughly 5mph thrust more than what you have but how much of that equates to fwd motion and prop/shaft angle i dont know, but i think you would pick up at a minimum half the difference and assuming rmps remain same with both props you should get 2-3 mph more is my guess

15x18 prop should give you about 62mph thrust. so perhaps another 2-3 mph fwd speed more yet which should get a solid 50-53mph is my guss if rpms can hold the same...big question there.

it would be so fun to try a 15x17 vs 15x18 but to be safe i'll be ordering a 15x17 but my guess is she'll handle the 15x18 i just wonder where the line gets crossed, i mean the MC has a 15x17.5 so it makes me wonder honestly if a 15x18 might be the ticket ahhhh decisions and $$$$$ and the unknown...

Edited by The Hulk

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The Hulk

Possibly, if you go up to same area hulk and i are considering, a 15x17.75 (acme 2401) then possibly, should be close, but 50 from a wakeboat is asking a lot

ahh decisions decisions 15x17, 15x17.5 , 15x 17.75, 15x18

now i'm wondering more and more! ahhh

i wish we could figure the calc based on nyryans 16x16. physics tells me that a slight decrease in diameter should result in much bigger pitch to equal same forces. the larger the diameter the bigger resistance leverage point and gets exponentially harder for the engine to turn that prop as the water has a bigger leverage point from the center of the shaft/prop.

i wish i could find some math of the force difference between diameter and pitch. if the 16x16 is in theory perfect according to the master than my guess is we may need to consider the 15x17.75 or 15x18. were stuck with 15" diameter so a few pitches up should be at a minimum the same or still less than a 16x16..

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DarkSide

Unfortunately acme goes 15.75 to 17.75 there is no 15" middle ground...

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catalac

Great info here! I think my prop is the "Standard 15 x 15.75 - 2277". Do you think a different prop would give me 50mph?

I'm surprised you are only 46 out of that prop / power combo, as I'm sure you are too. Maybe these new hull just won't pull the mph the last gen did.

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The Hulk

is tranny a 1.72:1 or 1.48:1 ?

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saidainc

I want my boat to get as much speed in the water as I do when I tow it on my trailer, 92mph.

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cashito

I was surprised too, that said the fact that it hits that speed regardless of my passengers probably means there is meat left on the bone.

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The Hulk

Unfortunately acme goes 15.75 to 17.75 there is no 15" middle ground...

I think OJ will cut you whatever you want.

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ahopkinsVTX

My curiosity is getting the best of me. Why do you care about your top end speed? I totally get it if it is just for S's&G's...

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saidainc

The reason I want my Malibu to go fast is the same reason you want your kid to be able to beat up the 5'6" 160lbs 30% body fat playground bully whose been held back 2 grades and runs a lunch money racket across backs of the entire middle school.

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minnmarker

My 9 foot Yamaha GP1300R's will go 72 mph (in less than 10 seconds!) - but they won't pull anything or seat more than 2 people - and you'll get wet.

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JoeA

2013 23lsv around 52-54mph 52 all day long but light on gas and ppl and no wind early in the morn and me only 54 with a 1235 prop (14.5x14.25)

granted a 2014-2015 boat is significantly heavier deeper boat "above rub rail" so not sure how the weight affects top speed but the prop will surely. many discussions on here with this.

i will be getting a 15x17 prop and expect to lower surf rpms by about 300rpms and gain about 4-5mph top end with stock LSA on a 2013 LSV

if you want another 5mph then you need to do a lingenfelter pulley upgrade and a street tune, which will raise your max RPMs along with give you an extra 74hp and a whopping 79 ft lbs more torque up to 630hp / 630 ft lbs. Cost $600 and you need someone who can street tune... the power isnt really whats needed other than the RPM increase to spin the prop faster to an extent.

going slightly higher pitch on the prop will make a difference but my guess is anything after a 15x17.5 or 15x18 then it will start negatively affecting the bottom end with a stock LSA, (we have learned on here than older Malibu with a LSA and 1.25:1 tranny spun a 15x16 without issues and was about just right, so with a 1.48:1 gear box (more torque lower prop rpms) a slight increase in pitch is desired so something along the 15x17 , 15x17.5 or 15x18 range. Also we learned a MasterCraft with the big boy NA engine comes equipped with a 15x17.5 and i think with the 1.48:1 if i recall and they said it was great. i was going to order a 15x16 but feel with the 1.48:1 i should go with a 15x17... For surfing we would all love to go 16x16 but not enough haul clearance on a bu. Nyryan is throwing a 16x16 on a G23 and says its great.

if you want to add some top end go with the lingenfelter pulley upgrade! haha... i do belive you could spin a 15x18 or 15x19 easily and knock another 100-150rpms off the bottom and increase top end roughly 10-12 mph over the stock LSA with 14.5x14.25 or 5mph more than stock LSA with a 15x17...rough estimates. The pulley upgrade is nice as it gains more power at lower rpms, but also is tuned for higher rpm max as well. Once warranty is up i'm going for it baby!! even if for no other reason than bragging rights of 630hp... you need some device to connect to a laptop and someone who knows how to tune the O2/fuel mixture etc.. I found someone =) cant wait, but will be another year haha. and will probably be old news since everyone could care less since the LSA is out of commission for new boats moving into the future.

Proceed cautiously on going with the high pitch prop. It may not perform the way you are thinking it will.

I ran a 16 x 15.5 prop on my G23 550 and while I did save gas and reduce RPMs I missed all of the low end hole shot. I also experienced cavitation too so you'll want to take off slower than normal. Maybe I just love power but I ended up going back to the stock prop which is a 15 x 14.25 if I recall correctly.

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cashito

Its more curiosity to see if the boat is hitting the rev limiter or running out of steam. Maybe I'm crazy but it seems to run 46mph from 3/4 throttle to full throttle.

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