575 6.2L Ford ROUSHcharged Raptor vs 556hp Supercharged LSA ?

[DarkSide]

I can say my 24 MXZ with LSA will not hit 40. 2247 prop 15 x 14.25, and she will not hit 40. 39.8 is all she's got. Still 10 MPH faster than i like going anyway. But the hull just isn't built for speed.

[VTXScott]

I've had my LSA powered 247 to 55mph. Acme 2277 prop, 1:25 trans. Still jumps outta the hole with +4k ballast.

[MadMan]

I've had my LSA powered 247 to 55mph. Acme 2277 prop, 1:25 trans. Still jumps outta the hole with +4k ballast.

What was your rpm at 55?

[VTXScott]

What was your rpm at 55?

54-5500ish. I've only had it there once just to see what it would do.

[DarkSide]

Mine jumps out of the hole, and will easily pull you over the board if driver isn't paying attention. But 39.8 is all she's got. As for weight i haven't found its limit. 5k plus PW2 is not an issue.

[IXFE]

Mine jumps out of the hole, and will easily pull you over the board if driver isn't paying attention. But 39.8 is all she's got. As for weight i haven't found its limit. 5k plus PW2 is not an issue.

Hey Dark, do me a favor... next time you are surfing snap a pic of your center screen and post it up.

[DarkSide]

Happily.

[nyryan2001]

I can squeak out 44mph on a near 7000lb boat on a 16x16.

On my second oil change yesterday... Reading the sticker on the coolant reservoirs... It said Max rpm 5200-5400 with 5300rpm preferred. Also, 4200rpm Max sustained cruise.

[DarkSide]

I can squeak out 44mph on a near 7000lb boat on a 16x16.

On my second oil change yesterday... Reading the sticker on the coolant reservoirs... It said Max rpm 5200-5400 with 5300rpm preferred. Also, 4200rpm Max sustained cruise.

At 4200 your not going to cruise too far before your tank is empty...

[kx250frider617]

I keep my ls3 @ 3500 or below when cruising around the lake. With my 1235 prop, that's 26-27 mph. Anything more, and I can see my gas gauge dropping by the minute.

[The Hulk]

VTXScott, on 23 Aug 2015 - 7:09 PM, said:

I've had my LSA powered 247 to 55mph. Acme 2277 prop, 1:25 trans. Still jumps outta the hole with +4k ballast.

Did u upgrade to the 2277 or was that all u ever had.. debating on getting that put in my 23lsv should help with surf and top end as well with higher diameter and higher pitch. Just curious if u had something other before that and the difference. Going to buy another prop and deciding on 15x15.75 or 15 x16 or 15x17 with my LSA

[VTXScott]

The boat was originally equipped with a 1589. After weighting it heavily for surfing and experiencing a lot of cavitation I wanted something that would take advantage of the LSA's torque so i ordered the 2277. It has been perfect for my application. Can surf with around 4k ballast @ 12.6mph and only be reving 24-2500rpm and I can cruise down river to the spot at 35mph @ 3500rpm.

[NorrisMike]

The boat was originally equipped with a 1589. After weighting it heavily for surfing and experiencing a lot of cavitation I wanted something that would take advantage of the LSA's torque so i ordered the 2277. It has been perfect for my application. Can surf with around 4k ballast @ 12.6mph and only be reving 24-2500rpm and I can cruise down river to the spot at 35mph @ 3500rpm.

Dude!! Those rpm's are amazing. Wow.

[DarkSide]

VTX,

That is AWESOME, i want to try 2277 or comperable, i would like to get sub 3000 for surfing. I have 1.5:1 tranny so i will spin a bit higher than you inherently.

Are you listed or gated?

[VTXScott]

Listed

[The Hulk]

1:25 trans? What year? I think my 2013 has a 1:48 so if your 1:25 still has that power I'm wondering if I should increase pitch a bit to 16 or 17 since I can only go 15" diameter. Thoughts?

[IXFE]

Why do I keep coming back to this thread?

Oh yeah... it's cuz I'm jealous of you guys with the big horsepower.

[oldjeep]

Local dealer just posted a picture of their new lsv 25 with the 575 motor. Almost entirely black hull.

Edited August 25, 2015 by oldjeep

[VTXScott]

1:25 trans? What year? I think my 2013 has a 1:48 so if your 1:25 still has that power I'm wondering if I should increase pitch a bit to 16 or 17 since I can only go 15" diameter. Thoughts?

Yes, it's a 1:25 trans. 2012. I would think you'd be fine with a 15 x 15.75 or 15 x 16 but I hate to recommend you anything because I am not an expert on props or trans ratios and there are more than a few variables to consider(SG vs listed, overall weight, elevation...). I do know that with the 2277, 1:25 trans and +/- 4k ballast the LSA has power/torque to spare on the bottom end. On the top end I'm running out of power a few hundred rpm before the limiter.

[The Hulk]

So they switched from a 1.25 to 1.48 trans from 2012 to 2013? Dang if you have power to spare at the bottom end still I'm just curious if I should go slightly higher pitch but then again at the slow surf speeds that may or may not be good after some point. Somebody needs to come out with a line of test props to rent test and buy! Do u use wedge or just list ?as the wedge makes a huge difference for example if I'm all the way down I could be at 2400 to 2500 but one or two clicks up adds a few hundred rpms and about three clicks up puts me over 3000. That's hit or miss a click based on placement of people in the boat. But on that second or third click the wedge becomes pure drag

Edited August 26, 2015 by The Hulk

[The Hulk]

If you're not maxing out at wot and you have a little to spare at the low end you're probably right where you want to be for all around performance if I had to guess. With my tranny being 1.48 I'd have a bit more torque than u but less rpms. Obviously a 16" prop would be sweet but not possible. Since I should be technically slower rpms at the prop with the 1.48 with more torque . Than u with the 1.25 .that's why I'm quessung I should compensate with a bit more pitch around possible even up to a 15x17 as nyryan has advised in the past a 15 x16 or 15 x17. OJ recommends a 15 x16 but your post now makes me question a 15x17 since I'm lower prop rpms with more torque.

[DarkSide]

Hulk you and i are in the same situation. I am going back and forth between 16 and 17 pitch. I know nyryan is running 16x16 in his G. With us limited to 15" diameter i am thinking we might be able to get away with 17" pitch.

If i understand correctly,and i may not. The 1.5:1 tranny would produce even more torque than the 1:25:1 on the low end. But produce less top end. Example 1.25:1 tranny would spin prop 4000 RPM @ 5000 RPM and 1.5:1 would only spin prop 3333 RPM @ 5000 RPM. If these assumptions are correct, we should have room to go 17" pitch. Based on VTX having 1.25:1 AND using 15 x 15.75

I agree would love a rental or trial, at $600 a pop trial and error gets expensive

[VTXScott]

So they switched from a 1.25 to 1.48 trans from 2012 to 2013? Dang if you have power to spare at the bottom end still I'm just curious if I should go slightly higher pitch but then again at the slow surf speeds that may or may not be good after some point. Somebody needs to come out with a line of test props to rent test and buy! Do u use wedge or just list ?as the wedge makes a huge difference for example if I'm all the way down I could be at 2400 to 2500 but one or two clicks up adds a few hundred rpms and about three clicks up puts me over 3000. That's hit or miss a click based on placement of people in the boat. But on that second or third click the wedge becomes pure drag

I run with the wedge all the way down. Maybe one click up if I'm running with a current. I've only been in a couple SG boats but I think even with the LSA I'd be surprised if you can get your surf rpm under 3000.(that's assuming your running 5-6k ballast and around 12mph with wedge)

Like I've said I'm no expert, but I feel that going to a 15 x 17 is somewhat drastic but if you guys try it I'd definitely like to hear your results.

[The Hulk]

I won't be back to the lake for a while can anybody confirm there is a 1.48 in the 2013 23 LSV? With an LSA? Or did the LSAs in 2013 still have a 1.25 like 2012?

[DarkSide]

Wedge is the RPM killer for sure. It also appears as people who list surf faster than gated. I could be wrong, i am at 11.3 normally. The amount of wedge can have a HUGE difference in RPM even at that speed. 2 clicks up front bottom, 3100~3300, 2 clicks from MAX and 3600~3800