Solas Dual Impeller + Tunnel Seal

[dailyderbi]

Finally got my Solas dual impeller on and sealed up the intake tunnel on my 195S.

A bit of background here. I live south of SLC, Utah and the two local reservoirs I boat at are 5,500 ft (Deer Creek) and 7,500 ft (Strawberry). I also make at least three trips a year down to Lake Powell, which is about 3,650 ft.

Cavitation on the stock impreller at these elevations was really terrible, especially when towing anything. So after quite a bit of research, I've done three things:

1. Installed a Solas Concord dual impeller. There's a lot of talk about these but nothing around the actual results. Once I get it on the water, I'll update this thread and let you know. In theory, these dual impellers are suppose to eliminate cavitation, plus Impros did a customer pitch for 5,000 ft elevation (happy medium between local destinations and Lake Powell). I don't care about top speed, just power for wakesurfing and tubing.
2. Got a REVA filter to replace the stock one. I was shocked at how little surface area the stock filter had compared to the full open RIVA/K&N one. Especially for being a supercharged motor, I would have imagined as much clean air intake as possible would be best. I did install this before my last outing and can tell a very big difference at higher elevations. The punch on the low-end RPMs is much more pronounced and quick.
3. Sealed up my intake tunnel (not the most beautiful of jobs). Interestingly, the dual impeller blocks some of the back areas that I had intended to seal (and probably more high-impact to reducing cavitation), but I'll have to do it the next time I pull the pump. Definitely makes for an interesting photo to see the impeller sticking out twice as far as the stock.

Next time I take her out (will be a couple of weeks), I'll follow up and let you know how all of this translates into higher elevation cavitation.

 

[XLR8ED]

Very interested to hear the results of your water test, may I ask the part number of the Solas?

Thanks

 

[Ribs77]

I'm at sea level, but, like you, I care a lot more about low-end punch than top speed.

Do you think the air filter alone would make a difference at sea level?

 

[dailyderbi]

I'm at sea level, but, like you, I care a lot more about low-end punch than top speed.

Do you think the air filter alone would make a difference at sea level?

Yes, I do! Take a look at the difference between the two and you can see just how much more intake space there is:
- RIVA: https://amzn.to/4djWJVb
- Stock: Amazon.com

It's also not the most expensive upgrade all things considered, so even if it doesn't totally change your boat, it's worth the price for the incremental performance upgrade.

 

[dailyderbi]

Very interested to hear the results of your water test, may I ask the part number of the Solas?

Thanks

Yup, it is YV-TP JB for 2020+ engines (as far as I can tell) and YSTP-JB for anything 2019 and older.

I got it on Impros here: Solas YV-TP Jet Boat Twin Impeller (SKU: YV-TP JB) – Impros

 

[XLR8ED]

Thanks!

 

[Scuba_ref]

Following, looking forward to your updates after getting it on the water!

 

[anmut]

Post those results!

 

[dailyderbi]

Post those results!

Definitely will, it'll be another week and a half before I plan to take it out though.

 

[anmut]

Ping on this post - how are the twins working out??

 

[dailyderbi]

Ping on this post - how are the twins working out??

Sorry, no update yet. Haven't been able to get the boat out. Kiddos soccer season started and free time on the weekends has gone to crap.

 

[anmut]

Sorry, no update yet. Haven't been able to get the boat out. Kiddos soccer season started and free time on the weekends has gone to crap.

I'm trying to be understanding... but some of us need for you to get your priorities straight

 

[dailyderbi]

I'm trying to be understanding... but some of us need for you to get your priorities straight

Clearly I have some deep thinking to do about the direction of my life

 

[BKAnderson79]

Did you ever get the boat out to determine difference with the twin impeller? I’m also in Utah and need to re- pitch due to out elevation so very interested in your results.

 

[FSH 210 Sport]

Did you ever get the boat out to determine difference with the twin impeller? I’m also in Utah and need to re- pitch due to out elevation so very interested in your results.

Here is a thread you might be interested in on the subject

D

Thread 'Who has experience with twin screw impellers?'

May 16, 2022

Just ordered a twin setup for my sx190 from impros and wanted to see if anyone had any experience running one of these? I primarily want to pull tubers and cruise with adults.

• Dirtymunoz
• Replies: 100
• Forum: General Discussion

 

[dailyderbi]

Unfortunately, I haven't really had the time to test it. I did take it out for a quick 5 minute spin on Utah Lake to ensure that it was installed correctly. That very quick runabout showed me three things:

1. It does, indeed, have WAY more get up and go. Hole shots feel like they're getting a bunch more bite now.
2. On the no wake mode, in highest setting, it vibrates like crazy. Not sure what this is. Could be my tunnel sealing...? It's annoying AF though and almost enough to want to go back to the regular impeller if I can't get it to sort out.
3. It's super loud. Between that and the K&N filter, the boat is really noisy. I'm not sure the kiddos or the wife will want to put up with it.

That said, I need to actually do much more testing. But as of yesterday, I've oil changed and fogged my boat, got it on scissor stands in the garage and called it a season. So testing will have to wait for a few more months.

 

[dailyderbi]

Hi all- apologies on making you wait a long time for the results of this. After three big trips out to local lakes (including a multi-day trip to Lake Powell), here are my thoughts on the dual impeller:

Pros:

• Incredible power and much more low-end bite in the water. Hole shots are very quick, and getting the boat on plane takes noticeably less time than the stock impeller.
• Way more power. Pulling a tube around was night and day. Getting enough speed and torque to get the tube out of the wake was effortless compared to the stock impeller. This is where I noticed the most improvement.

Cons:

• Definitely lose top end speed. I'd we can top out around 35 MPH where we were nudging up to 40 before. This isn't a huge deal as we're not typically running our boat at redline, but something to consider.
• This is the biggest downside- the wake is very degraded. With the stock impeller, a fatsack and a wake booster, we were able to routinely surf the wave with no tow rope needed. Now, the wake is significantly lower even on the same fatsack/wakebooster set up. It's unsurfable without a tow rope. Not sure how the duel impeller has this impact, but it definitely does.
• Less refined ride- more vibration and a bit louder.

 

[Ribs77]

Hi all- apologies on making you wait a long time for the results of this. After three big trips out to local lakes (including a multi-day trip to Lake Powell), here are my thoughts on the dual impeller:

Pros:

• Incredible power and much more low-end bite in the water. Hole shots are very quick, and getting the boat on plane takes noticeably less time than the stock impeller.
• Way more power. Pulling a tube around was night and day. Getting enough speed and torque to get the tube out of the wake was effortless compared to the stock impeller. This is where I noticed the most improvement.

Cons:

• Definitely lose top end speed. I'd we can top out around 35 MPH where we were nudging up to 40 before. This isn't a huge deal as we're not typically running our boat at redline, but something to consider.
• This is the biggest downside- the wake is very degraded. With the stock impeller, a fatsack and a wake booster, we were able to routinely surf the wave with no tow rope needed. Now, the wake is significantly lower even on the same fatsack/wakebooster set up. It's unsurfable without a tow rope. Not sure how the duel impeller has this impact, but it definitely does.
• Less refined ride- more vibration and a bit louder.

Oh, no. That's disappointing to hear about the wake. The only reason I'd consider this upgrade is for better holeshot when pulling heavy surfers up. But I can barely get the wave big enough as-is—I definitely don't want to degrade it.

 

[FSH 210 Sport]

Oh, no. That's disappointing to hear about the wake. The only reason I'd consider this upgrade is for better holeshot when pulling heavy surfers up. But I can barely get the wave big enough as-is—I definitely don't want to degrade it.

I’d have a look at @anmut ‘s thread on the twin screw impellers from Leading Edge, basically he, @anmut reports nothing but good things from the twin screw.

Thread 'Leading Edge Twin Impellers: Review Thread'

May 7, 2025

Starting a review thread for others considering the upgrade to the twin impeller design by Leading Edge. Here's the link to the impellers I purchased for my 2020 212S: Yamaha 212 Twin Force Impeller

Boat specs at time of this review:
270 hours on motors
3 people
Full gas
500lbs of lead
Dual AGM house batteries
Yesterday was our first run of 2025, just a shakedown run to start the season. I ran a stretch of the Wisconsin River near our home which was still flowing a lot of water from spring rain.

Notes (my percentage estimates are just guesstimates based on the previous 270 hours...

• anmut
• Replies: 12
• Forum: General Discussion

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[anmut]

Oh, no. That's disappointing to hear about the wake. The only reason I'd consider this upgrade is for better holeshot when pulling heavy surfers up. But I can barely get the wave big enough as-is—I definitely don't want to degrade it.

I'll get some pictures this weekend, but my surf wave is fantastic. No complaints at all, and I can put it out without the motors screaming at high revs. Could be the difference between the OPs single engine 19' boat and my dual engine 21' boat...