2022 AR190 Riva Maptuner has anyone done one and was it worth it? Can not find any info on it.

[FSH 210 Sport]

I did order a tuner from RIVA Racing. So will be going down that rabbit hole next. Then impeller chasing.

Have you checked your impeller and made sure there isn’t damage and or excessive gap in between the impeller and the wear ring?

 

[turbocrazy]

Have you checked your impeller and made sure there isn’t damage and or excessive gap in between the impeller and the wear ring?

yes sir. Its good.

 

[FSH 210 Sport]

yes sir. Its good.

Any news to report ?

 

[turbocrazy]

Any news to report ?

I got the Tuner here, but I have not installed yet. I hope to get it done today, possibly tomorrow. I was trying to run most of the gas out of it, but didn't get to use it as much this weekend.

 

[FSH 210 Sport]

I got the Tuner here, but I have not installed yet. I hope to get it done today, possibly tomorrow. I was trying to run most of the gas out of it, but didn't get to use it as much this weekend.

Something wrong with the gas?

 

[turbocrazy]

Something wrong with the gas?

with the tune in it you run premium fuel.

 

[turbocrazy]

Something wrong with the gas?

Installed it and did not video anything yet. but top speed today was 38 mph and I had an average of 7550 RPMs It spiked to 7820 from take off then settled down to 7200ish then started slowly climbing. I sent of the Data log so he can build a tune plus figure out what impeller to use. 85 temp 58 Percent humidity, dew point is 69 degrees. This was also with my bimini top up. I was wrong on the gas, do not need premium until the next tune.

 

[FSH 210 Sport]

Looks like you had some cavitation on take off before it hooked up and gained speed. What’s in the tune? Does it raise the rev limiter? Did riva supply you with a data logger?

 

[turbocrazy]

Looks like you had some cavitation on take off before it hooked up and gained speed. What’s in the tune? Does it raise the rev limiter? Did riva supply you with a data logger?

It does raise the rev limiter. Not sure what else he changed, It is a Nano tuner and you use your cell phone, it is very easy to data log and send the information, plus he was quick to respond and send back new tune. Now to play with Impellers. He suggested to start with a 11/15 and repitch from there if need be if the hole shot was to bad.

 

[FSH 210 Sport]

It does raise the rev limiter. Not sure what else he changed, It is a Nano tuner and you use your cell phone, it is very easy to data log and send the information, plus he was quick to respond and send back new tune. Now to play with Impellers. He suggested to start with a 11/15 and repitch from there if need be if the hole shot was to bad.

What was the rev limiter increased to ? And what is the stock rev limiter set at?
So the app uses your phone as the data logger?

My prediction will be that when you drop the impeller pitch to increase the rpms to the new rev limit which just increases effective displacement to move more air and burn more fuel, that your “hole shot” will suffer, E.G. it will cavitate badly if you apply throttle too quickly, and may break away in tight turns.

How much have you spent so far on the tuner? I don’t mean to be rude but I know I, and I believe others, want to see how much money is being spent for how much of a gain in top speed and what the down sides are.

I suggest before you start swapping impellers, since there doesn’t appear to be any gains thus far as your top speed is still the same, you go out and run a series of tests to see exactly how that OEM impeller behaves, check the gph at different rpm levels, make a full lock turn at WFO and hold until you’re going really slow in a tight circle, note the level of cavitation that is occurring then straighten the wheel and note the level of cavitation as the engine revs back up and starts to accelerate. Put the boat riding the hump, or nose high just before the boat will plane, note the level of cavitation-you’ll hear and feel it if any and the rpms in all of these situations. I ran all of the same tests when I was testing impellers and still do when I test to know as best as I can what the changes in the impeller do across the operational envelope.


Looks like your density altitude was 2796 last time out.. you didn’t include the altimeter setting so I just picked 29.95. From what I can see there was no gain so far from the tuner. After you got the engine sorted and removed the ribbon, which netted about 100 rpm, 7450 to 7550, increase in slightly lower density altitude conditions and the speed was the same at 38 mph. Yes the break away revs were higher at 7820 due to the higher rev limit but dropped back to 7200 once the impeller hooked up and slowly climbed up to a peak of 7550.

 

[turbocrazy]

What was the rev limiter increased to ? And what is the stock rev limiter set at?
So the app uses your phone as the data logger?

My prediction will be that when you drop the impeller pitch to increase the rpms to the new rev limit which just increases effective displacement to move more air and burn more fuel, that your “hole shot” will suffer, E.G. it will cavitate badly if you apply throttle too quickly, and may break away in tight turns.

How much have you spent so far on the tuner? I don’t mean to be rude but I know I, and I believe others, want to see how much money is being spent for how much of a gain in top speed and what the down sides are.

I suggest before you start swapping impellers, since there doesn’t appear to be any gains thus far as your top speed is still the same, you go out and run a series of tests to see exactly how that OEM impeller behaves, check the gph at different rpm levels, make a full lock turn at WFO and hold until you’re going really slow in a tight circle, note the level of cavitation that is occurring then straighten the wheel and note the level of cavitation as the engine revs back up and starts to accelerate. Put the boat riding the hump, or nose high just before the boat will plane, note the level of cavitation-you’ll hear and feel it if any and the rpms in all of these situations. I ran all of the same tests when I was testing impellers and still do when I test to know as best as I can what the changes in the impeller do across the operational envelope.


Looks like your density altitude was 2796 last time out.. you didn’t include the altimeter setting so I just picked 29.95. From what I can see there was no gain so far from the tuner. After you got the engine sorted and removed the ribbon, which netted about 100 rpm, 7450 to 7550, increase in slightly lower density altitude conditions and the speed was the same at 38 mph. Yes the break away revs were higher at 7820 due to the higher rev limit but dropped back to 7200 once the impeller hooked up and slowly climbed up to a peak of 7550.

View attachment 246410

I 100 percent agree that for what I have gained to this point would not be worth going this avenue for top speed. Even the tuner laid that out. He said I would not see any gains at the moment on top speed and it is pretty much expected that the prop is going to need repitched, but we are going to start at 11/15 and see how that acts.

I did do a series of test runs, plus hard turns to see how it recovered. To be honest, compared to what I am used to it feels weak, but I have a full understanding of what I am up against and what the boat is capable of. The tuner with data logging is 940.30. The Ribbon Delete 43.95 and power filter 257.95

The best part about this, as I do upgrades and changes he can send a tune in the mater of minutes for me to change. That is where it makes since to me.

The Rev limiter was at 7800 and is now 8500.

So back story on me. Everything I own, I tinker with it. I used to ride four wheelers and in 2007 I bought a new LTR450, before the break end period was complete, I pulled the top end and put a high compression piston, performance cams, ported head, pipe, tune and sprockets.

 

[FSH 210 Sport]

I 100 percent agree that for what I have gained to this point would not be worth going this avenue for top speed. Even the tuner laid that out. He said I would not see any gains at the moment on top speed and it is pretty much expected that the prop is going to need repitched, but we are going to start at 11/15 and see how that acts.

I did do a series of test runs, plus hard turns to see how it recovered. To be honest, compared to what I am used to it feels weak, but I have a full understanding of what I am up against and what the boat is capable of. The tuner with data logging is 940.30. The Ribbon Delete 43.95 and power filter 257.95

The best part about this, as I do upgrades and changes he can send a tune in the mater of minutes for me to change. That is where it makes since to me.

The Rev limiter was at 7800 and is now 8500.

So back story on me. Everything I own, I tinker with it. I used to ride four wheelers and in 2007 I bought a new LTR450, before the break end period was complete, I pulled the top end and put a high compression piston, performance cams, ported head, pipe, tune and sprockets.

Firstly, I appreciate your candor on this!

Appreciate the info on the cost as well. I have the ribbon delete kits just have not installed them yet, but do have the filter and thats installed.

Copy that you like to spin wrenches, just trying to learn what is actually happening.

 

[FSH 210 Sport]

I 100 percent agree that for what I have gained to this point would not be worth going this avenue for top speed. Even the tuner laid that out. He said I would not see any gains at the moment on top speed and it is pretty much expected that the prop is going to need repitched, but we are going to start at 11/15 and see how that acts.

I did do a series of test runs, plus hard turns to see how it recovered. To be honest, compared to what I am used to it feels weak, but I have a full understanding of what I am up against and what the boat is capable of. The tuner with data logging is 940.30. The Ribbon Delete 43.95 and power filter 257.95

The best part about this, as I do upgrades and changes he can send a tune in the mater of minutes for me to change. That is where it makes since to me.

The Rev limiter was at 7800 and is now 8500.

So back story on me. Everything I own, I tinker with it. I used to ride four wheelers and in 2007 I bought a new LTR450, before the break end period was complete, I pulled the top end and put a high compression piston, performance cams, ported head, pipe, tune and sprockets.

Any new results to report?

 

[turbocrazy]

Any new results to report?

I have the new impeller here, but with the Holiday and busy lake season, my fun time has been put on hold. Putting in long hours on customer boats. I hope to get it swapped out in a week or so!

 

[turbocrazy]

I installed the 11/15 Solas impeller today. I seen a top speed of 39 MPH and rpms around 7600. I could not give it full throttle from still with out cavitating, but roll into the throttle and then full throttle worked fine. Heavy turns it never cavitated. Today was fairly hot 94 54% humidity and 70 degree dew point.

I did forget to take the tuner with me. I will be going back out and data logging so I can send to Jesus Garcia for him to do some tweaking.

 

[FSH 210 Sport]

I installed the 11/15 Solas impeller today. I seen a top speed of 39 MPH and rpms around 7600. I could not give it full throttle from still with out cavitating, but roll into the throttle and then full throttle worked fine. Heavy turns it never cavitated. Today was fairly hot 94 54% humidity and 70 degree dew point.

I did forget to take the tuner with me. I will be going back out and data logging so I can send to Jesus Garcia for him to do some tweaking.

What was the new rev limiter set point?

What you experienced is what I thought I told you would happen, with a lower pitch impeller there will be no hard hole shot, you have to roll into it.

You mentioned hard turns with no cavitation, try holding the boat into a max left or right turn where you are just basically going in a small circle at WFO, see if it cav’s there, then let the wheel go so as to go straight and see if it cav’s then. If it does and you keep reducing pitch the cavitation will get worse.

 

[turbocrazy]

What was the new rev limiter set point?

What you experienced is what I thought I told you would happen, with a lower pitch impeller there will be no hard hole shot, you have to roll into it.

You mentioned hard turns with no cavitation, try holding the boat into a max left or right turn where you are just basically going in a small circle at WFO, see if it cav’s there, then let the wheel go so as to go straight and see if it cav’s then. If it does and you keep reducing pitch the cavitation will get worse.

I honestly thought the hole shot would have been worse than it is, all I do is roll into and and pin it. It hooks at that point. I did full lock turns not 360 but 180 and it pulled out of those like normal. I plan on going out this evening and data logging. Getting close to seeing 40mph. I have a customer coming to look at an 2010 AR240 we are selling, so I have to work for a bit, before I play.

 

[FSH 210 Sport]

I honestly thought the hole shot would have been worse than it is, all I do is roll into and and pin it. It hooks at that point. I did full lock turns not 360 but 180 and it pulled out of those like normal. I plan on going out this evening and data logging. Getting close to seeing 40mph. I have a customer coming to look at an 2010 AR240 we are selling, so I have to work for a bit, before I play.

Any updates?

 

[FSH 210 Sport]

I was at Keystone lake a couple of weeks ago.. man, it was freaking Africa hot!!!!

 

[FSH 210 Sport]

I came across that vid today.