2021 GP1800R Stage 3 Speed Results

[GreenHulk Jr]

Finally got around to getting my Stage 3 GP wrapped up and on the water. Installed is the RIVA Stage 3 kit, intake manifold upgrade, stock intake grate, RIVA Gen 2 ride plate. After burning a tank of gas and riding for a few hours, I filled it back up and did a few speed runs. I managed 90.4 @ 9250 RPM on a full tank of gas in 84 degree weather. The tune needs some work; AFR at WOT was on the rich side so leaning it out a bit will bring up RPM and speed. Of course, having less than 100 pounds of fuel in the front of the ski will help too.

[seabrook]

man awesome!

[rephraim]

Interesting it’s only a little over 1 MPH faster than the Stage 2 AGR tune test run you did with the Riva intake grate. Looking forward to seeing the results after you dial her in some more.

[1GlockFan]

That is AWSOME!!!

[GreenHulk Jr]

Interesting it’s only a little over 1 MPH faster than the Stage 2 AGR tune test run you did with the Riva intake grate. Looking forward to seeing the results after you dial her in some more.

This tune is much richer than it was on stage 2...stage 2 results were also not on a full tank of fuel and 100 pounds of gas will make a huge difference. There is still a lot of work left to do to get the speed where it should be but I don't think it's too bad for the first run with zero fine tuning involved. I am definitely not satisfied with 90.4 mph.

[VIGP13]

This tune is much richer than it was on stage 2...stage 2 results were also not on a full tank of fuel and 100 pounds of gas will make a huge difference. There is still a lot of work left to do to get the speed where it should be but I don't think it's too bad for the first run with zero fine tuning involved. I am definitely not satisfied with 90.4 mph.

Hi, are you still running the stock SC clutch and is there a good aftermarket replacement ? Thanks

[chris1200]

Nice to see the stock grate is able to handle those speeds

[GreenHulk Jr]

Hi, are you still running the stock SC clutch and is there a good aftermarket replacement ? Thanks

I’m still using the original supercharger clutch with over 100 hours of hard abuse. I wouldn’t bother with any aftermarket clutches.

[GreenHulk Jr]

Nice to see the stock grate is able to handle those speeds

It is probably pushing it.

[Mr. GP1800]

Why no riva grate? Just trying for a top speed number?

[VIGP13]

I’m still using the original supercharger clutch with over 100 hours of hard abuse. I wouldn’t bother with any aftermarket clutches.

wow, I’m running a 2022 gp1800R with 22.1 hours and it feels like the clutch is already failing!

[GreenHulk Jr]

Why no riva grate? Just trying for a top speed number?

Just trying to get a higher top speed number. After I'll put the RIVA grate on.

[FAMT]

- did u use R3 or R4 Wheel ?
- did u got any cold start issues with that Base Stage 3 tune ?
- What did u think top speed wise ? empty tank and you as an light rider 95 mph ?

[GreenHulk Jr]

- did u use R3 or R4 Wheel ?
- did u got any cold start issues with that Base Stage 3 tune ?
- What did u think top speed wise ? empty tank and you as an light rider 95 mph ?

I am using the R3 impeller for now.
I have a lot of issues with the tune and idle is one of them. I am using the Stage 3 9500 R3 F20 3 Bar tune. At idle it is so lean it barely stays running. Slow cruising speeds are also dangerously lean. WOT is too rich.
I think it'll have the potential to do 95 mph in absolute perfect conditions with much higher RPM and an aggressive tune; I do not intend to try to push it that far on the R3. I'll be satisfied with 92+.

[TAB686]

If there was only a guy on here that knew how to tune these things you could get it dialed in......