Impeller Q for a FX svho stage 3

[Super Jim]

I have the FX SVHO with the Riva stage 3, 17 psi wheel. Currently 86.7 mph at 8990 rpm with the Solas 13/20. What do you expect the results would be if I installed a Solas 13/18?

[Hurricane1000]

200 or so rpm....
More boost.
More speed

[Super Jim]

That is what I was hoping to hear. I shall give it a try.

Thanks.

[yellow jacket]

slower...the 13/20 seams to be the prop for the fx just take a mm out or it making it a 13/19 if u want more r's

[outnumbered]

13/19 appears to be the best setup for mine. I've hit 89.0, and that was on a clutch that went out the next day.

[Super Jim]

13/19 appears to be the best setup for mine. I've hit 89.0, and that was on a clutch that went out the next day.

I saw that. Impressive. It seems though the 13/18 would have put it right in the sweet spot you were shooting for. Has anyone done back to back testing on the 13/18 vs 13/20 on this stage 3 17# wheel set up for comparison?

[Dg1148]

I saw that. Impressive. It seems though the 13/18 would have put it right in the sweet spot you were shooting for. Has anyone done back to back testing on the 13/18 vs 13/20 on this stage 3 17# wheel set up for comparison?

I’m in the process of doing that. My out of the box 13/20 had me at 85/8600 rpms and my 13/17 had me at 9400 rpms. I’m pitching the 13/20 to a 13/19 and the 13/17 to a 13/18 and trying both of those out.

[outnumbered]

I saw that. Impressive. It seems though the 13/18 would have put it right in the sweet spot you were shooting for. Has anyone done back to back testing on the 13/18 vs 13/20 on this stage 3 17# wheel set up for comparison?

Once my pitch gauge arrives, I am going to see what my old 13/18 actually is. I think it's a 13/17, as it spins too high. If it is in fact still a 13/18, I can give you absolute conclusive results.

[Super Jim]

got my new Solas 13/18. Checked the pitch with my gauge and its right on. Install this week.

Note: I noticed that Riva is now installing the 13/18 on their 2019 limited FX1800R instear of the 13/20 as in the past.
https://rivaracing.com/i-24080317-ri...!make%3DYAMAHA

[outnumbered]

got my new Solas 13/18. Checked the pitch with my gauge and its right on. Install this week.

Note: I noticed that Riva is now installing the 13/18 on their 2019 limited FX1800R instear of the 13/20 as in the past.
https://rivaracing.com/i-24080317-ri...!make%3DYAMAHA

They are, but it is also 2mph slower than the previous model.