Great news! The new 4 blade impeller for the 2021 RXP-X is now available.

[DinoMite]

Well, here’s the results of our testing on our 2021 stage 2 RXP-X
we will re test with stage 3 and hopefully see similar results to Jesus

STOCK IMPELLER:
5-60 3.18s
80.6 MPH
8300 RPM


13/18 IMPELLER:
5-60 3.36s
79.9 MPH
8200 RPM


13/15 IMPELLER
5-60 3.43s
80.4 MPH
8300 RPM

Looking at my results when I ran;

Full tank, 8200 occasionally saw blip to 8300. I"m guessing higher 82XX range. 77 one way 75.68gps, 78(blips to 79) 76.47 gps the other. 5-60 3.7X seconds. 82F water, 80air, salt water....stock prop

How do you get to 80.6 GPS from my 76 GPS Average of back to back runs ? 4.6 mph is huge. I'm struggling, buying the stock impeller does 80 GPS at 8300RPM. Maybe super light rider and no fuel might get you there. I ride salt water so maybe i'm a 1mph slower than fresh water.

[1tommygunner1927]

deja vu

Lots of hype when that impeller got demoed, just like this one, and it kinda fizzled out.

Kinda looking that way! Maybe the stock impeller is best....at least for stage 2.

[Vman]

How do you get to 80.6 GPS from my 76 GPS Average of back to back runs ? 4.6 mph is huge. I'm struggling, buying the stock impeller does 80 GPS at 8300RPM. Maybe super light rider and no fuel might get you there. I ride salt water so maybe i'm a 1mph slower than fresh water.

I'm with You (based on what I'm seeing with my ski) and I doubt light everything would make that much of a difference... something else going on here. I gotta look again and make sure that I'm not dragging an anchor or anything!

[hotbutta]

Jerry, were all of the impellers untouched with their stock pitches?

[jeff24680]

Here is a stock impeller off a 2020 RXT for comparison.

I did my best with photos, take em or leave em.

[Green Hulk]

How do you get to 80.6 GPS from my 76 GPS Average of back to back runs ? 4.6 mph is huge. I'm struggling, buying the stock impeller does 80 GPS at 8300RPM. Maybe super light rider and no fuel might get you there. I ride salt water so maybe i'm a 1mph slower than fresh water.

I'm with You (based on what I'm seeing with my ski) and I doubt light everything would make that much of a difference... something else going on here. I gotta look again and make sure that I'm not dragging an anchor or anything!

All testing with all 3 impellers was done with a full tank of fuel. Topped off each time. We have learned that this new 2021+ hull is very sensitive to weight. Greg is only 150 lbs which is helping a lot. We are also using a stainless steel wear ring. If you are using a plastic wear ring it could be worn.

[Green Hulk]

Jerry, were all of the impellers untouched with their stock pitches?

All impellers untouched.

[jetplane]

All impellers untouched.

It should be better to make a test between 13/16 3 blade vs 13/15 4 blade . I think the 13/18 is way too long to see good result compared with 13/16 . What do you think ?

[moparguy]

A 3 blade will always be faster topend and 4 will be better low with less cavitation, or atleast that's how it is with boats.

[ptscon]

A 3 blade will always be faster topend and 4 will be better low with less cavitation, or atleast that's how it is with boats.

Isn't that backwards?

It seems every few months a new magical impeller gets announced with lots of hype and then reality kicks in. Stock '21+ impeller seems to be winning no matter whats thrown at it.