Impeller (Solas) high altitude

[Luna-azul]

We have a 2004 RXP 215 supercharged.
I need to replace my impeller and I'm thinking of either standard high altitude (we are at 5,000 feet) or a Solas SRC CD 14/19.
Which would you choose?

Also need to replace the wear ring. There are two replacements, the 267000105 and the "new" 267000372 which some have claimed to have trouble installing. Is there any size differences with these two wear rings or is it just a number change?

I was getting crazy cavitation and when I pulled the pump I saw a piece of plastic fin from the pump support housing against the impeller. So my question is how important are those "fins" and is it worth the trouble to replace the housing. There are a couple of others that appear to be broken off as well.

 

[red2blue]

'Dunno bout your ring question...oem's fine for most. Need pics of the pump/veins.

As for your prop question....What kind r's were you turning before you chewed up your ring? reason I ask...most folks at high altitude are down r's in the first place...speed wise...going with a taller prop will make things worse.

 

[KK40384]

At higher altitude you're making less power so a taller pitch impeller like the 14/19 will hurt your performance even on a RXP. You need some power enhancing mods to run that pitch at altitude. Closer to sea level that would be a decent pitch with basic mods.

To answer your question regarding the damage to the vanes in your pump, they are important. Damage to them will cause cavitation. In other words your pump housing is toast. Unless you plan on modding keep the stock impeller and replace the wear ring and pump housing.

 

[ken0276]

Some of the perfesional prop guys will figue out how much prop that you will need for your 5000 ft higher elevation boating, you should need a less pitch than the stock prop for the normal rpm, something is amazing in 1700 ft elevation of Vegas for the RC boating, if we got a 70 mph top speed here, with some boat and the setup, we would get the boat to run 75 mph top speed in the sea level California.