KX Guru Racing

Looks similar
PRO CIRCUIT WATER PUMP COVER IMPELLER KX-250F RMZ-250

See what I get for missing a day at the OEM site!
Right on, SB. cleaning up the cover will help. The smoother the cover & Impeller is, the less chance of starting cavitation in coolant.
That Pro circuit impeller looks like it'll push more coolant than the oem impeller & create less cavitation at higher rpm.
I'm sure the inside of the PC cover looks similar to the SuperCooler. ( Larger inlet and Smooth transitions.)
Great Work, Keep it up!
Tuck \o/

I think I'm going to see if Pro Circuit will sell me just the impeller.
I'll give them a call later today.
For now here is a pic of the inside of the cover for my sand bike.

Modified. Not modified:


It feels a lot smoother then it looks.
And yes, it is a bit harder to do it on a full cover rather then the experimental 1/2 cover but by no means impossible.
It took me 10 or 15 minutes to get it about as good as I can get it.
I just finished doing the Cover to Impeller mod so I can't wait to go ride it

I called Pro Circuit and they will not sell you a water pump impeller without the cover
Oh well, I'll keep a watch on PayBay.

Looks great SB,
The clear hose Should tell the story as well as the lower temps.
More Good work!
Tuck\o/

I'd love to take credit but Motorrad was the one who came up with the clear hose idea.
Doesn't mean that I won't use it
I just put a modified impeller and cover in my sand bike.
Can't wait for the hot weather to get here so I can really test this out..

Friar-Tuck wrote:See what I get for missing a day at the OEM site!
Right on, SB. cleaning up the cover will help. The smoother the cover & Impeller is, the less chance of starting cavitation in coolant.
That Pro circuit impeller looks like it'll push more coolant than the oem impeller & create less cavitation at higher rpm.
I'm sure the inside of the PC cover looks similar to the SuperCooler. ( Larger inlet and Smooth transitions.)
Great Work, Keep it up!
Tuck \o/

All the impellers I have tested on my cooling system dyno have cavitation issue at from 6K rpm and up. These impellers are cut to same profile has cover.

Hmmm.. spinning over 6-K,
I suppose if you were racing and had sustained high speed, you might have to come up with an alternative way to either spin the impeller,
or use a different design for sustained high speeds. (Like the auto industry)
If you could work out the cavitation problem with impeller design, you may be pumping the coolant too quickly through the system for the rads to adequately pull the heat out of the coolant at sustained high engine rpm.
Then you may have the coolant moving too slowly below 4- 6k if you were trail riding or cool down/ warm up between runs.
What type of riding are you looking to set the bike up for Q-Six?

SB,
“It is amazing how much can be accomplished if no one cares who gets the credit.” -John Wooden
Tuck\o/

"Better to remain silent and be thought a fool than to speak out and remove all doubt." - Abraham Lincoln
I talk too much

This has been bugging me like when a song gets stuck in your head!
I do remember modifying the first gen honda 450 impeller on the bike we had for a while. The company fixed the issue
on the next model year. What I'm wondering is if you have a later model CRF 450 in a bin that you might compare the
impeller with SB.
Those bikes are run at a pretty good clip (rpm) to be kept in their sweet spot IIRC.
Just something else to bench race about...

Cavitation, causes http://www.bing.com/images/search?q=Pum ... ORM=RESTAB
http://www.pumped101.com/cavitation.pdf

Impeller design http://www.bing.com/images/search?q=pum ... ORM=HDRSC2
http://www.bing.com/images/search?q=Imp ... ORM=RESTAB

and last but not least http://www.pumpcalcs.com/
Tuck\o/