KTM 525 water pump flow rate?

[Optixtruf]

Hey guys,

Just wondering if any other teams have water flow rate numbers for the stock mechanical 525 KTM water pump. The rotameter we have access to is unwieldy for the engine dyno, we weren't able to get any flow rate numbers. I've called KTM, to no avail.

Thanks!

[Kirk Feldkamp]

GEMS has sensors that are relatively small and are in the right range for what you're trying to do. They're not super cheap, but they also won't break the bank. The data you can collect with it is well worth the price of admission, IMHO.

http://www.gemssensors.com/en/...w-Sensors/Rotor-Flow (http://www.gemssensors.com/en/Products/Flow/Electronic-Flow-Sensors/Rotor-Flow)

[Adambomb]

I've played this game before, and in the end my opinion is it's pretty hard to beat a "calibrated bucket" and a stopwatch. http://fsae.com/groupee_common/emoticons/icon_razz.gif

[JWard]

Originally posted by Adambomb:
I've played this game before, and in the end my opinion is it's pretty hard to beat a "calibrated bucket" and a stopwatch. http://fsae.com/groupee_common/emoticons/icon_razz.gif

Did you set up a dummy cooling system to simulate the pressure drop in the cooling pipes and rad(s)? I imagined you'd ran an external cooling system and use the mech water pump hooked up to the dummy system and into a bucket?

I would like to have done this with our engine, as our cooling calcs could have done with a more, erm, robust, value for flow rate plugged in. Would have been nice to see what the ktm 'higher flow rate' impeller actualy did too.

[Adambomb]

Yeah, pretty much the easiest way to do it is with it actually in the car. Again, probably not 100% accurate, but then again it's not like you can make use of a terribly precise value in the rest of your calcs anyway.