Hi le Roux

On the Renesis I’ve put a race pump on to ‘reportedly’ reduce cavitation as the basic pump is reported to cavitate at the rpm’s we operate in during take off.
When I took out a restrictor in the return to the radiator on one flight tamper went up considerably and I reasoned this was caused by cavitation.
In response I purchased a race pump from New Zealand.

My water pump is running at OEM speed, but I slowed my alternator with a larger pulley.

Steve Izett


 

> On 16 Aug 2023, at 11:44 am, Le Roux Breytenbach breytenbachleroux@gmail.com <flyrotary@lancaironline.net> wrote:
>
> Hi : What is the optimum waterpump rpm for the 13B as i can modify the pulley diameter and ratio’s for my set - up
> The data i have is that at the standard ratio is 1:1.18  at 6500 rpm for the 13B the pump flo is round about 150 - 160 L per minute.
> So my question: If i run on 6500 rpm for take off then the waterpump impellor turns 6500 x 1.18 ???
> Must i put on a bigger diameter pully on the pump for a flo of round about 100 L per minute.?
> Don’t know  ?
>
> If somebody can help me with that
>
> Regards Le Roux
>
>
> Sent from my iPhone
> Le Roux Breytenbach
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