Thread: changed to 160mm rpm dropped !!!
02-08-2013, 08:02 AM #1
changed to 160mm rpm dropped !!!
I have the stage 3 from riva and r3 ecu from R&D
when I was on the 155mm pump set up with 12/22 prop my rpms were 8400
and now when I converted to 160mm set up with 15/23 prop my rpms
dropped to 7200 !!!
any advices on the prop ?
im a sea rider and temperatures here is really hot
02-08-2013, 08:23 AM #2
- Join Date
- Jul 2005
- Central North Carolina
When you go to a larger 160 mm diameter impeller in order to keep the same rpms you need a impeller with 2 mm less pitch than your current pitch 155 mm pitch. With the information you have posted your 160 mm impeller needs to be a 13/20 or possible a 13/19 due to the hot temperatures you have. Also switching to a 85 or 87 mm reduction nozzle will help along with a lower pitch impeller also. Tommy Jordan
Last edited by 2fast4u; 02-08-2013 at 11:00 AM.
02-08-2013, 11:05 AM #3
02-09-2013, 08:48 AM #4
thanks guys for the info
but what about trying 12/22 pitch on the 160mm ?
any ideas what rpms I will get ?
I'm asking this because on the stock pump set up the 155mm
prop 12/22 stock ,I'm getting my best rpms 8600
02-09-2013, 10:17 AM #5
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