09-17-2011, 10:34 PM #1
rxp with x and external i/c rpm questions
Hey guys I got some questions about my rxp rpms. Its a 2005 on the digital gauge it only reads in imcrements of 50 so 8000 8050 and 8100. Should it read in 10 or 20 rpm increments? Also my next question is I just put the external i/c and the rising rate on it was running rich up top at 11.2 to 11.3 at 8150 with a speed of 74mph. I ended up lowering pressure to 55.5 psi to get my afrs to 11.8-12. I went from 74 to 75.5 but my rpms never changed. How is this possible
09-18-2011, 01:54 PM #2
Were you going in the same direction... with or against the current both times.
09-18-2011, 01:59 PM #3
- Join Date
- Dec 2006
- Crest Hill, IL
04-05's only go in increments of 50, 8100 is the number you are wanting...8150 bounces the limiter and cuts ignition...You got the AFR right which allowed you to probably sustain WOT for a longer time, hence your slight gain in speed...
09-18-2011, 02:20 PM #4
You're running hard on the limiter Drew! Better watch your exhaust manifold bell if you keep riding without bringing the rpms down.
09-18-2011, 02:37 PM #5
I wouldnt worry about the bell on your exhaust manifold,90% of us have no bell left on ours....
09-19-2011, 01:43 AM #6
i ran both ways up and down but i gpsed sitting still and my max speed was .1 mph.lol fastest the ski has ever gone. when it was running 11.2 it hit 74 both ways and then when i leaned it out to 11.8 it hit 75.5 both ways. but stayed at the same rpm. so you guys all think that 8100 is optimal rpm? everyone seemed to say 8150. instead of pitching the prop should i drop a ring size from 83 to 82mm or 81mm. i am not sure if i will have enough jam to spin 8100 with a 81mm nozzle
09-19-2011, 01:49 AM #7
09-19-2011, 02:07 AM #8
09-19-2011, 03:46 AM #9
09-19-2011, 04:53 AM #10
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