04-20-2014, 01:29 PM #1
- Join Date
- May 2013
Someone needs to ask the stupid questions!
Trying to get my head round the whole rpm limits (with n without tunes) and prop pitching.
Is the 'perfect pitch' one which allows the rpms at WOT to be a shade under the limiter? (How far below rpm limiter is a good position to give some peak headroom?)
So a too steep pitch will be too heavy on the engine and hold back the rpms?
Where as a too shallow pitch will hit rpm limiter before getting any decent speed up?
Does all this sound about right?
Trying to understand the principles before I tinker too much!
04-20-2014, 02:11 PM #2
04-20-2014, 02:37 PM #3
also you should have the rpms closer to the max in cooler weather
because when its hot you will loose a few rpms
the max rpms can be closer to the limit on a flat water ski
than a ski run in very rough water
04-20-2014, 04:10 PM #4
You want the Most rpms you can get when you have a gear driven charger. More rpms= more boost.
But at the same time you want to stay under the limiter or you will destroy the motor. On the limiter=lean=boom
In cooler weather on flat water aim for at least 50 RPM under the limiter. (100 rpm under is what I would do)
Last edited by hotbird; 04-21-2014 at 03:50 AM.
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By sn-95 in forum Sea Doo Open DiscussionReplies: 3Last Post: 09-18-2010, 11:21 AM
By vettez062002 in forum Yamaha PWC Performance (2-stroke)Replies: 10Last Post: 08-28-2010, 05:40 PM
By 206 in forum 4-Tec PerformanceReplies: 1Last Post: 06-24-2008, 04:48 AM
By ExciterGPR in forum Yamaha PWC Performance (2-stroke)Replies: 1Last Post: 12-10-2006, 05:43 PM
By big83bronco in forum Yamaha PWC Performance (2-stroke)Replies: 18Last Post: 10-28-2006, 08:48 PM