Thread: Rotax Racing Ecu Reflash
03-08-2008, 07:34 AM #1
- Join Date
- Jul 2005
- Lake Dunlap, Texas
Rotax Racing Ecu Reflash
Just saw on the PPG web site where Rotax can reflash the 4501/2007 model ECU for $520 plus shipping. This gives you 8800 RPM. 2006 and older boats not avaiable. Dont know if older models will become avaiable.
03-08-2008, 09:41 AM #2
Last edited by REID2168; 03-08-2008 at 12:57 PM.
03-08-2008, 12:35 PM #3
also know that the new x curve is very aggressive. it requires light retainers, light valves(or lightened valves) and minimum 93 octane fuel. don't think you can get away with the riva springs instead of lightening the valves, you must do both.
i know lots of rules to use this but look at it this way. if you use this ecu, high boost impeller, ported head and cam you are over 300 hp . 290 hp nets approx 83 mph properly set up so you do the math
also the new RR 159mm 16 vein pump adds approx 3 mph and superb hookup. i think we are going to see some crazy speeds from rec skis using pump gas this year. last year we saw 83.5 mph @8500 with 11.5 lbs of boost. this year we have 8800 to play with , 12.8 lbs boost and a new pump.
03-08-2008, 12:56 PM #4
03-08-2008, 12:58 PM #5
this is such a tough decision for the rec rider...
8800 rpms will net you some extra speed, and the curves of the X in the ecu are probably aggressive and powerful... no knock control tho
riva you get boost dependency and knock control... but lower rpm rev limit..
i'm torn... i need to make a purchase myslef and i dont know which way to go... for a turbo setup
03-08-2008, 01:27 PM #6
p.s. i am STILL somewhat confused as to why with this Rotax 8800 rpm ECU flash u would need the lightened valves to run the RPM's of 8800 with this when everyone is currently doing it with the STOCK valves and Riva springs and retainers and suprpasing these RPM's with other EMS systems like IGNI, Autronics, & Motec.......
Last edited by REID2168; 03-08-2008 at 01:33 PM.
03-08-2008, 01:38 PM #7
- Join Date
- Oct 2007
03-08-2008, 02:38 PM #8
i know jerry and JD1 to name two guys running aftermarket EMS setups are running lightweight valves for a couple years now, not stock.
i'd like to know if there's any rec riders running stock valves with aftermarket EMS over a long period of time successfully
the lightened valves are pretty noticeable lighter than stock tho to the touch. i have a race tech head on my RXP with mark's head work, his lightened stock valves, rotax shims and retainers, but it's never been run past 8500
03-08-2008, 03:26 PM #9
03-08-2008, 05:48 PM #10
Jerry and Dan had the big valve heads at one time and from checking with Ferrera I found that the big valves weighed as much as stock valves did.
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