01-17-2011, 03:47 AM #1
X charger , injector & impeller upgrade but only 7,000 rpm !!! 2005 seadoo challenger
Anyone with a clue please a bit of guidance ... I upgraded my jet boat with an x charger , 42 injectors and the impeller i was advised even by jerry (15/22 & wear ring) . She appeared to run sweet but only got to 7,000 rpm when full throttle in the bay (water a little rough ) . Anyone have an idea why this is happening as i was told i should be redlining without an ecu flash ?????
01-17-2011, 04:19 AM #2
01-17-2011, 06:05 AM #3
X charger wasnt new no but i was told the slip etc was checked , not sure what to do or how to check the boost leak etc , will running it like that cause damage ??
01-17-2011, 08:29 AM #4
What ski, or boat? Could be just an easy check for any lose SCer hoses for a boost leak.
But you could very well be over prop. Need to know ski. Please.
01-17-2011, 08:37 AM #5
01-17-2011, 08:40 AM #6
Stock IC? Even if not the 15/22 is a bit much even on a ski with x-charger and external ic. I have always installed 15/20's on ski's that I set-up with x-charger ,fizzle cooler, 4 in rear air, and exhaust mods and usually turn around 8160. Seems it should still turn more than 7000 though but being it is a boat I dont have any real experience with it but I would suspect it can turn less prop than a ski. Still seems quite low though.
01-17-2011, 08:46 AM #7
It's a boat, the engine needs to do alot more work to spin those rpms. I'm thinking something like a 14/19 or maybe a tweaked 15/20 should work out....even a 14/18 actually.....a 15/22 is way too big for a boat.
01-17-2011, 09:01 AM #8
01-17-2011, 10:51 AM #9
- Join Date
- Mar 2006
WAY too much pitch...
01-17-2011, 10:57 AM #10
Yep, get rid of that 15-22.
and get to 8100+ Rpm's and your boat will wake up.
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