Thread: GTX SC w/B Kit and Reflashed ECU
03-15-2006, 11:05 PM #1
GTX SC w/B Kit and Reflashed ECU
There is nothing that can describe the brute power and acceleration this combo produces. It is just plain "SCARY" fast. My prop is not even fully tweeked either and will be on its way to Jerry really soon. Here are the conditions and results:
04 GTX SC
8200 - 8250 RPM's
Windy and 2 ft chop on the lake
Outside temps 58
Water temps 54
11 lbs of boost (once RPM's increases, boost will increase)
Could not get an accurate read on the A/F ratio because it appears that the 02 sensor took a shit on me....Replacement is about $35 I think and I'll have it on the next outing.
Now for the mishap from hell:
After everything was going well and cruising along on the lake about 9 miles out I hear a popping sound. Seemed like there was some serious cavitation and sluggish. I eased back into up to about 7000 RPM's and everything goes dead, motor, electric, EVERYTHING. I pull the lanyard and put back in and I now have power but the motor won't even crank. Take the back seat off and water is almost over the entire motor. Let me tell you all something right now, that bilge pump saved my ass. Standing on the rear of the Doo with all of that water in the hull knocked me off and it almost capsized. Then it was starting to sink ass end down. I was able to get to the bilge switch in enough time to start getting that water out of the hull. Had it not been for the bilge, my doo would be 38ft under the lake right now. Next, made a call to 911, got towed in by the fire department (john boat) Did not pinch hose like you are supposed to do, but no damage luckily. There was a shit load of water in the water box though. I don't know how or why, but when I removed the plugs there was absolutely no water in the engine, and compression in all cylinders was 115 -120. No hydrolock or engine damage. After removing and installing the plugs, it eventually fired up and sounds smooth as silk. There is not one hose or clamp loose and I have gone over that thing with a fine tooth comb and cannot see how the hell this happened. Checked the intercooler, thru hull, and block offs. Next I will fill the hull with water and see if it is a carbon seal problem. So, there ya go....I cannot reiterate enough, whether an RXP, RXT, or GTX, with the money we are dropping into these machines, a BILGE PUMP is a must along with the cell and a nice wet suit. These three things saved my ass! Here is a pic of a clogged up bailer tube that I did notice, but I don't think that was the culprit to filling up my entire hull. All of the bailer tubes are in place everywhere.
Oh yeah, thanks to Nils and Jerry for keeping me company when I was stuck out there.... and Nils walking me through the engine check procedure when I finally got home....
03-15-2006, 11:16 PM #2
I know it sounds like a long shot... but look and see if your intake grate is still there.
Mine departed the ski last year and the ski damn near sunk. Seems that the front bolt is a potential "hull hole from hell"
03-15-2006, 11:47 PM #3
man sorry to hear about ur bad experience, but i think im going to look more into getting a bilge pump now after reading about this. glad to see ur numbers with that setup though!
03-15-2006, 11:54 PM #4Originally Posted by 05Limited
I checked that while waiting for my escort/tow back to the marina to arrive, it's OK...
03-15-2006, 11:55 PM #5Originally Posted by rxpblast
03-16-2006, 12:14 AM #6
I'll bet that crap in the bailer lines is what caused it. If something is stuck in the check valve it will stay open and dump water INTO the hull.
03-16-2006, 12:34 AM #7
i agree... i bet they were the culprit!! ur ski shouldn't have filled up that quick if u were doing a decent criusing speed. the bailers can pump water at a decent rate (not 500 GPH obviously). It's been known to happen that the bailers actually pump water INTO the hull when they are messed up.
It's certainly something to look into very highly... would be nice if it was that simple. Good thinking lurker!!
03-16-2006, 12:37 AM #8
- Join Date
- Oct 2005
- Ann Arbor, MI
Off Topic: Shibby I sent you a PM...
03-16-2006, 07:37 AM #9Originally Posted by _Lurker_
03-16-2006, 08:58 AM #10
RD: Do you run the through hull exhaust? If so, be sure to double check the coupler at the very end of the pipe that leads out of the hull. You might have to check it through your opas block off. I figured you probably did this already, but with all the moving around of the waterbox for the install, you could have unhooked it. Just my .02.
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