Tubo S and Mud problems - Polaris RZR Forum - RZR Forums.net
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post #1 of 4 Old July 7th, 2019, 03:58 PM Thread Starter
 
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Tubo S and Mud problems

Looking for any help that can be given. So far I have participated in two mud races. The first was mostly deep water and I started having fairly major belt slippage resulting in a lost of power. Did my normal thing, put it in neutral and revved it up and it went away until went through the deep water again. Pretty sure in that instance my belt was just getting wet. I'll snorkle it and hopefully that issue will go away (pretty sure it was getting in my belt exhaust).

I attended another race yesterday with two passes through fairly heavy mud with some water sitting on top (not deep enough to get in belt exhaust). During my first qualifying run, I ran out of power and assumed it was water getting in belt. It improved a little after sitting, and I was able to make some power at the beginning of the next race only to lose it as I started going through the mud again. When it was all said and done at the end of the day, my rig is in limp mode now and I am showing an overboost code as well as a fuel to lean code.

I read the Aftermarket Assassins page which discussed the overboost issue and the pulled off my electronic boost controller. Two of the lines I can blow air through but no matter what combination I try, I cannot get air in or out of the vent line. My question is should air flow through the vent line, and if It doesn't does that likely mean I need a new boost controller?

Thanks for any help.
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post #2 of 4 Old July 9th, 2019, 11:16 PM Thread Starter
 
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First Name: Jason
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Re: Tubo S and Mud problems

Looks like it was clutch related. After cleaning all the mud out and putting one of my old belts on, I rode it for about 10 minutes and the check engine light went out and after turning it off, it was no longer throwing codes.
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post #3 of 4 Old July 10th, 2019, 07:58 AM
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Re: Tubo S and Mud problems

when you hit a mud pit, and hold your foot down to the floor, the machine will start to lose power, most folks call it "powering out". this is because while you are in the throttle, the clutch is continually upshifting. you are under so much load in the mud pit, that as the clutch continues to upshift and gain gear ratio, the engine wont be able to pull such a high gear ratio, putting a ton of load on the clutch and belt, and slowly bog the engine down. the longer you stay in the throttle, the more the engine will bog down. this is just a poor performing clutch, and cant be expected to work "perfectly" for mud pit racing. you unfortunately have the wrong machine for a mud pit racer. the turboS is geared VERY VERY tall, way too tall for a mud machine and pit racing. also holding the brake and gas at the same time trying to "boost" the machine up off the line can and will cause the overboost codes.

at first as i read your first post it sounded a lot like you just got the belt wet, then i realized what you are doing and i think it could have been a combination of getting the belt wet, and also just a poor performing clutch. you have a lot of negatives against you with that machine and pit racing. (1) trans is geared too tall (2) trans is geared way too high for mud tires and heavy loads (3) your stock clutch is not a very good clutch at holding the proper gear ratio under heavy loads such as mud and aggressive full throttle.

make sure you are water tight, add a lot of spring rate to the clutches and some adjustable weights and you can make it slightly better, but with such a high geared trans i dont look for it to ever be perfect for pit racing. we wouldnt run that gear ratio in any of our pit race machines, i work with a tremendous amount of pit racers, and have figured out what it takes for mud pit racing, and unfortunately that tall gear trans isnt going to be my first pick for what you are doing.
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post #4 of 4 Old July 10th, 2019, 09:43 AM Thread Starter
 
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Re: Tubo S and Mud problems

Thanks for the information. I didn't know about the issue with loading the clutch on takeoff. It definitely was more than being to high geared. Even when I stopped and put it in low range it was significantly underpowered from normal. It's more like a short course (jumps barrels, 180's) with mud pits that you can get a run at. I am running the stock tires due to the nature of the course. One of the pits you can get a pretty good run at an nearly skip across the entire pit. I am going to get a snorkel and work from there.
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