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Polaris: TURBO Turbo discussion for Polaris aftermarket turbo sleds
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  #1  
Old 03-13-2018, 08:48 PM
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Default Silber Turbo AXYS, oil light/low rpms

Guys,

I'm not sure where to start with this..

Sled: 2017 RMK Pro 800 155"
Silber turbo @ 5psi (non intercooled)
IS turbo 3 clutch kit
SLP torque arm

I had the sled dialed in, pulling 8350-8400 all day a few weeks ago. I had the clutching dialed in for the elevation I usually ride, so that's not it.

Now, It pulls 8050-8150.. doesn't feel nearly as strong...and on longer pulls, the oil light comes on. (not the check engine light) This is a new thing, idk what it could mean?

I made sure it wasn't because of low oil, I topped the oil tank off.

Sled feels like it still has good compression, but I haven't checked #s yet.
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Old 03-14-2018, 08:41 AM
JJ_0909 JJ_0909 is offline
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Quote:
Originally Posted by snowracer21 View Post
Guys,

I'm not sure where to start with this..

Sled: 2017 RMK Pro 800 155"
Silber turbo @ 5psi (non intercooled)
IS turbo 3 clutch kit
SLP torque arm

I had the sled dialed in, pulling 8350-8400 all day a few weeks ago. I had the clutching dialed in for the elevation I usually ride, so that's not it.

Now, It pulls 8050-8150.. doesn't feel nearly as strong...and on longer pulls, the oil light comes on. (not the check engine light) This is a new thing, idk what it could mean?

I made sure it wasn't because of low oil, I topped the oil tank off.

Sled feels like it still has good compression, but I haven't checked #s yet.
Few ideas...(I work for Silber)

I am yet to hear of one customer have this low oil light issue (as in the light comes on and it points to some other issue)

  • Check your primary clutch spring. It may be broken or fatigued.
  • Look at your exhaust valves. Clean them.
  • The low oil light is concerning and points to a possible electrical gremlin somewhere. This can be a pain to pinpoint.
  • Go plug your machine into digital wrench. There may be a code that shines some light on this.
  • How is the bottom end? It could be a boost leak (unlikely based off what you are describing)
  • Go ahead and look close at the oil lines. Make sure you aren't leaking somewhere (to the motor, turbo, etc)
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Old 03-14-2018, 10:20 AM
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Does the RPM only drop while the oil light is on?

Check your EV cable and then actually pull them out to inspect.
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Old 03-14-2018, 08:15 PM
southshore southshore is online now
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My oil light comes on too, mainly because my sleds pointing at the sky. Love my Silber
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Old 03-23-2018, 10:30 AM
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Quote:
Originally Posted by AKFULLTHROTTLE View Post
Does the RPM only drop while the oil light is on?

Check your EV cable and then actually pull them out to inspect.
Sled has good compression, I haven't really dug into much else though, but I plan to this weekend.

This past weekend I was riding at about 6,000', temps were just below freezing.

On a straight stretch, at WOT, the sled would pull about 8000rpms most of the time, and then a couple times, it would pull 8250. WTF.

I attempted a long/steep side hill, a lot of throttle chopping, and after maybe 30 seconds or so into the side hill, I could feel the sled cutting out bad...the oil light was on, and the sled nearly died out, which forced me to turn out. The best way I could describe it: it felt like a dirt bike that was running wayyyy too rich and bogging out.

The oil tank was full, so IDK why the oil light is coming on... is it possible there is too much vacuum/cap isn't venting properly, in the oil tank and the engine isn't getting enough oil?
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Old 03-23-2018, 11:25 AM
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Well I would check you exhaust valve system over good. I have heard reports of sleds detuning while oil light is on but no real evidence. Guessing it has nothing to do with it but possible. Makes sure the wires going into that sensor are not messed up.
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Old 03-24-2018, 05:35 PM
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Originally Posted by AKFULLTHROTTLE View Post
Well I would check you exhaust valve system over good. I have heard reports of sleds detuning while oil light is on but no real evidence. Guessing it has nothing to do with it but possible. Makes sure the wires going into that sensor are not messed up.
is it possible to inspect/clean the EV guillotines, without using the digital wrench to relearn?
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Old 03-25-2018, 01:11 PM
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yes just don't disconnect the cable. if you want to do it on the bench just take the whole assembly out as a whole. their are good detailed posts on the proses in the axys forums and I think they have picts to
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Old 03-25-2018, 06:31 PM
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Originally Posted by sumtinwong View Post
yes just don't disconnect the cable. if you want to do it on the bench just take the whole assembly out as a whole. their are good detailed posts on the proses in the axys forums and I think they have picts to
awesome, thank you!

just FYI, compression #s are:
PTO side: 115
Exhaust side: 118
engine was at operating temp.
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Old 03-26-2018, 09:16 AM
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Old 03-29-2018, 09:09 PM
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Old 04-09-2018, 08:31 PM
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Old 04-09-2018, 09:08 PM
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Old 04-14-2018, 08:29 AM
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Old 05-01-2018, 11:47 AM
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Old 05-01-2018, 09:44 PM
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Old 05-01-2018, 10:19 PM
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Old 05-14-2018, 01:52 PM
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