Sidewinder Stator,Pickup Coil,Flywheel and Cover on Viper

[swampcat]

Very interesting stuff steve! Out of curiosity have you ever heard one of these engine on an engine dyno? As mentioned, starting can be hard and once they’re running it’s very hard to get them to come off of idle, they rattle very hard! I’ll see if I have any videos saved of when mine was on, they rattle bad enough that it’ll kill the engine about half the time when coming off idle.

I have started mine many times with NO clutch on it. Starts right up, VERY quiet, you can barely hear it run, Wish it was that quiet ALL the time. Throttle responce is instant, I mean crazy instant. I have stalled the engine by chopping the throttle though, as in reving it up and down. For what its worth, this is a 16.5.

 

[cannondale27]

I have started mine many times with NO clutch on it. Starts right up, VERY quiet, you can barely hear it run, Wish it was that quiet ALL the time. Throttle responce is instant, I mean crazy instant. I have stalled the engine by chopping the throttle though, as in reving it up and down. For what its worth, this is a 16.5.

Hmm another variance it seems. Wish I would have tried that.

 

[cannondale27]

Well the sidewinder flywheel IS heavier. Thats awesome! Check out first post. Updated

 

[sxr70001]

Great work Cannondale. I really hope this makes a difference. You are one of the reasons this site is the best snowmobiling forum out there.

 

[STAIN]

Good work. I believe this will be the cure to what you are looking for in terms of startability and idle quality. The performance gains will be a bonus.

Making them better is half the fun

 

[cannondale27]

Today is the day. Sidewinder hose fits perfectly. I kept the heatshielding on it which Winder doesnt use.

Trying the wrap again since Swaintech Ceramic Coat all fell off. Sprayed it with the Silicone Coating this time though. Put this and can on and ready to fire it. Admit being nervous on this one!

 

[swampcat]

Good luck Steve, I am rooting for ya. I see 110 in your future.

 

[hibshman25]

Really anxious to see if the starting is improved.

 

[cannondale27]

Well with Sidewinder pickup hooked up it will start and run for about 20seconds real nice then it shuts off and wont start again. Hookup Viper pickup and it starts and runs excellent. So I gained 7oz on flywheel. Any ideas? Seems ecu doesnt like the Winder pickup.

 

[Mtnviper]

Steve, I wonder if it's a situation where you have a Hall effect vs an inductive sensor signal? (digital vs analog) If there is a difference, I would think that the Sidewinder would be Hall effect as it tends to be more accurate and that is what manufactures are trending toward.
Hall effect (digital) signals are a square wave signal and do not like variations (such as free play in stub shaft splines. This would also explain why the Sidewinder is timed off of the flywheel.
As for why it would start if it is the wrong type of signal, it's possible that the ECU does not look for a crankshaft signal until after the engine is running. At that point it may not be seeing the proper signal and shut down. I would think that it would set a code though.

Bill

 

[cannondale27]

Steve, I wonder if it's a situation where you have a Hall effect vs an inductive sensor signal? (digital vs analog) If there is a difference, I would think that the Sidewinder would be Hall effect as it tends to be more accurate and that is what manufactures are trending toward.
As for why it would start if it is the wrong type of signal, it's possible that the ECU does not look for a crankshaft signal until after the engine is running. At that point it may not be seeing the proper signal and shut down. I would think that it would set a code though.

Bill

Its something like that. No codes. Sidewinder is 540 ohm and Viper Pickup is 462 ohm.

 

[snowfever27]

So the electrical Sidewinder parts don’t seem to want to play with the viper electronics but the sidewinder flywheel (7 oz. heavier) maybe a winner?

 

[Mtnviper]

That's pretty close in resistance. If they are both 2 wire sensors then they should be analog sensors. Another possibility could be reluctor wheel tooth count. If the tooth count is different between the stub shaft and flywheel, it could be sending a signal to the ECU that it doesn't like. If this is the case, I would think that the tach would be off for the short duration that the engine runs though.

 

[cannondale27]

The specs for both the Winder and Sidewinder pickup are 336-504 ohm Sidewinder is out of spec. Dont know why.

 

[cannondale27]

That's pretty close in resistance. If they are both 2 wire sensors then they should be analog sensors. Another possibility could be reluctor wheel tooth count. If the tooth count is different between the stub shaft and flywheel, it could be sending a signal to the ECU that it doesn't like. If this is the case, I would think that the tach would be off for the short duration that the engine runs though.

But it will run for a bit.