New ECU for dragons

[gordo907]

Dropped my sled off at the dealer on sat to get my d8 flashed back to the orginal 2010 flash, the 1/14 flash runs like garbage. service man was telling me that polaris has sent them a handful of new computers to try on the sleds depending on your injector color, has anyone heard of this or tried this. dont know weather i should go back to the original 2010 flash or try this new computer? thanks for the input guys

p.s. thoughts go out to all the people in revy!!!

 

[Cardiac Kid]

Took my sled in and thought I might be getting a new ECM. The details were very sketchy and he told me about it almost 3 weeks ago and just called. But on review he said they are for riders in the 2000 ft elevation and lower so he isn't putting one on my sled now as far as I know. Something is afloat here.

 

[steepndeep800]

they are sending out new ecu programs for sleds at below 2000 ft of elevation to try on sleds that are having problems. Suppose to have another new flash.

 

[deepdiver]

Ever since the 2010 update my sled ran like crap..what i mean is that it would not pull the RPM's it needed to get into the sweet spot of the power band. I tried multiple things to which noe did any good.

Finally I went to Kurt at Fastrak...after a different spring in the secondary, delrin washer and a different helix....I then put the stock spring(a fresh one) back into the primary and went back to my original weights...All I can say is WOW! IT came to life again..pulled a 100o ft climb in 3plus feet of fresh somewhat heavy snow and the RPM's were solid the whole way! That was the biggest issue I had...that doesnt mean that this is anybodys issue.

Some peoples thoughts are that with the 2010 update the compression is lower and that a heavier rider will notice a loss of power. I am 6'3" at 245 plus gear..so an easy 275.

More than not it seems that so many of these sleds have similar issues that are quite diferent from one to the next.

My thought was about "quality control" and consistancy of the components in the fuel management systems.

Side bar..I measured a used stock dragon spring(black with white) it was just barely above the top end of spec as far as the measurement goes. A new one was even longer by a bit! Brand new and doesnt meet the published Polaris specs from their shop manual..this I dont understand.

 

[SnoKing]

Experimental ECU

they are sending out new ecu programs for sleds at below 2000 ft of elevation to try on sleds that are having problems. Suppose to have another new flash.

They have 2 installed here in the "flat"' lands (under 2000 ft)

Both have performed very well

 

[diamonddave]

Ever since the 2010 update my sled ran like crap..what i mean is that it would not pull the RPM's it needed to get into the sweet spot of the power band. I tried multiple things to which noe did any good.

Finally I went to Kurt at Fastrak...after a different spring in the secondary, delrin washer and a different helix....I then put the stock spring(a fresh one) back into the primary and went back to my original weights...All I can say is WOW! IT came to life again..pulled a 100o ft climb in 3plus feet of fresh somewhat heavy snow and the RPM's were solid the whole way! That was the biggest issue I had...that doesnt mean that this is anybodys issue.

Some peoples thoughts are that with the 2010 update the compression is lower and that a heavier rider will notice a loss of power. I am 6'3" at 245 plus gear..so an easy 275.

More than not it seems that so many of these sleds have similar issues that are quite diferent from one to the next.

My thought was about "quality control" and consistancy of the components in the fuel management systems.

Side bar..I measured a used stock dragon spring(black with white) it was just barely above the top end of spec as far as the measurement goes. A new one was even longer by a bit! Brand new and doesnt meet the published Polaris specs from their shop manual..this I dont understand.

Totally agree on the helix. IMO, the sled can't pull the stock helix. Mine was replaced after 12 miles.

 

[thefullmonte]

Ever since the 2010 update my sled ran like crap..what i mean is that it would not pull the RPM's it needed to get into the sweet spot of the power band. I tried multiple things to which none did any good.

Finally I went to Kurt at Fastrak...after a different spring in the secondary, delrin washer and a different helix....I then put the stock spring(a fresh one) back into the primary and went back to my original weights...All I can say is WOW! IT came to life again..pulled a 100o ft climb in 3plus feet of fresh somewhat heavy snow and the RPM's were solid the whole way! That was the biggest issue I had...that doesnt mean that this is anybodys issue.

Some peoples thoughts are that with the 2010 update the compression is lower and that a heavier rider will notice a loss of power. I am 6'3" at 245 plus gear..so an easy 275.

More than not it seems that so many of these sleds have similar issues that are quite diferent from one to the next.

My thought was about "quality control" and consistancy of the components in the fuel management systems.

Side bar..I measured a used stock dragon spring(black with white) it was just barely above the top end of spec as far as the measurement goes. A new one was even longer by a bit! Brand new and doesnt meet the published Polaris specs from their shop manual..this I dont understand.

It would be a good idea for polaris to have more than one ecu setup if they can't get the current setup to compensate enough for extreme elevation changes.
As for springs, it doesn't surprise me one bit that they are not within specs. If they can't build a motor within specs why would the springs be? Switch to team or SLP springs right away. Better tolerances and they seem to last a long time.
Hey DD, I question your comments about the stock helix. Why don't you think this motor can pull that? I'm just curious. It's making my head hurt wondering what you meant by that.
I know people running 38 finish angle helixes that are working great. Last year I was running 58/42-.36 with a 160-280 spring and it could pull it with no problem. It all came down to what your primary setup was doing. I prefer to get the most out of my primary and then worry about the secondary.
Not to get off topic, I am just interested as to what you and deepdiver changed.
I know a lot of people who like a really steep initial angle, but that has more to do with riding style and not the motors ability to pull a certain helix.
Thanks

 

[Ron]

The steep initail angle has more to do with loading the motor properly at initial running. The clutch and engine torque need to shift up or you get excess track spin and reduced performance-at least that's the case at elevation. You can gain 1-2 sled lengths in acceleration.

 

[2mileshigh]

Ever since the 2010 update my sled ran like crap..what i mean is that it would not pull the RPM's it needed to get into the sweet spot of the power band. I tried multiple things to which noe did any good.

Finally I went to Kurt at Fastrak...after a different spring in the secondary, delrin washer and a different helix....I then put the stock spring(a fresh one) back into the primary and went back to my original weights...All I can say is WOW! IT came to life again..pulled a 100o ft climb in 3plus feet of fresh somewhat heavy snow and the RPM's were solid the whole way! That was the biggest issue I had...that doesnt mean that this is anybodys issue.

Some peoples thoughts are that with the 2010 update the compression is lower and that a heavier rider will notice a loss of power. I am 6'3" at 245 plus gear..so an easy 275.

More than not it seems that so many of these sleds have similar issues that are quite diferent from one to the next.

My thought was about "quality control" and consistancy of the components in the fuel management systems.

Side bar..I measured a used stock dragon spring(black with white) it was just barely above the top end of spec as far as the measurement goes. A new one was even longer by a bit! Brand new and doesnt meet the published Polaris specs from their shop manual..this I dont understand.

What helix did you go with?

 

[simnil]

Have been complaining for a long time that my Assault makes 600cc-power and last week i got the new ECU. Rode it about 50km on friday, did not make any more power but all the stumbling was gone. Sadly in the afternoon the engine "exploded", crank, case and cylinder are now heading for the recycling bin.

Soo, since the engine evidently was on its last breath I couldnt really say if the new ECU will make more power, (and perhaps we got a different map here in Sweden), hopefully the warranty claim is handled fast so I can ride it a few more times this season. At least I will be able to sell it with a brand new engine next autumn.

 

[rydningen]

Got the new ecu installed a week ago and have put 300km on the sled since then. Compared to the latest flash i had done(which was TERRIBLE) there is a great difference!
The mid-range stumble is gone and the sled picks up rpms faster, before when I went from full throttle, down to about 6000rpm and back to full throttle it would stumble real bad and use ages to get rpms up ....this is now gone
I Run from 0-2500ft.

I can admit that the power from the D8 was not as good as i had expected, but this was before I had the new ECU installed...I still think it lacks alittle power on top but Im not complaining anylonger