Eth Mode vs. Non Eth Mode...

[G-Force]

Just trying to figure out how big a difference the rpm gain is between the two??
On both my Pro and Axys, I see some folks claiming 200-250 rpm gain? Man, I'm seeing 000-100 MAX… this is all at -5*C to +10*C…. and about 4500'…
Any input? Pro has 275 Km and Axys about 200 km, both from new..
G.

 

[Overthehood]

I'm with you, maybe 100 rpm.

 

[lurkcity]

I broke my sled in using the non ethanol setting but can only find 89 ethanol free gas near where I ride. Polaris recommends 91 but says 89 will work. Should I be running the ethanol setting? Everything seems normal but the long term effect is in the back of my head.

 

[adamg]

I found it was about 50-100 rpm on my 16.

 

[Cinno]

Performance Change with eth mode

I raced a buddy and used his sled as a control sled. We were even in ethanol mode and I walked away at maybe 3 miles per hour in non-ethanol mode. So it does make a difference. I had non-ethanol fuel in the sled.

Cinno

 

[G-Force]

MUST do something, otherwise why would they bother with it.. I just never saw an appreciable difference, myself..
That being said, first ride with the pipe and PCV, and yup, it was in Eth mode

Wonder if Jim @ DTR has ever done a quick couple pulls when he's had a sled strapped down, just for chits n grins?

 

[damx]

On the dyno it's 3-4 hp less in eth mode. If I remember correctly

 

[Solby]

Doesn't it retard(eth) or advance(non-eth) the timing?