not really. snappier low end for sure tho.
REALLY!!!
- Thread starter TallCan
- Start date
Lets keep it civil in here people... PLEASE !
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I told NoNo he had a crappy education and he said I was ignorant lol. Pretty tame stuff for the internet. Oh and Chadly said I was old, fat and rode meadows. We say WAY worse face to face!
So more power is always more power. Just because they have the same peak power doesn’t make them equal. If you gear down to try make up for it you’ll have less track speed all the way thru the range. We may have bad data tho. Like previous poster pointed out if the Poo wasn’t broken in not a fair comparison.
Also power to weight should be in that equation.... not to metion the diffrence in the chassies/getting power to the track...
Matte, I'm going to try one last time to explain this.
1) The poo and doo 850's power graphs are very similar. The doo graph is shifted over/down like 350 RPM lets say. It's the same curve shape though, do you agree?
2) Ok now let's talk about gearing. Doo 850 vs Poo 850 at 1:1shift ratio at their peak RPM with the same final drive ratio of 2.00. What's their track speed? Doo at 7800 RPM is running 77mph. Poo at 8150 RPM is running 81mph. Now change the gear ratio in the poo to 2.11 and it runs 77mph at 8150 RPM.
3) Think about power to the track. Lets assume the driveline efficiency of the two sleds is identical, as well as the final drive ratio. What would the comparison look like between the two on a graph? You'd have hp on the vertical axis, and RPM (track speed) on the horizontal axis. The 350 RPM shift down/over that is shown in the engine comparison graphs would be exactly the same on the track power graph. The shape of the curves relative to one another would be exactly the same as well.
4) When you gear down the polaris to match the same track speed as the doo at full shift, what happens to the track power graph? The polaris curve shifts over 350 RPM. What are you left with? The power to the track curves are essentially IDENTICAL.
So yes the Doo 850 makes more power at lower RPM, but we don't ride engines. We ride systems with transmissions and gear reductions. If they are geared for the same track speed at their peak power, they are damn near identical. What you need to look at when comparing engine hp graphs is the SHAPE of the curve and the peak power. Poo and Doo 850's have the same shape and same peak power, more or less.
interesting what you mention about gearing, the poo's are geared to tall and may be part of the reason guys say the doo has better bottom end and cat both of which are geared lower than the poo. In deep the snow a sled with a 2.2 final ratio will always feel less power than a sled in the 2.6 range. put them all at 2.6 and they should feel similar. have a Khaos on order and will be my 1st polaris, gearing the sled down like my doo will be mod #1
