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Anler

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10 hours ago, Anler said:

Reports are out that the 900 turbo is giving the 850's fits! Pretty awesome machine!

 

Not that surprising actually.

From Amsnow

It’s important that we compare not only the peak HP, but also the overall HP and TQ curves of these two engines in graphic form when comparing data. We did this as tested at the DTR facility at 1000’ altitude. First, let’s compare midrange horsepower and torque. The small but mighty turbocharger on the ACE builds boost instantly with no discernable lag which creates a whopping 143.5 CHP and 116 LB/FT at 6500 RPM where the ETEC 850 makes only 116.7 CHP and 94.3 LB/FT. Granted, some riders don’t spend a lot of time in the midrange wide open, but trail riders who run corner to corner say they enjoy this sort of flat torque and horsepower plateau. 
 
It is also important to note that while the ETEC 850 enjoys a 3.5 peak HP advantage over the Ace 900 Turbo, according to our data, it’s only in a small window from 7600 to 7900 rpm—above and below that, the Ace 900 Turbo’s over-rev and under-rev HP is higher. That equates to great performance from this new 4-stroke without the necessity of spot-on clutch tuning. And if operating revs are perfect in the morning, as the temp rises during the day, both engines’ revs will surely drop some due to the loss of HP in the warmer, less dense air, with lower oxygen content. Loss of revs on the ETEC 850 might cost further HP, but would be less noticeable on the ACE Turbo.
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