New ski doo 850 etec turbo (summit)

srt20

srt20

Active member
snobuilder said:
Have any after market turbo kits been built to only add boost as altitude increases?
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No nobody makes a system that has zero boost at sea level.
But the really good systems read absolute psi and will keep that psi the same at all elevations. So it could be 4 psi boost at sea level and 8 psi at 10k feet. But its still making the same hp at both. Those good systems are adjustable electronically. Others will be adjustable mechanically.

Its basically the same ideas, but if I understand this correctly, doo has a diverter in the intake to bypass boost.
 
S

sjb

Member
misty_pines said:
I agree with Attack Man and the others. This would be one fun sled for riding in the mountains. It's amazing how much power a naturally aspirated engine loses at altitude. I believe it's about a 3% power loss for every 1000 feet. Just when you need the power the most (in the mountains-steep and deep) the power is down. My 165 hp Summit 850 makes only about 125 hp at 8,000 feet. I would love to have 165 hp at 8,000 feet. When going higher than 8,000 feet, this turbo still keeps it close to 165 hp (a little less the higher you go) but will make 40+ more hp than a non-turbo sled. Also, only weight 10 more pounds than a regular Summit. The only fly in the ointment for me is the $18,000 they cost...and...still no stock LED headlight!!
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Are you riding the mountains at night? Just couldn't help myself.
 
misty_pines

misty_pines

Member
sjb said:
Are you riding the mountains at night? Just couldn't help myself.
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Fair question. Not much riding at night in the mountains...but for those that might ride some trails at night in addition to mountain riding, I figured Doo would get with the times and add a stock LED headlight since they put a new lightweight hood on the sled. I'm less than impressed with the stock headlight on my 2019 Summit. Of course adding the Doo auxiliary high beam kit takes care of that, buy it would have been nice not to have to spend that extra money.
 
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