I hear you Eric on the more controlled controller, but BullyDog hacked the ECM in the ETEC which is a much more sophisticated Controller. There are some very smart people that will be working on this.
850 Engine thread (840cc)
- Thread starter mountainhorse
- Start date
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Spaarky
Well-known member
Boondocker has already promised delivery dates. Rumorville was we would see a Sidekick in the accessory catalog with some sort of dealer install option. I have a feeling some smart cookies are already ahead of the game.
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Ratchit
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I haven’t rode one yet but looking and measuring engine components says it’s stout, strong and built for reliability.
The crank is longer(more volume) with beefed up bearings. Longer means bigger transfer ports(more hp & tq). Reeds are further back( more volume), different throttle bodies, cylinder height is just under 1/2” vs 800 ( more volume), exhaust port and aux ports are higher ( more hp & tq). From what is seen, it says more tq and hp that would be easier to mod for more power ( ports and case). Built to turbo and I bet the Polaris guys have many logged on miles. Can’t wait to get these . Gonna be a looooooong summer
Did you get a CtC distance measurement on the rods? How about the piston skirt to pin distance??
I'm pretty sure the rods are 5mm further apart than the 800.
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Ratchit
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CtoC about a 1/4” more then 800 ho +/-
Compression height of piston is higher then 800 ho. As for skirt length from centre of pin to bottom of skirt? I don’t know as I’m more concerned about cylinder then piston on that part
Only a matter of time, the feds have been after the aftermarket tuning companies in the automotive world for a few years now.
Some early F1 engines were around 1400hp/300lbs. That’s based off calculations though since they didn’t have a dyno that could measure above 1000hp.
Single ring gets oil properly to both sides 2 ring does not. Single ring is much stronger and ring lands are stronger. Plus if they were ever going to offer a factory turbo single ring will be much better. Polaris piston issues were more piston design, pistons collapse, fuel map, lean oil ect.
I suppose it makes since to figure power to weight based on total vehicle weight not just motor weight. (Cause what good is the motor alone)
So if this thing weighs 418lbs (don’t remember) and 168hp then
Snowmobile 2.48lbs/horse
Zuk gsx-r 1000r 1.9lbs/horse (380lbs 199hp)
Caparo T1 (Currently the highest power to weight production car u can buy)
2.11lbs/horse 1,213lbs 575hp
Snowmobile is a pretty close contender. And the highest fun factor imo.
Add rider weight to that and the car gets closer.
Cant rider dry or with out a rider
“Can’t rider dry”? so many ways I could go with that! But I won’t lol
In every article, write up or spec sheet they seem to use dry weight riderless prolly cause there’s to many variables, like gas/fluid amounts rider gear rider weight and so on.
Basically the better number dry no ridder will still be better number...
Yes no?
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JJ_0909
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Just want to point out that this ECU is still a far cry off of the modern automobile ECU in terms of overall complexity. Guys have been hacking ECUs in the car world (and continue to do so).
It may be a little harder, but my guess is its no harder than the Doo ECU. Time will tell. Its all just 1s and 0s anyway right?
To just get a number for comparison, dry with no rider is the best way to go. It's just not a real world number. As for the can't rider dry I left that out there for fun. The new engine looks promising and should be a good improvement. The bar gets raised again. For fun think about this if Polaris sells 1000 of these engines and .5 % fail, how does that play out on here. Just ask Ski-Doo and their clutching. Those 50 engines will look like 500 and all hell will be breaking loose, laws suits started and thread after thread of how bad Polaris is. When in reality their quality is at 99.5 %. That's one other reason along with EPA they may leave a little power on the table. As soon as you hack a ECM install after market parts, see ya later warranty. Now we can see the full potential of the engine.
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snowmobiler
Well-known member
not a good start with the norway demos
As far as product quality and the hype that gets reflected on forums and such;
There’s something to that. Look on all the forums, all brands, the Polaris section has far more trouble shooting threads. Could that be cause they sell more...I suppose. Type in “polaris snowmobile 800” in any classifieds site anywhere and 7 out of 10 sleds for sale with under 4,000 miles are gonna say “new motor” or “new top end” 4 out of 10 with under 2,000 miles. I don’t know sales numbers but if brand A sells 40% more blah blah blah. Time will tell how this 850 stacks up?
EPA complianc??
Did anyone hear if this motor met EPA compliance?
I was told by someone supposedly in the "know" this motor does not pass... If this is true is polaris using credits from other engines across the company to be able to sell a limited number of these and that is why they are limited production?
If there not epa compliant it might be great because now they may be a better setup.
Did anyone hear if this motor met EPA compliance?
I was told by someone supposedly in the "know" this motor does not pass... If this is true is polaris using credits from other engines across the company to be able to sell a limited number of these and that is why they are limited production?
If there not epa compliant it might be great because now they may be a better setup.
Everybody that I know who rode the new 850 raved about the motor. That is around 20 guys at this point. The motor has great linear power and whipped all of the modified 800s that it was paired against. As much as they all went on about the motor, they loved the new front end even more. I don’t know what happened with the Norway sleds nor do I necessarily believe it. We will see next year but I believe that the 850 was is going to be great. For the record, I have had multiple Polaris RMKs over the years with various modifications that including one turbo and I never had an engine failure. Not one. My one Cat burned down about every ride.
