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nw turbo

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Out again today and yellow arctic cat spring at 70 was too much. Went back to stock secondary at 90 and shaved another 1 gram off rivets. It pulled to 8900 rpms. I think I have it nailed down. Will post after tomorrows ride.

Otis

that is fantastic!!!! if you have a gram scale to weight the weights that would be ideal for us to play with...

was the 8900 on a pull or on the flats?


oops saw ty 4stroke post that said 73.4 total and 4 grams shaved off the rivets...
 
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Out today and conditions were 180 degrees from yesterday. 30 inches of new snow and temps close to 30 degrees. Wet and heavy was an understatement. The sled acted totally different. The weight of the snow pulled the rpms back down to 7700 on long uphill pulls.
Last night the clutch settings were perfect at 10 degrees with light fluffy stuff. First I had to lean out the fuel map to adjust for the temps. Fortunately I am running half race fuel so I didn't have to worry about being too lean without an AF gauge.

My conclusion after today is that I have the primary weights close and that the helix angle was too steep in the conditions. My only solution is to get the shockwave adjustable helix and have the ability to adjust for extremem conditions. I would have liked to brought the helix angle down to 45 which could have allowed me to keep up the rpms.

One final day of testing tomorrow. Snow over the windshield is such bliss. There were only 3 sleds to make the climbs today a cutler 1200, turbo M8 running full race setup, and me out of the 28 sleds in our group.

Boost I can never go back now!

Otis
 
Out today and conditions were 180 degrees from yesterday. 30 inches of new snow and temps close to 30 degrees. Wet and heavy was an understatement. The sled acted totally different. The weight of the snow pulled the rpms back down to 7700 on long uphill pulls.
Last night the clutch settings were perfect at 10 degrees with light fluffy stuff. First I had to lean out the fuel map to adjust for the temps. Fortunately I am running half race fuel so I didn't have to worry about being too lean without an AF gauge.

My conclusion after today is that I have the primary weights close and that the helix angle was too steep in the conditions. My only solution is to get the shockwave adjustable helix and have the ability to adjust for extremem conditions. I would have liked to brought the helix angle down to 45 which could have allowed me to keep up the rpms.

One final day of testing tomorrow. Snow over the windshield is such bliss. There were only 3 sleds to make the climbs today a cutler 1200, turbo M8 running full race setup, and me out of the 28 sleds in our group.

Boost I can never go back now!

Otis



rare air when you are one of three that can make it....great job!!!
 
I'm back from Togwotee and testing the NW turbo. I was the first to install the new system as a consumer and not a shop or mechanic. From the start this kit is awesome. No problems. Turned the key and it started everytime. Great power without a single engine related problem. I loved every second riding it and compared to stock horsepower I can never go back mtn riding without boost.

My personal feedback on the system is two thumbs up. The turbo makes awesome power, is easy to install, Travis is a fantastic guy and has superb customer service, and the system just plain works.

I had some worries about the intake under the hood which never was a problem despite 7 days straight of riding in powder over the hood. I did pull the foam inside the left panel to open it up more, but never a studder.

The trail tank is awesome and I never used all 9 gallons of fuel (close), but the stock tank sucks in comparison. I do really hate the fasteners like everyone else and they need to get the yami fasteners back on the tank. The sled looks stock except all my mods to the tunnel, skid and front end ect. There are no visible engine mods to be seen. Total stealth.

The fuel controller is really easy to use, but I would recommend an air/fuel ratio wide band gauge. I went from -25 to +30 degrees and had to really lean it out to get the horsepower back. This made me nervous despite Travis' reassurance that the fuel controller would never let me get too lean. I ran 50/50 race fuel to make me feel better and be safe.

The clutching is still a work in progress. I lowered the clutch arms to 73.4 grams from 77.4 like was recommended and that allowed the engine to move from 7600 to 8500 rpms. I tried the yellow arctic cat spring at 70 degrees and this was too stiff and carried the rpms back down to 8200. I went back to the stock spring at 90 which was the best I could do getting 8500. The 47 degree helix was too steep in my opinion or the weights could use another 1 gram off to get the rpms perfect. I am now ordering the shockwave adjustable helix to get it perfect. When it was 10 degrees I hit 8500, but at 30 degrees I was back down to 7700 in heavy wet snow. I can't see another solution but to have the adjustable helix to compensate for different snow conditions.

So far I love it and don't see another company with more bang for your buck. In a couple of weeks I will be back to finalize tuning with the shockwave.

Otis
 
Now that people have finished another season and getting ready for the next. What are you guys doing to make these turbos go farther and faster and how are they holding up. I just picked up a sled with one on and want to get the most out of it.
 
Not too much talk about NW Turbos lately. Of course it is summer. Apparently the Nytro kits they produced are going to be sold by someone else.
 
It can with an attitude fuel controler and and AEM A/F gauge. What A/F ratio is the max I can tune my motor to.
 
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