DamonJones
Extreme
First I'd like to introduce myself on this board. I live in the pacfic northwest and have been riding for 4 years now. My passion is powder and boondocking. Not much of a climbing or jumping guy. Last year I purchased an 08 Nytro MTX. I absolutly love the sled but it's time to start making changes. 
I have spent the past few days reading the forums here and have to say I'm really impressed. I have been able to answer a ton of questions about my nytro but now have a bunch more.
First on the list is the Nytro front clip. Bounced it off a tree the other day and was shocked to see the damage. I understand that the 09's have an upgraded front clip. I have already fixed the origonal one but if/when this happens again I'll be upgrading. QUESTION: How are the new ones holding up? Could they use any more strenghening, if so where?
The next mod I will be doing is Snow eliminators. Saw a nice post on that here. QUESTION: How do you like them? Are they unconfortable to stand on for long periods? Do they come with rivits? if not what size/type are you using?
Concurrent with the eliminators will be the removal of the sway bar and the addition of Fox Float 2 shocks. Again saw a number of posts on this one. QUESTION: This seems to be the go to setup for powder hounds and boondocking. Any comments? Do the Floats compensate for the sway bar on the trails? Trails are last on the performance list but always a concern.
Now the biggy - next summer I'm considering boosting the sled. Based on my riding profile and a number of other reasons I've decided that MPI stage one SC is what I'm going to do. (Please don't turn this into a turbo vs SC post, I've done all the reading on both). So I downloaded the boostcalculator spread sheet and started playing. Here is what I want from my sled. Low maintenace, reliable, 92 octane pump gas, over 200HP at sea level. My take would be 11 pounds of boost with .08 head shim. QUESTIONS: Is that a realistic head shim? Will the cams need adjusted with that shim? I calculated at sea level for worst case octain ratings, I normally ride at 3000 - 7000 feet. I figure that is my saftey and reliability magin. Feedback on that? Is there anything else I will need for this config not included in the MPI kit? Recommended clutch changes for this config?
I'm sure I'll have many more questions but lets start with these. Thanks in advance for your input.
I have spent the past few days reading the forums here and have to say I'm really impressed. I have been able to answer a ton of questions about my nytro but now have a bunch more.
First on the list is the Nytro front clip. Bounced it off a tree the other day and was shocked to see the damage. I understand that the 09's have an upgraded front clip. I have already fixed the origonal one but if/when this happens again I'll be upgrading. QUESTION: How are the new ones holding up? Could they use any more strenghening, if so where?
The next mod I will be doing is Snow eliminators. Saw a nice post on that here. QUESTION: How do you like them? Are they unconfortable to stand on for long periods? Do they come with rivits? if not what size/type are you using?
Concurrent with the eliminators will be the removal of the sway bar and the addition of Fox Float 2 shocks. Again saw a number of posts on this one. QUESTION: This seems to be the go to setup for powder hounds and boondocking. Any comments? Do the Floats compensate for the sway bar on the trails? Trails are last on the performance list but always a concern.
Now the biggy - next summer I'm considering boosting the sled. Based on my riding profile and a number of other reasons I've decided that MPI stage one SC is what I'm going to do. (Please don't turn this into a turbo vs SC post, I've done all the reading on both). So I downloaded the boostcalculator spread sheet and started playing. Here is what I want from my sled. Low maintenace, reliable, 92 octane pump gas, over 200HP at sea level. My take would be 11 pounds of boost with .08 head shim. QUESTIONS: Is that a realistic head shim? Will the cams need adjusted with that shim? I calculated at sea level for worst case octain ratings, I normally ride at 3000 - 7000 feet. I figure that is my saftey and reliability magin. Feedback on that? Is there anything else I will need for this config not included in the MPI kit? Recommended clutch changes for this config?
I'm sure I'll have many more questions but lets start with these. Thanks in advance for your input.
otis
Expert
I can answer a couple of questions.
First the powder hounds are great in the deep. They are wider than the original skis and have better flotation and are lighter. In order to help them from darting I added a deeper keel with the ski savers from bergstoms and triple carbides which keep really good trail manners.
Second about the floats. I run the original floats with the air reservoir and they are great. They need to be run at 40psi with the sway bar and about 75psi without it. The additional air helps keep the sled from being too tippy and keeps trail manors reasonable, but on the trail it's much more stable with the bar. I only powder ride and boondock and it's much easier to get the sled up on one ski without the bar so for me the sacrifice in trail ride is worth it.
Lastly, the front clip is being warrantied so I would consider checking into that. If that's not an option then there is someone that is selling reinforcement plates like the 09s which is another option or you can purchase a new 09 front subframe for $390.
Good luck
Otis
First the powder hounds are great in the deep. They are wider than the original skis and have better flotation and are lighter. In order to help them from darting I added a deeper keel with the ski savers from bergstoms and triple carbides which keep really good trail manners.
Second about the floats. I run the original floats with the air reservoir and they are great. They need to be run at 40psi with the sway bar and about 75psi without it. The additional air helps keep the sled from being too tippy and keeps trail manors reasonable, but on the trail it's much more stable with the bar. I only powder ride and boondock and it's much easier to get the sled up on one ski without the bar so for me the sacrifice in trail ride is worth it.
Lastly, the front clip is being warrantied so I would consider checking into that. If that's not an option then there is someone that is selling reinforcement plates like the 09s which is another option or you can purchase a new 09 front subframe for $390.
Good luck
Otis
Re: Nytro MTX Mods & Boost Questions
Welcome Fella!
My understanding is that with the upgraded subframe, the a-arms will bend - just as it should be... unngghh!
I much prefer the Better Boards. The offer the same "fishbone" support as the factory fishbones - eliminators do not. The Nytro tunnel is very thin, the more bracing of aftermarket parts the better. They are very comfortable. As a matter of fact, with the snow that is dropped out of the bottom, they are much MORE comfortable than the stock boards.
BB's do come w/ rivits. I chose to use a "multi-grip" rivit that is much like the stock Yammi rivits that are utilized in the tunnel.
I am extremely happy with my floats and swaybar delete. I do not ride trails, but to reach our play areas. The floats helped immensly on the trail, and I am neither here nor there on the boondocking.
I have leaned heavily toward the SC, but the fuel mapping is much more intensive, and poorly backed by the sole SC kit mfr. I do not know the specifics for what you want to do, but if you get it wired... POST IT UP!
Again, welcome to the family!
-Moto
DamonJones said:
Welcome Fella!
DamonJones said:
My understanding is that with the upgraded subframe, the a-arms will bend - just as it should be... unngghh!
DamonJones said:
I much prefer the Better Boards. The offer the same "fishbone" support as the factory fishbones - eliminators do not. The Nytro tunnel is very thin, the more bracing of aftermarket parts the better. They are very comfortable. As a matter of fact, with the snow that is dropped out of the bottom, they are much MORE comfortable than the stock boards.
BB's do come w/ rivits. I chose to use a "multi-grip" rivit that is much like the stock Yammi rivits that are utilized in the tunnel.
DamonJones said:
I am extremely happy with my floats and swaybar delete. I do not ride trails, but to reach our play areas. The floats helped immensly on the trail, and I am neither here nor there on the boondocking.
DamonJones said:
I have leaned heavily toward the SC, but the fuel mapping is much more intensive, and poorly backed by the sole SC kit mfr. I do not know the specifics for what you want to do, but if you get it wired... POST IT UP!
Again, welcome to the family!
-Moto
DamonJones
Extreme
Thanks for the feedback. Just what I was looking for. Looks like the Eliminators, sway bar delete and the floats are a go for sure.
I have noticed a lack of information on the SC, that is why I'm looking for real world answers here. I'll try to contact some of the users that have done the conversion. It would seem to me that for the most part all the information related to turbos compression, cam timing, fuel mapping and the like should cross over to the SC world. Boost is boost afterall. I would think the only difference would be when and how much boost you get. The SC should be more linear then the turbo due to lag at any given RPM.
Along the line of mapping how is that done? Is the factory computer reprogrammed or is it an aftermarket computer? Does it come with the kit and absolutly required or is it just to super fine tune?
I have noticed a lack of information on the SC, that is why I'm looking for real world answers here. I'll try to contact some of the users that have done the conversion. It would seem to me that for the most part all the information related to turbos compression, cam timing, fuel mapping and the like should cross over to the SC world. Boost is boost afterall. I would think the only difference would be when and how much boost you get. The SC should be more linear then the turbo due to lag at any given RPM.
Along the line of mapping how is that done? Is the factory computer reprogrammed or is it an aftermarket computer? Does it come with the kit and absolutly required or is it just to super fine tune?
SilentSno
Expert
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- 2008 Yamaha FX Nytro MTX
Damon, sounds like we follow a similar tune. Welcome and keep us informed to your SC adventures, its where I lean towards, when the day of boost comes.
otis
Expert
Not to start the SC vs turbo wars, but you'd be in the far minority with the SC. I would argue my midmount kit has any more lag than any SC and the top end is much stronger. With the midmount the turbo is attached to the engine for instant spool up. Also with a proper waste gate and BOV the turbo is almost always spinnig to avoid lag issues.
DamonJones
Extreme
Thanks otis for your input. I know all about the differences. For me the top end is not something I care about. I'm not a high mark kind of rider. Powder and boondocking are my passion and the SC fits that order. No spin up (lag) issues or valves to mess with. Add the simplicity of not messing with the exhaust, gas tank, heat build up and various other turbo issues and the SC wins hands down. Plus I'm only looking for a max boost of 11 psi so it can be run on pump gas with just basic motor compression mods. It's the right mod for how I ride. If I was a puller I'd be all over the turbo.
For now that is all pie in the sky anyway, next year at best. So what kind of head shims (thickness) do you run? I'm still wondering if a total of .08 is reasonable.
For now that is all pie in the sky anyway, next year at best. So what kind of head shims (thickness) do you run? I'm still wondering if a total of .08 is reasonable.
DamonJones
Extreme
Well spent the first day of the new year working on my sled.
My first two modes for my Nytro are complete. I put on the Float 2's and unhooked the sway bar. I will remove it later after I ride it once. Plus I plan on putting the 09 front clip on in the near future anyway. No sense in breaking my neck now when I'll have the whole thing off later anyway.
Most of the day was spent installing the Snow Eliminators. Quite a little project. Anyone wanting to this I highly recommend aquiring two tools if you don't already have them. One is an air saw and the other is an air powered rivit gun. The rivits in the kit would be death to do by hand. As it was there was four on ech side I had to do by hand. What a pain. Anyway they look great and are much stronger then stock. I was most disappointed in the instruction that came with them however. I guess they figure that anyone taking on this project would have enough knowledge to do it correctly. A good set of instruction would have saved me a bunch of time however. It would have cut down dramatically on the planning stage and figuring what to cut where and things to watch out for.
I can't wait to hit the mountian this weekend and try it all out.
My first two modes for my Nytro are complete. I put on the Float 2's and unhooked the sway bar. I will remove it later after I ride it once. Plus I plan on putting the 09 front clip on in the near future anyway. No sense in breaking my neck now when I'll have the whole thing off later anyway.
Most of the day was spent installing the Snow Eliminators. Quite a little project. Anyone wanting to this I highly recommend aquiring two tools if you don't already have them. One is an air saw and the other is an air powered rivit gun. The rivits in the kit would be death to do by hand. As it was there was four on ech side I had to do by hand. What a pain. Anyway they look great and are much stronger then stock. I was most disappointed in the instruction that came with them however. I guess they figure that anyone taking on this project would have enough knowledge to do it correctly. A good set of instruction would have saved me a bunch of time however. It would have cut down dramatically on the planning stage and figuring what to cut where and things to watch out for.
I can't wait to hit the mountian this weekend and try it all out.
