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Yamaha: 2-stroke Includes all Yamaha 2-strokes, Viper, Mountain Max, etc
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  #1  
Old 10-17-2011, 10:31 PM
yamaha3 yamaha3 is offline
Currently: trying to turbo the mtn max
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Default Turbo Mountain Max

I had this thread in the yamaha boosted section but I figured that alot of you guys might not jump over to that since you probably dont have a boosted sled.

I have seen other threads on here and on other sites that people are wondering if this is possible. Based on other threads and things that I have heard it is possible. I have heard that Dan Richter had a turbo mtn max in thunderstruck 3 and one of the earlier mountain mod mania videos, i personally have not seen any of them. Everyone on these other threads have said that they are going to do it and have already started, yet they cannot seem to post a picture.

Earlier this summer I decided that I was going to try it, so I started finding the pieces I was going to need. I mounted the turbo right off of the manifold where the three ports go into one. From there

Turbo - off of a 2002 Subaru WRX. (TD04 13G)
Intercooler - top mount off of a WRX
Exhaust - pipe done by myself ran into an SLP can
Intercooling piping - I pieced everything together (turbo to intercooler and also the piping I ran for the fresh air.

As far as jetting what I have read from other people that have turboed carbureted 2 strokes they use power jets. I havent quite figured out what I am going to do. More than likely I am going to use the power jets. I am also looking at different options that I have for fuel pumps.

The turbo is liquid cooled so I am going to tie that in with the coolant lines. I am thinking that I will take the carb warmers out since I have never used them and I will use those lines to do the cooling.

Now the trickiest part of the whole thing besides tuning will be oiling the turbo. I will have to have a catch can and a pump to get the oil to the turbo and it will be gravity flow back to the can. I have talked to some buddies that know turbos and they said an option that I might have is since that a subaru turbo is ball bearing I might be able to cap the drain off and fill the turbo with a good synthetic oil and then cap the top off and not even run a pump. They said I could probably get away with this
because it is liquid cooled. I was thinking about doing this for test puposes because if it doesnt work I would rather not have a pump laying around that is about $250.

I am hoping to be able to run it in a couple weeks as I am still waiting for a few things to get here.

Let me know what you guys think. Like I said this is all basically an experiment. I know that it is possible to turbo a carbureted 2 stroke so I thought that I would try it since no one else has posted any pictures or info on how they did it. I personally think it would be an accomplishment for myself and the people that have helped me.

Here are some turbo pictures



Basically everything is plumbed that I will need with the exception of a few things.


This is a little better angle.




Here is a few pictures of the sled.

2000 Mountain Max. 700. Polaris skid. 151. SLP can. 10" risers. Fly sno-x bars. nytro skis. dirtbike seat(i made the mount). 2 wheel kit that i made. metal front bumber(broke the plastic one on a tree so i made this one). Excuse the trailing arms(going to get new ones but i had to fix these last year a couple times)












Let me know what you guys think.

Any suggestions or advice would help.

Thanks
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  #2  
Old 10-17-2011, 10:40 PM
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take the 13g and throw it in the trash.. that thing is gonna burn down in like 5 minutes, the thing is WAY to small.

not sure how the whole no pipe deal is gonna work out for you.. i see major issues with that system on a 2 stroke. also,dont use sewer connectors for your charge tube, they fail very quickly.
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  #3  
Old 10-17-2011, 10:52 PM
yamaha3 yamaha3 is offline
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I guess i dont see how the 13g is too small. I believe that anything bigger it will take way to long to spool and by the time i hit boost i will be out of RPM. I understand i still have to do some plumbing for the liquid cooling. the pipe from intercooler to carbs. as far as the charge pipes go i will see how it works and like i said this is just an expiriment. i dont know if this is going to work or not so as far as the money i am putting into it isnt a whole lot. as is sits now i have around 100 bucks, with turbo and intercooler.
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Old 10-17-2011, 11:00 PM
madmini660 madmini660 is offline
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not to bum you out but i bet your going to have to move the turbo to the end of the stock pipe and I've been told the triples need a large turbo just because of the volume of air they move compared to a twin but I think Gus from the skidoo section has turbo a yamaha mm in the past so might shoot him a pm but I always wonted to do this love the triples good luck
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Old 10-17-2011, 11:04 PM
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yeah.... a 16g the 13g's bigger brother is to small for an 800 twin.. an 800 tripple is gonna need WAY more air.. i doubt you would put anything to big on there.

the td04 turbine side is way to tight and gonna create way to much backpressure/heat and your gonna be heavily invested in pistons.
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Old 10-17-2011, 11:32 PM
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Hey man, that is my old sled isn't it!!!! You boosted my old Mountain Max, haha That is AWESOME!!!
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Old 10-18-2011, 12:07 AM
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That is cool but I bet your going to have to put the turbo @ the end. The engine may not run right. You can use a stock pipe. You might need to take off 1/2" (could be more) at the beginning of the pipe and add 1/2" to the end of the pipe. It is a 2 stroke and requires the reverberation to run right. JMHO Cool sled for sure! Good luck
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