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Yamaha mountain max turbo

Old 06-13-2011, 11:01 AM
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Default Yamaha mountain max turbo

Anyone turbo one of these sleds? I bought a kit made for a viper but came with an ebay turbo. I'm going to use an RHB5, the engine is a 700cc 2 stroke triple, I have plumbing, airbox, oil and fuel pump already, just need to build a few more parts that the other guy did wrong. Anyone done this before?
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Old 06-15-2011, 09:25 PM
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turbo on a 2 stroke? you may want to research it a bit more as i dont think its possible.
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Old 06-17-2011, 08:29 PM
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it can be done. do you have a boost referenced fuel regulator? Where are you located? There is a guy in NH near me that is very good with two stroke turbos. He recommends the aeromotive regulator. My understanding is you need a BIG turbo for a triple. I have heard a single pipe will work better too.
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Old 09-20-2011, 07:07 AM
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Yes there are many 2 stroke snowmobile turbo kits like boondocker. MCXpress also has built turboed 2 strokes as well, I've only seen one of their setups on line though. I'm located in Canada, I know it's been a while since I've been on this site, I'll tell you what I'm doing though. I need a rising rate reg for sure, that's one thing the guy I got the kit off did wrong, I'll look for an aeromotive. Since I need a turbo lube circuit, I'll need to find out how many amps my stock stator can handle, to run electric fuel & oil pumps, they were included in the setup I bought. I'm trying to think of a way of driving a mechanical oil pump, maybe off the oil injection pump drive, ever seen that done? I won't be using the IHI turbo after all, it's not big enough and is not ball bearing, trying to find a Garrett GT28 from a nissan, their few & far between though for a used one. I've been in touch with a guy in the eastern states that is a retired turbo engineer, smart guy, he's turboed a few Polaris sleds, says triple pipes will work, I have had others say single is the way to go, I'm going to try my triple PSI pipes and see how it works. Any idea's are welcome.
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Old 09-20-2011, 07:48 AM
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what if you run the oil for the turbo off the stock oil pump and premix the fuel? Run the outlet from the turbo back to a small tank and circulate it, not sure if you will need a cooler? MIght not work for trail but I have seen it on race sleds.

aeromotive works well 1:1 i think is common
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Old 09-28-2011, 08:43 AM
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I've heard of using the oil injection pump for the turbo lube circuit, but it has to be a ball bearing turbo since the pump can't supply volume/pressure for a journal bearing turbo. I've also heard that some guys just fill the cavity on the BB turbo's with a good synthetic oil and change it once in a while, this works because of having liquid cooling for the turbo. I'm still on the hunt for an affordable turbo, now I've found out that a bigger turbo is required for an engine with triple pipes, I think a Garrett gt2860r or 2871 will be what I need. I'm thinking of picking up a "china charger" since it will only be running 5-7 PSI of boost, a cheap turbo should be fine. Anyone heard of EMUSA turbo's? are they any good? they advertise a "TCB 28 SR" that is advertised as a dual ball bearing unit with similar specs to a Garrett GT2860r however the EMUSA site has no buttons or even a "contact us" link.I guess you have to order from a retailer?
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Old 10-07-2011, 03:13 PM
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of the topic here but wouldnt it be easier to swap in a 4 stroke engine? theres gotta be a lot of newer ones around
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Old 10-12-2011, 10:31 AM
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Wouldn't be worth swapping in a 4 stroke, might as well just buy a sled with a 4 stroke in it already. I've got almost everything I need so there's no point stopping now. A 4 stroke swap would be way more work, more weight and would need so much modification it would be like building a new sled.
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Old 10-14-2011, 08:39 AM
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fair enough... post the pics already. want to see this...
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Old 10-24-2011, 02:40 PM
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O.K. I think I've got a few here for you. I haven't got it on my machine yet since I need some more parts, main one being a BB turbo, but this gives you an idea of what it looks like. In the pictures it's on a Viper the guy I bought it off had it on
Attached Thumbnails Yamaha mountain max turbo-turbo-vip.jpg   Yamaha mountain max turbo-turbo.vip2.jpg   Yamaha mountain max turbo-turbo.p3v.jpg  
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