XP Turbo

[Fack]

A drag sled can see more benefit from an intercooler because the pressure loss experienced through the intercooler can be made up from heat loss as a result of the high amount of air flowing across the intercooler. When riding in the mountains or boondocking in the trees you don't see a lot of speed so the air moving across the intercooler isn't that significant. It is very hard to achieve a 1:1 ratio because of simple bends in a charge tube or backpressure put on the exhaust from a restrictive turbine housing. All of this comes into affect when designing an efficient system. The more efficient you are the more power is produced and you achieve a more consistant result. The cold air intake is hardly my idea, and most of the stuff mentioned are others' ideas. It's the combination of things that makes this work. What works on one sled may or may not work on another. All systems are not the same and all boost is not the same. My intentions are to develop a kit on the XP that works efficiently and consistantly and can still be run at relatively high boost. When I say high boost I'm talking 14-16 pounds. A 66 aerocharger with the right combination is capable of producing more on an 800, but anything above that and you start to shorten the life of engine parts and you lose a lot of reliability. I could be wrong, the XP may live under higher boost, but that remains to be seen. I'm trying to be as safe and honest as possible. I am considering buying an XP to do for myself. I was just curious to see if others were interested. I have a lot of resourses and building a kit could be very doable. Gotta let me know.

-Fack

 

[10003514]

Very interested in your kit especially at that price, was willing to pay 9g Canadian for an aero 53 but that included the install. Love to see your kit or something ready by next winter.

Keep us updated, have a good one

 

[skull]

Xp Turbo

Lets just say that Turbo Performace has done plenty of R&D on the 800R and they know were the breaking pionts are. For the 66 they run great on the XP with 791 miles at 14lbs. They are also having a preseason sale on all kits the 66 is $6395.00 and the 53 is $5500.00. Give them a call the sale is only on till May 15th. www.turboboyz.net

 

[rjm350]

vIt sounds like no intercooler might be a good way to go, but by adding 14-16 PSI to charge the air plus gathering heat from the turbo, I expect this charged air not be extremely hot? I just wonder how it will affect the fuel in the carb. I have heard other stories of hot air "boiling" the fuel in the carbs?
A quick easy way to adjust the pilot circuit to maximize bottom end was mentioned earlier. I think this is also very important. Is there another way to adjust this rather than the conventional way?

 

[brycter]

Thanks for the plug skull. We have so many hrs in our kit my wife thinks i love the xp more than her!!! haha. We have tried it all and thats why we do what we do. I can give you a ton of guys that are running our kits and they are solid. I have had all those problems happen in the above posts thats why kits cost so much because you have to learn and learn. Anybody can build a kit and anybody can install one. It all has to do with how much time you want to spend. The other thing about building kits is you have to have some customer service to go along with it. I can pretty much tell you that there are alot of guys letting there customers do the r&d themselves. But i promise that does not happen here. Call us up when you have a problem chances are we have had it happen to us and we can tell you the fix. we sold about 138 kit last year. So look at your 6g's and tell me where is the best place to spend it.

I would also like to know what we are missing on our kit? Our 66 rocks!!! With no problems.

Brycter
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[turboless terry]

I can't believe the pipe will stand up to 14-16 lbs. I had a 670 turbo running 11 lbs. and the pipe was breaking all the time.

 

[pinnedunderdoo#3]

I love my mcx nytro but its not an all around sled. Those who say the are the best boondockers are full of it or don't know what boondocking is because the nytro is heavy in the technical stuff

im glad there is at least one honest yamaha rider on snowest..... yea im going to make a forced air system for those hard core mtn riders it''ll be a huge propane tank converted over to air ill take some pvc piping make an airbok make a air connector on the pvc and every time your throttle touches the switch on the bar it will dump insane psi into your motor for maximum yamaha turbo killing performance.... just every ride fill it up with air at your local gas station good to go again... my kit will be starting at 500 dollars depends on size of tank.....

 

[Fack]

I think everyone on here is aware that turbo performance builds a kit for the XP. Like I stated earlier I feel that there is a lot left on the table for the XP. My intentions are not to bash on others' products but to simply state that there is more to be had. NOT everyone can build a kit and make it work. It is easy to make a sled run on boost but to get it to work everywhere else is not so easy. When you run a turbo in the middle of it's efficiency the charge air is reasonable. I can make several pulls on mine and put my hand on the charge tube and it's warm, but not hot to the touch. It varies but as long as you are runnnig a cold air intake it doesn't get that hot. I know when I take my inatake off and run under hood air it is dramatically hotter and the sled runs noticably worse. As far as the pipe bursting that is definately a weak point. I am considering a custom built pipe that is heavier guage just for that reason. If I build a kit it will work or I won't sell it. I'm not here to make big promises or offer one time "sales" I only want to put something out there that works and people can afford. I don't do this for a living nor would I want to. I have noticed like everyone else that there is a need for this and I want to offer a product that people are satisfied with. I'm being generous at this point by saying that other kits are lacking. They may work when the boost is on but very hard to keep consistant. Been there. Keep the info coming guys.

-Fack

 

[steve8]

A Turbo Would Be Awsome On An Xp. With That Said, All I Have Been Reading Is Guys B*tchin Back And Forth. There Have Been Some Good Ideas Thrown Around. I Would Like Some Action Starting To Happen Around Here. Maybe Some Pictures Of The Build. I Will Be Sure To Post Some Of My Build On My 06 Rev. Keep Postin Though. Everything Sounds Good.

 

[turboless terry]

the 53 series is almost undersized for the 800. We were told not to put anything on it for a filter or it will over work the turbo. You would have to with a fresh air intake.
His turbo has a little push to it after you let out of it. How do you adjust that out? Is it one of the brass screws below the boost adjustment?

 

[Fack]

The 53 aerocharger is a little small for an 800. You are limited to about 8 pounds of boost maybe 10 max on some 800"s. If you go any higher than that it overspeeds the turbo and takes the bearings and usually the compressor and rotor out. Very expensive to fix. Unless you want to run low boost I wouldn't consider it. When you say push do you mean run on? I experienced this early on and it is not fun. Kinda scary when you want to stop and the sled doesn't. If you want you can send me a personal message and we can try and work that out. As for running a filter that is not recomended on these turbos. Any time you hinder the flow of air into a turbo it has to speed up to maintain the set boost pressure. It will keep speeding up until it reaches the pre-set pressure of the controller. With overspeed being the killer and running a 53 on an 800 it doesn't take much to push the turbo past it's critical speed and wrecking it. You don't need to put a big filter on there. Running a cold air intake to a point and then putting some mesh screan to keep larger objects from entering is sufficient. I would think that would be a lot better than running your turbo open in the bottom of your belly pan injesting break dust. Can't be good for your motor. I agree that this is turning into a battle so if you're serious and have real questions feel free to send me a personal message.

-Fack

 

[Boyko]

Thanks for all the input good and bad. I wouldn't build one with an intercooler and here's why. Keeping a 1:1 ration between the intake and exhaust side is critical on a 2-stroke which means you want the intake pressure and exhaust pressure to increase equally as the boost goes up. When you add an intercooler to a system you undoubtably get a pressure drop across the intercooler which throws our ratio off. This is not a big deal on a 4-stroke motor because there is no scavaging affect taking place in the exhaust. It may not be that big of a deal with an intercooler that flows well but it does affect the efficiency of the system. Also, most intercoolers you see use air to cool the charge air inside. This works well if you can get alot of air flowing across the intercooler. I don't see how this can be successfully accomplished when your intercooler is right above your hot motor and your cruising around the in the deep snow at relatively low speed. In just a short matter of time you heat soak the intercooler and you have gained nothing but the weight of the intercooler. I would think that you a better off drawing cold air from outside the hood in the first place and not worrying about trying to cool it. There are kits out there that draw hot air from under the hood and then try to cool it with an intercooler. Doesn't make sense to me but maybe it does to someone else? Intercoolers work on drag sleds that run with out a hood and are getting a ton of air across them, but we don't see that much in the mountains. I figure cold air intake and leave it. If you could figure out a way that ran the charge through an intercooler under the tunnel that would work awesome and does on some really fast sleds, but I don't see it being done on an XP or a rev.I know there are other guys already building kits for these sleds, but like I stated earlier, I feel that there is more to be had as far as making these things consistant and more reliable. Keep it coming! All this info is great!

-Fack

Not to knock ya Fack, I think the more people doing R&D on turbos the better is is for everyone involved. I am just curious as to how many turbo kits you have designed & built from scratch and for what applications. I have read about some high-end turbo setups (indy cars ect.) achieving close to a 1:1 exhaust pressure boost pressure ratio at full boost, but have never seen anything close to that on stuff I have built or tested, what kind of magical turbo do you use to get that on a 2-stroke? A 1:1 ratio is not going to happen while you are building boost, it take energy to spool a turbo and that comes from building X amount of pressure in the exhaust first.

Just wondering what you have tested so far?

 

[Fack]

As stated before: It is very hard to achieve a 1:1 ratio because of simple bends in a charge tube or backpressure put on the exhaust from a restrictive turbine housing. All of this comes into affect when designing an efficient system. If you want to talk about this you can send me a personal message and I would be glad to talk about it then.

-Fack

 

[brycter]

I still would like to know what is left to be desired. PM me.

 

[Fack]

The kti needs a cold air intake, a way to adjust the pilot circuit without changing the pilot every thousand feet, and boots are hard enough to keep on the carbs without notching them out and drilling holes in the clamps. Also, turning the pump on and of with boost works but is not the most reliable way. If you lose a relay you most likely lose a motor.

-Fack

 

[skull]

Turbo

The kti needs a cold air intake, a way to adjust the pilot circuit without changing the pilot every thousand feet, and boots are hard enough to keep on the carbs without notching them out and drilling holes in the clamps. Also, turning the pump on and of with boost works but is not the most reliable way. If you lose a relay you most likely lose a motor.

-Fack

Fack your starting to make this post a joke!!! If you have all these grest ideas I would realy like to see your kits, post some pics. If the Turbo is mounded in the right place you wont need a cold air intake, by the way what is a pilot circuit??? are you meaning a power jet, well till they go to a EFI you have no choice. Also if your kit is done right your air box wont come off. Hats off to TURBO PERFORMANCE for there kits and customer service they have been great to work!!!!!!!!!!!

 

[Fack]

Making this post a joke? The only reason I started this post was to create something that wasn't a joke. Sure you can start your own post and claim unrealistic kit numbers, but the point is people have heard all that. Surely you've heard of a pilot jet? How do you compensate for elevation and temperature and keep the bottom end crisp and keep your turbo responsive? Anybody can adjust power jets and make these things work when the boost on, but getting the turbo to spool quickly in the deep stuff with varying altitudes and temperature changes is not as easy. Anyone who has ever ran a carbed turbo has experienced this. How is mounting the turbo in the front corner of the sled with the intake under the exhaust "the right place"? Looks like a convenient place as opposed to the right place. As stated before I do not have a kit for the XP. I was simply looking for people interested in seeing one done RIGHT. Maybe it can't be done, but I think it can. How about you go give yourself praise in another post and let everyone else figure it out for themselves.

-Fack

 

[skull]

Turbo

Making this post a joke? The only reason I started this post was to create something that wasn't a joke. Sure you can start your own post and claim unrealistic kit numbers, but the point is people have heard all that. Surely you've heard of a pilot jet? How do you compensate for elevation and temperature and keep the bottom end crisp and keep your turbo responsive? Anybody can adjust power jets and make these things work when the boost on, but getting the turbo to spool quickly in the deep stuff with varying altitudes and temperature changes is not as easy. Anyone who has ever ran a carbed turbo has experienced this. How is mounting the turbo in the front corner of the sled with the intake under the exhaust "the right place"? Looks like a convenient place as opposed to the right place. As stated before I do not have a kit for the XP. I was simply looking for people interested in seeing one done RIGHT. Maybe it can't be done, but I think it can. How about you go give yourself praise in another post and let everyone else figure it out for themselves.


Fack
I don't work for Turbo Performance I was just giving my ideas, I have one of there kits and it works great.

 

[Revdawg]

Some very constructive stuff going on here. i'm interested in a kit for my xp next year.
There no doubt the turbo boyz kit is good, been lots of good feed back on this and other forums. But anyone who thinks they have left nothing on the table isn't being very open minded. there's always more and possibly better to be had. i've got many years of experience in research and development and its great to have new outside opinions and idea on things we work on. If i didn't listen things would never be as good as they could be..
Keep up the good ideas guys and not get too defensive.
Revdawg.

 

[Fack]

Good point. Keep the feedback coming. This idea started from me wanting to build a sled for myself. I have a ton of resources and putting a kit together is not an issue. There is a lot to making carbs work like they should, and from what I have seen it is even harder on the ski doo because you have to eliminate the DPM. I've heard and read a lot the last few days and without a doubt will be building an XP for myself. There are a lot out there who have tried making carbs work and feel that they do not respond like EFI stuff does. There is no doubt that the EFI systems work great but carbs can too, and they do for the right people. I want to hear everyone else's thoughts and ideas. There's a lot out there that would want to see this happen and all great ideas don't come from one person.

-Fack