best turbo?

[ski-doo-189]

what would be the best trubo to put on an 2007 summit xrs 159. i would like it to be reliable. or what would be the best thing to get more power?

 

[winter brew]

2-stroke "turbo" and "reliable" do not go together. Nothing will match the power but a mild big bore will be MUCH more consistant and reliable.

 

[Calvin42]

Turbo 2 stroke and reliable, now that's funny!!!

 

[maxwellzx]

they work well. just watch your AF guage and adjust the powerjets with the turn of a knob when needed.

 

[DWHalverson]

They work fine if you know what you are doing on the install, operation and maintenance. Much like most turbos. We've got one on a Rev and are getting going on the one for the XP. We just keep getting snow and getting side tracked.

 

[Todd H]

I would not waste the money on a big bore for the Doo motor. I did not have very much luck with mine. I went with a 900 Crankshop, and it did not perform the way I thought it would. Sure, it was stronger than the 800, but for the $ not worth it.

Turbo on the other hand is about the same amount of $ that I had in my motor, but it destroys the power that a BB can produce.

I know that there are alot of people that are running 860's that are reasonable and it sounds like they run really well. But in no way will they ever compete with the turbo.

Depends on how much power you want to run, how well you can ride and how much cash you are willing to spend....

 

[ski-doo-189]

well i would like to get as much power as i can. around 200hp would be nice but i know that will cost some coin. what brand of turbo would u put on or whos big bore . i know crank shop pipes work well with doo . money not a real big deal but dont want to go to crazy another few thousand sure wouldnt hurt.

 

[DWHalverson]

Crank Shop makes a great product, but even thier cylinders need work to get the power out of them. 200hp on most big bore twins is tough to achieve and maintain. If I were to do a big bore I would do an 880 from Ralph at Split Second or his monster custom 1300cc twin (now you get 200hp even on pump gas and single pipe). I play with turbos and they deliver power different than a big bore. It's all in what you what to do with the sled.

well i would like to get as much power as i can. around 200hp would be nice but i know that will cost some coin. what brand of turbo would u put on or whos big bore . i know crank shop pipes work well with doo . money not a real big deal but dont want to go to crazy another few thousand sure wouldnt hurt.

 

[tntm7]

N2o

Why does nobody on this forum talk nitrous? cheap HP and very little compromise.
I hold the button on mine for days, have emptied the entire bottle in single pulls on many climbs, you get a boondock friendly sled, and comparible power to a turbo, within 10hp and its only 1200 bucks!

 

[Todd H]

Why does nobody on this forum talk nitrous? cheap HP and very little compromise.
I hold the button on mine for days, have emptied the entire bottle in single pulls on many climbs, you get a boondock friendly sled, and comparible power to a turbo, within 10hp and its only 1200 bucks!

Been there, done that. My 900 BB with Nitrous is not even close to power output as with the turbo. Maybe at sea level they would be close, but in the hills there is no comparison.

 

[DWHalverson]

I think some have been down that road with less than expected results. Either from a poor set-up or a kit that had issues. So I think some people look at it as a black eye and I think most want the power there all the time although only need it few times through out the day. I put together a system for my wifes sled about three years ago and have yet to poke the button. Too busy to dial it in like nitrous needs to be to perform as it should.

Why does nobody on this forum talk nitrous? cheap HP and very little compromise.
I hold the button on mine for days, have emptied the entire bottle in single pulls on many climbs, you get a boondock friendly sled, and comparible power to a turbo, within 10hp and its only 1200 bucks!

 

[CATillak]

Been there, done that. My 900 BB with Nitrous is not even close to power output as with the turbo. Maybe at sea level they would be close, but in the hills there is no comparison.

Weird, our mountains ARE at sea level! We cant all be so lucky..

Why give up the lowend snap of a bigbore too add 10lbs and have a dope sled for 2 rides before it grenades itself? Unless ofcourse you have a really good tech building your kit, it seems like a waste. Maybe a big bore and a shot of spray??? Match what that turbo would put down on any reasonable amount of boost.

 

[Todd H]

Weird, our mountains ARE at sea level! We cant all be so lucky..

Why give up the lowend snap of a bigbore too add 10lbs and have a dope sled for 2 rides before it grenades itself? Unless ofcourse you have a really good tech building your kit, it seems like a waste. Maybe a big bore and a shot of spray??? Match what that turbo would put down on any reasonable amount of boost.

I don't think I explained my self very well. Started with the 900 Bigbore. Not enough. Added nitrous. Better, but still not what I was looking for. Put a TURBO on the Bigbore and it flat rips (+20 mph track speed over the nitrous set-up). Tuned properly the boosted sled will not grenade after 2 rides. Actually, this motor runs better on boost than ever before.

I've spent the last five years messing around with the bigbore / nitrous combo and looking back I would never do it again. The turbo's just work in the mountains. Just my opinion, and based on my experience.

 

[CATillak]

Awesome, then you can be able too tell him your set up and his sled should rip and not have any issues. His questions asked.

 

[CBX]

turbo

Seems like a GT28 variant is the way to go from all the guys i've talked to. Either a 2871R, 2860RS, or 2860R. The 71 is a bigger turbo.

Looking at the turbo map, (i'm not a pro at 2 stroke apps by any means) seems like the 2860 would be a great choice. You would have to get pretty crazy with the drive ratio before your out of the zone.

I've talked to a few aerocharger owners. You get alot of feedback. Good and bad. I think everyone know what is what there. Too bad you cant get the simplicity of the aero system, and the durability, price, and avaliblilty of a garrett.

I've been really flirting of a boosted Xp. Not as "turn key" per say, but i have some really neat ideas for a simple almost turnkey setup.

By the way Boostit's setup looks wicked. Seach his name. He's got a viddy up and its awesome. I may end up going with his setup. Uses a garret turbo. He's the only guy that actually has a video out showing what it does.

Pretty hard to argue with about 180+ hp at 10k feet. In an xp chassis... sounds like fun fun fun.

http://www.youtube.com/watch?v=PLH3_OAjEiA&feature=related

 

[DWHalverson]

Both the 2860 and the 2871 use ball bearings. Can't beat the prices on the Garretts. Dave Bell does build nice kits. We will have kits out for the XP useing the Garrett for next season. Still doing some testing.

 

[CBX]

Thanks, edited for correct info.

 

[River Ratt]

Turbo's & Big Bores

Personally I would not put a turbo on the Doo's, no EFI and there motors are just not that strong. I have 2 friends riding M8's with Boondocker turbo's and they are very impressive and so far reliable. As much as I don't like Cat the M8 is a Turbo friendly motor. Also with Big Bores, you do not get very much gain for the money spent compared to the gain that a turbo gives you, I've owned both, BB Doo and an old Aero charger (First Choice Turbo) on a Polaris. Good luck with what ever you try ?

 

[gus bohne]

I have two very very happy customers with CPI based kits on there rev 800's.

Both are running at seal level,, sorry .
Both are running 20+ psi boost without even a single reed failure.

Both are using my "Keep It Simple Stupid " fuel system and are on CARBS !

max run distance has been 1/2 mile wot.. they have blown 3 tracks at that distance EACH ! still no engine or turbo issues at all..




Call or pm me for system stats and prices. Hell I'll even get you in touch with them .. Now I am building them each a CARBED 1000 rt turbo !!

dump that sdi sytem, .

Cat efi si as good as carbs but the electrical systems are taxed when using multi injectors, at last weeks shcuss mtn climb the two d and d 1200 turbos could not even come close to the little REV ....
The woner was niceenough,, he let the cat guys run the doo till they thru them off the hill after dark...

40 runs total at 15-21 psi with NO ISSUES not even a belt..
oh and,, zero carb adjustments from 15 degrees to 50 +.


Just wish I figured this stuff out in the 80's when I was changing engines in my middlesex turbo indy;s DAILY !!! LOL


Gus
BSP


Gus

 

[DWHalverson]

I'm not trying to start anything here or make this a personal bash, but here is how I see it. I have a turboed M-7 useing a Garrett turbo built by Brad Story, so I had some confidence when I bought the sled used. I was, and still am amazed at the power and reliability of this little engine. Too bad it is a Cat. The efi makes it easier in some ways and tougher in others. There is still some minor tweeking to be done for the performance to be where it should on a turbo sled. It might not be daily but this is how I do things. The carbed turboed Rev we have been testing with shows the same. You could do nothing to it, as most would and ride it all day or do minor tweeks to get the potential up there where it should be. I did not even want an XP because of past engine issues Ski-Doo has had, but I'm so confident in the carbed two-stroke turbo configuration I'm going through with it and I will see first hand how it goes. So far things have been very promising on the XP. I figure if I build something that works and I feel confident about selling a quality product to people that have very few chioces to pick from when it comes to a Garrett charged Ski-Doo, then that makes it better for everyone involved. The current carbed sleds' electrical systems are some much more powerfull now that they have extra power left for powering auxillary pumps and what ever else is needed for a turbo sled. So the electrical systems are not as taxed as they were years ago for the required parts. Turbo aside, most people can change jets if required, efi makes it tougher to diagnose any fuel delivery issues. The biggest thing I have seen for most people is finding boost leaks on any turboed sled. That is where some different engineering comes into play to help to eliminated the leaks. I have seen some kits that were scary in my mind as far as how anything stays on under boost. Bottom line is, I feel the carbed turbo two-stroke is still a dirty word to a lot of people and I hope to show myself, and hopefully others that it is not. So far results are good and everyone else that has been around a our test Rev has been impressed too. I hope the XP shows the same. I thank you for your response and I do look at the big bore sleds vs turbo power and some of the big bores are not without issues too. Maybe the engine doesn't hold together or they don't make the power as advertised or parts are now an issue on a non-current big bore. The turbos are for the most part off the shelf and if they aren't then the replacement parts are still available somewhere. I don't think Garrett is going out of buisness soon. I think most are in love with the idea of a turboed sled but still lack the knowledge required, and for those then the stock sleds would be better for them.

Dave

Personally I would not put a turbo on the Doo's, no EFI and there motors are just not that strong. I have 2 friends riding M8's with Boondocker turbo's and they are very impressive and so far reliable. As much as I don't like Cat the M8 is a Turbo friendly motor. Also with Big Bores, you do not get very much gain for the money spent compared to the gain that a turbo gives you, I've owned both, BB Doo and an old Aero charger (First Choice Turbo) on a Polaris. Good luck with what ever you try ?