Twin Turbo Nytro

[nytro41]

ive only got a few pics now. i have the front end off of it. it looks like a mess right now. but that is cuz we pulled it apart. and believe me. it is set up right. they don't need to be next to each other. it would be dual sequential turbos. ones in the back and one in the front. you don't really need to know that much to have it spool fast. obviously your fuel has to be in the area of running. but the front turbo is so small that it will spool on a 5 horse power motor. (figuratively speaking). with dual blow off valves on the small turbo. soon as we hit 10 pounds. it dumps off to the big turbo. the small turbo is similar to a GT17. the big turbo is a S252 BorgWarner. they are both BorgWarner Turbos. and as far as advantage. you've got smooth power all the way from idle to full rpm. you get a nice smooth throttle response and ride ability.
Here are some Pics.

 

[mtnmodviper]

Are you the one that has a twin turbo nytro for sale on KSL?

 

[nytro41]

ya that would be me. if we cant build the kit. then we want to sell it. but of course like i said. it will be all put together and running before we sell it.

 

[thamax]

you guys know cat stopped making on-highway truck motors right? i don't think that sled will stay together at 30lbs of boost in the mountains especially when u do a long nasty pull in deep snow nobody can get them to live at 25lbs for very long. why is the sled getting pulled apart. i heard of apex twin setup out the and boondocker said they where testing something but thats from the website when it was up

 

[roughrider99]

you guys know cat stopped making on-highway truck motors right?

you do know thats not true right?? Cat is doing anything but getting out of the truck market. not sure when its gonna be released publicly or if it already has but CAT will be dropping a bomb on the truck market

 

[thamax]

then how come i can't order a cat engine in my new kenworth truck not even an option right now?

 

[EZmoney]

I just am curious what a twin setup can do on a nytro that a well tuned front or midmount turbo doesnt already do.. maybe boost like tiny instant sooner, but a nightmare of crap and way more $$.. I guess I just dont see its value on sleds, unless your just out to stroke your ego.

Out to stroke your ego??Maybe something different than the normal, kinda like putting a Yamaha motor in a ski doo chassis which i though was something different and cool. You may know a little about that build?? Where is it you see a nightmare? Obviously until something has a whole lot of seat time its going to have its gremlins, headers break ect.. We seen that with Alpines first headers and they have improved dramatically since the first. Impulse started out by Paul basically convincing his buddy that he could make a kit better than the rest over a couple beers and striping his Buddy's sled and out with the welder. A few years later it was good enough they thought they should sell the kit. If it spools fast and makes power i like it , its something ive never seen cool idea and build!

 

[roughrider99]

then how come i can't order a cat engine in my new kenworth truck not even an option right now?

CAT is not selling their engines to other mfgs, Caterpillar has partenered with international and CAT is entering the truck market with their own truck. they are targeting the huge business class market with the Caterpillar CT660 truck sorry for hijacking

 

[mattymac]

CAT is not selling their engines to other mfgs, Caterpillar has partenered with international and CAT is entering the truck market with their own truck. they are targeting the huge business class market with the Caterpillar CT660 truck sorry for hijacking

cat/intl yes, partnering no... well sorta!

fuel system patents which ended up in a lawsuit that cat ended up winning after a 4 year court battle so they now own a huge part of intl after all this, so now they have a truck manufactured by a company they own the majority of so they can design a truck around an engine that they have developed to pass emmisions, yeah its gunna be a gooder and one awesome pair IMO Yeah couldnt help hijiack, sorry!


Back on topic, boost is nothing more than measurment of air restriction or backpressure. you can have 10 lbs of boost flowing 30 CFM, and 10lbs of boost flowing 300 CFM, there are alot of variables in building these setups, matching turbo(s) to an engine isnt a one size fits all thing, when you do a compound setup it could be extremely nasty if setup right! if one wanted the extra complexity.

Im still waiting for a variable vane/nozzle turbo to be put onto one if these things. Small electronic actuator setup (or mechanical but with todays technology) and tuned in conjuction with one of pauls standalone units, now thats a game changer!

 

[highspeed427]

you guys know cat stopped making on-highway truck motors right? i don't think that sled will stay together at 30lbs of boost in the mountains especially when u do a long nasty pull in deep snow nobody can get them to live at 25lbs for very long. why is the sled getting pulled apart. i heard of apex twin setup out the and boondocker said they where testing something but thats from the website when it was up

We redid the water on it and went with a liquid to air inter-cooler, unfortunately we couldn't get the water to flow right at first. when we finally figured out how to get it we had warped the head. just pulling it to get the head fixed and then back together.

As for boost problems you are right if you detonate. detonation is the key issue. with the twin setup our aim is to get our over all back pressure down. we are running at 1.2-1 backpressure to boost ratio. we were hoping to break below that but haven't gotten that. but at that ratio there is a lot less cylinder heat and pressure creating a lower chance of detonation. in doing this we raise the reliability of the engine at higher boost. most turbos run out of there efficency range on this engine around 20psi. so those running 25psi are creating a ton of backpressure and a ton of heat. we have designed this system to run in the effecency range of the turbos.

 

[twincam88]

i personaly like the old screamin jimmies lol i love truckwest i mean snowest!! just busting ballz

 

[nytro41]

more pics of it complete.

 

[Wheel House Motorsports]

Out to stroke your ego??Maybe something different than the normal, kinda like putting a Yamaha motor in a ski doo chassis which i though was something different and cool. You may know a little about that build?? Where is it you see a nightmare? Obviously until something has a whole lot of seat time its going to have its gremlins, headers break ect.. We seen that with Alpines first headers and they have improved dramatically since the first. Impulse started out by Paul basically convincing his buddy that he could make a kit better than the rest over a couple beers and striping his Buddy's sled and out with the welder. A few years later it was good enough they thought they should sell the kit. If it spools fast and makes power i like it , its something ive never seen cool idea and build!

well, you definately know how to get me to reply..

I know my sled, and many of the t-yami's arent light... at all. but lately, from my observations of a retartedly light sled, i am seeing 2 ways of getting places. huge power and heavy and lighter and less power. turbo's alone weight about 15#, piping, extra lines, etc etc etc. it all adds up in a hurry. you may be able to safely create more power, but you have also added a bunch more weight.. so then i start to wonder if your actually getting that far ahead overall. but this also relates to the riding i like.. huge power alone wont even pretend to get it done.

i know that with every turbo system there are ALWAYS kinks, lots of them, when you build your own stuff you learn more about that than you would care to many time, myself included. With the twin system i see double the amount of things that can fail in a custom system. i have chased my tail for a long time on just a single turbo setup and just feel like that would be asking for trouble, but maybe its just a bad taste in my mouth. thats why im on propane.. stupid simple....

I think my lack of understanding comes from a lack of interest in power levels even NEAR where this system starts to shine. most of my riding makes 15# far overkill... and im in and out of the throttle so much i only need 10 or less, so to be worrying about making power at 20#+... that was the ego stroking comment, i see people wanting one just to say they do more then realistically needing that much. after watching the video of NM's boost it system on his nytro and apex ROCKETING uphill on standard alpine kits, i just dont see the need for more. again, maybe just a difference of perspective.

 

[SNOW JW]

then how come i can't order a cat engine in my new kenworth truck not even an option right now?

Hmm thats funny I just speced out a T800 with a brand new C15 motor of choice I love the C15 for the smooth power on the bad rough steep grades.

 

[nytro41]

well, you definately know how to get me to reply..

I know my sled, and many of the t-yami's arent light... at all. but lately, from my observations of a retartedly light sled, i am seeing 2 ways of getting places. huge power and heavy and lighter and less power. turbo's alone weight about 15#, piping, extra lines, etc etc etc. it all adds up in a hurry. you may be able to safely create more power, but you have also added a bunch more weight.. so then i start to wonder if your actually getting that far ahead overall. but this also relates to the riding i like.. huge power alone wont even pretend to get it done.

i know that with every turbo system there are ALWAYS kinks, lots of them, when you build your own stuff you learn more about that than you would care to many time, myself included. With the twin system i see double the amount of things that can fail in a custom system. i have chased my tail for a long time on just a single turbo setup and just feel like that would be asking for trouble, but maybe its just a bad taste in my mouth. thats why im on propane.. stupid simple....

I think my lack of understanding comes from a lack of interest in power levels even NEAR where this system starts to shine. most of my riding makes 15# far overkill... and im in and out of the throttle so much i only need 10 or less, so to be worrying about making power at 20#+... that was the ego stroking comment, i see people wanting one just to say they do more then realistically needing that much. after watching the video of NM's boost it system on his nytro and apex ROCKETING uphill on standard alpine kits, i just dont see the need for more. again, maybe just a difference of perspective.

I definitely understand your point. i love trees and boondocking. a big hill here and there i love to. if nobody wanted to take the time to actually try something. where would we be today?? definitely not a turbo-ed sled. cat has a factory turbo-ed sled. someone has to raise the bar a little bit for people to actually go forward. look at ski doo. no one new anything about a rider forward position till they did it. now look. everyone is moving to it. i mean come on. you have to do some work to get some results. look at ford dodge chevy arctic cat polaris yamaha skidoo. i bet you there first stuff they build for a new engine or new chassis or something like that didnt work the first time. it takes time to perfect it. you just have to be willing to not expect it to run like a champ the first time.
and as for a propane sounds like a waste of money. although. i saw brad story and his propane apex. he got a heater off and started cooking some stuff. now thats what im talking about. propane your are safer. but it doesnt interest me enough to buy one. not trying to be rude so dont take it as i am

 

[Wheel House Motorsports]

and as for a propane sounds like a waste of money. although. i saw brad story and his propane apex. he got a heater off and started cooking some stuff. now thats what im talking about. propane your are safer. but it doesnt interest me enough to buy one. not trying to be rude so dont take it as i am

Trust me, im all for pushing things and trying new stuff, my sled might make it obvious, im not a run of the mill mod sled type person, I definately appreciate trying new things.. Maybe if I saw it run in person i might be a beleiver, until then, just a skeptic.

and for the propane, dont worry about it.. i would never buy one either, they want to much much for it. mine has a few quirks no doubt, but for $2.50 a gallon race gas and smooth running of efi, yeah, ill ride it. If i had 1/10th of what a simmons kit costs into mine, i would be overstating what I spent. love the stuff. but to each there own, like i said about yours, until you ride with em, nothing but a skeptic right??

good luck and I would love to see a video of the thing running, just because im skeptical doesnt mean im not interested.

 

[highspeed427]

we took it out last weekend and had a blast. i will see if i can get some video of it. was running too rich so have a bit of tuning to do and my heat exchanger has a crack in it so have to weld that up but otherwise it worked great. i have 2 psi of boost by the time the sled starts to move. its weird it feels like riding a supper fast n/a snowmobile. its a lot smoother than superchargers though. i've ridden the s/c and we have single turbo stuff. its nothing like anything else i have ridden. on off throttle is instant and manageable. its smooth and ultra ridable. you don't get any sudden smack of power it just all comes in as needed. i found myself cruising through trees on a side hill and was very surprised at how easy i could keep the thing under control.

once i get it all tuned in and running right i'll see if i can make it available for a ride if anyone wants to try it out.