Turbo?? Not so sure??

[off road rider]

What's the word with all you Turbo running big dogs?
Can you honestly list failures or other tuning issues that one might be concerned about.

I've heard lots of horror stories and a few good reports.


Bike is a 15 Husky 501 with the 16 Lt Timbersled

Im not to concerned if I have to rebuild at the end of the season, but don't really want to change a piston in the new bike prior to running a turbo. I also want a reliable setup that will last the entire season.

What can you tell a turbo illiterate rider?

I think I like the variable vane units, But????

 

[mnsnowhawk]

I talked to the aerocharger guy at haydays and like the design of their kit. Might be worth waiting to see how they do this year. He said it clears with tss equipped bikes.


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[wwillf01]

I have yet to see one in the wild... As far as the forums goes kms seems to put out a solid product that everyone has been happy with...


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[jskattum606]

If your unwilling to run a low comp piston just plan to run race gas 50/50 minimum.
Also, KMS is the way to go at the moment.

 

[corn liquor]

turbo

Hay long time reader first time poster. I ride a 13 ktm xcw 500 ts. Lt. for the past 2 years. First year totally stock year two with BD. turbo and there ECU. mapping. I love my bike I have over 80 hrs on the bike with no trouble and no rebuild... I think the key is the tuning putting it on no trouble tuning can be tricky. I had mine tuned by Cody McKinney at McKinney racing in Pine Dale WY. and the bike runs flawlessly. However I have ridden nothing else to compare it to. I think the A Charger is a cool idea, IF it works the way they say it will. Just my thoughts.

 

[Rush44]

Just keep in mind that with the lower revving 501 you are going to tap out at your rev limiter pretty quick. I know some guys have updated CDI boxes to Euro maps that have a higher rev line but with the added power of the turbo I'm not so sure that's a good idea. The 450 KTM race motor gives you around 2,000RPM more which is a huge difference in the turbo arena.

 

[swedenturbo]

If you don't want to modify the engine to a greater extent I do not think you will be able to run with very high turbo pressure.
10 psi in a standard engine with e.g. 11.8: 1 in compression ratio may be at risk of detonation. Have not tested it so I might be wrong

Have run standard compression with race fuel and boosted 7.25 psi without any problems. However blew the head gasket. With stronger head studs you will eliminate that problem but in some aspects thats a engine modification...

Replacing the piston is of course a lot of work but I would say assembling and disassebling the complete turbo system each year is a quite big task.
I suggest going all the way and build a purpose built turbo snowbike with the right modifications.
Get a second bike for dirt if you like to ride in summer

 

[off road rider]

Hay long time reader first time poster. I ride a 13 ktm xcw 500 ts. Lt. for the past 2 years. First year totally stock year two with BD. turbo and there ECU. mapping. I love my bike I have over 80 hrs on the bike with no trouble and no rebuild... I think the key is the tuning putting it on no trouble tuning can be tricky. I had mine tuned by Cody McKinney at McKinney racing in Pine Dale WY. and the bike runs flawlessly. However I have ridden nothing else to compare it to. I think the A Charger is a cool idea, IF it works the way they say it will. Just my thoughts.

Thank you, I very much appreciate your feedback.

 

[off road rider]

If you don't want to modify the engine to a greater extent I do not think you will be able to run with very high turbo pressure.
10 psi in a standard engine with e.g. 11.8: 1 in compression ratio may be at risk of detonation. Have not tested it so I might be wrong

Have run standard compression with race fuel and boosted 7.25 psi without any problems. However blew the head gasket. With stronger head studs you will eliminate that problem but in some aspects thats a engine modification...

Replacing the piston is of course a lot of work but I would say assembling and disassebling the complete turbo system each year is a quite big task.
I suggest going all the way and build a purpose built turbo snowbike with the right modifications.
Get a second bike for dirt if you like to ride in summer

No doubt. I already have 6 bikes, so making the 501 a dedicated snowbike would make sense. After all you can only ride one at a time right?
Im happy to be in my 8th season of riding single skis thanks to the snowhawk,Timbersled and Blaser back in the two moto days.
I guess my stumbling point is all the stories I have heard about issues, and not wanting to be down during the season.
I appreciate everyone's feedback and input.

 

[Yetiman]

TURBO?

Not to be offensive to anyone but this is why the designers produced the Yeti.
Most of us ran turbo's on TS kits and to be honest our yamaha 450's with 129" Yetis' run ski to ski against turbo bikes with TS kits. In some cases even outperform the turbo bikes!
However, we have a few KMS turbo bikes on Yeti's and they are simply rank!

 

[mrsnaglepuss]

I have only ridin one turbo snowbike, it was fun but was bouncing off the rev limiter and I was scared I was gonna blow it up so got off of it, and thanked the owner for the opportunity.

Tillbuilt, Allen and several other members should chime in here guys your the turbo Guru's?

Like I've said before if you've got deep pockets, blow your brains out. If not a good nitrous system, and avgas.

 

[Sheetmetalfab]

Not to be offensive to anyone but this is why the designers produced the Yeti.
Most of us ran turbo's on TS kits and to be honest our yamaha 450's with 129" Yetis' run ski to ski against turbo bikes with TS kits. In some cases even outperform the turbo bikes!
However, we have a few KMS turbo bikes on Yeti's and they are simply rank!

Video????

 

[off road rider]

I started thinking a bit last night, always dangerous
Everyone seems to want to go max Hp. That's not really my goal with this bike, I like to play in the trees, poke a round a bit and have a lot of fun.
In my experience pushing max HP ends up taking some of the fun away from whatever Im playing with.. I would rather be riding than working on my bikes.
So can we run a turbo at a lower boost pressure and gain maybe 20Hp rather than almost double the horsepower? Offering a reliable machine without the need for a new piston or rebuild mid season.
What do you turbo gurus think?

 

[Rush44]

Nitrous sounds more up your alley than a turbo.

 

[n16ht5]

Not to be offensive to anyone but this is why the designers produced the Yeti.
Most of us ran turbo's on TS kits and to be honest our yamaha 450's with 129" Yetis' run ski to ski against turbo bikes with TS kits. In some cases even outperform the turbo bikes!
However, we have a few KMS turbo bikes on Yeti's and they are simply rank!

alright man lets see your Yeti outclimb a timbersled. just ONE video... yep, haven't seen ANYTHING.

 

[n16ht5]

I started thinking a bit last night, always dangerous
Everyone seems to want to go max Hp. That's not really my goal with this bike, I like to play in the trees, poke a round a bit and have a lot of fun.
In my experience pushing max HP ends up taking some of the fun away from whatever Im playing with.. I would rather be riding than working on my bikes.
So can we run a turbo at a lower boost pressure and gain maybe 20Hp rather than almost double the horsepower? Offering a reliable machine without the need for a new piston or rebuild mid season.
What do you turbo gurus think?

You should sell your 4t and build a 500 2t. My N/A YZ450 just was not enough last year, and I only weigh 145lb.. Turbo bikes just want to hit the rev limiter, and I was bouncing off of it quite often without a turbo.

I'm building my CR for ~70hp with moderate mods and then a +20hp shot of nitrous next spring.

 

[jskattum606]

I started thinking a bit last night, always dangerous
Everyone seems to want to go max Hp. That's not really my goal with this bike, I like to play in the trees, poke a round a bit and have a lot of fun.
In my experience pushing max HP ends up taking some of the fun away from whatever Im playing with.. I would rather be riding than working on my bikes.
So can we run a turbo at a lower boost pressure and gain maybe 20Hp rather than almost double the horsepower? Offering a reliable machine without the need for a new piston or rebuild mid season.
What do you turbo gurus think?

I think this is a great idea! The problem is the single cylinder motors are tough to turbo. Having just one exhaust pulse is hard to work with. This is the major reason why they only make power on top end with what is out there.
I built a daily driver turbo toyota truck last year with a 4 cyl motor and that thing gained serious torque. Found myself driving at half the rpms of before to get more power and was only running 7 psi. This is what I want to see from a snow bike setup. Just need to make it happen some how

 

[Sheetmetalfab]

I think this is a great idea! The problem is the single cylinder motors are tough to turbo. Having just one exhaust pulse is hard to work with. This is the major reason why they only make power on top end with what is out there.
I built a daily driver turbo toyota truck last year with a 4 cyl motor and that thing gained serious torque. Found myself driving at half the rpms of before to get more power and was only running 7 psi. This is what I want to see from a snow bike setup. Just need to make it happen some how

A built kx500 has double the torque of a 450f at 4000 rpm.

 

[off road rider]

Nitrous sounds more up your alley than a turbo.

Maybe.. but Im not a big fan of NOS.. Been there done that. Ive got a kit sitting here collecting dust.

Maybe what Im asking for is not possible. IMO you can have a lot more fun when your not bouncing off the rev limiter.

 

[jskattum606]

Yeah, kinda sounds like you should just decide to be happy with the stock 501