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Turbo

Ok, the Boondockers kits have a second injector to keep the AFR safely rich when desired. Does the KMS system use a second injector? If not, then it's not exactly the same scenario I was originally asking about..

And on these KMS kits, what control do you have over boost if the only box on the machine is the PC5? I'm not an expert, but I don't think they control boost vs fueling do they? Enlighten me.. I'm just trying to learn as much as I can before all my brain cells die. I have a few minutes left I think.

Jon


cr500afx said:
Should work. Minus the BD computer, The KMS turbo kits come set up exactly that way with the PC 5 and AT. And it works.
Click to expand...
 
Our newest systems use a secondary injector. We designate a PCV with auto tune to create a high resolution map for the secondary fueling. This allows for a very "hands free" tuning experience. In my opinion, the best fuel controller is the one you never have to mess with.:face-icon-small-hap

The pcv does not have the ability to control boost. I use a separate control for this.
 
Last edited:
My buddies KX turbo showed up yesterday after a long wait. He was order number 3 for this years snow check and has been paid in full since October. The install starts tomorrow.
 
slickace15 said:
Post some pics, get this up and going and let us know, FYI heard 8psi is for pussies....
Click to expand...

Anyone can just turn up the boost and grenade their motor... our objective is durability and reliability. That is what this person is going for and I think it's the smart decision. We'd rather put in 80-90 HP reliably then crank it up to 110+HP and destroy the motor. 80 HP at altitude is still doubling the at altitude HP... I don't see what's ***** about that.
 
Boost

You do realize if functioning properly, 8 psi is nothing if your altitude is 11,000 or 12000 feet, if setup properly at elevation... I just am curious to know what boondockers decided to preset setting at. It could already be at 10 psi. Given the fact that nobody seems to give any insight on how the kits run or operate in the real world. I followed other turbos on here which are a true one off to bike setups but I'm intrigued to see what a box kit is capable of doing. So anybody with any information would be great.
 
We were informed by boondocker that our overall HP was equal to 10HP for every 1lb of boost. We ride around 6,000ft. Our goal is roughly 80hp at altitude for a safe boost environment and hopefully increased durability.

This is NOT my personal bike but I will be involved with the build and the upcoming testing. You have not heard much about the boondocker turbos this season for one main reason.... very few people even have them in their hands yet.
 
keep us posted

hey rush rodger here from white sulphur talked to you on the phone a while back about the kx450f as a snow bike. I'm a horse power junkie keep us posted on how the turbo works very intrested thanks Rodger
 
Rush44 said:
We were informed by boondocker that our overall HP was equal to 10HP for every 1lb of boost. We ride around 6,000ft. Our goal is roughly 80hp at altitude for a safe boost environment and hopefully increased durability.

This is NOT my personal bike but I will be involved with the build and the upcoming testing. You have not heard much about the boondocker turbos this season for one main reason.... very few people even have them in their hands yet.
Click to expand...

Rush, what bike are you doing the build on? I installed and dyno'd the BD kit on my 2014 KTM 500 XCW. Dyno info on my user page. Install was per BD instructions with the exception that we had to install a lockout clutch to get true numbers due to clutch slippage. Clutch slippage probably not an issue on ST kits, but could be on LT kits that will hook up better. Turbo made 10psi boost with some higher spiking. HP was increased over stock after around 7500 RPM.
 
I rode a 2014 Husaberg FE501 with the BD kit on it. Idle, throttle response and mid range power were identical to stock. Power would come on at what seemed like 7k to 8K RPM and then shortly there after it developed a high RPM miss which made you back off the throttle and get out of the power. Very annoying! The owner has since contacted Boondocker and they've sent him a new control box with some updates which include a wire which wraps around the spark plug lead. Seems they're having trouble getting an accurate RPM signal. That's all I know for now, and we'll have the updated kit on the snow in a few days
CD
 
carbondaddy said:
I rode a 2014 Husaberg FE501 with the BD kit on it. Idle, throttle response and mid range power were identical to stock. Power would come on at what seemed like 7k to 8K RPM and then shortly there after it developed a high RPM miss which made you back off the throttle and get out of the power. Very annoying! The owner has since contacted Boondocker and they've sent him a new control box with some updates which include a wire which wraps around the spark plug lead. Seems they're having trouble getting an accurate RPM signal. That's all I know for now, and we'll have the updated kit on the snow in a few days
CD
Click to expand...

Turbo lagging to 7-8K RPM is same as we saw on BD Turbo KTM 500 Dyno runs. Was the T-Berg on a short track or long track? Any chance the bike is hitting the rev limiter? If so, might be track slippage (short track) and/or clutch slippage (long track).
 
It was a ST. Seemed a little early for the rev limiter. BD knows they have a problem, as they're sending out updated control boxes.
 
I know some bikes have a much lower rev limiter (like around 9500) than most race 450s. My buddies KX is 11,000. When looking at the BD controller I noticed the same thing, measurable boost really didn't start to get produced until 7,000 rpm. Only having a roughly 2k RPM window seems awfully tight on those lower RPM bikes. Does anyone think that engine characteristics such as max RPM should be considered when picking a boost platform or can the system be tweaked to produce usable horsepower at lower RPMs?

Boost novice here.
 
Dyno sheets

http://www.snowest.com/forum/attachment.php?attachmentid=226476&stc=1&d=1391639288

You can see the sheet on the left is a stock 500 and the one on the right is a
KMS boosted 500 and a 450. The 500 makes power at a lower rpm and holds it to peak or redline. When you compare boosted to a stock bike you can see the boosted bike is still making way more power at lower rpm than a stock bike.

Look at the HP of the 450 it is below the 500 until 10,000 rpm.

So to answer your question it should not matter what bike you choose.
Hope this helped I have had a great season this year on mine and have no regrets.:face-icon-small-hap

500xc-w.jpg photo.jpg
 
Last edited:
Q500 said:
Has anybody seen egt's. Curious to know how hard the envelope is being pushed.
Click to expand...

On the KMS Turbo kits the AFR is controlled in real time by auto tune which is set to 12.5.
The auto tune keeps it pretty close to that.

Not sure how it's set and controlled on BD kits.
 
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