If not closed loop then what?
New Boost-It controller release!
- Thread starter NM
- Start date
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Turbo11T
Well-known member
I would think that there may be a safety system built into it that if the O2 goes way lean then it would increase the fuel. Possibly?????? Still user tuneable just there as a safety factor?
O and if any of the nytro guys wanna sell me the old box I am interested. I want to try it on a carbed vector motor, But it really has not been done yet so i don't wanna spend a ton of money trying something that may not work, As I am not sure how I would keep the carbs from adding fuel From the boost pressure.
O and if any of the nytro guys wanna sell me the old box I am interested. I want to try it on a carbed vector motor, But it really has not been done yet so i don't wanna spend a ton of money trying something that may not work, As I am not sure how I would keep the carbs from adding fuel From the boost pressure.
Easy to stop the carbs from adding extra fuel under boost, don't pressurize the float bowls, just vent them to atmosphere. Then you can use Neil's setup to add extra fuel under boost, you will obviously have to add injectors for the extra fuel supply though.
As for the system adding fuel if the sensor goes lean, that wouldn't be a good idea now I realize. I wasn't thinking about the leaded fuel problem, but you wouldn't want the system adding fuel if the O2 sensor went bad and ruining your performance till you replaced it.
As for the system adding fuel if the sensor goes lean, that wouldn't be a good idea now I realize. I wasn't thinking about the leaded fuel problem, but you wouldn't want the system adding fuel if the O2 sensor went bad and ruining your performance till you replaced it.
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Turbo11T
Well-known member
I would think you would still need to pressurize the float bowls to keep the boost from pushing fuel out. That is where I think it would be tricky. Maybe it could be fixed just by leaving the fuel pressure to the carbs like it is now? Hmmm this is where I don't know how it would work.
We the safety of the O2 in the box if it went lean, it would catch it right away. And then user could decide what to do, example Unplug the o2 sensor and ride the rest of the day. I am just speculating on this.
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NM
Well-known member
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NM
Well-known member
This is just information of course, but very interesting. These pics are poor and I apologize for that. This is the air intake to the motor on a 5.9 Cummins. We have seen people making over 450 hp and 1000 lb ft of tourque with this on the motor. The opening is 1.5 inches by 3 inches and is supplying enough air to make those numbers to a 6 cyl 5.9 l engine. It is just a matter of moving enough air. If anything, snowmobiles have a big advantage because we are starting with relatively cool air.
I just thought some people would find this interesting.
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NM
Well-known member
This function is pretty cool. The way it works, is if the controller see's lean for more than 2 seconds, it automatically adds 25% more fuel to the map while the sled is on boost. Of course it resets every time the sled comes off of boost. The reason it is 2 seconds, is so if you are in and out of the throttle which can create momentary lean hits on the AEM gauge then it won't trigger the leanwarn. This system will also trigger the LED on the controller so if by chance you can see the light, then you know it went lean.
This is designed so those long WOT pulls will not only keep fueling, you will not lose power due to being lean. It is really a tuning aid and a safety feature.
The box also has 250 points of entry on the fueling, so it can be fined tuned for things like drag racing etc. I could set my sled so it would be 11.6 A/F at WOT every pull on a long lake. It only takes a few seconds to adjust.
This is designed so those long WOT pulls will not only keep fueling, you will not lose power due to being lean. It is really a tuning aid and a safety feature.
The box also has 250 points of entry on the fueling, so it can be fined tuned for things like drag racing etc. I could set my sled so it would be 11.6 A/F at WOT every pull on a long lake. It only takes a few seconds to adjust.
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NM
Well-known member
Wow, that is impressive! We have also seen bigger numbers than what I had stated, but i didn't want to make a debate over it...if you know what I mean.
It is amazing how much air you can cram through a small opening!
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NM
Well-known member
Here is the last cool thing that we have been working on. This new controller will datalog and replay the log in 250 rpm increments with a A/F display. You can then trim the fuel more or less in that window to compensate for rich or lean spots. It might not be for everyone...but it is nice for fine tuning the map.
These pictures do not show a 02 number because the log only displays after the sled has come off of boost and is still running. The blanks are on the screen where the 02 numbers would be displayed.
Oh and a new toy we just picked up for testing!
These pictures do not show a 02 number because the log only displays after the sled has come off of boost and is still running. The blanks are on the screen where the 02 numbers would be displayed.
Oh and a new toy we just picked up for testing!
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Turbo11T
Well-known member
Here is the last cool thing that we have been working on. This new controller will datalog and replay the log in 250 rpm increments with a A/F display. You can then trim the fuel more or less in that window to compensate for rich or lean spots. It might not be for everyone...but it is nice for fine tuning the map.
These pictures do not show a 02 number because the log only displays after the sled has come off of boost and is still running. The blanks are on the screen where the 02 numbers would be displayed.
Oh and a new toy we just picked up for testing!
I tell you what I wish i had the NM Boost it system for my doo 600 sdi turbo 3 years ago. I would probally be still riding it. Ease of tuning and a built in safety feature! who could ask for more!
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BLUE BLOOD
Member
NM, When using your controller, Are you making any changes to the ignition timing?
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NM
Well-known member
We are making no changes to ignition timing. We have found that the guys who have taken off a ignition timing control device have actually improved there throttle response, and have not heard of any cases of detonation etc. I have over 15000 kms on my boosted sleds and have never had a timing device, or a failed engine.
We are filling orders this week with the new controller, and the production is getting better every week. We also hope to test on the 2 smokie next weekend.
Did you ever get to test it on the S/C nytro?
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NM
Well-known member
We have, and it works well. It is running the 1st gen controller though.
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