Where is the clear plastic hose coming from the ECU supposed to be routed?

[Frostbite]

Is there a proper routing for the clear plastic hose coming from the ECU?

I would think you'd want it directed forward of the ECU to ensure it isn't using hot air directly off the engine to direct engine perimeters?

Is there something that direct you how to route this hose?

 

[89sandman]

pointing down and to the rear, its to let moisture that may build up inside the box out, if its routed towards the front if you get snow in through the front vents it could clog the hose.

 

[Frostbite]

So does anyone know, is it a drain line or a sensor line?

That would make a huge difference in the way it should be routed.

 

[bamfm7]

Pretty sure it is a pressure sensor for altitude compensation. So as long as it is not plugged, it should be fine where ever it is routed.

 

[BigAir]

It is a sensor line, but they route it back away from any snow coming in the front.

 

[Frostbite]

Ok, thanks.

I searched the entire manual and found nothing on the subject.

 

[dgreet77]

Pretty sure it is a pressure sensor for altitude compensation. So as long as it is not plugged, it should be fine where ever it is routed.

^This is it. May cause the sled to run funny if it does get iced up. So anywhere it doesn't have this happen is good.

 

[WyoBoy1000]

It should be routed into the nose cone just in front of the bulk head in the center along side the intake. It is a barometric sensor tube.
I never heard what your leak was, did you get the sled running and some miles on it yet.
another thing I thought about was if the 2010 m8 looks a lot like the performance 09 m8 as far as porting goes, can you put the 2010 slp pipe on and gain power?

 

[Frostbite]

Dang it WyoBoy1000, that's where I just had mine routed until I was corrected.

Is this tube only sensing air pressure for a barometric pressure reading or is it also sensing ambient temperature from which to base fuel flow upon?

I thought the later was true as well but, I may be wrong.

 

[aksnopro]

yes

yeah i have heard of people putting the 2010 pipe/ypipe on and gaining horsepower.

 

[Frostbite]

Really, did they also use the 2010 ECU to do so, and if so, where did they route the clear sensor hose?

 

[AKDMAX1]

I have mine routed to the nose cone, mainly because if you have it routed like the factory does it could and does pull the warm rich air from the exgaust and that effects performance and can cause a lean condition. Just my .02

 

[krom]

The tube is only for baro pressure
air temp is measured by the air temp sensor in the air box!!
Run it back and down so it can't get plugged or blocked off and you will be fine

 

[WyoBoy1000]

I have mine routed to the nose cone, mainly because if you have it routed like the factory does it could and does pull the warm rich air from the exgaust and that effects performance and can cause a lean condition. Just my .02

from the factory all the ones I've seen where as stated above

 

[stalefish_132]

its not an altitude compensator, becasue when you plumb boost to it the altimiter goes below sea level

 

[Frostbite]

So, are we getting anywhere?

Forward or back? What's it going to be?

I see almost a 50/50 split.

If it is indeed just a barometer, then what effect does temperature have on barometric pressure? Probably none. If that's the case then it would be best to run it back below the pipe?

 

[Dam Dave]

on my stock, never been apart or worked on 2010 M8 the hose goes back and down, just like my 2009 M8, just like my 2008 M8, just like, ohh you get the idea

 

[AKDMAX1]

The tube is only for baro pressure
air temp is measured by the air temp sensor in the air box!!
Run it back and down so it can't get plugged or blocked off and you will be fine

Doesnt the pressure change with temp change? im may be misunderstanding how that works then.

 

[bamfm7]

its not an altitude compensator, becasue when you plumb boost to it the altimiter goes below sea level

You have proved in the same sentance that you are wrong. there is more presure at sea level. this is why when boost is added the altimeter will go below sea level.

Doesnt the pressure change with temp change? im may be misunderstanding how that works then.

Air expands as it heats up, So in order to have a air pressure gain from a temerature increase the area would have to be air tight like a tire or a air tank. I think the hood has enough venting so pressure increase w/temperature is not a concern

 

[WyoBoy1000]

Barometric pressure can change with heat and does not have to be sealed. This is why at times people have rerouted this hose to eliminate a bog, changes the mapping just enough to richen it or lean it out.

I'll answer your question the easy way.