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Discussion Starter #1
ok,this is my view,took the bike for a dyno today,but could not do it as my race ecu was damaged by me,the pc5 could not change the air and fuel mix because I reversed the pos and neg wires using the vdsts software,this shorted out my pc5 ,had to buy a new one ,but thought the ecu was fine,well no it must of done some damage to that also,as we were getting figures of -63 in the mid section of the map.

so went home and got my standard ecu ,plugged that in and then the figures where fine. around -15 to + 10 in the cells even up to 30 either way is fine.

now my question is why is there a need to block of the egr hose,I feel this is not correct ,as it is ment to burn exessive fuel left behind.He put a marble in the hose to block it. what are your thoughts? The bike is popping on decal,so i will pull that marble out and see what happens.

cheers eddy
 

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If the egr system is what I think it is (the secondary air pump that burns off excess fuel in the exhaust before it exits the pipes) then it gives a far more accurate a/f reading if there isn't a secondary system pumping fresh air into the exhaust. Any good tuner should know that and take steps to pinch or block off that hose before doing any tuning or dyno pulls.
 

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If the egr system is what I think it is (the secondary air pump that burns off excess fuel in the exhaust before it exits the pipes) then it gives a far more accurate a/f reading if there isn't a secondary system pumping fresh air into the exhaust. Any good tuner should know that and take steps to pinch or block off that hose before doing any tuning or dyno pulls.
Agree!
A real EGR (exhaust gas recirculation) routes a portion of exhaust gases back into the airbox for mixing with the intake charge.
I think you're referring to the fresh air injection into the exhaust, (Yamaha calls it AIS, Suzuki calls it PAIR) whatever it's called by the manufacturer, it puts fresh air into the exhaust to supposedly reignite unburnt fuel to reduce emissions.
Personally I think it's genius! If you pump clean air into the exhaust stream you'll undoubtedly have cleaner air exiting the pipe, regardless if any additional fuel is ignited or not.

In the case of tuning the fueling, if this system is not somehow disabled, you'll get a skewed air/fuel ratio reading.
In this case the tune will be richer than desired because of the added fresh air.

Hope that wasn't too long of an answer.
 

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Discussion Starter #5
ok ,currently running std ecu,pc5, and decate,with o2 optimizer plugged in for the 20% area, this is until i pick up another race ecu. so i am going to take out the marble he put in the egr pipe to stop the air.

but my real bug bearer is why i am getting popping and backfire on decel.
 

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Discussion Starter #7
John,I think it is to rich,who knows,never used to do it before,but then again have fitted new throttle bodys,all synced again ,will have to wait until i can source another race ecu,and dyno it again, but i have new sensors on the way,also might have to look at the valves,well at least i just about know every inch of this bike lol.

cheers eddy
 

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After fire (what you are describing) is unburned fuel igniting in the exhaust....this is ONE of the purposes of the second air system. The other is to help heat up the catalytic converter for better efficiency.

Some EFI systems control a solenoid that opens and closes the second air system...don't think MV does but not sure about later models. Reed valves in the valve cover only allow air flow when there is negative pressure in the head pipe (decel?).
 

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When installing the MV Corse Race kit I could not find any pipe going from the exhaust to anywhere.........

Where is the exhaust gas taken from???

Do the new Brutales really have an AGR??

Jochen
 

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When installing the MV Corse Race kit I could not find any pipe going from the exhaust to anywhere.........

Where is the exhaust gas taken from???

Do the new Brutales really have an AGR??

Jochen
No exhaust gas being taken.
The air goes from the airbox to the exhaust ports via the valve cover.
 

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Can you tell if it is a lean type bang or a rich plop noise Eddy? Sorry but that's the only way I can describe it...
Lean after fire occurs from the inability of the engine to achieve complete combustion due to lack of fuel, so unburned fuel from the lean mis-fire accumulates in the exhaust and eventually explodes....frequently on throttle application rather than decel over-run.
 

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What hose is it? The one in the front of the airbox or the one in the back??
Just do not want to take off the tank again ;) .
The other hose then must be the crankcase breather....

Thanks
Jochen
 

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The hose on the back is the crankcase breather. The hose for the second air system comes off just behind the air filter on the left side on my bike.

From my 2008 910 Euro3 parts book:
 

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Thank you!!!
 

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Discussion Starter #15
well removed the marble in the pipe ,and guess what no after burn,much better,so my thoughts are, with std ecu and pc5 and optimizer,leave unblocked,or do they block the pipe when it is on a dyno then take it out after they have tuned the bike,buggered if i know?

cheers eddy
 

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I'll have mine dynoed & mapped end of this month. The guy can access the ECU via Alientech - full access to all settings. No module like PC5 needed and the ignition can be modded. License is 90 € incl. tax of 19% .
 

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Discussion Starter #17
ok more info on alientech please wich product exactly are you referring to. link please

cheers eddy
 

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Here ya go:
http://www.alientech-to.it/en

Do not know the total equipment of the shop yet.....

But with Rexxer ECM Titanium map editor you also have access to ignition
 

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No exhaust gas being taken.
The air goes from the airbox to the exhaust ports via the valve cover.
Hi BSR-1 your response is the first light I've seen in this tunnel. My 2010 1090RR was fitted with the MV titanium race exhaust a few months after I bought the bike. The instructions tell you to plug the two ports on the valve cover, and remove the solenoid valve. For the life of me, I can not understand how air going thru the two reed valves gets from the top of the valve cover, to the exhaust tracts.

What am I not seeing?

Best wishes,
Dick
 

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Negative pressure waves in the exhaust port pulls air past the reed valves down passages in the head. The air box supplies clean air via the solenoid. The reed valves prevent positive pressure in the exhaust ports from pushing exhaust gasses back up into the air box.
ECM controls the solenoid to only allow the air flow when needed (throttle position, engine rpm used for decision).
 
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