Bike India Q&A - R15 Aftermarket Airfilter - Page 3 - xBhp.com : The Global Indian Biking Community

BANDHAV · 12-28-2008, 11:18 AM

^^Endless desires, man someone who has already been there and done 148 kmph on his stock baby R1, wandering around to increse the performance by that extra bit.

Sagar bahi ab kya irada hai ??

SAGARR_46 · 12-28-2008, 11:26 AM

Quote:

Originally Posted by BANDHAV

^^Endless desires, man someone who has already been there and done 148 kmph on his stock baby R1, wandering around to increse the performance by that extra bit.

Sagar bahi ab kya irada hai ??

Am mighty pleased with her top whack but I just wanted to, as Joel had framed it, "Hit the sweet spot quicker"

Joel · 01-05-2009, 04:24 PM

The R15 has 5 sensors.
Crank position sensor, Throttle position sensor, Intake pressure sensor, Intake temperature sensor and coolant temperature sensor. Its an open loop system and can never adjust to additional changes. Adding a freeflow filter will lean out the mixture even further. You will need to manually richen the mixture by changing the AFR.
The R15 does not have an O2 sensor to automatically vary the AFR.
Open loop systems are cheaper and widely used on low capacity engines.

DriftKingNT · 01-05-2009, 09:04 PM

Quote:

Originally Posted by Joel

You will need to manually richen the mixture by changing the AFR.

More details on this please.

vibhanshu · 01-19-2009, 08:54 PM

Quote:

Originally Posted by DriftKingNT

More details on this please.

Yes, even I would like to hear. Its really interesting.

Quote:

Originally Posted by archibaby

one more question .. now there is a screw to adjust the idling level and I have adjusted it too. So can we make the mixture richer by increasing the idle.

also are tuning boxes such as PC available for open loop FI systems ?

.:. Archi

Do we know how much to increase the idle RPM.

Probably we should say goodbye to the aftermarket air filters for R15. Or can anything really be done about it.

prashanth_benz · 01-20-2009, 04:47 PM

Damn man...i thought the only simple mod that could be done to an R15 was the filter...now even that seems to be a complex affair....btw...can a aftermarket lambda(O2) sensor be fitted to the R15's system ..??

Xenologik · 01-20-2009, 06:38 PM

that would require an entire change in the system.. after all the ECU has to understand the sensor to actually do something !

not possible practically i reckon.

but note that you CAN change the AFR by some instrument Killer has mentioned. but you have to know who has such an instrument !

vibhanshu · 01-21-2009, 03:10 PM

Quote:

Originally Posted by Joel

The R15 has 5 sensors.
Crank position sensor, Throttle position sensor, Intake pressure sensor, Intake temperature sensor and coolant temperature sensor. Its an open loop system and can never adjust to additional changes. Adding a freeflow filter will lean out the mixture even further. You will need to manually richen the mixture by changing the AFR.
The R15 does not have an O2 sensor to automatically vary the AFR.
Open loop systems are cheaper and widely used on low capacity engines.

Just checked out the wikipedia. They say that a separate O2 sensor can be attached to the vehicle and Air Fuel ratio can be tuned for high performance. 2 Types of meters are available: narrow band and wide band, later being more efficient. This will also determine the fuel being lean or richer. But I am not sure how this system will be attached to the ECU of R15.
Real Full Article

Half knowledge can cause damage. Can you throw some light on it ?

Aparajith · 01-21-2009, 04:33 PM

The sensor may be available, but how do u plan to attach it to the ECU? The ECU should support these inputs and calculate the fuel inputs accordingly. I do not think it is as easy and cheap as it looks. Cos if it were so cheap and easy, the companies would have very well used the closed-loop system instead of the open-loop system.

vibhanshu · 01-21-2009, 07:03 PM

Quote:

Originally Posted by Aparajith

The sensor may be available, but how do u plan to attach it to the ECU? The ECU should support these inputs and calculate the fuel inputs accordingly.

Thats what my question is

Trying to know the Ins and Out of the bike.

12-28-2008, 11:18 AM	#21 (permalink)
BANDHAV The Master of His Universe Join Date: Sep 2008 Location: Ghaziabad Posts: 1,622	^^Endless desires, man someone who has already been there and done 148 kmph on his stock baby R1, wandering around to increse the performance by that extra bit. Sagar bahi ab kya irada hai ?? __________________ Yes, i blog too..

01-05-2009, 04:24 PM	#23 (permalink)
Joel Race Concepts Join Date: Jun 2004 Location: Bangalore Posts: 1,759	The R15 has 5 sensors. Crank position sensor, Throttle position sensor, Intake pressure sensor, Intake temperature sensor and coolant temperature sensor. Its an open loop system and can never adjust to additional changes. Adding a freeflow filter will lean out the mixture even further. You will need to manually richen the mixture by changing the AFR. The R15 does not have an O2 sensor to automatically vary the AFR. Open loop systems are cheaper and widely used on low capacity engines. __________________ joel@raceconcepts.in

01-20-2009, 04:47 PM	#26 (permalink)
prashanth_benz Nutty Rider Join Date: Feb 2005 Location: chennai, tamilnadu, India. Posts: 111	Damn man...i thought the only simple mod that could be done to an R15 was the filter...now even that seems to be a complex affair....btw...can a aftermarket lambda(O2) sensor be fitted to the R15's system ..?? __________________ '68 Jawa 250 ,'76 Yezdi 250, '85 RD350, '88 RD350 , '95 TZR250 3XV, '01 RX 135 5speed, '05 Pulsar 180Dtsi V1 "You live more in five minutes on a bike like this(Indian Scout) going flat out than some people live in their lifetime" - Burt Munro

01-20-2009, 06:38 PM	#27 (permalink)
Xenologik has an Itch. Join Date: Apr 2008 Location: Aapnu Amdavad, Gujjuland. Posts: 534	that would require an entire change in the system.. after all the ECU has to understand the sensor to actually do something ! not possible practically i reckon. but note that you CAN change the AFR by some instrument Killer has mentioned. but you have to know who has such an instrument ! __________________ Ride Safe, Ride Long. P220 sig coming up soon :P Never argue with an idiot, he'll bring you down to his level and beat you with his experience.

01-21-2009, 04:33 PM	#29 (permalink)
Aparajith RIP Kriss :( Join Date: Jan 2007 Location: Chennai Posts: 1,866	The sensor may be available, but how do u plan to attach it to the ECU? The ECU should support these inputs and calculate the fuel inputs accordingly. I do not think it is as easy and cheap as it looks. Cos if it were so cheap and easy, the companies would have very well used the closed-loop system instead of the open-loop system. __________________ Democracy is when 2 wolves and a sheep meet to decide who is for dinner. Liberty is when the sheep has a gun.

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