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Old 03-04-2010, 09:29 PM   #1
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Joined: Oct 2007
From: from Wa, living on Grenada (island)

I Ride: 1991 XR250L, 2007 BMW F800S, 1999 ATK 605 ESDS/SM
trick air intake temp sensor to richen fuel?
Alright....i guess this could work. But for me, if it were this simple, everyone would be doing it. It just seems like a bad idea to me.

a device such as the booster plug



takes the ambient temp, and the air intake temp, and lowers the *apparent* intake temp that the bike sees so that the bike will richen the fuel mixture.


I know of people that claim it really smoothed out their bike. Idk though....thoughts?

http://www.boosterplug.com/index.html


what do you guys think? The only reason I would think this specific one would work is because it varies the added resistance with the ambient temperature.

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Last edited by Avboden; 03-04-2010 at 09:33 PM..
 

Old 03-04-2010, 09:47 PM   #2
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From: Spokane Valley

I Ride: Suzuki Boulevard C90, Suzuki DRZ400E, My Wife's Scooter
$150!?!

Why not just get one of the "other solutions" for a bit more (my TFI tuner was only 10% more.)

Seems like an awful expensive gimmick when a true tuner isn't that much more.

KevinD

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Old 03-04-2010, 09:57 PM   #3
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Joined: Mar 2006
From: spokane, wa

I Ride: 2013 Gasgas 300xc w/lic plate + 1985 RZ350 + 2010 YZ250F +
it is similar to what a power commander does, except on the opposite side of the air flow.

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Old 03-04-2010, 11:36 PM   #4
Chicken Strips
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Joined: Apr 2006
From: Seattle, WA

I Ride: Too many
Yeah, works just fine, and older power commanders did similar things (mess with sensor input to change fuel map).

"Dry Shot" nitrous systems can be aimed at the temp sensor to get a little richer mixture with the N02.

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Old 03-05-2010, 07:53 AM   #5
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From: Muk, WA
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I Ride: fast, except on the road.
Common hot rodding trick on cars. I'd go with a PC because you can adjust specific points up or down. Aftermarket exhaust often cause rich spots, as well as lean.

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Old 03-05-2010, 08:41 AM   #6
Shredder
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Joined: Jul 2005
From: The Mad Scientists Workshop

I Ride: A desk
Get a tuner (PcIII, PcV, Yosh) and put it on the dyno.... do it right.

Personally I'd like the Yosh, but I can't afford it.

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Old 03-05-2010, 09:02 AM   #7
Licensed
 
Joined: Feb 2009
From: Puyallup, WA

I Ride: 2007 Kawasaki ZX6R
Is this similar to the EBay 29 cent resister (or "booster chip") for your car that is supposed to do the same thing? You know, the one they charge $39.99 for.

I believe it fools your car into thinking the air going into the engine is cooler, therefore the computer adjusts the fuel/air mixture to give you more horsepower.

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Old 03-05-2010, 09:05 AM   #8
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Joined: Mar 2007
From: Monroe-mish, WA
Blog Entries: 5

I Ride: 07 YZ450F, 74 XL350
I think I saw something similar to this made up on the "powerblock" on spike the other weekend...a quick search of their website didn't show anything....I didn't see the beginning or end of the segment, but they were doing something with the airflow sensor for go-fast goodness...

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Old 03-05-2010, 03:12 PM   #9
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Joined: Sep 2007
From: Kent, WA

I Ride: 05 KTM 625 SMC
From what it looks like, it's a just a thermistor. I wouldn't use it.

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Old 03-05-2010, 03:18 PM   #10
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Joined: Oct 2007
From: from Wa, living on Grenada (island)

I Ride: 1991 XR250L, 2007 BMW F800S, 1999 ATK 605 ESDS/SM
“ Quote:
Originally Posted by ZXWUT? View Post
From what it looks like, it's a just a thermistor. I wouldn't use it.

why not? I get that it's sketch...I just don't feel like it would be a good idea. but WHY...that is the question

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Old 03-05-2010, 03:26 PM   #11
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Joined: Sep 2007
From: Kent, WA

I Ride: 05 KTM 625 SMC
“ Quote:
Originally Posted by Avboden View Post
why not? I get that it's sketch...I just don't feel like it would be a good idea. but WHY...that is the question
Just from the looks of it, it can be set for a baseline value and the difference is made from the varying resistance of the thermistor so it can only be set for a specific value that carries throughout the rpm's. I could be totally off though, I don't know what is actually in the box.

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Old 03-05-2010, 03:27 PM   #12
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From: Muk, WA
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I Ride: fast, except on the road.
It appears to have an adjustment knob, how are you going to know how rich to make it? Are you going to install a wide range O2 sensor too? And you may have to adjust it for different power settings? It just seems like a lot of $ for a halfassed device?

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Old 03-05-2010, 04:13 PM   #13
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Joined: May 2008
From: South Salem Oregon

I Ride: Aprilia Tuono, Ducati GT1000, Moto Guzzi Centauro, Bimota DB4, Yamaha FJR1300
It looks like an anal probe!

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Old 03-05-2010, 04:15 PM   #14
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Joined: Oct 2007
From: from Wa, living on Grenada (island)

I Ride: 1991 XR250L, 2007 BMW F800S, 1999 ATK 605 ESDS/SM
“ Quote:
Originally Posted by PeteN95 View Post
It appears to have an adjustment knob, how are you going to know how rich to make it? Are you going to install a wide range O2 sensor too? And you may have to adjust it for different power settings? It just seems like a lot of $ for a halfassed device?
I guess the knob is for the baseline. And it's meant for BMWs which already have a wideband o2 sensor and adjust acordingly.

“ Quote:
Originally Posted by ZXWUT? View Post
Just from the looks of it, it can be set for a baseline value and the difference is made from the varying resistance of the thermistor so it can only be set for a specific value that carries throughout the rpm's. I could be totally off though, I don't know what is actually in the box.

Ahh that could be an issue. It doesn't change with the RPMs...then again the temperature has nothing to do with RPMs...that's what the O2 sensor helps to adjust the fueling.

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Old 03-05-2010, 07:15 PM   #15
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Joined: Sep 2007
From: Kent, WA

I Ride: 05 KTM 625 SMC
“ Quote:
Originally Posted by Avboden View Post
The temperature has nothing to do with RPMs...that's what the O2 sensor helps to adjust the fueling.
True, but the temperature will remain fairly stable so the fueling can't be changed at various rpms. It'll be one value all the way across.

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Old 03-05-2010, 07:37 PM   #16
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Joined: Aug 2007
From: Kent, WA

I Ride: like a newb
because alot of bikes ECU's (and i hope a BMW) will over time adjust the airfuel mixture based on an 02 sensor to keep it where it should be.

so it will be richer or leaner or whatever till the ECU adjusts itself (the same way it adjust for dirty/clean air filters etc...)

so over time, you waste your money! to gain nothing.

buy a real ECU tuner

-levi

ps. a sucker is born every day

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Old 03-05-2010, 08:16 PM   #17
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Joined: Jun 2006
From: The Ham

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Lots of bikes came stock with air intake temp sensors (like my TL). However just richening the fuel mixture won't necessarily make your bike run better/faster. You need the correct air/fuel ratio for your bike to burn the fuel correctly and efficiently. If these units are universal, they probably won't work that well, but if they're model specific there's no reason they shouldn't help if they're designed well.

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Old 03-05-2010, 09:43 PM   #18
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Joined: Feb 2005
From: West Richland

I Ride: Pitster Motard
How many bikes actually run closed-loop with an O2 sensor?

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Old 03-05-2010, 09:57 PM   #19
Chicken Strips
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Joined: Jun 2006
From: pullman, WA
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I Ride: 2008 yamaha r6, 2012 honda cbr250r
It'd be smarter to spend the dough on wideband o2.

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Old 03-05-2010, 10:43 PM   #20
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Joined: Mar 2009
From: Spokane Valley

I Ride: Suzuki Boulevard C90, Suzuki DRZ400E, My Wife's Scooter
“ Quote:
Originally Posted by Wrench View Post
How many bikes actually run closed-loop with an O2 sensor?
One's with catalytic converters have to.
I don't know about any others...

KevinD

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