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Sancho
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Sancho Jul 26, 1:05am - #232153 

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2004 Toyota Celica GT

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Butterfly valve

Just removed the butterfly valve from my air box. I've been procrastinating long enough, so just ripped it out in a couple minutes. Can't notice too much of a difference in sound, but i'll try it again tomorrow. CEL didn't come on, so all is good. My question is, what should I do with this valve? Anybody want it? I could sell it to you for the cost of shipping and handling. rofl thumbsup

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Haulin_A_Doo
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Haulin_A_Doo Jul 26, 1:35am - #232154 
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Probaby not worth anything because everyone had taken them off their celi's. Toss it in the trunk for the next owner incase they live in Michigan & need it for the cold winters. grin
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Chelica815
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Chelica815 Jul 26, 2:26am - #232155 
2000 Silver Toyota Celica
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I still have mine installed. Would it void warranty if I was to take it off? What does it do anyways?

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Haulin_A_Doo
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Haulin_A_Doo Jul 26, 2:28am - #232156 
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It reduces air flow when its cold. Kinda works like a choak, changing the air fuel mixutre.

I don't think it would void your warrantee if you removed it.
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Polykarb
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Polykarb Jul 26, 3:23am - #232157 

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nah, that valve has nothing to do with emissions. Will not void warranty

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Sancho
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Sancho Jul 26, 4:43am - #232158 

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2004 Toyota Celica GT

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Originally Posted by Polykarb
nah, that valve has nothing to do with emissions. Will not void warranty


Originally Posted by isaac
The "butterfly is a plastic part located inside the air box that is recognizable by the small white flap in the middle. This is a very minor modification which has not shown any significant power gains but results in a deeper sound when accelerating it was placed there by Toyota to help MPG by reducing the amount of air that enters the engine & to keep the car a little quieter at RPMs below 3500.


idunno

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hector
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hector Jul 26, 4:47am - #232159 

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whats the butterfly valve...anyone have pics? never heard of this... spineyes
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DiabloGTS
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DiabloGTS Jul 26, 4:48am - #232160 

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it also steadies the idle on a GTS at low rpm's

If you remove it, you will lose vacuum pressure on the GTS when coming to a stop and the power brakes activate.

It's the reason the cars bog down to 400 RPM

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Sancho
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Sancho Jul 26, 5:13am - #232161 

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2004 Toyota Celica GT

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Originally Posted by hector
whats the butterfly valve...anyone have pics? never heard of this... spineyes


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The white thing in the air box wave

Heres the uninstall
https://www.celicahobby.com/ubbthreads/thread.f_57307_0_collapsed_2__1.html

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Chelica815
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Chelica815 Jul 26, 6:33am - #232162 
2000 Silver Toyota Celica
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So removing it will give me better sound but worst MPG?

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jrock
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jrock Jul 26, 8:32am - #232163 
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hey diablo, could you clarify that for me, cause i have a gts; it bogs it down...me lost now
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nyckaminari
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nyckaminari Jul 26, 2:29pm - #232164 
2002 Silver Toyota Celica GT
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The MPG was about the same when I removed mines. It will be slightly louder and adds 1-2 hp, I heard...
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Sancho
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Sancho Jul 28, 12:44am - #232165 

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2004 Toyota Celica GT

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Originally Posted by Chelica815
So removing it will give me better sound but worst MPG?


Yep! It was there as a choke to control air flow. Fast cars have bad MPGs, while economy cars are the opposite. Let more air in, you're burning fuel faster (Need oxygen to fuel fire, same with combustion). The sound is similar to a CAI, but not as deep. Better off getting a new Intake and ripping the airbox out for more gains. 1-2 hp gains without the butterfly are bs. It hasn't been dyno'd.

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Larry_GTS
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Larry_GTS Jul 28, 12:55am - #232166 
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I did that today to
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TheAnswer
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TheAnswer Jul 28, 1:41am - #232167 

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So in general you should leave it on or remove it?
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sickcelica696
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sickcelica696 Jul 28, 1:53am - #232168 
2000 Liquid Silver Toyota Celica
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remove it
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