Talk:Blowoff valve

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Who keeps erasing these pictures? Its not rocket science here people, I added a few arrows to the original pictures and made the text more clear. Whoever is

[edit] Is a blow off Valve really improving your performance?

I am confused, Are blow off valves there for purely the sound? If they are supposed to improve engine performance, why don't the manufacturers add them to there vehicles? Even the Built for Performance Subaru WRX or STi don't add them. Should'nt the whoosh sound they make be going back into the engine for a good reason? Please advise/edit —Preceding unsigned comment added by 58.107.230.110 (talk) 09:08, 12 September 2007 (UTC)

--They do have them, pretty much every turbo car since the late 80's has. —Preceding unsigned comment added by 71.98.246.103 (talk) 17:24, 14 September 2007 (UTC)

[edit] Question:

Can blowwoff valve be installed on an automatic transmission? or do you have to have a manual transmission?  —Preceding unsigned comment added by 198.60.71.50 (talk) 16:02, 17 October 2007 (UTC) 

ANSWER: Blow Off Valves re there to limit compressor surge, which happens when boost is left in between the compressor side of the turbo, and the outside of the throttle body of the engine's intake, while vacuum is experienced inside the throttle body due to throttle being snapped shut from getting staight off the accelerator.

Both Manual and Auto's experience this, and in most modern turbocharged cars, both manual and auto's are fitted standard from the factory with plumb-back Blow Off Valves. —Preceding unsigned comment added by 122.105.122.17 (talk) 11:42, 24 March 2008 (UTC)