AlexJames Posted October 25, 2007 Share Posted October 25, 2007 ok, this ones been confusing me for a while. My Supra has an atmospheric Dump Valve on it, alot of the supras that I see around or have seen on videos on here dont (unless they are really quiet)... I know that with MR2s its quite bad for them and can make the fuel economy go through the roof.. is it the same with supras? Should I change the atmospheric for a re-circulating one? Link to comment Share on other sites More sharing options...
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