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Dump valves?
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[quote][i]Originally posted by tiga77[/i] If your car has got an 'air flow meter' then with an aftermarket dump valve (BOV) you are essentially blowing out 'metered' air through the D/Valve. When this happens there will be more fuel in the chamber and less air than needed - this is running rich. So the engine will then retard the air fuel mixture to account for the lack of air by reducing the fuel - thus running lean. So as this keeps happening the air/fuel mixture is constanly being messed about. This incorrect mixture causes detonation and as a result kills your pistons etc. Also if you have an air flow meter and a atmospheric dump valve the car will run like crap and stall all the time etc. That is why I cant run one on my mr2 turbo. It is more about looking after your engine than 'losing performance'. However if you dont have an air flow meter you are fine. :D Impreza's, early MR2 turbos etc all have air flow meter so it is not recommended to put an atmospheric dump valve on. Dont know about evos tho sos. HTH ;) [/quote]
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