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Toymods member
I supported Toymods
Location:
Rydalmere, NSW
Registered:
May 2002
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Re: BOV's & Wastegates
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Mon, 03 June 2002 04:34
 
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Yeah I think it's the EPA rule that governs "noise pollution", and trucks and their exhaust brakes fall under the same category.
Only problem with that is in some places (where a truck route and a residential area meet, for instance), there will be signs out saying "Please Minimise Compression (or exhaust) Braking"; there isn't anything that says "atmospheric BOV's are an EPA offence (or illegal?)"  Personally I don't know why someone would want to ban atmospheric BOV's (or limit their use) - I think they sound great.  For safety reasons you can't immobilise a truck's compression exhaust, nor would you want to as it's the only thing that gets them to the bottom of hills safely (in low gear, without foot-brakes). So in this instance you can't take the exhaust brake off the truck, but you can take the BOV off the turbo; and for the same reasons (well, getting the most out of your investment) you wouldn't want to take it off.
Alright, so what does a plumb-back BOV sound like in comparison to an atmospheric BOV? 
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