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Old 08-10-2010, 03:50 PM   #9
LTb1ow
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Applies to more older carbs, and mainly bikes, but the lack of back pressure causes more air flow to come through the carb and since a carb cannot adjust itself like an EFI system can. So air will become double loaded with fuel and make all sorts of nonsense.

Further more, although many will say dated, David Vizard claims that about .2psi is needed for a no hp loss exhaust system. But what do I know.
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