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<blockquote data-quote="shiroitenshi" data-source="post: 1063363781" data-attributes="member: 27518"><p>Usually gauge pressure reads absolute pressure, not atmospheric. Some boost meters got the lower than 1bar atmospheric portion, so can't say all of them don't read atmospheric. MAP sensors read atmospheric pressure. less than 1 bar atmospheric is also known as vacuum on cars, though this is not exactly true (lower atmospheric actually), but the term so widely used, it's hard for me to not use it.. :P (e.g. <u>vacuum</u> log/tube/canister on ITBs.)</p><p></p><p>1 bar atmospheric means zero boost. :).</p><p></p><p>Don't usually hit 1 bar atmospheric that on NA tho, unless the CAI is routed to the front bumper face, directly, not the hose + open pod inside. usually 900+mBar on most normal cars, unless there's massive restrictions on the intake to the MAP sensor.</p><p></p><p>the supercharger part I've seen before, VectorX2, I'm wondering how they drive the supercharger pulley. without removing a/c or power steering. the picture you've shown shows a LONG belt lol.. I wonder how's the maintainance on those is.. AFAIK, longer belt = easier to strech = shorter life...</p></blockquote><p></p>
[QUOTE="shiroitenshi, post: 1063363781, member: 27518"] Usually gauge pressure reads absolute pressure, not atmospheric. Some boost meters got the lower than 1bar atmospheric portion, so can't say all of them don't read atmospheric. MAP sensors read atmospheric pressure. less than 1 bar atmospheric is also known as vacuum on cars, though this is not exactly true (lower atmospheric actually), but the term so widely used, it's hard for me to not use it.. :P (e.g. [U]vacuum[/U] log/tube/canister on ITBs.) 1 bar atmospheric means zero boost. :). Don't usually hit 1 bar atmospheric that on NA tho, unless the CAI is routed to the front bumper face, directly, not the hose + open pod inside. usually 900+mBar on most normal cars, unless there's massive restrictions on the intake to the MAP sensor. the supercharger part I've seen before, VectorX2, I'm wondering how they drive the supercharger pulley. without removing a/c or power steering. the picture you've shown shows a LONG belt lol.. I wonder how's the maintainance on those is.. AFAIK, longer belt = easier to strech = shorter life... [/QUOTE]
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