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SVTPerformance's Chain of Restaurants
The Blower Bistro
Explain boost/psi to me!
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<blockquote data-quote="SteedaX47" data-source="post: 15253355" data-attributes="member: 132755"><p>Different blowers/turbos have efficiency ranges, as they can only flow so much air. take a stock m112 from a terminator. its almost right at its efficiency peak from the factory at 8psi on the dohc 4.6. any more than 14psi and youre really only blowing hot air.</p><p></p><p>Think of a garden hose. you can make a small diameter hose flow just as much or more than a larger hose if you apply enough pressure to the smaller one right? but eventually, youll hit the maximum flow for that hose and wont really be able to force more water through it, whereas on the larger hose, the same pressure can flow more water. make sense?</p><p></p><p>so... lets take a larger supercharger, say a whipple 2.9, it has a MUCH higher efficiency range and will make more power than the eaton at the same 14psi since it will be pushing cooler air into the manifold. but 14psi on a 2.9 isn't quite in its efficiency range yet so its really not doing the job it could do. so lets bump up the boost to... 18psi. now its about in the operating range it should be and will make great power while probably having cooler (or close to) air going into the intake than the eaton at only 14psi.</p><p></p><p>same thing can be said about the 3.4 vs the 2.9 along with turbos vs superchargers.</p></blockquote><p></p>
[QUOTE="SteedaX47, post: 15253355, member: 132755"] Different blowers/turbos have efficiency ranges, as they can only flow so much air. take a stock m112 from a terminator. its almost right at its efficiency peak from the factory at 8psi on the dohc 4.6. any more than 14psi and youre really only blowing hot air. Think of a garden hose. you can make a small diameter hose flow just as much or more than a larger hose if you apply enough pressure to the smaller one right? but eventually, youll hit the maximum flow for that hose and wont really be able to force more water through it, whereas on the larger hose, the same pressure can flow more water. make sense? so... lets take a larger supercharger, say a whipple 2.9, it has a MUCH higher efficiency range and will make more power than the eaton at the same 14psi since it will be pushing cooler air into the manifold. but 14psi on a 2.9 isn't quite in its efficiency range yet so its really not doing the job it could do. so lets bump up the boost to... 18psi. now its about in the operating range it should be and will make great power while probably having cooler (or close to) air going into the intake than the eaton at only 14psi. same thing can be said about the 3.4 vs the 2.9 along with turbos vs superchargers. [/QUOTE]
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SVTPerformance's Chain of Restaurants
The Blower Bistro
Explain boost/psi to me!
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