Can someone explain how to read a turbo map?
10-01-2003, 09:07 PM
#1
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Can someone explain how to read a turbo map?
Saw one of these today and stared at it for a while...can anyone interpret these? Just out of curiousity...
<a href="http://home.comcast.net/~s4what/images/s4-k03_lg.jpg">Example 1 (K03)</a>
Example 2: (Garrett T3-60)
<img src="http://cherrypicker.tripod.com/sitebuildercontent/sitebuilderpictures/t3-60-cm.jpg">
<a href="http://home.comcast.net/~s4what/images/s4-k03_lg.jpg">Example 1 (K03)</a>
Example 2: (Garrett T3-60)
<img src="http://cherrypicker.tripod.com/sitebuildercontent/sitebuilderpictures/t3-60-cm.jpg">
10-01-2003, 09:11 PM
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Try this thread and the one this refers to ..
<ul><li><a href="https://forums.audiworld.com/performance/msgs/57404.phtml">https://forums.audiworld.com/performance/msgs/57404.phtml</a</li></ul>
10-01-2003, 09:12 PM
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this turbo is most efficient 74% between 78K rpm and 132K rpm
that is the ideal range to keep the turbo spooled or to get it to operate in. Beyond that rpm range it looses efficiency or under that range it loses efficiency.
I think you're looking at a variable geometry turbine. If you look at a turbo you will usually see 2 different shaped blades on the compressor side.
I think you're looking at a variable geometry turbine. If you look at a turbo you will usually see 2 different shaped blades on the compressor side.
10-01-2003, 09:13 PM
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Why is it better to be near the middle than the top
It looks like the T3 can flow up to 30lbs/min but the efficient circle only goes to 25...I guess my question is what determines efficiency? Why isn't there a direct correlation between the throughput on the turbine side and the flow through the compressor?
10-01-2003, 09:19 PM
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it depends on the aerodyamics of the turbine.
The MFG designs a turbo for a particular application or range of applications which have a given set of requirements and parameters.
The KKK KO3 and KO4 are designed for engines in a certain displacement range because that determines the exhaust output and the air input requirements of the engine in quesiton. A turbo is mechanically a simple device, however mathematically its quite complex. The fins are designed to move air at a particular rate when spun at a particular speed (driven by the exhaust gas turbine on the other side of the shaft)
This is one of those balance things, there is no perfect one size fits all turbocharger. Spool up time, CFM, PSI, operating efficiency, blade geometry.... there are a long list of things that are worked into the equation when engineering one of these things.
The KKK KO3 and KO4 are designed for engines in a certain displacement range because that determines the exhaust output and the air input requirements of the engine in quesiton. A turbo is mechanically a simple device, however mathematically its quite complex. The fins are designed to move air at a particular rate when spun at a particular speed (driven by the exhaust gas turbine on the other side of the shaft)
This is one of those balance things, there is no perfect one size fits all turbocharger. Spool up time, CFM, PSI, operating efficiency, blade geometry.... there are a long list of things that are worked into the equation when engineering one of these things.
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What RPM should the turbo kick in? It feels kinda jerky to me, but then I've never owned a turbo bef
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