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Post by stoffe64 on Mar 19, 2017 10:33:40 GMT -5
Hello everyone, i am confused now,what is The recommended calculations, 3 Times inducer area or 2 Times the inducer area
Bigger turbos you calculate With twice the inducer area,how is it really With this?
Cheers stephan
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Post by racket on Mar 19, 2017 15:53:20 GMT -5
Hi Stephan
Jetspecs gave different ratios because small turbos often don't produce the same high pressures as larger turbos , the small ones aim for very wide map widths suitable for SI engines whereas CI engines have narrower requirements so the comp can be designed more for higher pressures .
Use 3 times inducer area as the cross sectional area of your flamtube and you should be OK .
Cheers
John
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CH3NO2
Senior Member
Joined: March 2017
Posts: 455 
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Post by CH3NO2 on Apr 1, 2017 20:22:58 GMT -5
Jetspecs?... I've seen it referenced several times in this forum. Is this a publication or app?
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CH3NO2
Senior Member
Joined: March 2017
Posts: 455
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Post by CH3NO2 on Apr 1, 2017 21:29:09 GMT -5
Never mind. Found it!
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Post by racket on Apr 1, 2017 22:06:21 GMT -5
Jetspecs is a fairly dated bit of info , we put it together years ago as a means of allowing guys to build a running engine first time, its still relevant but there are more sophisticated ways of making a flametube , though power output mightn't be all that much different than a Jetspecs one . Jetspecs was based on the combustor info here jetandturbineowners.proboards.com/thread/680/diy-turbinesCheers John |
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