Turbo compressor map and 5-cyl calculations - Alfa Romeo Forum
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  • 1 Post By gionag
 
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(Post Link) post #1 of 1 Old 27-10-18 Thread Starter
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Brera '06 200hp

Turbo compressor map and 5-cyl calculations

Hello !

I am working of defining a more aggressive tune for the turbo, and i plan to do that with a proper calculation over compressor map.
I've got a chart for a GTB2056 (different AR though).

Made a useful (i think...) spreadsheet with graphic overlay to play around.

But a question arise in my head... all the formulas i've found around said that for the calculation of the Volumetric Flow rate i just use displacement and rpm (+VE%), but, in a 5 cylinder engine, there is a cross opening of the intake and i think on top of the calculate one i need to add another 25%... is that something right ?

Attached you can download the sheet i am using... let me know if my calculation and suppositions are right.
Don't mind the data in it... the inputs i've typed is just for a test
Attached Images
File Type: jpg turbo_chart.jpg (119.3 KB, 9 views)
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File Type: xls Turbo_chart_overlay.xls (110.0 KB, 11 views)
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5cyl , calculations , compressor , map , turbo

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