new turbo program ... caution (dave -n) - Saab Performance Bulletin Board - Saabnet.com
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the map 'points' should be plotted at the correct PR to be useful. he plots them at the ratio of boost to ambient, which is lower. for your 18 psi sheet, 16 psi at 6000, correct PR=2.3, where he uses about 2.0 .
also, his temps are way off on that 18 psi sheet. turbo out is 311F vs his 238F, and manifold temp is 175F vs his 146F.
also appears he uses wrong mass flow correction formula to adjust lb/min to enter map on x-axes, but lucks into correct value in this case with other wrong numbers.
I'd request full documentation of his method.
posted by 52.128.3...
turbo calculator ... outputs
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