Mythbusters Tests The Porsche 928's Aerodynamics... In Reverse
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Racer
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The Mythbusters crew and Popular Mechanics will test later this month the old claim that the Porsche 928 could go faster if driven backwards. To do so, they spent a week flipping a 928's body to face the wrong direction
http://jalopnik.com/5680757/mythbust...ics-in-reverse
check it out here....
Courtesy pf Jalopnik.com
http://jalopnik.com/5680757/mythbust...ics-in-reverse
check it out here....
Courtesy pf Jalopnik.com
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We must have been typing at the same time!
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I just posted on the other thread. The car is at SEMA in Vegas. Pictures in the other thread...
https://rennlist.com/forums/8027468-post5.html
https://rennlist.com/forums/8027468-post5.html
#7
Dean of Rennlist, "I'm Listening"
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Couldn't they just place it backwards in a wind tunnel?
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#9
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At 75 mph, the original 1978 928 was losing 28 hp to drag, a noticeable deficit given its 219-hp engine.
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From Theo ( And Rick )
Quote:
I found a list by Markus (MG) from the list put together by the 911 meeting that is quite interesting and contains a lot of Cd values:
Air resistance factor (Cd) x Front surface (A) m2 = air resistance index
356/1 GMÜND 1948 (open with 2 persons): 0.45 x 1.41 = 0.648
356/2 GMÜND Coupé and Cabrio 1948 to 1950: 0.29 x 1.62 = 0.469
356 to MJ 1952: 0.296 x 1.677 = 0.496
356 to MJ 1955: 0.365 x 1.692 = 0.618
356 Speedster to MJ 1958. Convertible D 1959: 0.377 x 1.640 = 0.618
356 A: 0.365 x 1.692 = 0.618
356 B: 0.398 x 1.611 = 0.641
356 B roadster: 0.386 x 1.599 = 0.617
356 B 1600 GS Carrera GTL (Abarth): 0.389 x 1.495 = 0.581
356 C: 0.398 x 1.611 = 0.641
550 R-S Spyder: ?
904 Carrera GTS: 0.383 x 1.401 = 0.536
914.1.7 (also 914/6, 914/8, 914/8 SII) MJ 1970 to MJ 1973: 0.38 x 1.60 = 0.608
914.2.0 MJ 1973 and 1974: 0.38 x 1.60 = 0.608
914.2.0 MJ 1975 and 1976: 0.377 x 1.60 = 0.603
924 (MJ 1976 to 1979): 0.36 x 1.76 = 0.634
924 (starting from MJ 1980): 0.33 x 1.79 = 0.591
924 turbo (931): 0.34 x 1.79 = 0.609
924 Carrera GT (937): 0.34 x 1.82 = 0.619
924S (946): 0.33 x 1.81 = 0.597
944 (also S) MJ 1982 to 1989: 0.35 x 1.82 = 0.637
944 turbo (951) (also S2, turbo S, 968 CS, 968 turbo S): 0.33 x 1.89 = 0.624
944 S2 Cabrio MJ 1989 to 1991 (also S2 Cabrio, turbo Cabrio, 968 Cabrio): 0.36 x 1.87 = 0.673
928 MJ 1978 to 1982: 0.41 x 1.95 = 0.799
928 S MJ 1980 to 1986: 0.38 x 1.95 = 0.741
928 S4 MJ 1987 to 1991 (also CS. GT): 0.34 x 1.98 = 0.673
928 GTS MJ 1992 to 1995: 0.35 x 2.02 = 0.707
986 Boxster: 0.31 x 1.93 = 0.598
986 Boxster S MJ 2000 to 2002: 0.32 x 1.93 = 0.617
987 Boxster: 0.29 x 1.96 = 0.57
987 Boxster S: 0.30 x 1.97 = 0.59
987 Cayman S: 0.29 x 1.98 = 0.57
955 Cayenne (V6) MJ 2004: 0.38 x 2.78 = 1.056
955 Cayenne S (and turbo) MJ 2003 + 2004: 0.39 x 2.78 = 1.084
901 1964: 0.363 x 1.685 = 0.612
911 MJ 1965 to 1967 all types (also Targa and S): 0.363 x 1.685 = 0.612
911 MJ ' 68 (all types): CD x A (m2) = 0.381 x 1.6853 = 0.642
912: Similar to 911 of respective model years
911 MJ ' 69-'73: Cd x A (m2) = 0.408 x 1.71 = 0.697
911 RS MJ 1973: 0.397 x 1.73 = 0.686
911 MJ 1974 to MJ 1977 (also S. Targa): 0.39 x 1.76 = 0.686
911 SC MJ 1978 to MJ 1983 (also Targa and Cabrio) and Carrera MJ 1974 to MJ 1977: 0.40 x 1.77 = 0.708
911 Carrera 3.2 MJ 1984 to MJ 1989: 0.39 x 1.77 = 0.690
911 Carrera 3.2 MJ 1984 to MJ 1989 with front and tail spoiler (also Clubsport):0.38 x 1.77 = 0.672
911 turbo (930) (also WTL, SC/RS, turbo slant nose): 0.39 x 1.86 = 0.725
959: 0.31 x 1.92 = 0.595
964 (also R-S. R-S America, R-S N/GT): Cd x A (m2) = 0.32 x 1.79 = 0.573
964 turbo (994). (Frere): Cd x A (m2) = 0.35 x 1.88 = 0.658
964 turbo (994) (also WTL, Jubi) (Bongers): 0.36 x 1.89 = 0.680
964 turbo S lightweight construction (994) (also R-S 3.8. turbo 3.6, turbo 3.6 low rise building): 0.35 x 1.89 = 0.662
993 (also R-S): 0.33 x 1.86 = 0.614
993 R-S Clubsport (with rear wing 0 Angle of incidence): 0.34 x 1.86 = 0.632
993 R-S Clubsport (with rear wing 9 Angle of incidence): 0.36 x 1.86 = 0.669
993 GT 2: 0.34 x 2.04 = 0.684
993 turbo (also 2S. 4S, turbo Cabrio): CD x A (m2) = 0.34 x 1.93 = 0.656
996: Cd x A (m2) = 0.30 x 1.94 = 0.582
996 4S: 0.30 x 2.00 = 0.60
996 GT 2: 0.34 x 1.96 = 0.666
996 GT 3 MJ 1999 to 2001: 0.30 x 1.95 = 0.585
996 turbo: 0.31 x 2.0 = 0.62
997: 0.28 x 2.00 = 0.56
997 Cabrio: 0.29
997S: 0.29 x 2.00 = 0.58
997S Cabrio: 0.29
980 Carrera GT: 0.396 x 1.94 = 0.768
Theo
1988 928S4 cherry talk
The Netherlands