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40mph in first?
I've clocked my car against the fiance's new Audi and have also used mile markers to be sure my speedo is correct. The results, it's about as close as it gets without being recalibrated by a shop.
So, here goes, at redline in first I'm going an indicated 42mph. I thought each gear was worth 30mph.? Theoretically, at redline in 5th I'm going to be doing 210mph!!!!!!! What's screwy with this equation?
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1987 Carrera, Guards Red, Black (sold but never forgotten!) 1965 356SC Coupe, Silver on Red |
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08-07-2003, 07:40 PM
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That's about right--I'm just over 40 in first, just over 70 in second. Some aerodynamic coeffient change thing is the real limiting factor, I think. It's enough for me to be able to break every posted speed limit in NC in second gear....
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A J Burns '07 Guards Red Carerra 4S 911 Coupe w/Aerokit '86 Iris Blue Carerra 911 Coupe (given to my son) '63 Morgan Tiger Cub w/original Atomic 4 |
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08-07-2003, 07:50 PM
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So on the Carreras, how fast are you going at each redline?
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1987 Carrera, Guards Red, Black (sold but never forgotten!) 1965 356SC Coupe, Silver on Red |
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08-07-2003, 07:52 PM
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Join Date: Jun 2003
Location: St Petersburg, FL
Posts: 3,814
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Hmm, if memory serves me correctly my 930 four speed can get up to about 50 MPH in first but I am bringing it down with a new ring and pinion.
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08-07-2003, 08:20 PM
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Join Date: Dec 1999
Location: TX USA
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AJ,
The G-50 Carreras are geared taller than your car ... don't try to match them in 1st gear! Your rod bolts won't take kindly to the resulting engine speeds! Here is an article you might be interested in ... http://forums.pelicanparts.com/showthread.php?s=&threadid=75241&highlight=84+carrera+test
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
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08-07-2003, 08:21 PM
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Back in the saddle again
Join Date: Oct 2001
Location: Central TX west of Houston
Posts: 55,975
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G50 Carrera speed per gear
Gear ratio rpm speed 1st 12.040 6200 38.1 1st 12.040 6500 39.9 2nd 7.083 6200 64.8 2nd 7.083 6500 67.9 3rd 4.847 6200 94.6 3rd 4.847 6500 99.2 4th 3.870 6200 118.5 4th 3.870 6500 124.3 5th 3.058 6250 151.2 5th 3.058 6500 157.2
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Steve '08 Boxster RS60 Spyder #0099/1960 - never named a car before, but this is Charlotte. '88 targa  SOLD 2004 - gone but not forgotten
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08-07-2003, 10:09 PM
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Back in the saddle again
Join Date: Oct 2001
Location: Central TX west of Houston
Posts: 55,975
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Formula to get speed is
speed=(rpm*tire dia in inches)/(336*gear ratio)
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Steve '08 Boxster RS60 Spyder #0099/1960 - never named a car before, but this is Charlotte. '88 targa SOLD 2004 - gone but not forgotten
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08-07-2003, 10:10 PM
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Quote:
/J
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Jocke Andersson Reach me on ICQ - 317860713 Porsche 930 -77 SOLD Modified, one of a kind in Sweden. Check out my car @: http://members.cardomain.com/jocke |
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08-07-2003, 10:58 PM
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Mama mia! 60 mph in first....
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Belgik 1988 Carrera 3.2L |
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08-08-2003, 02:22 AM
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My Sportomatic does 60mph in first too . How bizarre is that?
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08-08-2003, 03:23 AM
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1987 Porsche 911 3.2
1986 Porsche 911 3.2
1977 Porsche 930 3,0L Turbo
1988 Porsche 911 Carrera 3.2 litre 
1978 Porsche 911SC Targa 3.0ltr
