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Horsepower vs speed

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Old Dec 17, 2013 | 03:51 PM
  #21  
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Originally Posted by cannon11
I would think so too, here is the website I got it from
http://www.howstuffworks.com/1969-corvette1.htm
This site which started this conversation is comparing a 69 L-48 automatic to a 75 L-82 4 speed.
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Old Dec 17, 2013 | 04:54 PM
  #22  
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so a 3.08 gear to a 3.55 or lower gear, that sure will make a difference, and the engine selection. and traction.
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Old Dec 17, 2013 | 06:43 PM
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Originally Posted by bb62
The 300HP (Gross) 69 would be lower than 260HP Net you suggest. Consider that in 1971 GM published both sets of numbers. The base Corvette measured 270HP Gross but only 210HP Net for a 60HP difference. The same would be true of the 69. It would really be putting out closer to 240HP.

You should also know that the 69 used 2" exhausts rather the the 2 1/2" exhausts previously used. While this did not affect the base models, it had a big effect on the higher HP engines. This is one reason why 69 magazine test are generally slower than comparable 68 tests and invariably slower than 66/67 tests.
I thought that 65 was the last year for the 2.5 exhuast manifold, so 66 and on up had the 2" manifold,
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Old Dec 18, 2013 | 12:00 AM
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Originally Posted by 1977L48
so a 3.08 gear to a 3.55 or lower gear, that sure will make a difference, and the engine selection. and traction.
The turbo 400 is a strong trans but is a power sucker, not sure if this is correct but I read somewhere that it "consumed" 40 hp so this also favours the 4 speed car.
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Old Dec 18, 2013 | 12:50 PM
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ive hurd that as well, th350 takes 25hp, TH400 takes 35-40hp, 700r4 i read that it takes 75HP!
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Old Dec 18, 2013 | 08:29 PM
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Convertibles did have extra braces for the birdcage and metal added to the front part of the tunnel. Lou.
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Old Dec 18, 2013 | 09:28 PM
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So, am I right to assume that the topic of "speed" isn't actually going to enter into the discussion?
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Old Dec 18, 2013 | 11:25 PM
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Originally Posted by loup68
Convertibles did have extra braces for the birdcage and metal added to the front part of the tunnel. Lou.
That accounts for about 5 pounds or so. And the complete top weighs around 75-80 ? pounds. At least thats what it felt like last time I moved it , so I'd like to know where the extra weight for the convertable mith came from.
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