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Drag coefficient for a 122 120-130

posted by uncle_bagley on Tue Oct 9 17:22 CST 2007
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last visit: Fri Oct 24 09:32 CST 2014

[RELATED]

My son and I have been having this on again, off again debate about how much power his ’69 Amazon really needs and how best to get there. We have been all around the mulberry bush during this discussion, everything from super/turbocharging the B20 to a B230 turbo, with just about everything in between. (The car currently has a 1974 B20B which vlvworld suggests generates 97 hp at 5800 rpm.)

In an attempt to move our discussion from the right side of our brains to the left, I have been generating some speed vs. hp curves. My objective is to show that infinite amounts of power are not required to get speeds well in excess of what I like to see him driving at. One of the pieces of info I’m missing in my calculations is the drag coefficient for a 122. I have been using .5 as a default value but I’ve no idea of whether this is wildly optimistic or in the ball park. FWIW a Hummer H2 has a drag coefficient of .57.

Anybody have a number they can trace to a reliable source? Or a better gut feel than mine? Maybe some of you racer types?

Thanks,
--
Barry -- 1967 122S 'Betty'

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Drag coefficient for a 122 [120-130]
posted by uncle_bagley subscriber on Tue Oct 9 17:22 CST 2007 >

Drag coefficient for a 122 [120-130]
posted by B20Paul. subscriber on Tue Oct 9 20:18 CST 2007 > V
- Drag coefficient for a 122 [120-130]
  posted by JohnMc on Wed Oct 10 01:13 CST 2007 > V
  - Drag coefficient for a 122 [120-130]
    posted by walrus3 subscriber on Wed Oct 10 08:35 CST 2007 > V
    - Drag coefficient for a 122 [120-130]
      posted by Gary L subscriber on Wed Oct 10 14:07 CST 2007 > V
      - Drag coefficient for a 122 [120-130]
        posted by T.Lyttle on Wed Oct 10 14:59 CST 2007 > V
  - Drag coefficient for a 122 [120-130]
    posted by B20Paul. subscriber on Thu Oct 11 18:02 CST 2007 > V
- Drag coefficient for a 122 [120-130]
  posted by uncle_bagley subscriber on Wed Oct 10 08:50 CST 2007 > V
  - Drag coefficient for a 122 [120-130]
    posted by B20Paul. subscriber on Thu Oct 11 17:30 CST 2007 > V
    - Drag coefficient for a 122 [120-130]
      posted by EJO on Thu Oct 11 23:56 CST 2007 > V

Drag coefficient for a 122 [120-130]
posted by sdewolfe subscriber on Tue Oct 9 21:39 CST 2007 > V
- Drag coefficient for a 122 [120-130]
  posted by uncle_bagley subscriber on Wed Oct 10 08:49 CST 2007 > V

Drag coefficient for a 122 [120-130]
posted by someone claiming to be nate on Wed Oct 10 09:38 CST 2007 > V
- Drag coefficient for a 122 [120-130]
  posted by Gary L subscriber on Wed Oct 10 11:00 CST 2007 > V

Drag coefficient for a 122 [120-130]
posted by Gary L subscriber on Wed Oct 10 10:45 CST 2007 > V
- Drag coefficient for a 122 - Gary (and others) were right! [120-130]
  posted by uncle_bagley subscriber on Mon Oct 15 04:53 CST 2007 > V
  - Drag coefficient for a 122 - Gary (and others) were right! [120-130]
    posted by Gary L subscriber on Mon Oct 15 10:29 CST 2007 > V

Drag coefficient for a 122 [120-130]
posted by JohnMc on Thu Oct 11 02:16 CST 2007 > V
- Drag coefficient for a 122 [120-130]
  posted by Champ 6 on Thu Oct 11 08:45 CST 2007 > V
  - Drag coefficient for a 122 [120-130]
    posted by JohnMc on Thu Oct 11 09:02 CST 2007 > V
- Yeah, but... [120-130]
  posted by Phil S. on Thu Oct 11 09:40 CST 2007 > V
  - Yeah, but... [120-130]
    posted by JohnMc on Fri Oct 12 02:04 CST 2007 > V
- Drag coefficient for a 122 [120-130]
  posted by B20Paul. subscriber on Thu Oct 11 18:10 CST 2007 > V
  - Drag coefficient for a 122 [120-130]
    posted by KLR142 on Thu Oct 11 20:11 CST 2007 > V
    - Drag coefficient for a 122 [120-130]
      posted by B20Paul. subscriber on Fri Oct 12 04:27 CST 2007 > V
      - Drag coefficient for a 122 [120-130]
        posted by JohnMc on Fri Oct 12 05:28 CST 2007 > V
        
        Drag coefficient for a 122 [120-130]
        posted by B20Paul. subscriber on Fri Oct 12 05:53 CST 2007 > V
        
        Drag coefficient for a 122 [120-130]
        posted by JohnMc on Fri Oct 12 07:38 CST 2007 > V
        
        Drag coefficient for a 122 [120-130]
        posted by B20Paul. subscriber on Sun Oct 14 03:02 CST 2007 > V
        
        Drag coefficient for a 122 [120-130]
        posted by JohnMc on Mon Oct 15 02:01 CST 2007 > V
  - Drag coefficient for a 122 [120-130]
    posted by JohnMc on Fri Oct 12 01:52 CST 2007 > V
    - Drag coefficient for a 122 [120-130]
      posted by B20Paul. subscriber on Fri Oct 12 04:17 CST 2007 > V
      - Drag coefficient for a 122 [120-130]
        posted by JohnMc on Fri Oct 12 05:21 CST 2007 > V
        
        Drag coefficient for a 122 [120-130]
        posted by B20Paul. subscriber on Fri Oct 12 06:02 CST 2007 > V
        
        Drag coefficient for a 122 [120-130]
        posted by JohnMc on Fri Oct 12 07:46 CST 2007 > V
  - Drag coefficient for a 122 [120-130]
    posted by Blue Horse on Fri Oct 12 14:15 CST 2007 > V
    - Drag coefficient for a 122 [120-130]
      posted by B20Paul. subscriber on Sun Oct 14 02:59 CST 2007 > V
      - Do the math [120-130]
        posted by Blue Horse on Mon Oct 15 00:27 CST 2007 > V
        
        Do the math [120-130]
        posted by lee subscriber on Mon Oct 15 03:27 CST 2007 > V
        
        Do the math [120-130]
        posted by B20Paul. subscriber on Fri Oct 19 04:59 CST 2007 > V
        
        Do the math [120-130]
        posted by KLR142 on Fri Oct 19 16:13 CST 2007 > V
        
        Do the math [120-130]
        posted by JohnMc on Mon Oct 22 07:36 CST 2007 > V
        
        Do the math [120-130]
        posted by KLR142 on Mon Oct 22 21:15 CST 2007 > V
        
        Do the math [120-130]
        posted by B20Paul. subscriber on Mon Oct 22 23:27 CST 2007 > V
        
        Do the math [120-130]
        posted by KLR142 on Tue Oct 23 19:08 CST 2007 > V
        
        Kyle, he's talking about the single weber downdraft manifold. You've seen one (Pic link inside) [120-130]
        posted by someone claiming to be hudson on Fri Oct 26 03:24 CST 2007 > V
        
        Kyle, he's talking about the single weber downdraft manifold. You've seen one (Pic link inside) [120-130]
        posted by B20Paul. subscriber on Fri Oct 26 18:50 CST 2007 > V
        
        Gotcha... [120-130]
        posted by KLR142 on Sat Oct 27 08:10 CST 2007 > V
        
        Gotcha... [120-130]
        posted by B20Paul. subscriber on Sat Oct 27 08:38 CST 2007 > V
        
        Gotcha... [120-130]
        posted by KLR142 on Sat Oct 27 13:23 CST 2007 > V
        
        Gotcha... [120-130]
        posted by JohnMc on Mon Oct 29 02:18 CST 2007 > V
        
        Staggered Ram [120-130]
        posted by B20Paul. subscriber on Mon Oct 29 19:30 CST 2007 > V
        
        Do the math [120-130]
        posted by B20Paul. subscriber on Mon Oct 22 23:35 CST 2007 > V
        
        Do the math [120-130]
        posted by JohnMc on Tue Oct 23 02:09 CST 2007 > V
        
        Do the math [120-130]
        posted by B20Paul. subscriber on Tue Oct 23 04:19 CST 2007 > V
        
        Do the math [120-130]
        posted by JohnMc on Thu Oct 25 01:55 CST 2007 > V
        
        Do the math [120-130]
        posted by Blue Horse on Thu Oct 25 10:38 CST 2007 > V
        
        Do the math [120-130]
        posted by B20Paul. subscriber on Fri Oct 26 19:46 CST 2007 > V
        
        Do the math [120-130]
        posted by JohnMc on Mon Oct 29 02:13 CST 2007 > V
        
        Do the math [120-130]
        posted by B20Paul. subscriber on Mon Oct 29 18:46 CST 2007 > V

Drag coefficient for a 122 [120-130]
posted by uncle_bagley subscriber on Fri Oct 12 05:08 CST 2007 > V
- measured Drag for a 222 [120-130]
  posted by lars young on Sun Oct 28 05:57 CST 2007 > V
  - measured Drag for a 222 [120-130]
    posted by uncle_bagley subscriber on Sun Oct 28 13:49 CST 2007 > V
    - measured Drag for a 222 [120-130]
      posted by JohnMc on Mon Oct 29 02:15 CST 2007 > V
      - measured Drag for a 222 [120-130]
        posted by KLR142 on Mon Oct 29 06:14 CST 2007 > V
        
        measured Drag for a 222 [120-130]
        posted by someone claiming to be lars young on Wed Oct 31 13:13 CST 2007 > V

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Drag coefficient for a 122 120-130