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B20 block identification 140-160

posted by jparker3 on Wed Jun 22 12:57 CST 2005
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last visit: Tue Jun 9 18:47 CST 2009

[RELATED]

The reason for asking the question in the first place was to determine which blocks might be those supposed thick walled late blocks that will accommodate larger bores. Everyone keeps saying that the 74/75 8 bolt blocks have thicker walls.
Well we just tested 5 blocks, 2 of which were 8 bolt blocks based on the cranks that were in them. All five had a thin spot toward the top of one cylinder that was between .150 and .165 thick with a stock bore. For a 92mm bore this spot would be under .100 on most, and there would be numerous spots and whole sides of cylinders under .120 on all. Enough of a problem that we would do an offset bore to get at least an .120 wall for a NA engine and would keep the overbore to .050 on a supercharged engine even with the offset bore.

Am I just getting a thin walled blocks?

John
V-performance.com

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B20 block identification [140-160]
posted by jparker3 on Tue Jun 21 06:25 CST 2005 >

B20 block identification [140-160]
posted by Phil S. on Tue Jun 21 07:45 CST 2005 > V
- B20 block identification [140-160]
  posted by someone claiming to be Tremmelle on Sun Jun 26 01:23 CST 2005 > V

B20 block identification [140-160]
posted by Jrobby on Tue Jun 21 08:15 CST 2005 > V
- B20 block identification [140-160]
  posted by jparker3 on Tue Jun 21 09:18 CST 2005 > V
  - B20 block identification [140-160]
    posted by Jrobby on Tue Jun 21 10:27 CST 2005 > V

B20 block identification [140-160]
posted by JohnMc on Tue Jun 21 09:55 CST 2005 > V
- B20 block identification [140-160]
  posted by Phil S. on Tue Jun 21 10:38 CST 2005 > V
  - B20 block identification [140-160]
    posted by JohnMc on Wed Jun 22 01:32 CST 2005 > V
    - B20 block identification [140-160]
      posted by JohnMc on Thu Jun 23 11:42 CST 2005 > V
      - B20 block identification [140-160]
        posted by jparker3 on Sat Jun 25 03:25 CST 2005 > V
        
        B20 block identification [140-160]
        posted by JohnMc on Sat Jun 25 07:37 CST 2005 > V
      - B20 block identification [140-160]
        posted by Bennie on Sat Jun 25 06:25 CST 2005 > V

B20 block identification [140-160]
posted by fidel on Tue Jun 21 11:22 CST 2005 > V

B20 block identification [140-160]
posted by walrus3 subscriber on Tue Jun 21 12:49 CST 2005 > V

B20 block identification [140-160]
posted by jparker3 on Wed Jun 22 12:57 CST 2005 > V
- B20 block identification [140-160]
  posted by Phil S. on Wed Jun 22 13:07 CST 2005 > V

B20 block identification [140-160]
posted by Bennie on Thu Jun 23 07:06 CST 2005 > V
- B20 block identification [140-160]
  posted by Phil S. on Thu Jun 23 08:32 CST 2005 > V
  - B20 block identification [140-160]
    posted by Bennie on Thu Jun 23 09:27 CST 2005 > V
    - B20 block identification [140-160]
      posted by Phil S. on Thu Jun 23 09:31 CST 2005 > V
      - B20 block identification [140-160]
        posted by jparker3 on Thu Jun 23 11:18 CST 2005 > V
        
        B20 block identification [140-160]
        posted by Phil S. on Thu Jun 23 12:06 CST 2005 > V
        
        B20 block identification [140-160]
        posted by someone claiming to be shayne on Thu Jun 23 12:51 CST 2005 > V
        
        B20 block identification [140-160]
        posted by jparker3 on Fri Jun 24 04:54 CST 2005 > V
        
        B20 block identification [140-160]
        posted by someone claiming to be shayne on Fri Jun 24 10:20 CST 2005 > V
        
        B20 block identification [140-160]
        posted by jparker3 on Sat Jun 25 03:39 CST 2005 > V
        
        B20 block identification [140-160]
        posted by CyaLater on Sat Jun 25 18:56 CST 2005 > V
        
        B20 block identification [140-160]
        posted by jparker3 on Sun Jun 26 13:59 CST 2005 > V
        
        B20 block identification [140-160]
        posted by CyaLater on Sun Jun 26 16:31 CST 2005 > V
      - B20 block identification [140-160]
        posted by someone claiming to be Ben Flierman on Thu Jun 23 20:11 CST 2005 > V
        
        Mystery Bridge. [140-160]
        posted by CyaLater on Thu Jun 23 23:28 CST 2005 > V

B20 block identification [140-160]
posted by Gary L subscriber on Fri Jun 24 04:48 CST 2005 > V
- B20 block identification [140-160]
  posted by Jrobby on Fri Jun 24 07:10 CST 2005 > V
  - B20 block identification [140-160]
    posted by jparker3 on Sat Jun 25 03:58 CST 2005 > V
- I have 2 blocks one with bridges and one without as well. [140-160]
  posted by someone claiming to be hudson on Fri Jun 24 11:19 CST 2005 > V

B20 block identification [140-160]
posted by someone claiming to be Tremmelle on Sat Jun 25 02:50 CST 2005 > V

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B20 block identification 140-160