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Re: max overbore on a 72 400 block
[Re: mopar dave]
#873212
12/07/10 01:26 AM
12/07/10 01:26 AM
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Joined: Aug 2003
Posts: 8,716
Baltimore/Denver
64Post
master
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master
Joined: Aug 2003
Posts: 8,716
Baltimore/Denver
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Quote:
the block has not been tanked yet. wanted to get it mag'ed and sonic checked first.
If there is scale build-up you'll get inaccurate readings...
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Re: max overbore on a 72 400 block
[Re: mopar dave]
#873213
12/07/10 01:29 AM
12/07/10 01:29 AM
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Joined: Nov 2003
Posts: 5,160
Texas
dannysbee
master
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master
Joined: Nov 2003
Posts: 5,160
Texas
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No way one bank of cylinders mirror the other. I would take those figures with a grain of salt.
Getting old just means you were smarter than some and luckier than others.
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Re: max overbore on a 72 400 block
[Re: mopar dave]
#873215
12/07/10 01:54 AM
12/07/10 01:54 AM
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Joined: Jan 2010
Posts: 588
Franklin, TN
23T Hemmee
mopar
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mopar
Joined: Jan 2010
Posts: 588
Franklin, TN
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Quote:
its either the same or he only measured the thrust side,but what would it matter. would'nt the thrust side be more important anyway?
Dave,
The thrust side may be more important, but if the non-thrust side is .080" it doesn't matter how thick the thrust side is, you can split a cylinder just as easily....... don't ask me how I know..... 
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Re: max overbore on a 72 400 block
[Re: mopar dave]
#873220
12/07/10 09:39 PM
12/07/10 09:39 PM
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Joined: Jan 2003
Posts: 6,591
Canton, Ohio
Sport440
master
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master
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
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While Mike/MR Pbody gets 74 readings per cyl. I think 12 per cyl is fine 4 top/ 4 mid /4 bottom, but more is even nicer. But 74 per cyl  Mike, Give us a pic of Those reads  mike
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Re: max overbore on a 72 400 block
[Re: 23T Hemmee]
#873222
12/08/10 02:38 AM
12/08/10 02:38 AM
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Joined: Aug 2003
Posts: 43,284
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,284
Bend,OR USA
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I check each cylinder in 12 places, one inch down(and away from any head bolt bosses), halfway down of the stroke and one to two inches up from the bottom of the cylinders. this is on all four corners, camside, front, back and outside of block (motor mount side). I have seen some shops use the average method, one reading per side sliding the probe from top to bottom of the cylinder and then give you the thinnest reading, but I don't like that method so I do it the long, hard way 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: max overbore on a 72 400 block
[Re: 23T Hemmee]
#873223
12/08/10 06:40 AM
12/08/10 06:40 AM
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Joined: Jul 2009
Posts: 413
Norway (old world)
Oyvind Mopar
mopar
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mopar
Joined: Jul 2009
Posts: 413
Norway (old world)
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Quote:
Has anyone ever noticed, that #1 cylinder on a B or RB always seems to be the thinnest, at least on the blocks I've had done through the years? I've only done half a dozen or so but just curious if anyone else has run into that.
Yes, Ronny, I have tested some, and it seems that #1 is thin on the thrust side, and number 8 is thin on the other side, it sees to be a pattern on the blocks that I have measured. The other cylinders seem to be more even. Could be a consequence of the way the cores are placed by some sort of machine? (I do not know the process).I better go with alublock and machined sleeves...(LOL) 
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Re: max overbore on a 72 400 block
[Re: MR_P_BODY]
#873225
12/08/10 11:04 AM
12/08/10 11:04 AM
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Joined: Nov 2003
Posts: 5,160
Texas
dannysbee
master
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master
Joined: Nov 2003
Posts: 5,160
Texas
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Dave please let us know how it turns out.
Getting old just means you were smarter than some and luckier than others.
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Re: max overbore on a 72 400 block
[Re: mopar dave]
#873227
12/08/10 03:29 PM
12/08/10 03:29 PM
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Joined: May 2008
Posts: 1,131
Thigh-Gap Junction
@#$%&*!
New user name, Same old jerk!
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New user name, Same old jerk!
Joined: May 2008
Posts: 1,131
Thigh-Gap Junction
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Quote:
i'm hoping to get some accurate numbers from MM next week.
Tell them you're going to publish the results on Moparts. That might prod them into giving you good service. They have a reputation to repair.
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Sorry, but those numbers are better than most after market mopar blocks.......bs I say.
