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Main bore size of a 383/400
#1614463
05/01/14 01:27 AM
05/01/14 01:27 AM
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Joined: Jan 2012
Posts: 2,651
Stuttgart, Arkansas
rickseeman
OP
master
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OP
master
Joined: Jan 2012
Posts: 2,651
Stuttgart, Arkansas
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I can't believe with all my Mopar books I can't find the main bore min-max size for a 400. Thanks for your help.
2011 Drag Pak Challenger
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Re: Main bore size of a 383/400
[Re: rickseeman]
#1614464
05/01/14 01:52 AM
05/01/14 01:52 AM
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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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Quote:
I can't believe with all my Mopar books I can't find the main bore min-max size for a 400. Thanks for your help.
Well the stock-min size for the 400 is 4.342. As for max, less is better. Keep the bores as thick as possible. Dont try to gain CI with the bores.
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Re: Main bore size of a 383/400
[Re: Sport440]
#1614466
05/01/14 02:23 AM
05/01/14 02:23 AM
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Joined: Dec 2006
Posts: 3,667
Arizona
Chris'sBarracuda
master
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master
Joined: Dec 2006
Posts: 3,667
Arizona
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Quote:
Quote:
I can't believe with all my Mopar books I can't find the main bore min-max size for a 400. Thanks for your help.
Well the stock-min size for the 400 is 4.342. As for max, less is better. Keep the bores as thick as possible. Dont try to gain CI with the bores.
Don't think that's what he's asking..
 Crankshaft..
Chris. 
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Re: Main bore size of a 383/400
[Re: Chris'sBarracuda]
#1614467
05/01/14 03:23 AM
05/01/14 03:23 AM
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Joined: Jan 2007
Posts: 1,668
Mi,U.S.A.
mike s
top fuel
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top fuel
Joined: Jan 2007
Posts: 1,668
Mi,U.S.A.
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Should be in the service manual and any of the bearing catalogs
Leave the gun.......take the Cannoli's....Mike
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Re: Main bore size of a 383/400
[Re: mike s]
#1614468
05/01/14 11:31 AM
05/01/14 11:31 AM
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Joined: Jan 2012
Posts: 2,651
Stuttgart, Arkansas
rickseeman
OP
master
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OP
master
Joined: Jan 2012
Posts: 2,651
Stuttgart, Arkansas
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Yes, what I need is the main bore spec. An RB is 2.9425-2.943 but I don't have the Chrysler specs for a B engine. Thanks.
2011 Drag Pak Challenger
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Re: Main bore size of a 383/400
[Re: MR_P_BODY]
#1614472
05/01/14 12:55 PM
05/01/14 12:55 PM
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Joined: Jan 2012
Posts: 2,651
Stuttgart, Arkansas
rickseeman
OP
master
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OP
master
Joined: Jan 2012
Posts: 2,651
Stuttgart, Arkansas
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There should be a high and low spec. When line honing 5 main bores at once it would be a little difficult to hit them all at the same time within a tenth.
2011 Drag Pak Challenger
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Re: Main bore size of a 383/400
[Re: rickseeman]
#1614473
05/01/14 12:58 PM
05/01/14 12:58 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
There should be a high and low spec. When line honing 5 main bores at once it would be a little difficult to hit them all at the same time within a tenth.
Thats why I said check other data... this didnt have
a max/min.. all the other data on that engine did
show max/min
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Re: Main bore size of a 383/400
[Re: MR_P_BODY]
#1614474
05/01/14 06:27 PM
05/01/14 06:27 PM
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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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I use an old Vandervell bearings catalog (#112) which has most measures in inches and metric. For the B Mopar engine it reads: Main bearing housing 2.8175"-2.8180" Crankpin mains 2.6245" - 2.6255" I have used these measures both for checking/lineboring and crankgrinding and it works out fine; I normally grind the crank at 2.6250 as a base for the undersizes. Hope this helps you out! 
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