Posted By: rickseeman
Main bore size of a 383/400 - 05/01/14 05:27 AM
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.
Main bore size of a 383/400
Posted By: Sport440
Re: Main bore size of a 383/400 - 05/01/14 05:52 AM
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.
Posted By: StealthWedge67
Re: Main bore size of a 383/400 - 05/01/14 06:13 AM
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.
You're not going to find anyone publishing a "max overbore". It depends on the particular block you're working with. Have it sonic checked.
Posted By: Chris'sBarracuda
Re: Main bore size of a 383/400 - 05/01/14 06:23 AM
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.
Posted By: mike s
Re: Main bore size of a 383/400 - 05/01/14 07:23 AM
Should be in the service manual and any of the bearing catalogs
Posted By: rickseeman
Re: Main bore size of a 383/400 - 05/01/14 03:31 PM
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.
Posted By: moparlifer
Re: Main bore size of a 383/400 - 05/01/14 04:18 PM
Look in a clevite bearing book, it lists all housing bore sizes.
Posted By: rickseeman
Re: Main bore size of a 383/400 - 05/01/14 04:22 PM
I have that book but I would rather hear it from Chrysler.
Posted By: MR_P_BODY
Re: Main bore size of a 383/400 - 05/01/14 04:29 PM
What I show is 2.625 but check some other data also..
I'm not sure on this the way its written
I'm not sure on this the way its written
Posted By: rickseeman
Re: Main bore size of a 383/400 - 05/01/14 04:55 PM
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.
Posted By: MR_P_BODY
Re: Main bore size of a 383/400 - 05/01/14 04:58 PM
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
Posted By: Oyvind Mopar
Re: Main bore size of a 383/400 - 05/01/14 10:27 PM
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!
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!