Re: 413 block sonic test
[Re: cudaman1969]
#3200736
12/29/23 05:15 PM
12/29/23 05:15 PM
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Joined: Aug 2003
Posts: 43,157
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,157
Bend,OR USA
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I have one(1972 also) I built for my 1963 Fury, I'm going to tell the local streeters it is and old 413 industrial truck motor that runs pretty good  4.150 stroke, 7.100 long BB chevy type I beam rods, 440 Spurce heads and RPM inatke with a 850 CFM Pro System double pumper, I had it bore to 4.250 after sonic testing it, I wanted some cylinder wall left for future use if needed  I think I could have had it bore to 4,320 safely but maybe not, that was a long time ago and I haven't went out to the shop to see if I still have that sonic sheet or not 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 413 block sonic test
[Re: AndyF]
#3200831
12/30/23 01:39 AM
12/30/23 01:39 AM
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Joined: Feb 2016
Posts: 201
PA
Scully
enthusiast
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enthusiast
Joined: Feb 2016
Posts: 201
PA
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413 blocks are not usually very thick although I have heard of some 413 blocks that were made from 426 cores. Not sure that is true or not. The typical 413 engine was just like any other Mopar engine cast in the day, that is, they usually suck. The Mopar casting plants had poor quality control so there is usually a fair amount of cores shift. One side of the cylinders will be great, the other side thin. Almost every Mopar block I've ever tested has core shift.
Mopar blocks aren't as bad as Ford blocks, but they aren't great. Best factory blocks are Chevy big blocks. I've never seen a standard bore Chevy big block that was too thin for performance use. Most Ford blocks are too thin for performance use while roughly 50% of all Mopar blocks are too thin. Many early industrial 413 blocks are over .300" thick before boring which is why they are typically used for NHRA stock 426s. Some mid 60s 383 blocks I have and my 58 350 are well into the high .200"s and low .300"s. I don't think the 70s 413s are quite as consistently thick. The standard 413s are quite thin with the exception of the 1964 2205897 block which was also used for the 426 street wedge as well as a few Max Wedges.
Last edited by Scully; 12/30/23 01:42 AM.
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Re: 413 block sonic test
[Re: AndyF]
#3200866
12/30/23 10:12 AM
12/30/23 10:12 AM
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Joined: May 2005
Posts: 1,977
Apollo, PA.
B1MAXX
top fuel
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top fuel
Joined: May 2005
Posts: 1,977
Apollo, PA.
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413 blocks are not usually very thick although I have heard of some 413 blocks that were made from 426 cores. Not sure that is true or not. The typical 413 engine was just like any other Mopar engine cast in the day, that is, they usually suck. The Mopar casting plants had poor quality control so there is usually a fair amount of cores shift. One side of the cylinders will be great, the other side thin. Almost every Mopar block I've ever tested has core shift.
Mopar blocks aren't as bad as Ford blocks, but they aren't great. Best factory blocks are Chevy big blocks. I've never seen a standard bore Chevy big block that was too thin for performance use. Most Ford blocks are too thin for performance use while roughly 50% of all Mopar blocks are too thin. What?  Not buying this either. 460/429's are very good blocks in my opinion. The only two engines I have seen with split bores was a BBC, and a BBM
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Re: 413 block sonic test
[Re: cudaman1969]
#3201043
12/31/23 12:48 AM
12/31/23 12:48 AM
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Joined: Feb 2016
Posts: 201
PA
Scully
enthusiast
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enthusiast
Joined: Feb 2016
Posts: 201
PA
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Not sure but I’m thinking industrial, right thick on most cylinders at top .250 to .300+. Even at .120 over (426 + .060) still a lot of wall left The last regular 413 blocks were made in 1965, Al used the industrial 413s at some point in his 426 Stockers unless he had some unbored 440s or 426 marine blocks.
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Re: 413 block sonic test
[Re: Scully]
#3201063
12/31/23 07:43 AM
12/31/23 07:43 AM
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Joined: Dec 2014
Posts: 5,807
ohio
ruderunner
master
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master
Joined: Dec 2014
Posts: 5,807
ohio
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I can see the 413 truck engines being thicker 66 and up. There's a good chance that they were cast using 440 molds.
Angry white pureblood male
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Re: 413 block sonic test
[Re: ruderunner]
#3201184
12/31/23 04:07 PM
12/31/23 04:07 PM
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Joined: Feb 2016
Posts: 201
PA
Scully
enthusiast
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enthusiast
Joined: Feb 2016
Posts: 201
PA
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I can see the 413 truck engines being thicker 66 and up. There's a good chance that they were cast using 440 molds. The thickest 413 I have came out of a 1963 Dodge tractor C 1000, it's in my race car now.
Last edited by Scully; 12/31/23 04:07 PM.
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Re: 413 block sonic test
[Re: cudaman1969]
#3201587
01/02/24 11:10 AM
01/02/24 11:10 AM
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Joined: Jan 2003
Posts: 13,362
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,362
Marion, South Carolina [><]
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The '73 industrial 413 block I have isn't crazy thick. I can't recall the thickness from memory, but I wouldn't go past .060" or .070" over. I checked it after hearing about how they were really thick and would easily go to 4.320". Not true w/ the one I have.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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