My block is a truck/industrial block but I sonic tested it before I took to machine shop cause I could not make my mind up to try and save some bucks on pistons.....in the end I decided to spend the bucks for custom pistons cause it is the original block for my Max Wedge car.
I posted my thoughts on Sonic Testing in another thread here somewhere.....I think it was about a cracked cylinder someone has.
On Sun, Sep 4, 2011 at 11:02 AM, Donald Gallimore
<dongallimore@xxxxxxx> wrote:
To make a 413 (4.1875" bore) into a 426 (4.25") you need to do just a little more than 60 thousand - 0.0625". Until now, I'd always thought a 413 was a 4.18" bore - glad the question on the overbore was asked. I do have an engine that is a 413 made into a 426.
Good thing about the 426 bore is that pistons are more readily available (barely).
A recommendation I've seen relative to the overbore is to sonic test the wall thickness first to determine if it can take that much overbore - any comments on that?
Akron Don Gallimore
From: a440plus6 <a440plus6@xxxxxxxxx>
To: 1962to1965mopars@xxxxxxxxxxxxxxxx
Sent: Sun, September 4, 2011 10:23:29 AM
Subject: Re: Early 70's 413
Can just do 60 overbore If memory serves correct and that will be stock 426 bore.....memory is fading but I think thats what it is.
When I had mine machined it cleaned up at 10 over so I just special ordered some Childs and Alberts.
On Sun, Sep 4, 2011 at 4:01 AM, MO
<micher@xxxxxxxxxxxxxxx> wrote:
I agree with what the other guys have stated--one more thing, My 413
notor home engine has dished pistons to give it lower compression.
New higher compreesion piston are available from sealed power, but
the are cast pistons--expensive as having custom pistons made. The
plus side: forged steel crank and stronger block with outside the
block strengthening ribs........................MO
On Sep 3, 8:33 pm, Richard Kinsley <leroar.kinsley...@xxxxxxxxx>
wrote:
> My reply is NO! I'm involved with a guy who has a '66 Satellite that was a
> 383. They scrapped the 383 'cause the intake was missing and bought a 413
> motorhome engine. There are myriads
of issues. He abandoned that engine
> swap.
>
> He then bought a 318LA and trans and it's a mess too. Dodger and I are going
> to try to get it running on Mon and Tues.. I don't hold much hope for it
> personally. It must be a truck engine as the oil pan is wrong so they
> dropped the tie-rod to make room. I guess it's a freewheeling type steering
> or should I say non-steering. It matches the 1 disc and 1 drum front brakes
> though. An incredible mismatch of parts.
>
> Don't be afraid of the poly as it will be the easiest way out for you and
> more economical in the long run. Poly's are not cheap but compared to all
> the problems you will encounter they really aren't that expensive either. So
> my very heart felt response is don't mess with a motorhome engine!!!
>
> Rich Kinsley '64 Dodge Polara 4dr 318poly w/goodies
>
=====================================================================================================================================
>
>
>
>
>
> On Sat, Sep 3, 2011 at 1:28 PM, Ray Henry <62d...@xxxxxxxxxxxx> wrote:
> > Just been given a possible lead on an early 70's 413. It's in a motorhome
> > that's being scrapped, supposed to be low miles, and in good shape. Should I
> > be considering this, or just sticking with my plans to do another 318 poly?
> > ****
>
> > ** **
>
> > - Ray****
>
> > ** **
>
> > --
> > --
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> >http://www.1962to1965mopar.ornocar.com/general_disclaimer.html.
> > --
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> --
> Rich Kinsley '64 Dodge Polara 4dr 318poly w/goodies- Hide quoted text -
>
> - Show quoted text -
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Please address private mail -- mail of interest to only one person -- directly to that person. That is, send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks!
1962 to 1965 Mopar Clubhouse Discussion Guidelines:
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--
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Please address private mail -- mail of interest to only one person -- directly to that person. That is, send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks!
1962 to 1965 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html and
http://www.1962to1965mopar.ornocar.com/general_disclaimer.html.
-- If memory serves,the bore for the 426 and 383 are the same. Only the stroke is different.
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