Re: [Chrysler300] Known 413 block/ head problems

[Richard Osborne <reomotorsports1@xxxxxx>]

Hi Rich,

Although I have never personally done a '64 big block motor, I have done several other years, both before and after. The 300 (letter) cranks were specially balanced and can be identified when out of the block or with the pan removed. The ram cars had special timing chain gears which retarded the cam 3 degrees. Of course the cam was different than a standard engines. I also believe the springs may have utilized dual springs instead of the single, but I would need to dig some stuff out to confirm. Basically all of these things will swap into each other, nothing unique about castings (except upper cam timing chain gear).

All Mopar big blocks allow for oil travel through the pushrod. Aside from the length in pushrods (between B and RB engines) the only other difference was a step down on  one end of the pushrod. I assume they got away from this as simply a cost cutting measure. Has no affect on performance. 

Remember, however, that the short ram cars and the H's used solid lifters, not hydraulic as all others did.

The Purple shaft that you have heard about goes way back. When Mopar Performance first started, they sold speed parts through your local dealer under the name Hustle Stuff. This then became Direct Connection. They offered hotter cams that were called "Purple Shafts" and could be identified by the purple paint in between lobes. People who have been around for a while tend to still refer to them by this name, even though there ended up being a multitude of different grinds. I have used them in most rebuilds. Somewhere in the late 80"s or early 90's, the name was changed to Mopar Performance. Most of the same cams are still available. Go to Mancini Racing or your local dealer to purchase.

For my G, I used the equivalent to a 440 - 6pak cam. It was similar in specs. It idles smooth as could be and brakes work fine. I did have to re-drill the cam sprocket for the 3 degree retard and then centerlined the cam from there. It is really very mild and probably could use a little more lope at idle.

Hope this helps.

Richard



On Jun 5, 2013, at 2:55 AM, Rich Barber <c300@xxxxxxx> wrote:

> While we?re on the 413 subject, can someone list the differences in valve trains between NY, 300, 300K and 300K ram engines, say in 1964?  I?m aware of the different cams, bigger intake valves, solid tappets and adjustable rocker arms but wondering about valve springs and pushrods.  Wondering also about any other significant differences in the 360 HP K heads and the 390 HP ram heads.  If the later pushrods had oil forced through them, would it make sense to use these in a rebuild?
>  
> I?m still looking for a specific recommendation for a replacement camshaft for a ?64K ram engine.  The cam shops seem to offer one size fits all cams for 361 to 426 MW engines and it just seems that the ram engines would require a camshaft especially ground to work with the rams.  None of their performance cams seem to come anywhere near to matching the J/K ram cam specs.  I have access to an NOS hydraulic cam for a 360HP 300K engine.  I keep hearing about purple cams.  What?s that all about?  If someone has replaced the cam in their J or K ram engine with something that works well in the normal driving environment, makes good vacuum, can be made to start and idle and still create whiplash when stomped, I?d love to hear about it.
>  
> C-300-K?ly,
> Rich Barber
>  
> From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of Bill Huff
> Sent: Tuesday, June 04, 2013 4:32 PM
> To: Richard Osborne; rinandal
> Cc: Chrysler300@xxxxxxxxxxxxxxx
> Subject: Re: [Chrysler300] Known 413 block/ head problems
>  
>  
> Pushrod design changed in 1968 from 1967. Lost the stepped end.
> 
> Bill Huff
> 
> At 6/4/201304:51 PM, Richard Osborne wrote:
> >
> >
> >Should have said Valve train interchangeable 
> >EXCEPT pushrods. RB engines are longer than B, 
> >the rest of the upper engine parts are interchangeable.
> >
> >Richard
> >
> >On Jun 4, 2013, at 4:41 PM, Richard Osborne 
> ><<mailto:reomotorsports1%40me.com>reomotorsports1@xxxxxx> wrote:
> >
> > > The only weakness with the 413 is the fact 
> > that most of the heads use 4 bolt valve covers. 
> > Not only are they more prone to leakage, but 
> > they also are harder to find pretty shiny 
> > aftermarket replacements. Other than that parts 
> > are the same for the 383, 400, 426W and 440. 
> > Parts (VALVE TRAIN) are interchangeable.
> > >
> > > Richard
> > >
> > > On Jun 4, 2013, at 2:00 PM, rinandal 
> > <<mailto:rinandvan%40att.net>rinandvan@xxxxxxx> wrote:
> > >
> > >> Hi,
> > >> Anyone out there aware of any inherent 
> > weakness and or problems with 1964 413 c.i. block/heads?
> > >>
> > >> Thanks,
> > >> Van
> > >>
> > >>
> > >
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> > >
> > >
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