Re: [AMC-list] build Dates/401 CR

[Jim Shadwick <idahoamx@xxxxxxxxx>]

Armand....that is correct....the 58cc heads came out in late 71 and they 
went with the lower comp pistons in 72.....
JimS


Armand Eshleman wrote:
> Davis,
>
> Thanks for the quick response. I wish my memory was as good as yours.
> OK then, the 219s are 50.6cc and the 72 big valve heads went to a 58cc
> chamber,
> so I'm guessing now that the early 71 50.6cc heads made a 10.2 compression
> ratio,
> then the jump to the bigger 58cc chambers must have dropped it to 9.5???
> and the 58cc heads with the new piston design dropped the c/r to 8.5.
> Does that sound correct?
> Armand
>
> ----- Original Message ----- 
> From: "Davis Martin" <martin-davis@xxxxxxxxxxxxx>
> To: "AMC, Rambler, Nash, Jeep and family" <amc-list@xxxxxxxxxxxx>
> Sent: Sunday, May 17, 2009 5:29 PM
> Subject: Re: [AMC-list] build Dates/401 CR
>
>
>
>   




> I know you asked jim but I wanted to mention the 219 heads made in 70 and 71
> were 50.6 CC combustion chambers. in 72 they went to a 58 cc and then later
> changed the piston design.
> Davis
> --- On Sun, 5/17/09, Armand Eshleman <aje1@xxxxxxxxxxxxxxx> wrote:
>
> From: Armand Eshleman <aje1@xxxxxxxxxxxxxxx>
> Subject: Re: [AMC-list] build Dates/401 CR
> To: "AMC, Rambler, Nash, Jeep and family" <amc-list@xxxxxxxxxxxx>
> Date: Sunday, May 17, 2009, 5:18 PM
>
> Jim,
>
> Do you know what the differences are between the 10.2, the 9.5 and the 8.5
> are?
>
> I know the early 71 401 had the 219 heads with 58cc combustion chambers,
> Did AMC drop the compression to 9.5 by using a bigger combustion chamber
> head
> in late 71 and then go to different pistons to get the 8.5??
> Thanks,
> Armand
>
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