Hi Neil,
I got this from Richard Good. Maybe it will help.
Don
Neil Wehmeyer wrote:
>
> Thank you. I have just this afternoon installed the partly striped engine
> back into the chassis, I will now be able to pull the head and make the
> measurements. I can visualize how to compute the CI displacement of the
> cylinder bore, but how is the displacement contained in the head arrived at.
> Plugging the spark plug hole and pouring measured amounts of fluid into the
> area comes to mind, but I'll bet there is a more elegant way
>
> -----Original Message-----
> From: Ted Schumacher [mailto:tedtsimx@q1.net]
> Sent: Saturday, February 01, 2003 12:45 PM
> To: Neil Wehmeyer
> Cc: 6pack@autox.team.net
> Subject: Re: Machining head for compression ratio
>
> neil, you cannot come up with an arbitrary amount to mill. you have no
> idea what has been doe to the head prior to your custody. yo cc the
> block adn teh head, work out the formula for compression ratio ans see
> waht you have in the present form. then reduce the head cc to achieve
> the desired compression. it's safe, accurate adn the only way youcan
> knwo for sure what you have. please let meknow if we can help. ted
>
> Neil Wehmeyer wrote:
>
> >List:
> >Can anyone help me understand compression ratios and head thickness? I
> have
> >a '69 with engine #cc26944HE. The compression ratio of pre 1972 models is
> >stated to be 8.5 to 1. According to the TR Repair and Operation Manual the
> H
> >in this serial number is for high compression. I have a core engine
> >#cc53580E. The head from this core engine measures the same thickness as
> my
> >'69's head.
> >
> >Question numbers one and two:
> >Are these two engines of the same compression ratio, or were compression
> >ratios changed by differences in the pistons?
> >If they are the same compression ratio, what does the H in the serial
> number
> >of my '69's engine stand for?
> >
> >Question number three:
> >How do I determine how much to skim from these heads to increase the
> >compression ratio by a set amount. I would like to bring it up to 9.5 to
> 1.
> >
> >Thanks for any insight provided.
> >
> >Neil Wehmeyer
> >ngwehmeyer@attbi.com
> >CC26859L
> >
> >
>
> --
> Ted Schumacher
> tedtsimx@q1.net
> http://www.tsimportedautomotive.com
> 108 S. Jefferson St.
> Pandora, Ohio, USA
> Fax: 419.384.3272 (24 Hrs.)
> Phone: 800.543.6648 (US & Canada)
> Tech/ Gen. Information/ Worldwide: 419.384.3022
[demime 0.99d.1 removed an attachment of type application/msword which had a
name of TR6 COMPRESSION RATIO.doc]
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