Classic Mustangs List Archive

This read-only message was archived from a public mail list.
Mail From: Cheryl Bunnell (email redacted)

> I have just recently purchased a set of 1970 Boss 302 heads. I
> understand that the chamber volume varies between 58 and 60 CCs. My
> question is, is there a way to tell without actually measuring the
> chamber volume what size chambers I have?
> Is it also true that if I install these heads on my Boss 302
> with 58CC chambers, my compression would be about 11.2 to 1? If so,
> is there a way to bring down the compression down to about 10.5 to 1?
>
> Steve Bunnell
> 65 Mustang Convertible
> 66 Mustang W/Boss 302
> 67 Cougar GT 390

---------------------------------------------------------------------
For information on Subscribing and Unsubscribing as well as a list
archive please visit:

antler.webworks.ca/cm

This read-only message was archived from a public mail list.
Mail From: MrFomoco (email redacted)

Cheryl Bunnell wrote:
>
> I have just recently purchased a set of 1970 Boss 302 heads. I
> understand that the chamber volume varies between 58 and 60 CCs. My
> question is, is there a way to tell without actually measuring the
> chamber volume what size chambers I have?

Maybe I'm missing something, but the point is that your
chambers should have a "nominal" volume of 58.6. That
means they will vary somewhat, from a minimum of 57.2cc
to a maximum of 60cc.

> Is it also true that if I install these heads on my Boss 302
> with 58CC chambers, my compression would be about 11.2 to 1? If so,
> is there a way to bring down the compression down to about 10.5 to 1?

Now I'm lost...what do you mean by that line about 58cc?
Are you replacing 1969 heads with 1970 heads? Then all
you need do is use 1970-type pistons - which you should
be, anyway. Resulting compression is around 10.5:1 with
the stock gaskets.
--

MrF
-------------------------------------------------------------------------
This month's special: NOS Autolite points, rotor, &
condenser for most 6-cylinder engines...........$15
voicenet.com/~fomoco
THE online source for 1960-1973 Ford & L-M info

---------------------------------------------------------------------
For information on Subscribing and Unsubscribing as well as a list
archive please visit:

antler.webworks.ca/cm