<VV> Engine Time

[Dennis & Debbie Pleau]

Tom,

I would really think about cutting the step out of these heads and then 
reducing the CR back to about 9.5:1 with which ever head gasket you decide 
on.  I personally use steel.  The squish Corvair heads was really wide 
because of build up from fuel with lead.  Now that their is not near as 
much build up the squish area so you don,t have to worry about the build up 
of the carbon on the piston hitting the head, reducing the squish area will 
allow you to run higher compression ratios and maybe with lower octane.  As 
for torqueing the heads, Use Richard's sequence and use the number 1/2 way 
between the minimum and maximum for that year/engine, that way if your 
torque wrench isn't perfect, you are still within the range.

On a related note, I'm going to start daily driving a 66 110 I've owned for 
a few years and put a lot of miles on with every drop being the highest 
octane I can buy.  I'm going to try mid grade on my next fill up, if it 
pings, it's back to premium, if not I'll continue to use the mid grade.

Dennis

At 03:17 PM 9/11/2005, Tom  Wright wrote:
>Hi All.
>
>The 66 Corsa is coming along and I am getting close to engine assembly 
>time. I have plastiguaged the rods, and miked the crank journals, all is 
>ready. The pistons are in the bores and I am just having the crank final 
>polished.
>
>So now the questions.
>
>I have brand new 140 heads. Copper head gaskets or steel? (cylinders are 
>+030).
>
>I have a torque sequence from Richard Finch as 5 11 1 7 3 9
>                                                                      12 6 
> 8 2 10 4
>
>and the 65 shop manual says 12 8 1 4 6 10
>                                             11 7 3 2 5 9
>
>Vote on the best one for me to use.
>
>Torque to 35, 30, or 25 - 28 with this over bore?
>
>Thanks for all the help!
>
>Tom Wright
>St.Catharines
>www.vaxxine.com/tomspage
>VA3TOM
>66 Corsa 140
>Corsa Ontario
>CORSA