I have my engine apart and I am trying to decide what to do and how far I
want to go...Stock or High compression pistons seems to be one of the big
questions?....I am shooting for a tractable, well behaved, hot road car.
Emphasis on low end and torque over top speed.
This article seems to indicate that 'stock' may have been higher compression
than I have now. My pistons are in pretty nice condition, but they have a
deep dish so must be 'low compression'? or am I getting this all wrong
I copied this of the Seveb Enterprises website
http://www.7ent.com/
"High-Compression" Higher compression equals more power, so it is a common
practice to use
a higher compression ratio when rebuilding. We often get phone calls from
customers who are not
aware their engine has been "detuned" as a result of an earlier rebuild
where low-compression Sprite-
Midget-Austin America pistons were used instead of the Cooper S type. The
stock 'S' ran about
9.75:1 compression, which was fairly high compression in the old days, but
is now seen much more
often in the high-efficiency engines of modern cars. The Cooper S piston
evolved several times over
the years, going from a 4-ring type to a 3-ring type, and now is offered in
a modern low friction 3-ring
setup with slipper skirt. The current design, developed for
high-performance Metro A+ engines gets
extra compression from a taller pin height, which is the distance from
piston pin centerline to the top.
The top has a shallow dish, unlike the deep dish of the Spridget-America
pistons. This is our most
popular 1275cc piston, and we have good stocks at great prices. We've heard
of other suppliers
getting $325+ per set, but we'd be embarrassed to charge that much. All
sizes on the shelf for $279.80!
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