There is probably a difference in the head. Studebaker used thicker
head gaskets to lower the compression. Also flat top pistons will
lower the ratio, domed pistons will raise it.
Kurt Weisner
----- Original Message -----
From: "Adam Bradley" <ambradley@yahoo.com>
To: <datsun-roadsters@autox.team.net>
Sent: Thursday, February 14, 2002 12:32 AM
Subject: Basic question about compression ratio
> I know this is a very basic question but I don't understand how
> compression ratio is determined. For example, our R16 engines are 9:1,
> but there was a truck called the "Homer" that also uses the R16 engine
> but is only 8:1 (and has lower hp/torque, also single carb).
>
> I assume this means that on the compression stroke, the air is
> compressed to 1/9th (Roadster) or 1/8th (Homer) its original volume.
> Since both vehicles have the same bore and stroke, what makes the
> compression ratio lower on the truck?
>
> =====
> Adam
> '70 1600 SPL311-28181
> http://www.picturetrail.com/abend
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>
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