Re: V8 pistons

Posted by Owen_Dyneto On 2014/1/4 14:09:38

Were there low compression export straight 8 engines? Is there data for the difference between the 2?

The export in-line eights of the postwar era that were offered with lower compression, this was typically accomplished with an extra-thick head gasket. These are listed in the parts listings and called "Extra thick and Export" gaskets. Check the 48-54 master parts list (5.0504) and you'll see them listed.

They also appear in parts listings for other years. For example in the 35-41 parts list they show both extra thick (0.091" vs 0.060") as well as Export gaskets - different part numbers for both. In yet earlier years (for example 1933-36 Seniors) the engine themselves were offered in several compression ratios and perhaps the lower CRs were used for export cars to countries with marginal gasoline quality. Again just using 33-34 as an example, the engines were offered in 6.0, 6.25, 6.5, and 7.0.