Odonell, Blue Thunder, or Cool Power?

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[SIZE=21pt]Anyone?[/SIZE]

 

[Don Ferrette]

I can see it dropping compression on an older engine because the piston/liner fit being looser & having more blow by. More oil will seal it a bit better and I have seen this occur in some older motors.

 

[TimD]

Taper angle of liner would be another aspect of the oil / compression ratio story....