Hello Members After much time and searching I finally can CONCLUDE the 'domed piston' questions involving the 'higher compression' pistons supposedly in the 290Hp engines. I HAVE A TRUE ORIG FP31 MOPAR PISTON,,,along side a regular 318 9/1 compression piston of about 1960 vintage. ALL POLY 318s were 9/1 compression except for of course the 290HP engine (supposedly) I am able to use a common wrist pin to locate both pistons at the same point that they would be on the same connecting rod. GUESS WHAT--The FURY piston is higher by .010 to .015 (depending on how and where you measure it.) SURE DOESNT SOUND LIKE MUCH DOES IT?? ANYWAY---A little math based on 9/1 compression for the stock piston and using a .012 average higher FURY piston YIELDS------------------- 9.23/1 for the FURY PISTON!!! So the FURY piston WAS A SPECIAL PISTON,,,yielding approx 9.25/1 ED ECKERSON LI NY ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/goldenfin/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/goldenfin/join (Yahoo! ID required) <*> To change settings via email: goldenfin-digest@xxxxxxxxxxxxxxx goldenfin-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: goldenfin-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/ |