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Cooper S Block
Posted: Wed Apr 06, 2011 5:22 pm
by Henry
Hello, I have an opportunity to buy a Cooper S engine, was wondering if anyone can tell from the attached photo what the bore size is (from the piston numbers)... I don't have physical access to the engine, the seller measured somewhere around 2.780" to 2.800" and perhaps he does have the tools to measure more accurately , so it is not clear to me if it is standard bore or 20 over. Thanks
Re: Cooper S Block
Posted: Wed Apr 06, 2011 7:42 pm
by johnatandy
Looks like standard bore to me.
Re: Cooper S Block
Posted: Wed Apr 06, 2011 8:16 pm
by InimiaD
AKM2 has the piston part number as AEG 143.
Standard bore size is quoted as 2.780"
Re: Cooper S Block
Posted: Wed Apr 06, 2011 10:08 pm
by Toby
If the pistons would be over sized that would be stated on them. These are stamped AEG341, to my knowledge those were innocenti 1300 cooper pistons. You will have to check the casting of the block to make sure it really is a S block
Re: Cooper S Block
Posted: Thu Apr 07, 2011 11:19 am
by Vegard
masnarda wrote:If the pistons would be over sized that would be stated on them. These are stamped AEG341, to my knowledge those were innocenti 1300 cooper pistons. You will have to check the casting of the block to make sure it really is a S block
These pistons are also found in 1300GTs and Cooper Ss.