hi peeps hope you can solve a prob for me.

i have a set of pistons with a crown size of 91.275

what size is this is not standard but thinking 0.25 oversize am i right or are they 0.5.

if they 0.5 someone is gonna get a tongue lashing lol

 

they sound like 0.5 to me !

what cars it off firstly so can check what the standard bore size is?

 

they are from a cossie but deffo not standard i have had a block thats meant to be 0.5 oversize and the piston slapped around like a dick in a bucket

 

come on peeps need your help

 

bttt

 

If you have a Burton Cataloge check out the bit about pistons and measurements this sould be a great help to you.

Pistons are measured at bottom of skirt at 90 degrees of gudgeon pin.
Bores can b 0.02 to 0.1 mm bigger depending on what pistons they are.

 

bttt