doobie360 Posted August 18, 2014 Report Share Posted August 18, 2014 IT WOULDNT LET ME POST THIS IN THE FAQS AND HOW TO SECTION SO IM POSTING HERE LOOKING FOR HELP I have some 92mm je forged pistons i am trying to sell and have a potential buyer set up... they buyer wants to know specs on compression ratio, but i know nothing about them other than brand and bore size( got them with a parts car and dont have nothing to use them in), only two markings on them are 92m and je, is there any way to determine the compression ratio on them without having them installed in a engine? they potential buyer says je charges 75 dollars to identify pistons and i am hoping to get them figured out to make this sell, any help is greatly appreciated!!!! Quote Link to comment Share on other sites More sharing options...
speedyquest Posted August 18, 2014 Report Share Posted August 18, 2014 First off the FAQ / How-To section is not the place to ask questions and you would have known that if you would have payed attention. Secondly arn't those the pistons that have pitting etc in them? I don't know about anyone else but I wouldn't personally help you sell those. They should not be used in another engine. Quote Link to comment Share on other sites More sharing options...
StarquestRescue Posted August 18, 2014 Report Share Posted August 18, 2014 Probably 8-1 from top end performance. Quote Link to comment Share on other sites More sharing options...
Dad Posted August 18, 2014 Report Share Posted August 18, 2014 92mm is .035 oversize. Wiseco makes an off the shelf 92mm pistons with 15cc dish that is stock compression, (7-1) stock pistons are 7-1 if the dish is less than 15cc then compression will be higher. My 8-1 pistons are 6cc dish 8-1 Dad Quote Link to comment Share on other sites More sharing options...
doobie360 Posted August 19, 2014 Author Report Share Posted August 19, 2014 thanks alot!! held about 15cc before it started to "bubble over" Quote Link to comment Share on other sites More sharing options...
Guest 87redstar Posted August 29, 2014 Report Share Posted August 29, 2014 Thought you had to use plexiglass over it to get an accurate reading Quote Link to comment Share on other sites More sharing options...
ucw458 Posted August 29, 2014 Report Share Posted August 29, 2014 Thought you had to use plexiglass over it to get an accurate reading Bingo Took awhile but someone finally mentioned it. Quote Link to comment Share on other sites More sharing options...
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