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84mm pistons......?!??!!

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Old 04-22-2005, 07:35 PM
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Default 84mm pistons......?!??!!

Ok heres the deal....I feel like a *** for asking this but....I bought some 84mm JE 9:0.1 pistons from a guy on here. I got the pistons today in the mail and I was looking @ them and on the inside they are stamped 81mm?!!??! So obviously these are 81mm right?? I have never bought pistons before unless they were machined from a block and are really 84 and just stamed 81, is that possible or are these 81mm??? Thanks

jon
Old 04-22-2005, 07:41 PM
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Default Re: 84mm pistons......?!??!! (JMcDB18C)

Measure them. Even a dial caliper will tell you if it's roundabout 81mm or 84mm.

If you don't have a dial caliper or micrometer, then you can use a ruler to measure and draw out 81mm and 84mm onto a piece of paper and set the piston in between the lines to determine whether you have one or the other.
Old 04-22-2005, 07:45 PM
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i have some @ my work, i never thought about that....thanks i will check it out.
Old 04-22-2005, 10:44 PM
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best way to use is a micrometer. man that sux if you got screwed and they sent you 81mm instead of 84mm. i''d go flip mode
Old 04-23-2005, 01:33 PM
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Default Re: (iROCKtheSOHC)

I sold him the pistons...they came out off my 84mm sleeved benson block...Mic it out man and you will see...That 81mm is probably the height of the piston....
Old 04-23-2005, 03:08 PM
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Default Re: (COLORPROS)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by COLORPROS &raquo;</TD></TR><TR><TD CLASS="quote">I sold him the pistons...they came out off my 84mm sleeved benson block...Mic it out man and you will see...That 81mm is probably the height of the piston....</TD></TR></TABLE>

Or just some random casting numbers, it doesn't have to be related to the piston dimensions at all
Old 04-23-2005, 08:59 PM
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Default Re: (b16sedan)

yeah, those are just a casting number...I have never seen a piston with it's size stamped on it.
Old 04-23-2005, 09:11 PM
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neither my CPs nor my Endyns had the size on there..
Old 04-23-2005, 11:27 PM
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Cool...Just trying to help the guy out...Didnt want him to ythink he got ripped off....

thanks guys
Old 04-24-2005, 04:44 AM
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Sorry about freaking out, lol. I just nevre bought pistons before and I was like great......lol. I brought them to my shop and got some dial calipers out and they were 84mm, i apologize colorpros, thanks again for giving me such a good deal. THIS IS GOOD GUY!!! BUY FROM HIM!! QUICK SHIPPING TOO!!
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