JE Pitons 94m
JE Pitons 94m
i know stock bore is 95.5mm, i ordered a set of stock bore 95.5m JE pistons, on the receipt/order they say 95.5mm, but on the pistons itself it says 94mm... am i missing something here.. or they just gave me the wrong ones?... also these were special ordered 9:1 compression.. on the JE website you only see 8.5:1 and 10.8:1 pistons avail for the vq35de
Last edited by boostintt; Mar 14, 2009 at 02:03 PM.
my buddy has a caliper, but he says we might need a micrometer to be 100% sure???
my first thought was to just measure it, but he says im not gonna get close.. but as soon as i get home i will do that!
my first thought was to just measure it, but he says im not gonna get close.. but as soon as i get home i will do that!
i just got home. the top part of the piston measured 94mm (where the rings sit) the rest of the pistons/bottompart/skirt measured at 95.5mm... im guessing this is how pistons are??? and why two diff sizes? why only 94m printed on the back and not 95.5m also?
There is a big difference between 94mm and 95.5mm, so a simple digital caliper will work just fine for this purpose. A micrometer is used for measurements down to .0001 of an inch.
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To accurately measure a piston, you have to measure it at the location specified by the manufacturer or you may get an inaccurate reading.
Originally Posted by JE Pistons website FAQ
6. Is the number on the bottom the part number or the bore size?
No, the number on the bottom is a forging number. JE will soon be laser marking part numbers on new pistons to make future identification easier.
9. How do I know my piston to wall clearance, and where do I get the measurement?
We also supply a piston spec sheet with our pistons to use as a guideline for piston to wall clearances that shows the correct measuring point. If you have any doubt give us a call and we will explain how to measure it.
No, the number on the bottom is a forging number. JE will soon be laser marking part numbers on new pistons to make future identification easier.
9. How do I know my piston to wall clearance, and where do I get the measurement?
We also supply a piston spec sheet with our pistons to use as a guideline for piston to wall clearances that shows the correct measuring point. If you have any doubt give us a call and we will explain how to measure it.
Hope this helps.
The crown of the piston will always be a smaller diameter than the skirting as it sees the most heat and therefore expands the most.
To accurately measure a piston, you have to measure it at the location specified by the manufacturer or you may get an inaccurate reading.
http://www.jepistons.com/dept/tech/faq.shtml
Hope this helps.
To accurately measure a piston, you have to measure it at the location specified by the manufacturer or you may get an inaccurate reading.
http://www.jepistons.com/dept/tech/faq.shtml
Hope this helps.
