OST and JE Piston collaborate - New piston!
06-27-2014, 11:30 PM (This post was last modified: 06-28-2014 12:29 AM by oldeskewltoy.)
Post: #3
RE: OST and JE Piston collaborate - New piston!
(06-27-2014 10:42 PM)Bean Bandit Wrote:  Wondering how much they differ from my custom JEs

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BB from his build Wrote:to my specifications...
CR=11.43; Piston Volume 3.5cc; valve reliefs: for stock diameter but more lift; compression height 30mm (instead of 30.5)

your crown volume 3.5cc, mine 2.5cc, your comp height 30mm, mine 30.5mm, your raised crown is just the center, my raised crown goes all the way out to the outer edges of the valve reliefs...

but I will admit your piston was part of the inspiration... but the AE851 piston was the inspiration for the actual crown design.

Here is what I mean about the difference in crown width... OEM 10.3 view on top
[Image: AEU86 AE86 - RE: OST and JE Piston colla...ew piston!]

Dan -

You can |Sad .... OR you can ask for help!!!

OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991
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RE: OST and JE Piston collaborate - New piston! - oldeskewltoy - 06-27-2014 11:30 PM

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