Forums/Z31P/z31-performance-upgrade-forums engine-mechanical-aa/VG33E max bore piston options

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mwolvinm: (2017-10-10 16:49:13)

This thread states on page 1 that a VG33E could be bored out to 99mm safely for use with a turbo:

https://z31performance.com/forum/z31…-will-not-work

However the limiting factor for us cheapskate Z31 drivers (that includes me!!!) was finding a piston that would work that wasn't cost prohibitive. Has anyone looked at the 98mm piston out of a VK56DE?

from club titan:

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PISTON, PISTON RING AND PISTON PIN Available Piston

Piston skirt diameter “A”

Grade No. 1 97.980 - 97.990 (3.8575 - 3.8579) —

Grade No. 2 97.990 - 98.000 (3.8579 - 3.8583) —

Grade No. 3 98.000 - 98.010 (3.8583 - 3.8587) —

Grade No. 0

(Service)

98.180 - 98.210 (3.8653 - 3.8665) 0.20 (0.0079)

“H” dimension 39 (1.54) —

Piston pin hole diameter Grade No. 0 21.993 - 21.999 (0.8659 - 0.8661) —

Piston to cylinder bore clearance 0.010 - 0.030 (0.0004 - 0.0012) 0.08 (0.0031)

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reference:

http://www.clubtitan.org/forums/58-v…imensions.html

Thoughts???? It looks like it uses the same wrist pin as the W series and VG30DE. Am I missing something?

Is this a cheap option?

http://www.rockauto.com/en/catalog/n…ne,piston,5620

from the white paper I saw, it's a dish design based off of the VH45, which is a proven overbore piston for the VG33E

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Augustus Maximus: (2017-10-16 00:35:07)

$900 will get you a custom set of forged pistons built to whatever mythical ideas you have about your VG33E. Pick up a set of rods too, OEM and crap have a way of making an exit through the block.