4G93 block with 4G92 Mivec pistons

Jan 30, 2017
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Hi all,

Looking to increase CR on my mirage. Currently on SOHC 4G92 head & 4G93 block with Toyota 4AG-ZE low compression pistons. Previous owner's plan was to turbo the car but dint get around to do it. I would like to keep it as NA and planning to bring CR to 10.5/11:1, RON 97 with Unichip piggyback.

1 - Will I be able to fit in 4G92 Mivec pistons to my 4G93 block with ease? Will the pistons be able to clear and not knock into the valves?
2 - Will I have to skim the block?
3 - What thickness of gasket to use?
4 - How about timing belt?

Thanks
Ben
 

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^pomen_GTR^

7,000 RPM
Senior Member

^pomen_GTR^

7,000 RPM
Senior Member
May 13, 2010
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The Mines
just install 92 sohc piston and you were good to go...

plus with sohc 92 head u cant do much on high compression setup