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The mkiv Supra Owners Club

Anyone seen 2JZ-GTE forged pistons with cooling channels?


Chris Wilson
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The stock MKIV TT pistons are cast with a cooling gallery in the crown, like Skyline ones, fed with oil from a fairly large oil squirter hole in the con rod. All the forged ones I have yet to see haven't got this gallery. I found Tomei ones for my own Skyline engine that are forged, and have a cooling gallery. They don't do Toyota ones thaogh. I am 90& sure they don't exist, which is a shame as they remove a LOT of heat very effectively. Anyone seen any?

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2JZ at bottom

http://www.tomei-p.co.jp/_2003web-catalogue/058_EJ22_piston.html#2JZ

 

And explanation of oil cooling proporties..

http://www.tomei-p.co.jp/_2003web-catalogue/050-051_piston.html

 

 

You'l need to google-translate

 

 

I don't think the Tomei 2JZ-GTE are available with cooling channels.

 

I have the English vesrion of the cooling channel info at:

 

http://www.chriswilson.tv/tomei/efr_index.html

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Hmm how much do the Tomei's weigh?

 

 

My Skyline RB26 ones at 86.5 mm, with cooling channels, were 475 grammes from the factory, with titanium coated rings and pins fitted. I got them down to 430 grammes by machining and hand finishing. I could get more off them with modern tapered pins, but didn't go that far.

 

I can find no reference to Toyota 2JZ-GTE pistons on their current site, using the English option, sorry.

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