EJ22T Pistons

Heads, valves, pistons, rods, crankshaft, etc...

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LSiTurbo
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Re: EJ22T Pistons

Post by LSiTurbo »

Ah my apologies. When I talk about the oversize of the pistons I'm talking about it relative to the original bore of the Buick V6 which is 96.5mm. So a 0.5mm oversize to the Buick bore would be 97mm, 0.75mm oversize would be 97.25mm
Legacy777
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Re: EJ22T Pistons

Post by Legacy777 »

Ok, thanks for clarification.
Josh

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1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT

If you need to get a hold of me please email me rather then pm
klin7757
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Re: EJ22T Pistons

Post by klin7757 »

Old thread, but I'm still a bit stuck on the compression ratio of these pistons. If the pistons have a dish of -13.3 and sit 3mm below deck, then wouldn't there be a -22.12cc added to that -13.3 dish? I get 7.48:1 with stock heads/gaskets and 7.86:1 with the thinnest Cometic .027" gasket.
94TW red.
Legacy777
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Re: EJ22T Pistons

Post by Legacy777 »

I'm not sure the original user is still around and on the bbs regularly. You could try sending a PM.
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT

If you need to get a hold of me please email me rather then pm
Turbone
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Re: EJ22T Pistons

Post by Turbone »

Resurrecting this old thread, doing some research
Have a spare EJ22T with bad cylinder walls and what I was thinking (along the lines of the OP's work) if it would be possible to use EJ2.5 pistons if the cylinders are bored appropriately. Would the cyl walls be too thin for boost?
89 RX w/2.2T
03 Fozzy
Legacy777
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Re: EJ22T Pistons

Post by Legacy777 »

How much would you need to oversize the EJ22t bore to fit the EJ25 pistons?
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT

If you need to get a hold of me please email me rather then pm
Turbone
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Re: EJ22T Pistons

Post by Turbone »

Legacy777 wrote: Fri Aug 25, 2023 12:11 am How much would you need to oversize the EJ22t bore to fit the EJ25 pistons?
I'm horrible at math, I will prob need to ask my machine shop guy. He works on Subaru blocks and heads, so he would most likely have the answer
89 RX w/2.2T
03 Fozzy
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