If you want to put any power to the ground, then no. I assume you want a 4g64 because you want a "stroker"?

They have handleD 22psi on a evo8 16G making 400+hp on E85. Have a pro tuning it and you should do just fine.

Mj, I have to say your friends car was a freak of nature, and probably belongs in a stock block record. Except he broke rod bolts right?

MJcanada said:

They have handle 22psi on a evo8 16G making 400+hp on E85. Have a pro tying it and you should do just fine.

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That is impressive! when i boosted my sohc 4g64 I ran 8 psi all day long. I had no problems what so ever on stock internals. iirc at that time People told me 12 psi would be pushing it.

Cdc1221 said:

Mj, I have to say your friends car was a freak of nature, and probably belongs in a stock block record. Except he broke rod bolts right?

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After a few months(maybe more, held up for awhile) of beating on it yes. But the same would happen to a turbo 63 as well. Same rod bolts in both.

I've heard the pistons are far weaker than even stock 4G63 non-turbo pistons because of the pin setting...what I don't remember is if that applied only to the G4CS blocks, or included the 4G64 as well.

JusMX141 said:

I've heard the pistons are far weaker than even stock 4G63 non-turbo pistons because of the pin setting...what I don't remember is if that applied only to the G4CS blocks, or included the 4G64 as well.

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I'm fairly certain thats just the g4cs. I asked John about this and he said the pistons are about the same as stock turbo pistons. Said crown thickness was pretty good.
As far as I know the weakest link in the 64 is the rod being 7 bolt(thin). Rod bolts in both 63/64s seem to need upgrading above 400+. Though after 100'000 the bolts could probably take more if replaced with brand new ones. Though there is significant difference in torque between a boosted 2.0 & 2.4.
The pistons weakest point, with a 64, I see would be ringland height being n/a.
Other than that it holds as much as a stock turbo 63.

I use to be a budget builder and I have actually ran those pistons and they worked fine .Just make sure you tune it and don't advance the timing much on gas.E85 would be better for reliablility

I would be more worried about blowing a piston ring. Not made for boost, nor set for it if used.