Wiseco - Accelerated Performance Turbo Forged Piston Set

[Don@Accelerated]

Originally Posted by arghx7

How was the piston bowl designed on these Wiseco parts?

These design is subaru w/ slight modification of height to lower compression.

[20valvewynn83]

Originally Posted by noAE86

FA20 is direct port and direct cylinder injection,
hence the reason for the piston top, if design is correct then piston cooling should be pretty even from the direct cylinder injection,

to solve the hot spot problem in the 20valve was only a matter of ceramic coating the top, we did this to our unlimited class racer,

don: do you think these pistons will need any coating on them?

I still would like to see a heat test that shows thermal heat within the cylinder.

I would feel better if the piston was coated even if its direct port

[UncleFester]

Originally Posted by Don@Accelerated

By the time we throw E85 into the mix. I bet the rods will be a limiting factor!

Are you working on getting rods made as well?

[Calum]

Don, are the OEM pistons floating or pressed wrist pin?

[xwd]

Originally Posted by Calum

Don, are the OEM pistons floating or pressed wrist pin?

I believe all of the horizontally opposed Subarus use floating wrist pins. The pistons are installed in the block after the rods/crank are already assembled in the case so it would be a little difficult to press a pin in there.

[mastertech86]

dunno if this has been seen before but from what i see in this video looks like normal pistons to me compared to the direct injection 2gr-fse pistons....correct me if im wrong? cause from what i understood the pistons had to be designed a certain way to allow efficient combustion with the direct and port injection like the one rendered on page one...?

right after the 1 minute mark.....ohhh even better its right there in the pic! lol
[ame="http://www.youtube.com/watch?v=g5u2wPplBdY"]2013 Subaru BRZ at the Montreal Auto Show - YouTube[/ame]

[noAE86]

Originally Posted by 20valvewynn83

I still would like to see a heat test that shows thermal heat within the cylinder.

I would feel better if the piston was coated even if its direct port

yes i agree with you there, the more safe guards the better,

[kmbkk]

Sounds great Don, appreciate you keepng us updated!

Originally Posted by Don@Accelerated

Don't know yet, but I would suspect pricing similar to the majority of other 4 cylinder kits.

Customs sets will be priced slightly higher.

[Don@Accelerated]

The pistons in the video are not BRZ

[Draco-REX]

Originally Posted by Don@Accelerated

The pistons in the video are not BRZ

Yup, wrong rods, wrong crank, and wrong pistons. That's an EJ reciprocating assembly.

[Synack]

I can't wait to find out how much PSI a bone stock motor can handle.

[Coheed]

Originally Posted by Synack

I can't wait to find out how much PSI a bone stock motor can handle.

I would guess around 8psi is max on this engine on pump gas. Even that would have compromises in the tune to limit detonation I believe. But perhaps the DI will prevent this?

8psi with 93 or even 100 octane could be tuned for better results. But I do wonder how well this motor can resist detonation or high temps that could melt pistons.

[Synack]

Originally Posted by Coheed

I would guess around 8psi is max on this engine on pump gas. Even that would have compromises in the tune to limit detonation I believe. But perhaps the DI will prevent this?

8psi with 93 or even 100 octane could be tuned for better results. But I do wonder how well this motor can resist detonation or high temps that could melt pistons.

If so, I'll be running 6-7psi until I upgrade internals.

[Don@Accelerated]

Originally Posted by Calum

Don, are the OEM pistons floating or pressed wrist pin?

Yes. I have never seen a subaru without a floating pin. Although I have to admit, I like a challenge when assembling!