FA20 OEM pistons, are they Forged or Cast ? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

adprokid · 02-01-2012, 02:35 PM

any idea ?

Guff · 02-01-2012, 02:39 PM

Aren't most modern components cast?

wichiewichie · 02-01-2012, 02:48 PM

Almost a 100% sure the pistons should be cast. Can't think of a reason to be otherwise, and cast are a lot cheaper.

adprokid · 02-01-2012, 02:51 PM

Quote:

Originally Posted by Guff

Aren't most modern components cast?

yes most engines has cast internals.

Syldrin · 02-01-2012, 03:06 PM

i would agree most cars now a days have cast pistons

Dimman · 02-01-2012, 04:20 PM

2JZ had cast pistons, why the hell would this one get forged?

Exage · 02-01-2012, 04:28 PM

Quote:

Originally Posted by Dimman

2JZ had cast pistons, why the hell would this one get forged?

Perhaps the question would be better suited on the con-rods and crank...

Tip: Better to beef up the bottom then waste time at the top. More likely to throw a con-rod out the side of the block then melt a hole through the piston (unless you do something really stupid with the fuel).

adprokid · 02-01-2012, 04:44 PM

Quote:

Originally Posted by Dimman

2JZ had cast pistons, why the hell would this one get forged?

The ej207 comes with forged pistons.

Syldrin · 02-01-2012, 05:55 PM

the EJ25 comes with forged rods.

adprokid · 02-02-2012, 01:38 AM

Quote:

Originally Posted by Syldrin

the EJ25 comes with forged rods.

i was talking about EJ207 the 2.0 engine found jdm sti

OrbitalEllipses · 02-02-2012, 02:53 AM

Quote:

Originally Posted by Syldrin

the EJ25 comes with forged rods.

As pointed out, it does not.

I will bet you many things that it comes with hypereutectic pistons. For the uninitiated, hypereutectic pistons are cast.

WingsofWar · 02-02-2012, 03:10 AM

Quote:

Originally Posted by OrbitalEllipses

As pointed out, it does not.

I will bet you many things that it comes with hypereutectic pistons. For the uninitiated, hypereutectic pistons are cast.

i thought EJ207 and EJ255 and EJ257 stopped using forged internals other than the crank after V7. And all recently built performance EJs from the factory where cast rods and pistons.

OrbitalEllipses · 02-02-2012, 03:17 AM

Quote:

Originally Posted by WingsofWar

i thought EJ207 and EJ255 and EJ257 stopped using forged internals other than the crank after V7. And all recently built performance EJs from the factory where cast rods and pistons.

I don't recall specifics, but I know for a fact that the V7 EJ207 was the last with forged pistons. I just don't recall any engine EXCEPT the EJ207 getting forged internals. Even if the EJ257 or EJ255 have forged rods, they're decent, but nothing to write home about. I'd have to check NASIOC to be certain, but I'm fairly sure I'm right.

HomemadeWRX would know off the top of his head.

mines13 · 05-23-2012, 12:59 AM

The last relatively inexpensive naturally aspirated production car I can think of that came with forged pistons and rods was the S2000.

02-01-2012, 02:35 PM	#1
adprokid Senior Member Join Date: Dec 2010 Drives: ZN6 / GDB-G Location: Far Posts: 589 Thanks: 710 Thanked 263 Times in 133 Posts Mentioned: 0 Post(s) Tagged: 1 Thread(s)	FA20 OEM pistons, are they Forged or Cast ? any idea ?

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02-01-2012, 02:48 PM	#3
wichiewichie Member Join Date: Dec 2011 Drives: Audi A3 Location: Puerto Rico Posts: 23 Thanks: 49 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Almost a 100% sure the pistons should be cast. Can't think of a reason to be otherwise, and cast are a lot cheaper.

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Syldrin Troll Feeder Join Date: Nov 2011 Drives: boosted scion tc. Location: camp pendleton Posts: 568 Thanks: 14 Thanked 11 Times in 8 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	i would agree most cars now a days have cast pistons

02-01-2012, 05:55 PM	#9
Syldrin Troll Feeder Join Date: Nov 2011 Drives: boosted scion tc. Location: camp pendleton Posts: 568 Thanks: 14 Thanked 11 Times in 8 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	the EJ25 comes with forged rods.

05-23-2012, 12:59 AM	#14
mines13 Join Date: Nov 2011 Drives: '13 FR-S '12 CBR1000RR Location: Irvine, CA Posts: 1,038 Thanks: 305 Thanked 527 Times in 241 Posts Mentioned: 22 Post(s) Tagged: 0 Thread(s)	The last relatively inexpensive naturally aspirated production car I can think of that came with forged pistons and rods was the S2000.

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