hi,

i read message about vab 2lt jdm engine has forged pistons like v7 ej207 engine. block number is 10103AC510. where can i verify this? i didn't find any information about this block. if it's true this block could handle more than v7 ej207 sti block.

regards,

semih

 

no they are fitted with the later "hyperpeutic" style piston as all 03> JDM STi's are..........

 

 

its a high silicone type piston to allow tighter tolerances BUT as shown by the (mainly) 2.5 engines that isn't always a good thing........

it isn't as strong as the earlier factory 'forged' pistons

 

 

Ringland failure isn't as common on the 2.0 tho,

I always thought it was rod/rod bearings that were the weak point,

My 2003 UK Sti Engine is going fine at 450ish

 

Always thought it was hypereutectic

https://en.wikipedia.org/wiki/Hypereutectic_piston

 

May find this helpful

https://forums.nasioc.com/forums/sho....php?t=2385141