EJ257 and compatibility of Yellow injectors and ECU6S

[Grey Haired]

Is it practicable to run V3 ECU STI 6S with a EJ257 motor and V3 STI heads? (or even possible?)

[hijacka]

No its not.

Have you got this engine combo?

[Grey Haired]

No just thinking I might as I have a V3 and want a later motor but don\'t really want to change everything.

So was thinking of using the V3 control gear and heads.

[Timmah]

 Grey Haired said:

No just thinking I might as I have a V3 and want a later motor but don\'t really want to change everything.

So was thinking of using the V3 control gear and heads.

Any reason for a \'later motor\'?? Could buy a EJ207/V7 STi short block from Subaru, slap your heads on and live happy. But if your current motor is fine and you\'re not going to aim for power power, it seems like a unwise use of $$.

[Grey Haired]

Just thinking bigger motor (2.5) MORE POWER.

Had been told by someone put a fuel reg on turn up the pressure and the EJ257 would run OK.

[Guest]

 Grey Haired said:

Just thinking bigger motor (2.5) MORE POWER.

Had been told by someone put a fuel reg on turn up the pressure and the EJ257 would run OK.

You need new friends.

Adding displacement without tuning or adding the necessary bits to make it run correctly is about as bad as adding another 10psi of boost coz it goes way fasterer g.