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Originally Posted by MikeSTI
wow you guys just have it all dont you
MikeK - I cant believe even you came to the table with somthing..........
............I guess I should just give up and bow down because you guys cant be wronge
The Lancer Evolution is powered by a proven and potent version of the 2.0-liter, 4G63, DOHC, four-cylinder engine design that has been steadily refined for improved durability, flexibility and peak power over the past decade. The engine's reciprocating assembly has been suitably reinforced with forged metal components to better withstand the increased cylinder pressures of forced induction. cant seem to figure out why it only makes sence to me but ohh well  |
First the sarcasm is unnecessary. No one else is insulting others, just posting their technical opinions.
Second, I'm not even sure what you're arguing. Are you trying to say the only difference between the EVO motor and the WRX's 2.0L motor are forged pistons? That the reason the US WRX doesn't make the same power as the EVO with just bolt ons is because the US WRX doesn't have forged pistons?
As far as I can tell, everyone's agreeing that forged pistons in a 2.0L EJ motor would be better than not. Everyone's also saying that the EVO does very well to make lots of power out of an old design, and using forged pistons is part of that equation.
However, the US EJ205 (the 2.0L WRX motor) simply can't make the kinda of power an EVO can make even with the addition of forged pistons, since the design of the block itself leads to detonation. If that weren't the case, then there wouldn't be an EJ205 and an EJ207 (JDM 2.0L STi motor). If the EJ205 could make the power that the EJ207 makes just by adding forged pistons, then they're wouldn't be an EJ207.
the real reason for the two motors is that the better EJ207 can't come stateside because it won't pass US emmissions and fuel mileage requirements, forged pistons or not. That is the entire reason for the development of the EJ257 (2.5L US STi motor)... which doesn't need forged pistons to make the same power as the EJ207 because of the displacement.
Basically, the EVO motor makes more power than the WRX with bolt ons because it's got a better block, and not just forged pistons. If you want that kind of performance out of a 2.0L subaru motor, then you'll need more than just forged internals, you'll need the better EJ207 block, which Subaru simply can't sell in the US. Instead we get the EJ257 which is basically the same motor as the EJ205 as far as it's ability to pass emmissions and mileage requirements, but has the extra displacement that allows it to make power like the EJ207.