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Originally Posted by MikeSTI
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Originally Posted by BAN SUVS
The US STi couldn't run on the EJ207 because of emissions requirements and low fuel grade. It just can't be done.
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and thats way the Evo 8 & MR are having such problems 
I would bet Subaru could have done it, just didnt want to spend the money to make it happen.......... |
The 4G63 is as different from the EJ20 as two turbo motors with similar displacement can be. Apples and Oranges. no amount of R&D can make up for the fact that 91 octane gas licks balls and there are very strange EPA drive cycle emissions requirements that we the public know almost nothing about. The 4G63 is not knock limited on 91 as much as an EJ20 is, hence the 276hp Evo.