no more EGR ??

[mbeach]

I'd have to check to be sure, but the addition of the exhaust gas to the intake tract also helps to keep cylinder temperatures lower. This could be a matter of keeping the miture from becoming too lean, or it could be something else.

I say keep your nuts tight and leave the EGR valve in place.

[Joe_Black]

I would be hesitant to remove it because, as mentioned above, our engine was deveolped to have an EGR system from the outset rather than added on to meet some Federal mandate. Even in other nations with different emission requirements the 6VE1 still has the EGR system, which IIRC complements the variable-length intake runner design.

Of course we're always interested in the results if you're willing to become the guinea pig.