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Old 05-09-2013, 04:54 AM   #12838
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Originally Posted by sho928 View Post
Regarding emissions certification.

If the Z28 is having difficulties passing current standards, would the in place technology for the C7 not be readily be available (it would require a modification of the cylinder head casting to include direct injection)?

I can imagine with the huge ports; intake velocity is too low at idle to fully atomize fuel with a port injection set up.

Direct injection and variable valve timing will clean up idle emissions (they do it for 9000-rpm Ferrari and Porsche).

As you all know; valve/port sizing and cam timing optimized for producing power at high rpm will compromise low speed running or idle, hence all super car manufacturers have the direct injection and variable valve timing in their tool box
I don't see how they would be having difficulties passing emissions standards since the motor is the same that was used in the Z06 and for the Special Edition 427 convertible corvette.
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