Quote:
Originally Posted by WHAMMO
Yesss yes yes!! I want to hear more about the NA version of both those engines. But lets play with numbers;
LS3 438hp
LT1 455hp
Detune twin turbo DOHC 500hp, massive tq
Better tune DOHC 550hp.
So they are going to need NA 4.2l of 475hp at mimimum and the 5.0l a minimum of 500hp IMO.
So all those turbos for 500hp? ...I dont know. Good for EPA and emissions I guess.
My wish; 490hp 4.2l and a 540hp 5.2l NA. But that wont happen unless moon revin setup...
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Yes, the N/A versions of these motors will need to rev high to get high HP numbers. Hence the DHOC.
But what I don't see (so far), is confirmation of the rumor that these engines will be flat plane crank (FPC). This article (the OP posted) doesn't mention FPC, but that was part of the original rumor about the 4.2 and 5.5 DHOC motors. A 5.5L engine would have to rev over 8,000 RPM's to get to the 540HP you would like. A FPC would help with that. BUT, as we have seen with the Voodoo, large displacement and FPC tend to have vibration issues. We will have to wait and see...
But, a 550 HP (or so) N/A 5.5 FPC DHOC might just make a good engine choice for a Z/28...