2015 Corvette Z07

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09-20-2013, 10:00 AM

#16

Z28x

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Re: 2015 Corvette Z07

Quote:

Originally Posted by ImportedRoomate

That press release was referring to engines built at the Tonawanda engine plant. Yes, the truck 6.2 would be the remaining variant.

With the move of the performance build center to Bowling Green, I assume all higher performance Gen Vs will be built there.

Proof of higher performance engines on the way. Not many people would pay $5k to hand build their LT1.

09-23-2013, 04:09 PM

#17

SSCamaro99_3

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Re: 2015 Corvette Z07

Quote:

Originally Posted by bossco

Hmmm... I suppose so since DI wouldn't let fuel rest in dead areas of the combustion chamber (like the gap between the cylinder wall and piston crown) or in a quench area however slight it may be.

That's the problem with large bores, increased dead space with conventional fuel delivery systems. IIRC that's one of the reasons the LS1 had a less than 4" bore.

It may even be the time it takes the flamefront to propogate across the bore. It may be that x size bore will not allow all of the fuel to burn no matter how it is introduced. Just spitballing, but not feeling confident about a 7.0 Gen V, as badass as it would be.

09-23-2013, 07:30 PM

#18

bossco

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Re: 2015 Corvette Z07

Quote:

Originally Posted by SSCamaro99_3

That didn't even cross my mind since modern fast burn combustion chambers seemed to have licked that problem, discounting the sheer sixe of the motor, is the LS7 considered a "dirty" engine?

09-24-2013, 01:20 AM

#19

ImportedRoomate

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Re: 2015 Corvette Z07

Dual spark plugs - problem solved.

09-24-2013, 08:55 AM

#20

Z28x

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Re: 2015 Corvette Z07

Quote:

Originally Posted by ImportedRoomate

Dual spark plugs - problem solved.

Does Dodge still do that in the Hemi? Are all versions (5.7, 6.1, 6.4)Dual spark plugs?

09-26-2013, 02:30 PM

#21

SSCamaro99_3

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Re: 2015 Corvette Z07

Quote:

Originally Posted by bossco

That didn't even cross my mind since modern fast burn combustion chambers seemed to have licked that problem, discounting the sheer sixe of the motor, is the LS7 considered a "dirty" engine?

I do not have first hand knowledge, but from some things I read, it was close to line. I would think that no matter how good the heads, at a certain bore size, you would outrun the maximum flamefront speed and leave unburned fuel. As emissions tighten, I would think that the limit would decrease as well. I am speculating, and probably talking way over my head, but it makes some sense. The LS7 may not be terrible for its size from a mpg number, but it could be from a particulate point of view, but I do not have any numbers.