Dyno #s of z/28, Ford GT350 & GT350R

[khell86]

The z/28 dyno'd pretty high as well. I havent seen a lot of z/28's dyno'd but the one that I have seen dyno'd around 455, which is still pretty efficient.

[matt55]

Originally Posted by rayhawk

Well the LS7 redlines at 7000, and crosses 400 whp at 4800, so that is actually a 2200 rpm spread, the voodoo pulls over 400 whp from 5700 to 8200 redline, or 2500 rpm.

You have a point there , never dug into the redline of the ls7 I was just going off that dyno .

[GretchenGotGrowl]

[QUOTE=DGthe3;8696291]That doesn't change the fact that it means nothing for a car.

You could be making 342 hp/L ... but if its from a 750cc engine you're only making 257 hp. Meanwhile, even a lowly 39 hp/L engine can get you 400+ hp if you make it big enough. Which one will result in a faster car? The one with more power, right?
[\QUOTE]
Granted. I'm saying you can't talk about just one metric and get the complete picture. I can turn the arguments with different numbers. Say I have a 3.8L engine that makes 150 HP/L (570 HP) and a 5.2L engine that make 100 HP/L (520 HP). On face value most would say the 3.8L is better because it makes more power.

[QUOTE]
If you're thinking 'well, it depends on how much the engine weighs' I would agree. But doesn't that then defeat the logic of hp/L being an important engine metric? Making the one of actual importance hp/lb?
[\QUOTE]
True, but if we are talking about acceleration adding weight and HP are not an equal proposition. Generally 1 HP equals about 10 sprung pounds. So, in the example above 5.2L would have to weigh 500 less pounds to offset the HP advantage. That of course ignores aerodynamics. It also doesn't say anything about weight distribution of the whole vehicle.

I can't think that Ford developed the Voodoo because of displacement taxes (which are downright idiotic). Odds are 80+% of the GT350's are going to be sold in North America. And there aren't going to be all that many sold here to begin with. So it would be an enormous investment to make a small number of cars (which I'm sure are going to be pretty pricey in foreign markets anyways) a little more affordable to a few customers. The bean counters at Ford are more responsible than that.

Nope, Ford probably didn't give it much thought. However, most of the cars it was being compared to on the list do worry about it. Porsche and Ferrari has been pretty successful designing engine platforms that support a narrow range of displacements (keeping weight down), and just making them more power dense. It's not the only thing that matters to performance, but it is a useful metric none the less.

[xc_SS/RS]

So does everyone still think the Z/28 will slot into the middle of the two? Faster than the GT350 but slower than the GT350R?

I'm curious to see how much of an advantage the tires give the Z/28. I understand those Pirellis are pretty much slicks so it'll be interesting.

[crysalis_01]

What im very curious about is which version of the non-R they're testing? Track Pkg is what every enthusiast wants to see, but we might see a Tech pkg 350 run in the MT head2head vid.

GT350R>Z/28
GT350Track=Z/28
Z/28>GT350Tech

That's my prediction.

[GretchenGotGrowl]

Originally Posted by xc_SS/RS

So does everyone still think the Z/28 will slot into the middle of the two? Faster than the GT350 but slower than the GT350R?

I'm curious to see how much of an advantage the tires give the Z/28. I understand those Pirellis are pretty much slicks so it'll be interesting.

I still think that it will fall between the two, but I'll be happy if I am wrong.