6.2 instead of the 7.0?

[Brett]

Does anyone know why GM is using the 6.2 engine instead of the 7.0 in the ZR-1?

I'm assuming there is an obvious answer.

The Lingenfelter 7.0 twin turbo puts out 880 horsepower. Is it the simple fact that it would be too much horsepower?

 

[Hib Halverson]

Cylinder wall thickness and durability.

 

[67HEAVEN]

That guarantees somewhere for them to upgrade to in subsequent years.

 

[Hib Halverson]

My guess is there will not be a significant upgrade of the LS9 from GM, though, for the first couple of years, tuners will have a field-day.

In fact, the LS9 and the 3Gen ZR-1 may be the pinnacle of Corvette performance in most of our lifetimes.

Why?

Well, both houses of Congress have now passed bills revamping CAFE. Though the final bill has to go through conference, Bush has indicated he'll sign a law that will could incrrease CAFE by up to 40% in the next ten years.

More ominous are moves to regulate CO2 emissions. Over in Europe that is farther along that it is here but, when that comes it will impact high-performance engines the most because the only way to make significant decreases in CO2 is to reduce the fuel burned. To make significant reductions in that, requires reducing power output.

Yes, there are some fuel economy gains to be had with direct injection, AFM and computer-controlled cam phasing but even if all that could help Corvette get enough better mileage that it could be sold in 2013 without a guzzler hit, there is still the problem of CO2 emissions.

Both houses of Congress are democratically controlled now and the majority will increase in size. It's likely the Presidency will turn-over in 08. With Democrats controlling both the Oval Office and the Congress, the greens are going to have a feeding frenzy of air quality legislation. That coupled with the possibllity that high-performance cars and full-sized trucks may become socially unfashionable, might just put an end to the performance increases we've seen come just about non-stop since 1982.

Bottom line: If you like fast Vettes and you got money, the new ZR-1 just may be as good as it ever will get.

 

[*89x2*]

It's likely the Presidency will turn-over in 08. With Democrats controlling both the Oval Office and the Congress, the greens are going to have a feeding frenzy of air quality legislation. That coupled with the possibllity that high-performance cars and full-sized trucks may become socially unfashionable, might just put an end to the performance increases we've seen come just about non-stop since 1982.

Let's hope you are wrong :W hnoes :ugh

 

[67HEAVEN]

[Charlton Heston] From my cold, dead hands! [/Charlton Heston]

 

[ROCKETBLOCK]

My guess is there will not be a significant upgrade of the LS9 from GM, though, for the first couple of years, tuners will have a field-day.

In fact, the LS9 and the 3Gen ZR-1 may be the pinnacle of Corvette performance in most of our lifetimes.

I'm thinking you are pretty close there Hib. :ugh

 

[Brett]

Cylinder wall thickness and durability.

I see. So what engine block does Lingenfelter use in their 7 liter twin turbo?

 

[Eric]

My guess is there will not be a significant upgrade of the LS9 from GM, though, for the first couple of years, tuners will have a field-day.

In fact, the LS9 and the 3Gen ZR-1 may be the pinnacle of Corvette performance in most of our lifetimes.

Why?

Well, both houses of Congress have now passed bills revamping CAFE. Though the final bill has to go through conference, Bush has indicated he'll sign a law that will could incrrease CAFE by up to 40% in the next ten years.

If you're right, at least we'll all be able to say we were here to see it. Yeah, that makes me feel a lot better about it.

 

[Hib Halverson]

If you're right, at least we'll all be able to say we were here to see it. Yeah, that makes me feel a lot better about it.

Actually, with a little more research, I now feel that CAFE is not the big threat to cars like the ZR-1 and the Z06 that I thought it would be.

At this point, I feel the big problem with performance cars and trucks will be coming legislation that regulates CO2 emissions.

 

[Brett]

Answered my own question. LPE uses the LS7, and they also run 17.5 psi. Which is quite a bit more boost than the LS9. It also uses 100 octane. So how come cylinder wall thickness did not deter them? Just simply because it does not need to make the warranty requirements of a factory built car?