[radz28]

Originally Posted by Russell James

A cam and lifter change would be nice. Without that, not a chance at 570. It could also use some decent exhaust manifolds. The Camaro log style manifolds belong on a taxi not a performance car.

No power steering pump should be good for a couple hp. Which might have then been lost in the Camaro exh manifolds taking it back to near 550.

In the past, small cam changes have occured without an LS designation change. LS1's and LS6's had a couple different cams depending on the year. The first year the LS6 came out it had a pretty mild cam. The next year it went to 405 hp with a better cam and screamed. A little cam bump like that would be nice, along with some larger wheel lifters.

The way you're posting seems like you think LSA in CTS-V doesn't have manifolds on it already. Nothing is changing, that we know of, in that, because ZL1 is just getting revised stainless cast manifolds. I seriously doubt they're going to restrict more power than CTS-V, especially considering packaging between the Sigma and Zeta II chassis seem to results in a little more efficiency for the Zeta II. I seriously doubt ZL1's manifolds are going to restrict flow more than the current CTS-V manifolds.

I wouldn't call head, piston, cam, intake manifold, exhaust manifold, cats', and even block differences small as you have in comparing LS1 to LS6. Heck - hollow-stem intake valves and sodium exhuast valves with better springs filled the new 243 heads on LS6. The 405 horse' also came with a better air cleaner if memory serves. These are not small changes.

Originally Posted by Shurenuff

I just don't understand the logic in releasing the 550hp number nearly a year in advance before being able to produce a vehicle. What's the advantage in that if you're not going to exceed that number? It just makes it easier for Ford to easily top it shortly after the ZL1's release.

I expect over 560hp or what's the point?

I have nothing to support that idea except ZL1 has a less restrictive, dual-mode exhaust and because LLT in CTS-V makes less power than in CAMARO, so I just think the packaging is a little better in CAMARO (I'm suggesting if we were to see LSA go straight from CTS-V to ZL1, we'd see a similar bump in power and efficiency, too). In addition, because GM went to such great lengths to keep LSA quiet, I'm sure there are other restrictions in the intake and exhaust that won't impose as high a restriction as CTS-V. I notice there are several plugs in ZL1's intake tube, between the TB and air cleaner that were deleted at the time. CTS-V has at least one resonator, which restricts air flow to control intake roar and whine, so if ZL1 doesn't get any, I think we'll get a little more power there too. I still think there's a small chance at a revised cam, too; it'd be nice to see LS9's cam in there, but that's probably asking too much, lol.

Originally Posted by RLHMARINES

I truly believe that the LSA as installed in the ZL1 will not disappoint in the hp rating and be a hell raiser of a package. GM has tested this car and its drivetrain on numerous tracks across the world and has vowed not to be just competitive but to be a winner in this segment. I believe that those exhaust manifolds will flow well enough but more importantly reduce under hood temps which is a power robbing additive for a supercharged engine. I WILL KEEP THE FAITH. Because the FBODFATHER tells me so. That is all that I need.

Originally Posted by bobby35ny

All we have to do is keep an eye on 2012 CTS-V news. Whatever they do there will carry to the ZL1.
-bobby

I've been saying and thinking CTS-V and ZR1 should be do for a power bump very soon