[Grape Ape]

Originally Posted by XanthosV6

1 Horsepower...

In all seriousness, I'm shooting for naturally aspirated 380 flywheel horses for under 2500 on my 3.6 DI - at least, the one I will be getting - and have a solid plan for getting there. 400 wouldn't take much more, but I don't want to sacrifice the fuel economy to get there.
- Xanthos

P.S. - In case you're interested, I'm going with a custom spectre modular air intake, ported throttle body for venturi effect, semi-full exhaust (shorty headers once somebody makes them, high flow cats, mufflers), higher ratio rocker arms, and custom tune. I'm reasonably confident this will get me to at least 380 flywheel horses, if not more, seeing how a cold air intake and cat-back with no tune netted 340 flywheel horses on the CTS with this engine. IF somebody makes a set of mild cams for the right price, and they don't seriously effect fuel economy, I might hook myself up with a set as well to hit that 400 flywheel horsepower mark. I might also advance the ignition timing a few (2-3) degrees and see where that gets me.

P.P.S - As far as DI and boost - in some ways it will help, in others it won't. You still have to worry about blowing gaskets and whatnot from the sheer pressure, but the DI has a cooling effect on the air/fuel mixture - not to mention that the droplets are smaller so will provide a more even mixture - that will burn more evenly with less chance of knock. Its like having an inherent intercooler. At least, on paper. We won't know for sure till somebody straps a turbo/super up to one.

Does the LLT have rocker arms? I thought that the cams acted directly on the valves like most (all?) DOHC engines.