http://media.gm.com/us/powertrain/en/product_services/2008/08car.htm

Looks like the rumors were correct about no manual tranny available until 2009.

:banghead:

It lists premium for the L76.

It lists premium for the L76.
And:
"Yet the 6.0L (L76) heads maintain a compression ratio and calibrations that allow these engines to operate on regular gas. "

Odd....

Looks like the rumors were correct about no manual tranny available until 2009.

:banghead:

2009MY or just 2009?

The manual wasnt expected for another 6mths after anyway, so if the G8 drops in feb. six mths later would be starting a 2009MY.

Thanks for the link.
I wonder if the delay for the manual has anything to do with de-activating all the AFM stuff and Re-testing that engine change in the G8?

The What's New "WN" link is very in depth and taught be a lot about the workings of the L76.

If I am reading it correctly, it looks like the tranny is rated up to 469bhp and max torque 439 lb-ft.

Yes, "premium" is recomended, but that is the new catch phrase, it means that the HP and Ft-lbs measure were with "premium" but that it can run on regular unleaded (just lower numbers).

When it says premium is "required", then you can't use regular for extended stints (only once in a while).

Make sure you always read the key words.

Anyone else notice that 300ft-lbs or more is available from 1500rpms on up? Pretty flat curve for torque and pretty steep for HP.

Sounds like it is built and tuned for super. If you put in regular, you will loose horsepower. Honda does it the other way. They tune it for regular and state the horsepower there. If you put in super it will raise the horse power. If we pay for an after market tune we won't gain as much.

umm.. you actually get more horsepower out of regular gas. Depending on the tune of the car anyway. THe higher the octane, the harder for the fuel to burn, like in a high compression engine. In those cases, it is required to prevent premature ignition of the fuel and knocking.

To put it another way, you get the most horsepower out of the lowest octane that doesn't cause knocking (premature detonation) in your engine.

Yes, higher octane fuel does have less internal energy and requires higher ignition energy to start combustion. But the higher requirements for ignition allow increased timing and/or increased compression, which typically more than makes up for the internal energy deficit.

Older engines that aren't capable of adapting usually lose a little power and MPG. Newer engines tuned for regular are more capable of taking advantage of increased octane once it figures out it can increase timing without knock.

Older engines that aren't capable of adapting usually lose a little power and MPG. Newer engines tuned for regular are more capable of taking advantage of increased octane once it figures out it can increase timing without knock.

That is the trick nowadays. the ECU's are more adaptable and able to tune themselves to some extent. That is about the extent of my understanding now :D

the SAE #'s were actually on 87 octane Amoco. I mean if you guys think a 6.0L with L92 heads and LS3 intake only makes 361 on premium we have a problem ;)

the SAE #'s were actually on 87 octane Amoco. I mean if you guys think a 6.0L with L92 heads and LS3 intake only makes 361 on premium we have a problem ;)

Less claimed HP = lower insurance rates.:driving:

Higher octane fuels allow you to be more aggressive with the tune due to the fuels ability to resist detonation, knock, and pre-ignition. They may contain less energy, but that amount is negligible next to what can be gained back with proper ignition and fuel maps and the right parts.

Less claimed HP = lower insurance rates.:driving:

No thats really what it makes on 87 :)

Less claimed HP = lower insurance rates.:driving:

And in Australia, less adverse publicity for the Australasian College of Surgeons who continually remind Government of the evils of BHP/Kilowatts, inexperienced youth and the Emergency Wards at hospitals on Saturday nights!!!!


Mike

Less claimed HP = lower insurance rates.:driving:

Not anymore. Now they go by how often that particular model of car is in a crash/stolen. Which is why Hondas are pretty expensive to insure compared to competitor's cars.

And in Australia, less adverse publicity for the Australasian College of Surgeons who continually remind Government of the evils of BHP/Kilowatts, inexperienced youth and the Emergency Wards at hospitals on Saturday nights!!!!


Mike

I thought if you have your P plates you cant have a V8 car.