Originally Posted by Kakdiesel1
Didnt want this to be power trip posts but, from my limited experience this car feels like it can run 12's all day WO a tune. Yes I have an Auto and maybe this is Apples to Oranges and Turbines do not compare to NAEngines. I would love to meet someone with a 392 Manual and a tune and settle this in a friendly way. We can even switch cars. Im sure we can all be friends, we all have Hemi's of course.
Talk is Talk everyone agrees. The DA in Jersey right now is -800 today and on average so, this car should run in the low 12's im getting from some of you?
There is really nothing to settle. This is nothing more than a case of you being unaware that the M6 392 consistently runs 0.5 seconds slower than an A5 392. Yes a bone stock A5 392 will generally run 12s all day regardless of the weather. In poor DA expect 12.8x and in great DA expect 12.3x. Most times fall somewhere in between - like you experienced. And Litos is correct - in negative DA your times should have been better than 12.5x, which indicates you have some room for improvement in the launch technique.
The M6 is a PITA to launch properly - either it bogs or blows off the tires along with major wheel hop. A perfect launch means slipping the clutch at 4500 RPM to get the car moving without bog or wheel hop. Even then it will lag behind the A5 about 2 tenths to 60'. And every time the M6 is shifted it loses a tenth when zero power is applied to the rear wheels when the clutch is depressed. All things considered, the M6 is typically a low 13 second car, with high 12s being a hero pass. A tuned M6 with all the usual bolt-ons and DRs and a willingness to bust the halfshafts will eke out a 12.4x pass, which is about what a bone stock A5 will do.
M6 owners know all of this - now you do too. We selected that tranny option for the fun factor on the street and the nostalgia of rowing your own gears in one of the last true muscle cars. If I wanted a drag strip queen I would have bought an A5 - it is undeniably the far quicker car in a straight line and also generates much less stress on the drivetrain.