Took my newly B&G tuned 392 to the track

[Toxic11]

Originally Posted by Heminator

Anyone running DRs on a 392 M6 should have DSS 1400 axles and a Hop Not kit.

Absolutely concur! Anything else and it's gonna be KABOOM!

[Heminator]

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.

[fastfranky]

Originally Posted by Heminator

Which is why the GT500 has a live rear axle and parts which can withstand a direct mortar hit. And also why the ZL1 (while still a IRS) has a massively upgraded diff and half shafts.

The diff failure surprised me - the SRT is shot peened for 2011+ for extra strength. The busted half-shafts didn't surprise me at all - and are the reason I won't mount DRs on my car. Anyone running DRs on a 392 M6 should have DSS 1400 axles and a Hop Not kit.

I have been trying to understand the part number change 11+ for the 226 Getrag LSD ( example the 3.06 11+ number is 68085306AA) perhaps this being "shot peened" explains it. Where did you get this information and what ohter changes were made to account for the part number change?

[Heminator]

Originally Posted by fastfranky

I have been trying to understand the part number change 11+ for the 226 Getrag LSD ( example the 3.06 11+ number is 68085306AA) perhaps this being "shot peened" explains it. Where did you get this information and what ohter changes were made to account for the part number change?

The shot peen upgrade was mentioned by numerous auto-mags and also SRT engineers when the 392 debuted. I do not know what other changes were made to the diff.

This C&D write-up came straight from an interview with Tom McCarthy SRT Challenger Chief Engineer. The shot-peen upgrade is mentioned.

2011 Dodge Challenger SRT8 392 First Drive: Dodge Challenger Review – Car and Driver