yell03

Just for fun I poked around this morning and found as many times as possible for each bone stock variation, A6, A8, and M7.
I did not go in to non-Z51 or Z51, coupe or vert, 1lt or 2lt, etc.

I found 4 A8s, 5 A6s, and 3 M7s.

The averages came out to:
M7 - 12.06@117.57
A6 - 11.63@119.46
A8 - 11.72@120.55-120.80 (2 of the runs did not give the 120.x or 121.x so I assumed the x was a 0 but then did it as a 0.5 just in case)

The M7s are just as fast, but it is much harder to get a manual down the track on street tires. I only got my 600rwhp Shelby to a 12.0@124 on street tires.

The A8s (specifically the non-Z51) are geared amazing for the 1/4 mile. I believe the non-Z51 only shifts 3 times and crosses in 4th where the Z51 needs 4 shifts. They stay in the meaty part of the powerband after each fast shift and this shows in higher trap speeds.

The A6 is older technology, but it is also geared well for the 1/4, crossing in either configuration with 2 shifts. They do not shift as quickly as the A8 and they also drop further out of the powerband after each shift, but only needing 2 shifts helps.

I understand this often leads to a pissing match, A8 Vs A6 or Z51 vs non-Z51, but it shows they are all fast and each match up would be a drivers race.

Here are the breakdowns:

A8
11.37@122.91
11.83@120.x
11.84@121.x
11.85@118.3

A6
11.44@120.84
11.49@118.96
11.61@120.17
11.74@119.05
11.88@118.31

M7
11.95@119.62
12.07@116.79
12.16@116.31

My personal car is a 2014 1lt A6 Convertible non-Z51 non-Npp, with Flowmaster Axlebacks.

z edge

WoW those are some damn good times

Tulsaeasyrider

Interesting! I'm a little surprised, but pleasantly so. Glad to see the out-dated A6 do so well, especially since my NRB ZF1 NPP C7 is running the A6.

BIG Dave

The difference is you need a good driver to get fast M7 times. My M7 times would be embarrassingly slow!

yell03

I never thought the C7s would be this fast.

I think when all is said and done the A8 will prove the fastest in the non-Z51 configuration.


Manuals are much harder to launch on a street tire, that is what is killing the et. Plus, each shift loses even more time than the old A6, not even close to the A8.

C2367

That is one of the reasons I ordered a none Z51, I think the None would be the Quickest for the 1/4 with the A8 by maybe close to a 10th.

youcancallmeray

That's different than most posters who say they got the Non-Z51 because they weren't going to track their car.
You're getting the non-Z51 because you will be raving on a track.

yell03

I would think so.
I also think you might see a A6 run a 11.3, but not at the same mph as the A8.

I think from a roll the A8 would be the hot ticket keeping the engine in its powerband, the A6 has a couple of flat spots.

yell03

For the 1/4 mile the non-Z51 might have an advantage, not for a road course.

vettman96

I think it would depend on the driver. I can see where many would not be able to drive up to the potential of the vehicle on a twisty course, 1/4 mile, I'd agree.

b4i4getit

When I see comparisons like this it is not too relevant since there are different drivers producing those times. This is especially important since you are talking fractions of a second. If you can find one expert driver that can do a test with all 3 transmissions those numbers would be interesting.

Fore58

The M7's are going 11.70's with drag radials and 1.7 60' times

oyealiz

My c7 is an m7. If I were going to drag race her, I'd have an auto. More consistency and less room for driver error.

Fore58

I actually believe that the A8 has a much more tuning program from GM.......something we can not get with our A6 unless we retune it. But I will agree....the ET times is the big ticket. The A8 should be faster but the 2 cars are so close in the 1/4 mile.....one mistake and you lose the race.

C2367

Yes I am not going to track the car, just run the 1/4 once and a while. Been running 1/4 mile for many hundreds of runs. I think I well see what it well do soon, if I get in the 11's I well be glad. Just don't know yet if my 18x9.5 zo6 style wheels with Drag Mickys well fit, they fit my C6.

Fore58

Sir, you really don't need an expert for the A8/A6. What you see on the C7 Fast List is pretty much it.....they are drag racers which also includes me. However, the M7 could be a different story against the auto's with a so-called expert driver. Just to note, the fastest stock M7 did a 11.95 and that was with a very good driver.

AFVETTE

I made that same decision/statement but for me and other's I mean "road course" not 1/4 events. There is nothing that would prevent a non-X51 from competing at 1/4 events.

In fact it could very well be a great 1/4 car.

yell03

The A6 top guy improved his 11.44 to a 11.372, even better than the top A8s 11.377.

In all fairness, he is a top driver who runs it every week.

I think M7s with DRs are more representative of what they are really capable of, A8s and A8s don't do all that much better with DRs

VNAMVET

I too, have the outdated A6 in my C7 Z-51. 11.61 @120.17 is all I can achieve.....so far...

Vetteman Jack

Regardless of the transmission type, those times are very good for a stock car.