Actually not. What 3 Z06ZR1 is trying to tell folks (at least those that are objective) is that the A8 has advantages in certain areas of the acceleration curve. It also has the advantage of shifting a bit quicker.

However the A8 has the disadvantage of having a higher percentage of drive train loss.

The A8 is quicker in the 1/4 due to the gearing advantage in first which gets it off the line.

If you look at the gearing you will find the A8's only clear advantage is from a standstill. Or said another way there are periods during the acceleration curve where the A8 has less torque multiplication than a M7. For example when the A8 shifts to 2nd at 45mph (redline) the M7 is still in first. From 45 mph until about 68 mph the M7 has the gearing advantage. AND this advantage is greater because of less drive train loss for the M7.

Also the A8 makes 3 shifts from 0-125 mph while the M7 only needs two. Yes the A8 shifts quicker but it shifts more often which takes time.
So from a roll in the real world (at the speeds a roll on is likely to happen) the A8 advantage may not be what many folk think it is. And above 125mph the M7 holds the advantage until about 150mph.
Then its A8 and back and forth until max speed.

 

Take both a8 and m7 to track same day. Trap speed will tell the story.

 

Trap speed will be close to the same at 125-128.
They both shift at 125ish close to 1/4 mile mark.

The difference is about .2-.3ish ET. Advantage A8.

The track will only show the outcome from a standing start where an A8 has a significant torque advantage from 0-45 mph with its stomp pulling 1st gear. The A8's gearing lowers its 1/4 mile ET but the traps of both cars is practically the same.

 

Thi is why I'm doing my event. Same day and same track both a8s and 7 speeds to see how they match up

 

You just don't get it! The part about the gearing tells the racing story.
The low 10.99 first of the A8 allows better time and traction from a dead start. The A8 actually puts down hp less once moving.



The 10.99 over all gear means the engine has really 11 turns to move the car the same distance as the stick with 7.83 engine turns to move the car the
same distance. Thus why standing 1/4 mile A8 wins stock to stock. You should know the effect of faster 60ft faster times and trap
speed.
That's why the higher trap from the better start. The A8 loses that adavantage over the M7 in a roll start. Equal rolling start from 40-50 and up the manual should be faster.

Lesson for the day you still have a ton to learn about racing.

 

lesson is I offered you 1k plus gas money and you pussed out to come down here.

Instead of saying how fast yiur m7 is and writing math on paper why not actually take the car to the track and run it and see what it does. Maybe then you can stop trying your ******** math numbers to actually make yourself feel better you wouldn't beat me lol

 

This is funny. He just admitted to you stock vs. stock the A8 was faster at the drag strip.

On the street above 50 mph? Maybe, maybe not.

 

Someone who understands and gets it! How refreshing!
Nice work on your post!

 

Man you pick up stuff real quick! Others not so much!

 

I normally don't agree with you, but you did say the A8 will be faster from a standstill (a few times actually). Here's the one thing to consider about a roll race. With the A8 you don't lose boost when you shift because you're not letting off, but the same can't be said for the M7. If you race from 50, both of you would start in 2nd I'm guessing, the question is, who has the advantage then?

 

Glad your agreeing still a lot to learn at 15 still waiting to drive.
Although we all never stop learning.

Not really worried about lost or losing any boost, a manual shift with a good driver is really lighting quick esp with a shifter other than stock like the MGW I have.
Your shift is really very close to no lift Engine Rpm 's stay up
No worries about lost boost you would never look a boost gauge during this time anyway that's for sure. Nor do you feel a power loss.

Funny thing about boost gauges I never look at them.
In fact 2008 C6 I installed myself a A&A kit removed it sold the car as stock bought a 2008 Z06 did another kit. Still have that car.
I know it has 8 psi but never installed a boost nor needed a boost gauge.

 

Also tb closes on 7 speed cars on shifts. Here's a good little video

Here's a auto vett vs srt8 hellcat and viper

Now m7 vett vs same hellcat and you can see even off roll auto pulls better.

 

The Hellcats are 2 different cars. The one that raced the yellow Z07 (M7) was a manual and the Hellcat that raced the A8 stage 1 Z was an auto.


Here's the description from the A8 video you linked.



Here's the description from the M7 Z07 race you linked.

 

Cool I have a race set up with the halltech m7 I worked on when I break in my car. Since 1000 bucks plus paying gas money you won't show.

 

Why can't we all just get along...

 

Why does it really matter which one is a little faster I just enjoy driving the M7 more than an auto. They are both way faster than you could ever go on the road for pleasure anyway. To each their own that is why they make two options

 

Maybe look closer and see the severe wheel spin the yellow Z06 is doing then think again. He needed touring mode and traction control on. That M7 looked faster than the A8
The hellcat is much slower unless the Z06 has a bad driver or wheel spin

 

There is that fact too! But we pick bones here!

 

I was sure you posted many times that race already happened.
With your buddy's cars two halltech cars. Now it is one and it's set up with your car you don't have yet and it's one you worked on!

 

From a 50 mph take off the A8 would have the theoretical advantage because the M7 can’t go back to first. I say theoretical because it’s hard to quantify the momentum the M7 would gain from a no lift down shift to 2nd vs the A8 automatic down shift to 2nd. (Ok I could do it but my head already hurts)

Regardless the A8's advantage is short lived because the A8 shifts to 3rd at 71 mph while the M7 can hold second until 95 mph.

So the A8 pulls off from 50 until it shifts at 71 mph, where it losses time (however long it takes to shift), then it losses hp (gearing, 3rd vs 2nd) and it constantly losses hp due to drive train loss. So the M7 should close, some, if not all of the gap.

At 95 mph when the M7 shifts to 3rd the advantage may go back to the A8 until 102 mph (due to time for the M7 to shift and gearing). But there may not be time for it to show because of power train loss and the short 7 mph time span the advantage is applied).

At 102 mph the A8 losses time from the 3-4 shift. From 102 mph all the way to 126 mph the M7 has 2 advantages. Gearing, and less drive train loss. If there is any gap at this point the M7 will close it and likely begin to pull.

At 126 when they both shift, the A8 will close for a split second due to the quicker shift vs the M7. However after the shift is completed the M7 continues the hp advantage it has held (gearing AND drivetrain loss) since 102 mph all the way to 155 mph when it shifts into an acceleration killing 5th. The A8 will arrest the pull and begin closing the gap until its forced to shift at 170 mph. Its doubtful the A8 will make up all of the gap the M7 has been creating since 102ish mph in the next 15 mph. I suppose it could but some of its gearing advantage from 155-170 is negated by drive train loss.

So as you can see the A8 advantage aint always what it’s cracked up to be.