BooSSted

Interesting, so the talk now is tour mode for weight transfer or sport/track for faster gear shifts? All the other advise seems to line up except for those two.

Privateeye007

Will the throttle response addon unit make a difference?

Bob U

I think the new DCS controller should help with better weight transfer and hooking up in Race Mode while getting the benefits of faster throttle response, quicker shifts and higher shift rpms.

0Terry@BMS

Tuning and octane are the real difference makers. An intake and pulley doesn't hurt either.

BEZ06

You mean DSC.

This week they are coming out a new tune for the shocks that they say will help with launch:

They'll be releasing the new tune and Software User Manual this week. Should be available on their website:

http://www.dscsport.com

Also, the Wi-Fi feature should be opened up. I think the Software Manual will have the security info required to activate it in order to download the new tune to your controller without need for the USB cable.

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Darkvet

So just out of curiousity, since I'll be picking my Z up in march, doesn't the manual paddle **** allow you to hold gears longer? Or does it just simply slow down the shift points?

BEZ06

I dunno I don't have that "manual paddle ****"!! I have a manual lever in my M7.

Butt....I've instructed in a number of A6 and A8 Vettes at track day events, but I haven't seen an auto transmission at work on a drag strip.

However....I think when you go WOT on a twisty track or a drag strip, if you're in Drive the shifts are going to take place at/near redline of 6500 RPM.

You can't "hold gears longer" when in Manual and using the paddles - the rev limiter will cut power at/just above redline.

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JustOne

Andy,

I'm thinking hard about getting the CAI, but I'm a little worried about dealing with warranty issues with any change. Is the Halltech easy to remove for dealer service and put back to stock?
I have an extended warranty because I plan to do some track days with the car, and if they will warranty it for six years, I'Il let them. I don't want to do anything that would question the warranty, mostly due to the trans. I just replaced the converter in my 6.2 GMC A8 with 11k miles, and one of my friends is having to replace his converter in a new CTS-V
I'll look for trying to put a day together in Feb for going to RPR. We may want to do a bracket race day instead of Fri night due to the crowds.
Where did you get your drag race wheels and tires?

Darkvet

A CAI will not void your warranty unless the failed component proves to be a direct result of the mod.

Darkvet

The A8s are at home on the drag strip. I'm not concerned with the M7. I understand that it hits the rev limiter and will probably shift in to the next gear regardless. I'm just thinking that it may help a few hundred rpms over "drive. "

Thomasmoto

My best 60's have been in Tour mode and coming up against the converter a little. Track temp and air make a huge difference in these cars. I wish we would start a list of 90 degree and higher air temp runs. That would proove to the unbelievers how much of a difference it really makes. And, yes icing the top of the blower helps a bunch as well, but don't be surprised if they fuss at you about dropping water on the track. To really get it cold takes a lot of ice and water, especially if you drive your car there. But don't be too dissapointed in your previous performance it wasn't that bad and you will get better at it and more miles on the car will help as well. And get you some drag radials, they will help you, especially if your track doesn't prep very well. I can hook better on the street than at my local track. They just don't spend the money on the test/grudge nights so it's always interesting. Repro wheels are available now and not too exspensive. I run them on repro 19X12's with Nitto NT05R's in 345-30-19. MT and maybe even Hoosier will 60' a little better, but don't run those on the street. I keep my Nitto's on all the time except when I use my Optima event tires/wheels. They even work well when cold and are safer in the rain. I DD mine.

ACS55

I can literally remove the aftermarket CAI and install The factory unit in 15 minutes without hurrying. It's not "supposed" to be a warranty problem, but if my car had an issue, I would swap the oem unit back on before bringing it to the dealer, just to avoid the arguement.

If if you read the manual, "racing" the car voids the warranty... so I wouldn't mention the track days to them.. lol.

Andy

Pm me about wheels and tires, non vendor answer.

BEZ06

I don't care about the M7 in this discussion either.

However, I don't think you understand how the A8 works in D. When you're in D and got WOT, the car WILL NOT hit the rev limiter!! It will shift at the shift point, which is just slightly below/at the redline.

You CANNOT hit the rev limiter in D!!

If you're in M and go WOT, when the RPMs get to the rev limiter (6600 RPM), the car is going to sit there bouncing off the rev limiter until you lift off the accelerator pedal or upshift.

I think when you're WOT in D the shift will take place so close to redline that there's nothing left but maybe 100 RPM to the rev limiter.

You can tune the rev limiter to a higher RPM, but you'll void your warranty, and probably blow the engine - unless you really build it.

Bottom line - I don't think there's any benefit going into M and driving it to the rev limiter to get an extra 100 RPM before paddle shifting to the next higher gear.

When in D there is a very slight cut in power (I believe it cuts fuel for an instant - Edit: according to HB it's actually ignition that is cut) to facilitate the shift. However, if you're in M and sitting there bumping off the rev limiter you're going to lose more power in the time it takes to react and paddle shift than if you shift it at 6400.

Just MHO!!

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Higgs Boson

it cuts spark to shift.

BEZ06

Gotcha!! Is that what is cut at the rev limit as well?

And how 'bout PTM - when that activates to cut power, is it spark also?

TIA

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Higgs Boson

combination of throttle and spark

Fore58

JustOne.....can you compare your times with others cars running the same day as you? What I mean was there another Z day or something similar in power.

1QUICK Z

What octane were you running? These cars NEED octane! Even on the stock tune

JustOne

Fore58 - There weren't any other Zs running last Friday. There was a 16 C7 Z51 A8 running with us, and his best was a 12.30@116.

1QuickZ - I was just running pump 93.

Fore58

Okay.......I have a bone stock A6 base and ran 11.88@11€ DA 1100 at Bradenton Motorsports Florida. That particular car in comparison should be able to run at 11.90s. Our elevation is at 59ft. 11.00's was eventually fast for that particular day the way it appears. Just remember. .......you have more left at least two tenths.