Sharkgray

Made it out to the track last night. Was able to make 3 passes. All within 30 mins. Car has the new AFE cai and my car was the one they used for the Diablo tune. Car made 590HP and 622TQ. Went on stock tires and had them at 28psi. I did some research on how to launch these and went with the best info I could and it worked. I will upload the PDR video later as it shows I hit 3rd gear ( about 70 ish mph in the burnout box ) lol
Anyhow, I would have the car in sport, traction off, manual mode for the burnout. Switch gears 1-2-3 and then ride 3rd out for a few feet. Stop Switch to Drive, Switch to track mode. Hit the TC button twice where it gives you the options (wet, dry, sport 1, sport 2 and race) I selected sport 1. Went to the line and when the lights went down I just floored it off the start. Stock non Z07 Michelin SS pulled a 1.64, 1.63, and a 1.61. Not bad. Not bad ET either, but I feel I should trap higher. That 4-5 shift hurts the car. 10.77, 10.78, 10.79. Pulled consistent 102mph in the 1/8 but my highest trap speed was only 125.29. Happy with the ET, non sure if I need DR. But gotta get that MPH up. Here is the slips. Run 1 6:31pm....run 2 6:47pm.....run3 7:02pm. Happy with that, I headed back for the 45min drive home. Oh, DA was about +1000-1100 PBIR Track

JoesC5

What does "Stock non Z06 Michelin SS" mean?

What I read in your post is that you had very good 60' times that gave you respectable 1/4 mile times, but not hero runs. I think the intake and the tune was a waste of money, IMHO, as indicated by your poor traps.

Snorman

From you description, it sounds like you had TC on.
S.

Sharkgray

Sorry meant to say non Z07 cup tires just the regular stock Z06 Michelin super sports that come on the car. Really wasn't looking for hero runs, Had +1000 da not negative DA, Didn't cool the car down for hours and put a bag of ice on the blower. A 1.61 60ft time I thought was awesome and 102mph in the 1/8 as well. But yes I think my 1/4 mile mph was low. Hero runs are in really cold weather with negative DA and the car sitting for hours. Was just looking to baseline. 3 runs in 30 minutes and was out. Did you happen to baseline your Z06 joesc5? The tune was free and it didn't pick up peak hp and tq. But I wouldn't imagine I would go faster with a stock intake and 40 less hp. But I could be wrong.

I was in track mode - sport 1, But I wouldn't imagine that would matter shifting 2-3 and 3-4 and 4-5th. IDK

DRLC5

Nice runs. I hope to get over to PBIR or Bradenton later this month or next month when I get some time off work. Looking forward to the vids. These runs seem pretty damn good to me with room to improve once we get some better cooler air. Ohh yea 3rd gear 70mph in burn out box..Nice.

Sharkgray

But you might be right. Maybe it pulls timing I between shifts

Thanks man. Let me know when. I will definitely go with you.

JoesC5

I didn't baseline my Z06. After I had aftermarket heads(higher flowing) installed I had it on the dyno twice to tune it for the change that my heads made. I don't put much in the horsepower reading that a chassis dyno makes. Only a very controlled(per SAE) engine dyno shows the "actual" horsepower the engine makes. I've seen dyno sheets showing a 23rwhp different reading on the same car, same chassis dyno, same day with absolutely no changes made to the C6 Z06 between the two pulls.

How do you know that your car will lose 40 HP using the stock air breather? Your 123-125 MPH traps indicate a much lower horsepower than the 590rwhp your dyno showed. A stock C6 Z06 with around 450rwhp can easily do 123-125 MPH traps with a M6 on much worse tires. Jamie Furman did 128.9(10.981 ET with a 1.772 60')) with his stock C6 Z06 on OE Goodyear runflats back in 2007. Your A8 transmission gearing with fairly sticky tires(compared to the 2006 Goodyear's on the C6 Z06) is what got you your good ET's.

That's why I commented on your use of the aftermarket breather and tune. I don't see that you received anything positive from them, maybe even cost you some horsepower.

PS-Were you still in 4th gear or did you shift into 5th gear before you crossed the finish line?

0NORCAL-SS

Taller rear tire will help. The 4 to 5 shift hurts these cars a lot unless your making at least 75 rwhp more whete you go thru traps in a nice spot of 5th gear

On my drag set up guy went from 315 30 18 hoosiers and i put 325 40 18s mh in it after car gained 4 tenths and gained iirc 4mph. Thus is due to the fact he could hold 4th gear thru the traps.

If you decide to do a drag set up I can set you up with a great deal on 18x10.5 drag wheels with mh tires for rear

Fore58

Running 10.77 with only 125 mph trap speed seems impressive to me. But I must agree with a few......something doesn't add up. Just wondering what this car would do with 129/130 traps.

PRE-Z06

Forgive me as I have a hard time believing going to a taller/heavier tire that results in more rotational mass and worse gearing, which which slow acceleration in the first 4 gears even if it requires a shift to 5th...mainly because of how fast the A8 shifts, are you sure the DA and track prep didn't play a part in those results?

0NORCAL-SS

This was from Atco. He 60 footed the same as the 315 30 18 and when in 4th hit down on paddle and ring it out. As soon as yiu hit 5th on the auto at lights it kills power. He went feom 126 to 130.xx trap speed.
11.03 to a 10.6x.

I have 345 35 18 mh drag radials on order. As soon as they come in I'm hitting the track and I'll shoot video also. If you look at pdr vids the drop from 4th to 5th is major and kills the car for 1/4 mile but do mods making 75 to 100 at wheels it will put you sweet spot of 5th. I'm going to be doing a pass in my 335 30 18s and then a,pass on the 345 35 18 and give break down also.

ZoratZ06

I'm not John Force...but something is wrong on the top end...

If you look at Jaime Furmans C6Z 'hero' run of 10.98:

60' = 1.77 (yours 1.61)
330' = 4.76 (yours 4.56)
1/8 = 7.168 (yours 6.949)
1000' = 9.23 (9.00)
1/4 = 10.98 (yours 10.772)
MPH = 128.90 (yours 125.29)

You were faster in every metric (as I'd expect with CAI/TUNE and C7Z), except MPH...and it sounds like your car is NOT a Z07.

I don't know the exact issue, but perhaps NORCAL-SS is correct, something is wrong in the last 100ft where you are losing mph...because 10.77 run at 125mph is pretty fast for that trap speed.

For those of your who watch NHRA events, a top fuel car will drop a cylinder at 900', still run 4 sec flat, BUT, the mph will be down by 50-60mph...in 100'!! Sounds like your car is missing something, maybe it is the 4th to 5th gear change...pure speculation on my part...

0NORCAL-SS

Next time he goes to track for a test as soon as car hits 4th gear hit the down shift on paddle and it will lock it in 4th and just ride it out until the end of the traps.

This has been working great in a 28 inch tall tire for the autos which I've seen feom customers feedback on my drag set up.

If you look at the guy who just posted his run in Sacramento I commented on same thing the 5th mph hits,a,wall

0NORCAL-SS

Perfect example

5th drops mph also you will see and then converter locks rpm drops more

http://api.viglink.com/api/click?for...=You%20%20Tube

Snorman

You should be comparing other C7 Z06 runs, not C6 Z06 runs. The C6 Z06 has nothing to do with this thread, nor should it be used as a comparison when looking at 1/8 and 1/4 trap speeds.
FWIW...1/8 miles speeds for C7 Z06 A8 cars seem very strong relative to their 1320' trap speeds.
S.

DRLC5

Sharkgray do you have the PDR Video?

ZoratZ06

While I generally agree with your statement, it doesn't necessarily change the fact that 123 mph to 125 mph trap speed is slow for a 10.77 to 10.79 run. We don't have a 'fast list' yet for the C7Z so I can't easily access that data...All I know is that most of the guys running 'good' ET's are doing it in the high 120's (128-129) and then of course the 10.41, 10.42 and 10.508 we've seen recently, ALL above 130 mph, best so far is 134. NOTE: 10.79 at 123mph = wow to me!

I'd be happy to look at any other C7Z times in the 10.70 to 10.80 range to have a more apples to apples comparison, but I have a feeling their trap speeds will be 2-4mph higher. Just a guess though and I could be wrong. Please provide


10.92 at 126.8 mph
10.87 at 125.9 mph
10.89 at 126.62 mph

says DA +700 to 1400. A8 stock.

AND, she didn't have a CAI/TUNE...I'd say running 10.77 at 125 is off pace considering the extra HP...I think there's is more in that car...Of course track conditions, experience all play a factor.

I didn't spend much time looking...there might be more vids out there.

0NORCAL-SS

are you sure the mph readers at track are right?

1QUICK Z

What octane are you running? Any Ethanol in the blend? My car was getting stuck in the "low octane table" at the end of last year. Try a can of Torco or a little unleaded race fuel. I'd be willing to bet this is your issue.

PRE-Z06

OP curious if there was a headwind?