It doesn't matter how much engine horsepower or torque you have, only what you can put to the ground at the rear wheels.

A Z06 with 355rwhp vs. your 339rwhp, means he has 16 more rwhp, not to mention he is at least a hundred pounds lighter.

On this forum and the Z06vette forum you see "stock" Z's in the 11's with a decent driver.

Depending on traction issues, and assuming like skilled drivers, the Z wins every time. (I admit I might be a little bias as I have a 02Z, with 451 rwhp)

Steve

 

It takes more than a decent driver to get a stock Z into the 11's. Pretty much, it takes an excellent driver and great track conditions.

At any rate, as previously indicated, the only thing that matters is power to the ground. . .the weight of the cars cannot be considered, unless you also factor in weight of the drivers and amount of fuel in the tank. . .either of which may more than make up for the difference in the weight of the car.

The other factor which is clear. . .if you have an A4 and he has a M6, try getting in his head. After all, even if he is putting down more power, if he misses a shift. . .he's toast!

 

i plan on adding LG motorsports Long tube headers in october...that should make up the difference

 

however just a 'decent' driver is not going to get a z into the 11's, a very very good driver like brent or ranger are going to be able to get a stock z into the high 11's

 

If you're not < 12.37 then I win

BTW I'm in Pensacola until Sunday and might come over to Tally to see a freind... unfortunately my car is in Va beach, but I'll be rockin' my aunt's '98 vert auto, but that's not much of a race now is it.

 

Exactly. Add in the fact that he has better gearing, and you're gonna lose....

 

Gearing is a major factor. With the 3.42's and the MN12 trans in the Z06, it's like 3.90's in a regular 6 speed C5.

Also the weight and the 20 or so extra rwhp he has on you. If he can drive I think you will lose.

Converter and gears will get you there like others have suggested. Headers will help, but ditch those 3.15's first...

 

how about now? Got Supermaxx LT headers installed... 355.02 RWTQ and 342.6 RWTQ now...

 

ttt

 

You'll still get dusted if the Z has a better than average/decent driver in it. If the Z is running DRs it won't even be close. All of what I am going to say is contingent on the Z06 having an experienced/good driver in it. I have seen a very few poorly driven Zs struggle to break 13s. I have seen well driven ones, consistently in the mid to low 12s.

If you have ever witnessed one make a 1/4 mile pass or a few 1/4 mile passes, with a good driver, you'll know what I mean. It is something to see. Mid to low 12s seem effortless.

First thing you have to understand is, its nothing for a stock Z06 to run 12.5 or better with a decent driver in it. With practice a Z06 owner has a better than good chance of hitting that mark without ever doing anything to the car. The best Z drivers get into the very low 12s, 12.4 and better, and even the high 11s outright bone stock.

3.15s and the stock converter???? Against a decent driven Z06? No chance. Even with the head up horsepower you will not accelerate nearly as fast as that Z will due to your gearing vs his. Sure, the HP is a match, but the gearing is a definite mismatch. The gearing plays a big role in the car's ability to accelerate. Its not just the Z's horsepower, its the MN12 transmission gearing and the 3.42s which some say put it at 3.90 gearing, though I have also heard 3.73 gearing is the equivalent. Never took the time to calculate it out, but suffice it to say, the 3.15s and your A4 aren't close.

With a good dtriver, that Z06 is going to take off like a bat out of hell, and simply widen the gap, while you will never catch him with those 3.15s which in actuality, are just a slight step up from 2.73s, and that stock converter. Some say the 3.15s offer about .3 advantage over the 2.73s. Not nearly enough to go after a Z if your HP matches his. You go at a Z, you better come correct.

What tires are you running?
If you're running runflats and he is running even his stock F1 Supercars then that makes it even more in his favor.

Your stock converter is not going to put all that new found torque you have now to the wheels as effeciently as a good aftermarket high stall will.

If you had lower gears say 3.42s or better yet, 3.73s, and a decent stall converter, 3000 or better and good tires, ET streets or DRs, you could give a lot of Zs a hard time, even with good drivers in them. Anything less than that and even though you're matching him horsepower wise, it'll take more than that to bring consistent results against a car like a Z06.