WS6TransAm01

iTrader: (13)

RonZ.......................Me
'04 Z06....................'01 Trans Am
3200lbs....................3300lbs
CARTEK 4X H/C..........CARTEK 4X H/C
4.11s + 26" tire..........4.56 28" tire
T56.........................T56

10.56.......................10.41
130.5.......................131.48


Whats your point A?

I don't unnecessarily agree with you about Vettes MPH better then F-Bodies. I think I know what brought on this thread. A major factor might be that the Vettes you speak off actually race... more then once a year.

FASTFATBOY

iTrader: (23)

Same day? Same driver? Same track? Otherwise..........


Also the original poster...are you observing these times on the same day at the same track? If the Vette is a six speed and the F body is an auto there is your answer for sure.

David

WS6TransAm01

iTrader: (13)

same track, different day, same air, and I "tought" Rob how to shift so I can vouch for his excelent driving ability. I may be shifting a little faster then him, but we are close enough I suppose. Im sure we will line up next to each other in the fall. And A. can have his definative proof.

PS, his best is 10.55 not .56

You can never have a test for this under exact controll conditions. Even same day same track, as you said, one driver may be more skilled then another. Even if its the same driver, he might be more adept at driving one car or another. For example, I am better in F-Bodies; I can jump into an F-Body and if I push myself can beat the owners best in about 3 passes almost every time I have tried, but in a Vette, it takes me a lot more time to figure out the launch for istance. Also, the prep may change from the time one car went down to 10 min later when the next car went down track even with the same driver.

You cant produce the results in Labratory like conditiond, so we must assume some degree of error, and look at cars that are "close enough" in power, weight, and driver skill.

LS1LT1

iTrader: (16)

It's likely not a very big difference at all though, especially comparing same year cars (ie: a '99 C5 to a '99 F-body). The biggest difference was likely that the C5 never had EGR and the F-bodies did up until the '01 model year.

LS1LT1

iTrader: (16)

Let Brent take a stab at RobZ's car, I bet he would close that gap right quick.

He's mostly talking automatics here, not the 'way too many variables involved' manuals which when compared to the autos will obviously trap higher, all else being equal.




You're right, you gotta be out there and running the car, sometimes the car just gets faster on it's own for no concrete reason....but I'd bet that Anonymous has over 25-30 passes on his car in all sorts of weather on 4 or 5 different track visits since last November so he is out there.
Though some were bracket or Index events where he wasn't necessarily going 'all out' on every pass as well.

WS6TransAm01

iTrader: (13)

Marc I know what you mean.

I will agree that aside for a few and far between examples like myself and Rob I would have to say that the original thesis that Vette's MPH more then F-Bodies is correct. That is until the Vettes run into drivetrain issues that basically make them into F-bodies [ie; swap out the IRS for a Solid Rear]

I would like to know the answer as well, but unfortunately I don't think anyone has one exact undeniable answer that can not be disputed. Everyone seems to be simply grasping at straws and shooting in the dark with answers if you know what I mean.

Unless we have an experiment with exacting controls we will never get an answer and will only have intuition and a theory. And there will be as many theories as members on this board. Some will agree with A, some will agree for different reasons, some will not agree at all. I do not think there will ever be an answer.

We should call the Discovery Channel and the MythBusters!

This is what we need; same day, same track, same driver
2002 C5 Coup and a 2002 F-Body
Same block, same intake, same cam, same heads, same exhaust down to tube diameter, marterial, and coupling technique, same rims, same tires front and back, same air filters, same induction system, and making the same HP on the dyno with.

Both cars will have to have the same exact tire temperature after the burnout, stage the same exact distance between the beams, leave at the same exact RPM, racing in the same lane, at the same time.

Obviously this is can not happen, so there will never be a distinct answer to the question of why, or even if the original theory is correct. There is a lot of evidence to support the original theory, but there is some evidence to support on the contrary to it, and as long there is any evidence to the contrary, you can not as "Why are Corvettes faster...?" You must first as "Are they truly faster with all things being equal?"

Anonymous

WS6TransAm01 like I said above, I don't like to use stick cars for comparison because the driver makes such a big difference. But we all know that stick cars out MPH automatics anyway. Knowing both cars, I don't think your car and RobZ's car are a good example. Plus you have an unusually fast H&C F-body which I would consider the exception and not the norm.
You know my original post is 99% accurate.
One has to look at everybody's performance and not just their own cars.

Look at Brooklyn Mark's car (w/408). It is a Beast. It is one of the best launching F-bodies I have seen in a long time. The thing runs 10.20's!

But what is his best MPH? 129.

Heck, I can name many Vettes that go over 130 with only H&C.
Even from the same shop! But guess what...He is going 10.20's and no one else is? Where is all of this MPH coming from?

How about Coach? His MPH isn't high either but he run's like a mad dog in the 10.20's almost in the teens!

Can anyone answer my original question?

Anonymous

You could have something there?

Anonymous

This is true and valid. Your buddy was right and must be on the ball.
Most people don't know that.

The problem is that many times the opposite is true where a person gets their best ET and MPH on the same pass. (Usually from a new combination or better air)

Your quote, is where a car is actually 60'ing better, therefore getting a better ET, but since it is the same engine and not making any additional power it has less time to accelerate the car.

Basically, it is the opposite of a car spinning it's wheels off the line, then getting some obscure high MPH. (usually a personal best)

It works both ways.

Thanks for the input, at least we are thinking here, but that is not the answer to my question.

CamTom12

iTrader: (1)

Noyzee told me that. I always noticed it after I got a good number of passes in on a particular set-up

LS1LT1

iTrader: (16)

That's me...in all of my cars I almost always hit my new best trap speed on the very same pass as hitting my new best ET as well, albeit I'm only running low 12s to high 11s at 113-115mph.

That_guy

iTrader: (1)

weight and aerodynamics + they have a better top end to begin with.

germeezy1

I have a C5 that traps 126 ish on the spray but the fastest time its ran has been 11.1...I have always been mad because alot of the F-bodies that trap what mine does run 10's!

Noyzee

iTrader: (37)

my vett went 12.0 @128. lol
she spins a bit

Pro Stock John

iTrader: (34)

C5's are a bit lighter, I've seen stock C5 A4 cars go 13.0-1@108-111 when a Camaro SS A4 would go 13.1-3@106-108... My reccollection is that C5's can be around 3200, and F-Bodies are routinely 3400 and over. I think Z06's like mine are 3050 or something?

Anonymous

It is just unbelievable how much faster a Vette MPH's than an F-body of equal weight and power????

Spankyspank

Aerodynamics, why is that so unbeliveable?

LS1LT1

iTrader: (16)

Agreed, it's not at all unbelievable if you're talking about only a 1-2mph difference...but what if you saw say, a 6-7mph difference (granted, the gap usually isn't that much but there are cases showing this) between two otherwise similarly modified/weighted cars, the only difference being one is a C5 and the other a late model 4th gen F-body.
Certainly aerodynamics alone can't account for that much, can it?

tektrans

iTrader: (23)

To me the answer is simple.
Cartek is just working on WAY too many vettes and not nearly enough F bodies as of late.

Anonymous

I agree!