Achmed

Which do you think will be faster in a straight-line? Will the Z51's added weight be outweighed by its advantageous gearing (comparing auto to auto)?

gthal

Base... say 100ish pounds lighter

Z51... grippier tires and better gearing

My personal bet is the Z51 with gearing and tires is faster in a straight line but that is COMPLETELY speculation. IMO gearing is more important in acceleration than 100 +/- pounds.

DREAMERAK

Until we know the weight of the Z51, It's all guessing. Someone going to the 60th at NCM needs to ask one of the engineers there.

LS1LT1

I think we need to know that actual weight difference to truly determine this one...I think it might be too close to call though.




I don't think it will be quite that much, but maybe?
I'm guessing only 40-50 pounds lighter.




And I would agree if we were talking about a MAJOR gearing difference, but it's not.
That 100 pounds (if it IS actually a full 100 that is) would do more harm than the few extra (or fewer?) teeth on a few of the transmission cogs can overcome in my opinion.

Now, if it were a change from 3.42s to 4.10s in the rear differential along with the Z51 transmission gearing (manuals) then I would agree that the extra 100 pounds would almost 'disappear'.
Same thing in the automatics, the change from 2.56 to 2.73 would not be enough to overcome a 100 pound weight gain (but it could possibly erase a 40-50 pound one).

Big Dan 427

If the strings on the dummies arms are of unequal length can the dummies arms be raised to equal heights?

Achmed

I didnt know the Z51 had grippier tires - are the tires not the same between the two?

Hot Rod Todd

Z51 tires are a special compound that will likely wear faster, but grip better. The gearing difference with the grippier tires should overcome the weight difference. In any case it will likely be close enough that the drivers skill will determine who wins.

gthal

Z51 has a racing compound PSS versus the regular compound PSS on the non-Z51 car. Confusing as they are both PSS tires.

gthal

Agreed... it would be measured by very small differences either way.

JoesC5

Z51 will be two car lengths ahead at 60 MPH and 3 car lengths ahead in the traps.

sam90lx

Now Joe...I gotta ask, where did you get that info?

Bill17601

Does each car have a full tank of gas? Do the drivers weigh the same? Game on...

Achmed

I'm planning on only filling up to the half-way mark whenever I put gas in, and will go on a diet before I get one to drop 30 lbs or so.

ParisTNDude

Are the wheel and tires sizes the same on current C6 Z51 and base cars? I'm not sure.

I doubt the gearing makes a great deal of difference as others have stated so, for me, give me the weight advantage. In our 1/4 mile Challenge, it doesn't appear the Z51s have an advantage. In that thread, the GS bone stock times are considerable slower then the best non GS cars?????

gthal

I respectively disagree with gearing not making a meaningful difference. The E92 M3 is much faster acceleration wise then it should be (considering its power and weight) largely due to gearing. Is gearing the be all and end all... absolutely not... but it is relevant to torque to the wheels and usable power.

HamsHall

100lbs is still 100lbs. base is faster then GS, lighter is better, the base is the overachiever

george vee

MY C7 Torch Red Z51 will be faster because red corvettes are faster.... LOL

msm859

Maybe it will depend on the drivers skill - and weight. + 50 lbs Z51 or - 50 lbs lighter driver?

Hemi Dave

I am betting the Z51 will have the edge.......

JerriVette

The e differential, gearing and the optional MRC should help to make the z51 a tick faster..

FWiw