vette-oholic

has there been any proof on here that a z51 will achieve a better ET than a non-z51? Of course stock for stock (tiress too)

A better question may be ... who has the best time? z51 or non??

I know there are threads on this, but couldnt find it...

CYA-Vett

Oh man, this oughtta be good.....

No comment.......yet......

JELSIS

With the A6 auto having the same gear ratio's with Z51 or without, I would have to say without Z51 due to weight.

Bone stock
06C6FVR, Z51 ....12.23 @ 115.58 06
DrRichie, Z51 .... 12.42 @ 113.9
LS1LT1, Auto ..... 12.48 @112.11 06
David K, Z51 .......12.49 @116
Jschindler, Z51 .... 12.49 @ 114.9
Nine Ball, Z51 ..... 12.54 @ 113.24 (fan/stat mod)
Orange C6, Z51/auto .... 12.56 @ 112
Zippin Zee, Z51 .... 12.65 @ 111.65
Jelsis, Z51/Auto..... 12.70 @112.43 06
Demented, Z51/auto ...... 12.71 @ 111
Shooter 49, Auto/3:15 .... 12.74 @108.67
Jchazr, Z51 ...... 12.79 @112.17
Tommy D, Auto/3:15 .... 12.83 @109.44
Ginny C6, Auto/F55 .... 12.97 @ 108
Tampa Vet, Auto/3:15 .... 12.98 @108
C64ME, Z51 ........12.99 @111.7
Soldsyclone, Auto …….13.05 @ 108.7706
TMyers, Auto ...... 13.20 @ 108.91 06
C6 Matt, Z51 ........... 13.25 @110.6
JDWK, Z51 ………. 13.25 @108.4
Rich28, Z51/auto ...... 13.62 @ 106.18

MKS

it all depends wether or not the none z51 is an F55

vette-oholic

Is LS1LT1's c6 a z51 or not?

catbert

I've had both kinds of tires on my Z51 - trust me, the Supercars are much stickier, and should be noticeably better in the quarter the the GS.

dennis50nj

its not

OregonC6

IMO with and without Z51 are so close that the greatest variable is the driver. My opinion is that it's too close to call.

I am disappointed in GM for not adding some hp to the Z51 for '07. I personally think the Z51 should have 25 to 35 more hp than the base car. This would not, IMO, cut into Z06 sales since that model would still be way above in performance.

However, a ten percent of so bump in Z51 hp would put all this discussion to rest once and for all since the car would have to be clearly faster than the base model.

just my opinions. Z51 is a wonderful option, wish I had been smart enough to order it, it's ordered by really sharp people who really know vettes...( but it proly doesnt' make the C6 much faster in a straight line )

yell03

My 2005 C6 A4 is not a Z51, but I was able to order the optional 3.15 rear that the automatic Z51s came with.

I think the non-Z51 2006 automatics (or 2005 automatics with the 3.15 option) are probably faster in a straight line due to the softer base suspension transfering weight front to rear better, which would not be as good for handling.

As far as manual trannies, the Z51 has a better geared tranny and would most likely be quicker in the 1/4.

It is so close the race would still go to the better driver.

Howard

CYA-Vett

You live in Bucks County??...Come out the the track rental on Friday, it's a blast...

'06 Quicksilver Z06

Not, but its an A6 automatic.

The Z51 option in the automatics offers the same transmission gearings as in the non Z51 cars so no advantage in the automatics.

If you look at the bone stock manuals, the Z51s are ruling the roost.

The quickest bone stock C6 on this board is an MN6 Z51 running 12.2 @ 115mph. The quickest automatic, Z51 or non Z51 ran the 12.4 @ 112. Five out of the top six on that list are manual Z51s.

9 out of the top 10 are Z51s of one kind or another. In the '05s the Z51 option included 3.15 gears which could be had w/o the Z51 option as well. Lots of variables as these times come from all over and some are run on better prepared tracks than others and under better weather conditions than others.

Are the Z51s stock for stock quicker? The numbers indicate that they are.

yell03

CYA -

I'd love to, but I have to work.

My fun yesterday was taking my Z all the way up 611 to River Road (32 South) and cruising all the way back to 263.

It was wet, but a fun time. Those twisty roads are what driving a sports car is all about.

Howard

jschindler

I have had both cars, and have had both to the track. I turned a 12.49 at 114.9 in the Z51 coupe, and 12.57 at 113.1 in a F55 convertible. On one hand, the F55 car had B&B Bullets on it, the Z51 bone stock. But I also only made two good runs in the F55 car. If you compare runs that had virtually identical 60' times, the 1/4 mile times were almost identical as well.

Also, I have "experience" running my F55 car against three different Z51's head to head. The only one that can claim to have outrun me I ran even with to about 110-115, then he started to pull me. He was a coupe, mine a vert. He also had an aftermarket exhaust.

This got argued to death in a thread a few months ago. Any difference is so small that's it's hardly worth talking about.

CYA-Vett

The tires make the difference.
The supercar tires on teh Z51 are far superior for traction.
If you plan on running slicks at the track, it's a dead heat.

But what about Torque Management

'06 Quicksilver Z06

What about the gearing in the case of the manuals?

SpinMonster

Anyone dismissing the gearing and saying its all tires is trying to convince himself that their purchase of a base vette was OK. I lose no sleep at night on dropping the extra 1600. Auto is a different story.

'06 Quicksilver Z06

I tend to agree. I have a hard time believing that gearing aproaching 3.90 would not count for some improvement in ET over 3.42s in the same car all else equal .

CYA-Vett

You guys forget that a non Z51 equipped mn6 can run through the traps in 3rd gear. That's one less shift, enough time to make up for the additional acceleration.
I still say its a drivers race and the difference is minimal.
I will be at a track rental on Friday, hopefully a Z51 will show up, we'll swap cars and see what happens. Should be fun....
Dave

glennhl

For a stock car I'd go with the non-Z51 just for this reason. I had an 01 Z28 that required me to shift right before the lights. I would run 111 bumping the rev limiter in 3rd and not shifting, I'd run 110 if I shifted to 4th. Then I bumped up the rev limiter from 6600 to 6950 and ran 113.75 in third gear and my quickest et of 12.72.

glennhl

Depends how deep you get into 4th. If you only use 4th gear from 111 to 113 like in my case it's a losing proposition. Now if you go with 3.90's or 4.10's, then you are absolutely correct, the 3.90 or 4.10 car will win every time.