thee Dragon

Not for nothing but . . . you're at about 70-80 rear-wheel-ponies LESS than a stock ZO6. PLUS your LS3 weighs a couple of hundred pounds MORE than a ZO6. Factoring in power and weight . . . your car is at a 90-100 hp disadvantage to a C6 ZO6

So your experience for the comparison of a C6 ZO6 against a relatively "slow" 60-hp-weaker-than-LP640 Murcielago is moot.

dietrich

There was just a airfield event in England where they have Z06 and LP640 Roadster from standing start to around 3/4 mile. Results were

Murcielago LP640 Roadster - 24.03 s
C6 Z06 - 24.64 s
Murcielago - 24.92 s

Terminal speed on LP640 Roadster was about 8 mph more than Z06 (I am not sure about normal Murcielago mph speed).

AHTTG

You're right about the disadvantage of my LS3 vs. the Z06, especially on higher speed runs. I'm just telling you guys my first hand experience.

The thing is, a 580hp supercar is gonna be very hard to beat at speed. I think that's more of a match for the Z06, which has a big weight advantage. LP640 is really a level beyond that though. As it should be, remember, these cars cost 300k+

I remember an article from Motortrend where they tested 1/4 mile times for the 580hp Lambo and a C5Z on the same day. The lambo ran a 11.7x and the C5Z a 12.4x.

songman3

That is correct - that was my Z06!!
The Lambo`s best was 172mph/24.03 and mine was 164mph/24.64

The event was to determine the quickest car over a timed 3/4mile - time being the primary consideration then terminal speed.
It was run at Wattisham military airfield near Bury St Edmunds/England -with an Apache helicopter acting as referee

www.fightingtorque.org

A Noble [ tuned to 560bhp] won the event with 173mph/23.49sec -
2nd was a LS2 powered Ultima[500bhp] with 165mph/23.8sec
3rd A DMS tuned 997turbo[600bhp uprated turbos/exhausts/software] with169mph/23.94
4th was the Lambo[640bhp]172mph/24.03sec
5th a Nissan Skyline R34[uprated everything! 600+bhp] with162mph/24.36 sec
6th was a tuned 996 turbo[550bhp uprated turbos/exhausts/software]with 165 mph/24.39sec

My Z06 was 7th equal 164mph/24.64 sec, with another Noble which gave 162mph/24.64sec.

There were in total 91 vehicles entered for this contest
The Z06 did very well! - it left behind notably:-

34 TVRs in various states of tune
3 Nobles
3 Porsche GT3
1 Porsche 996 turbo
2 Vipers[one was supercharged!]
I SL65 AMG twin turbo Merc[660bhp]
1 Shelby GT 500 evolution[600bhp]
1 Audi RS6[tuned500+bhp]
and various other hot Mercs,Audis, BMW `M`s,Holdens,Mazdas,Fiats,Seats,MG, Vauxhalls, and the rest!

The Z06 impressed a whole load of folks - especially the TVR owners - and got big respect all round

However, below is one race I did not win

heavychevy

Is your Z bone stock?

And was this for a magazine, where can we get the info?

JDRacing

Truly impressive, Songman. Thank you for the rundown and congratulations. If your Z06 was bone stock, then it looks like it is only one of two in the top 7 which was (the other being the LP 640).

With all the bench racing and "what ifs" which go on around here, your report stands out as objective, unhyped, reliable data. Thanks again for taking the time to post it.

355Spider

That's exactly as I would have suspected. The Z06 will walk away from a standard Murci. I've done it a few times. The Z06 and Lp640 are probably even to 155-160 and then the gearing on the LP takes over while the Z06 goes into the terminally slow 5th/6th gear.

It's amazing what a tune, headers, f1 filter and an air charger will do for top end acceleration. Here's my cars 0-180 for comparison. I think the air charger and F1 filter make a huge difference at high speed.

C5 Frank

I've run my friends standard Murcielago a few times with my stock Z. I pulled him everytime. But we didnt get up to any serious speeds. I'm not a big Italian exotic car fan when it comes to stright line racing them. They are never as fast as the hype in stock trim IMO! I'm sure a road course is different. The LP640 has to be pretty strong though.

Slow Vette

where's the vid??

thee Dragon

Exactly as Slow Vette, myself and others in this thread predicted

Above 150-160 mph, out of 4th and in slow 5th for the LS7, the ZO6 is at a gearing disadvantage

I am actually SHOCKED that the LP did so well against your ZO6 in this particular comparison given all the variables involved

THAT WAS A ROADSTER A hard-top LP 640 would have performed substantially better at higher speeds given less drag

allegretto

Ah, yeah for > $400K !!!!! (think 5-6X)

And worst of all, you'd still be a member of the ultimate gold chain crowd, Lambo Owners.

ayousef

I agree, I personally know people who killed LP's with stock Z's and Ive also seen a stock 997 turbo, which happens to be owned by my friend, step one car lengh in front of the LP640, and remember that the 997 does not stand a chance against the Z06.

Ive raced a 580 HP porsche 997, and he flew at acceleration but at 270 I passed him. The only car that ever beat me was a modified Z06, a 1000 HP carrera GT and right no one else!! Give it a shot with the LP

Robert@Advanced Dyno

when my car was at 485rwp and 435 tq I would pull on my friends 07 640. I would also slowly pull on a stock z with that set up so I guess I am saying that I think it would be a close race LOL

dietrich

This is why I think this type racing is not best form of measuring cars performance .... first Z06 'killing' LP640 then 997 Turbo beating it. I don't think so. I would more believe actual measured tests like from songman3.

Although I like to use this as opportunity to say I overtake Porsche Carrera GT with my M6 last night on autobahn 6 so must mean I am faster.

meadowz06

Wrong answer. It has AWD. It is faster period! I has over 100hp on the Z06. And it tops out at well over 200mph. No contest.

UTVOL06

I disagree.

The LP640 weighs 3670 lbs, 640Hp/484 TQ =5.73lbs/Hp and 7.58lbs/TQ

Stock Z06= 3132lbs 505..really (512) with baffles open..and 480 TQ= 6.12lbs/HP and 6.53lbs/TQ


So even though the stock Z has a slight disadvantage in weight/Hp is has a much better weight/Torque ratio than the LP640. Which probably explains why the Z06 can beat many LP640s until around 160mph when the HP advantage really takes over.

Ofcourse you can go get an intake and tune and be at 5.7lbs/HP and 6lbs/TQ like me

Notch

A valid comparison of those numbers occurs only after factoring in the car's gearing, transmission losses, and radius of the driving wheels.

UTVOL06

true...the LP640 should have more losses though with an AWD system.

The Z06 has about a 12-13% drivetrain loss.

Notch

The drive train loss is only part of the formula...the effects of gearing is also a very important consideration.

The amount of weight being accelerated by the available power is not a panacea for determining performance. The formula for determining the driving force available at the wheels is Torque x overall gear ratio divided by the rolling radius of the driving wheels. Transmission losses have to be used to arrive at the torque value. Of course the transmission loss of an AWD car has to be offset by the traction advantages the AWD may offer. Another important factor is the effect dynamic weight distribution has on available grip...grip being a key factor in getting the power down.

So an evaluation based solely on the weight of the car divided by the crank horsepower or torque is a process of just scratching the surface.

355Spider

Just as we suspected. The LP640 was actually a hair slower in the QT but faster up top in the latest rag reviews. The Viper was a hair faster overall. They were all so close it could turn out different with different drivers. We need Ranger to drive for C&D. Just the Vette though. Can't wait for the Z07/Stingray. Good time to be a car guy.