FNBADAZ06

I have a client that drives a Porsche 996 Carerra 4 that stopped by the office the other day....the same day I coincidentally drove my Z to work We b.s'd about cars and talked about power to weight ratio's.
He told me of his car's ability to go 180+ with his 6 speed car but wanted to know if the Z06 was THAT much more powerful than his flat boxer 6 cyclinder.....so I decided to give him a little demonstration of what an LS7 could do without doing any tire frying

Using only 5th gear, I drove my car to lunch with him as a passenger....slow acceleration for sure but the car CAN pull that gear if asked. He was quite impressed with that demonstration of low end torque, but the real ringer is when I told him my car reaches a terminal speed of 198+ in 5th.
It then came on like a light bulb, when he realized that I could go from a dead stop to 198+ MPH with ONLY ONE GEAR !!!!

He now has a total appreciation of what displacement and torque can do for you.
He says he's going to ask one of his Porsche Turbo friends to try the same thing....he thinks it's equiped with the Crono overboost option but's it's a PDK car, so the Porsche electronic might not let him do it.

So I then got a silly notion to get some real data by going to Speedworld last night during an NHRA track event


I decided to make a pass using only 5th gear, so I could get some data logging to see what kind of acceleration the car could pull using my gear that also gives me the highest terminal speed....to go with my Porsche demo on Thursday.

Time slip looks like this:

60' 4.1345
330' 10.6382
1/8 ET 15.1960
1/8 MPH 57.04
1000' ET 18.6206
1000' MPH 71.23
1/4 ET 21.4935
1/4 MPH 85.90

C6 Z06 rear gear 3.42 x 5th gear (.74) = 2.53 rear gear ratio
It took me around 15.8 seconds to reach 0 - 60 MPH according to the data logs....took just over 660' to get there.
I got no where near max torque numbers (470 lbs/ft @ 4800 RPM), I'll have to look at the logs to see what my RPM was when I got into the traps.


edit: 2799 RPM thru the traps according to the logs
26 degrees of timing, 183.2 degrees water temp, and 57.2 degrees IAT....PERFECT

Lowest RPM following full clutch lockup.....445 RPM @ 13.048 MPH 2.9 seconds after launch.

567.25 RPM @ 16.77 MPH at the 60' mark.

8 seconds to 30 MPH @ 1002.25 RPM
15.8 seconds to 60 MPH @ 1962.5 RPM
19.6 seconds to 75 MPH @ 2458.5 RPM
21.49 seconds to 85.90 MPH @ 2799 RPM (terminal speed)

My chassis dyno numbers only have readings from roughly 2500 RPM and above but it looks like my stock car made approximately 380 lbs/ft and roughly 200 RWHP at 2750 RPM.


Give my another 2.5 miles (maybe) and I could have hit 198+ MPH.....using only one gear

mistermog

I have to say, the track bit is hilarious

turbo raptor

u started off in 5th gear. the clutch must have stunk

383vett

Your clutch and motor were probably not happy campers. Lots of slippage and major engine lugging. Tough on motors. Your motor would be happier at 7000rpm than at full throttle in 5th gear at 1000 rpm.

diverdan

My favorite demonstration of the torque is to start the car moving from a dead stop by slowly letting the clutch out, never touching the gas pedal, and letting the car drive forward in first gear, still never touching the gas. Add a little speed and you can shift into second, still never touching the gas.

I did this with my C5Z and its even easier with the C6Z.

Most people have never seen a manual car that won't stall doing that and the LS7 never even lugged doing it.

FNBADAZ06

Nope....highest RPM on launch was 1258.5 RPM with gradual drop to full engagement at 445 RPM 2.9 seconds later.

FNBADAZ06

No aggressive clutch work required, as posted above.
After full clutch engagement, the car pulled smoothly (but slowly) during the entire acceleration pull with no lugging. Car reached normal idle RPM (650) in 4.8 seconds at 19 MPH. Ran at 2-3.5 total timing until roughly 30 MPH where timing started to advance smoothly up to a final 22.5 degrees at 85 MPH.

AFVETTE

Yup in fact when my son bought his 2010 Camaro SS with the M6 I had to teach him how to drive it (he never drove a manual before). After a few hours he was able to rev match up and down, launch w/o killing the car and mastered various shifting patterns (1-3-5 or 1-2-4) etc. But near the end I taught him how easy it is to "walk the car away" from a dead stop w/o slipping the clutch off idle.

The LSX motors are torque monsters. You can easily launch them w/o beating the bejesus out of them.

Tom

383vett

We do indeed have torque monsters.

dvandentop

LOL I am sure some ricers went home and told their friends they were faster then a z06

Wanderer Z06

I was thinking the same thing!

Hope the track announcer let everyone in the stands know that you started out in 6th gear. LOL

FNBADAZ06

The NHRA racers were interested in what it was going to do as well. I ran against a white Ford Maverick race car that went 11.60@115.77 MPH .
Just to let him know what it would've looked like if I hung one on him, I later ran a pass full bore for 1000', but hit the brakes hard before the traps as to not **** off the NHRA officials and still popped an 11.34@122 MPH....against a 750 Sport bike that went 11.06@126.
I guess the track officials were eating dinner as nobody said anything to me but I was finished for the night anyways.

dgdoc

I'm impressed ! I think you are the first person to actually make a pass at the track to find out just how a C6Z might perform using only 5th gear. The C6Z is geared on the tall side so it really is at a disadvantage compared to most performance cars, especially in 5th gear.

The fact that you did this and also data logged to show how much power the car has at incredibly low RPM's is great.

I'm waiting for someone to jump in here and provide driving tips on how to get better times...i.e.
"......skip the burnout....then try slipping your clutch for the first 1000' feet..."

NORTY

Since "5th gear from a stop" has been done before (TOPGEAR,) it would have been interesting to see what a "3rd gear" pass would have netted. (At least 3rd gear would have the best shot @ a decent trap speed.)

OP~ Try a pass in 3rd gear please.

Then, try one in 4th, just for the heck of it!

Post up your slips, if possible!

BSSN

In all fairness, 996's are dogs (non-turbo). I stomped one from 60 in 4th gear back when I had my old F-body LS1, stock.

I am impressed with your dedication to proving a point! Awesome!

FNBADAZ06

Me and CF member HOXXOH are going out to Wednesday night's drag night.
I'll give it a crack and post the results

FNBADAZ06

Being that the old venerable 2 speed Powerglide tranny is still a very popular transmission used in drag racing, the NHRA racers who were attending this weekends race and where aware of what I was going to do were pretty impressed...escpecially seeing that it was a stock street car that could pull such a high gear that would also be able to reach speeds approaching 200 MPH. The racer's montra "there's no substitution for cubic inches" rang true that night

FNBADAZ06

definetly saves on the cost of drag radials
No "quick clutch release while rolling into the throttle" required

KLLRVET

Nothin special about that, I can do that with any car

40YRW8

A friend of mine had a 300Z twin turbo and we argued all the time about which was better, a small, high-tech motor or a large low-tech motor. The only thing we could agree on was that the best thing was a large, high-tech motor Even though our motors don't have direct injection, 4-valve heads or variable valve timing, make no mistake, for a pushrod V8, it is a very high-tech motor.
Gary