I will sell you my 2.66 gear ratio for some peanuts, and you should be the first to run in the 9.9x with only a tune and a gear ratio swap.

Just a condition: You put a canadian flag on the car as major sponsor.

Nice driving, congrats on the new car

Seb

 

Awesome runs, I guess even the Z06 guys can not argue on which car gets down the 1/4 much, much quicker and much, much faster.

 

Stock for stock.....I think most if not all know that....thanks to the 133 hp more........Fartpipe did as well if not a touch better with his mods on his Z........so the point is??

 

So the point is your logic is flawed. Stock for stock the ZR1 is faster then the Z06, and when he does bolt-ons it will continue to be faster then the Z06. He went 11.09 @ 126 with the stock Z06 on DR's and went 10.42 @ 134 with the stock ZR1 on DR's. Now with bolt-ons he did go a 10.34 @ 134, guess we will have to wait and see what he does with bolt-ons on the ZR1.

 

The point is, many, many Z06 guys have said there is hardly any dif stock for stock between the two cars on the drag strip.

 

That's called ZR1 envy.
Nice avatars btw.

 

Here is FARTPIPE's scan on the 10.42 pass.



Some interesting things to note.

1. Launch rpm = 4373, 100% throttle, full boost of 8.2 psi (calculated as the scanned map of 22.9 psi - 14.71 baro (per dragtimes, @ 3 pm, 54 degrees, 44% humidity, 29.95 baro, (29.95 inches of mercury = 14.71 psi), = (204) DA). I'm assuming on these blower calcs as I'm a N/A guy...I look for .99-100 kpa and know my filter's not plugged and I'm good.

2. Interestingly, the car was revving up to 5357 under about 1/2 throttle, then FARTPIPE floored it, the RPM's went down to 4307, boost was building to max of 8.2 during that time...up to 4373 as the car spun just a smigen at launch (FARTPIPE compensated by reducing throttle 5% for .130 of a second), then bogged down to 3424 during the launch sequence (all at 100% throttle). Not sure why the RPM's went down when he floored it, clutch in, from where it was at 1/2 throttle...must be some sort of torque management kicking in. My car doesn't do that.

Some data:

0-60 time = 2.195 seconds...though if his DR's are shorter than stock that time is a little off...still...blazing fast...assuming they are short, even using 0-65 mph it's 2.455...handily beating the Veyron.

60-130 time = 6.165 seconds.

1-2 shift time, .195 seconds, 6,564 rpm.
2-3 shift time, .260 seconds, 6,621 rpm.
3-4 shift time, .195 seconds, 6,813 rpm. I wonder if FARTPIPE went clutch in before letting off the gas on 3-4, as you can see the rpm flare up to 6,922 when he was off the gas.

It appears the scanner only reads time in .065 increments...3x.065=.195 so the shifts were likely between .130 seconds and .195 seconds, but below .195 except for the 2-3.

FARTPIPE got about 13 mph wheel spin on the 1-2 shift, 8 mph on the 2-3 shift, and 10 mph on the 3-4. Some ET left on the table there, but I couldn't find any other ET left on the table.

Car was running about 26 degrees timing, IAT at the start of the run was 75, going down to 63 degrees in 4th gear through the end of the run. I'm not familiar if that's the pre-blower IAT or the IAT after compression on the pid that was scanned. My .cfg wouldn't read the knock sensor for some reason but based on the commanded timing line I don't think it had any knock. Interesting that this blown car takes more timing than my N/A car.

FARTPIPE ran it to 6400 in 4th...145 mph....in 10.65 seconds. Feels good to go that fast. I won't type how long it took my car to go 145.

Overall, one of the cleanest runs I've ever reviewed.

Hats off to you FARTPIPE. You drove that car yesterday.

 

Nice info!

 

well those 'many' are wrong, the wise ones know better

 

huh? i think we agree on the same thing???

 

Great info for his next track run Joe

 

Exactly, no bench racing here, real live results, over and over again and again.

 

Man I impressed.............good job!

 

Joe_G, I was gion over that log. Yes VERY impressive, the shift times are almost identical.

He used my scanner, so I just did the basic settings. I wasn't sure what would all be different in this car.

I am just wondering why the car looses 6* of timing in 4th gear. Torque Management? KR would of just pulled some timing and tried to put more back in. It just drops off and holds the 20*.

The 26* of timing was suprising too. That's a healthy dose of timing @ WOT.

 

In my opinion, it is a pretty safe bet that there is a full 3/10th difference in ET and a full 4mph difference in trap speeds between pure bone stock C6 Z06s and pure bone stock C6 ZR1s which are mildy quicker/faster.
I attribute much of the what some might call 'way too small of a gap for that huge of a power difference' to the ZR1s much higher weight.
I only wish that the ZR1 was about 100 pounds lighter from the factory, it could allow it to put even that much more of a hurting on some of the competition.

 

Pit-man I always say if you want to improve it you need to measure it (I'm a CPA so that's my training too), and I find these scans invaluable for improvement.

If I was at the track and looked at that scan I'd have him lower tire pressure 2 psi (to avoid spinning on shifts) and sneak up to a higher RPM before flooring and letting out the clutch as the car seems to have some sort of torque management preventing it from revving up to 6500 at WOT with no load.

As I think about it, it's probably a secondary acceleration based rev limiter like my car used to have before I tuned it out. I need to check out a LS9 stock tune.

 

Fartpipe, do you lift when you shift, or do you powershift? Awesome driving either way!

 

Why does this show a max boost of 8.2 instead of 10.5?

 

A pullied supercharger and a turbo with a waste gate operate very differently. If this was a turbo with the capacity to handle the cfm of air to make its 10.5 it would make its 10.5 lbs no matter air conditions.
Since this is a pullied linear supercharger that is pullied for 10.5 lbs the supercharger can only process that certain amount of air at that impeller speed, in cold dense air you can see lower boost readings while still making more power.

 

He doesn't power shift, he's lifting. Look at the green line in the third chart down. That's his gas pedal. He lets almost fully off the gas, but he does it quickly. The man's got some fast footwork.