wfarmer.z

E.T. = 10.36
MPH = 133.37
DA = +500

meadowz06

Very impressive!

UnhandledException

According to these links (source is autobild), Porsche GT2RS does the 1/4 mile in 10.3s @ 139 mph. Considering these two cars are close to each other in terms of power to weight and considering Porsche has just as much drag with its giant wing, why is there a massive trap speed difference?

Porsche weighs 3309 lbs and makes 700 hp (and a lot less torque than vette). That is equivalent of 3580 lbs and 757 hp, a mere 2 hp more than ZR1. I'm not buying it to be honest. There is no way there can be 6 mph of trap speed difference but both clocking 10.2-10.3s.

http://fastestlaps.com/models/porsche-911-gt2-rs-991

3 Z06ZR1

If you have been to the drags much you would know their plenty of reason you can have 6 mph difference with those times actually could be far more between different cars. Tune time Z06's are running as quick as 9.7's at faster traps.

Zip Corvettes

Of course there can be. You really need to see the time from the 1/8 to 1/4 to understand this. Quick example. When I first started drag racing motorcycles I started on something I should not have and it was a 1260 Kawasaki Drag big. It scared the crap out of me to launch it in the beginning. So I would go race and have a dial of like 10.00 and would leave on a 60ft in like a 1.70. Now we are talking about a bike that would turn a 6oft of 1.13. I would go through the traps around 148 or so, so would a bike running a high 8. So our speeds were the same but times way off. The same works for a car chasing down another, the Porsche makes less torque so it will have a worse 60 but it may be traveling the back side of the track faster and going through the traps at the same time as the Z but with different speeds.
Drag racing is not as easy as it seems and there is a lot that can play into it.
I just read up on the Porsche and a turbo car will do that. It is really hauling at the end of the track but it can't make up the distance that the Z has already covered. So the times are really close but the trap speed goes to the Porsche, it is running the Vette down and in a 1/2 mile race it would have beat it.

racerns

Has anyone seen a real dragstrip time for the GT2RS? Not sure how Autobild test the 1/4 mile but they may be giving an actual speed not a trap speed. The trap speed is an average speed over a short distance and can be less than the actual speed.

Dave Schotz

Great Run Farmer!

Unhandled: The GT2RS dyno'd 680 to the rear. That, combined with almost 300 lbs lighter... it's going to mph like nobody's business.

Best Regards,
Dave

keagan

Fore58

Great run....Farmer. You are working hard at it.👍

blb078

Nice run, what makes it more impressive is that it appears to be an open track day and not a private rental where you can get optimal track prep to yourself. Which stock tires did this have the super sports or cup 2?

keagan

Kappa

Eric Reeves

Wfarmer, have to ask. You have damn near identical times with the Z06 in both stock and drag radial form: https://www.corvetteforum.com/forums...-fast-list.htm What are your thoughts now between the two?

pcguy2u

Great run... what wing is on the ZR1 in the first video - is that a stock option?

racerns

While his current E.T.s are only about .1 second better than his best in his Z06, you really need to take a look at the 60' times and the DA for his Z06 runs. The same air and 60' times would improve his ZR1 times by .2 to .3 second. I think the best ZR1 times will end up being ~.4 sec quicker than the best Z06 times.

Fore58

You're right, Racerns. Some of the forum members just don't understand 60 ft times

Eric Reeves

Ok, but I am looking at the mph specifically. Plus the ZR1 had +500 DA. I don't know for sure but I would imagine the Z06 run has worse. I expected a bigger difference between the two than what we are currently seeing. Kind of like between the C6Z06 and the C6ZR1. There was a substantial mph difference between the two. Here the Z06 had a higher mph which I would never have expected unless it was a bad run for the ZR1.

OnPoint

Farmer reported at the time, negative DA and very good track prep, and a slightly better 60', at MIR for his bone stock run in his Z06.


And it's still pretty early. I bet we see higher mph - particularly when run in similar negative DA and conditions.

FastMatt2

Good times!

What surprises me about the ZR1 is them only picking up 25-26 mph on the back 1/2 of the 1/4 mile. I would expect closer to 30mph, I wounder if that's drag or something in the tune. Would be interesting to see a log and see if AIT's or something is pulling timing past 110 mph or something.

racerns

Both of his record Z06 runs were in -1300 to-1400 DA at MIR. I would wait until he makes passes at MIR in similar conditions to make a true comparison. The fact the he had a worse 60' and trap speed than his Z06 runs but still ended up with a faster ET should tell you something.