Hi,

I posted this in the Corvette Racing section, but didn't get any feedback.

Can you describe your technique for launching a 6-speed C5 with stock EMT tires on a drag strip in order to achieve the lowest 60' time? What rpm do you have the car at, do you drop the clutch, do you try to avoid all wheel spin or are you trying to get a little spin at the start, etc.? This is all assuming that traction control is off.

Thanks for the advice.

 

rpm's should be between 1500 to 2,000 .. you want to slip the clutch a little and roll on the gas at the same time. takes a little practice.. the emt's are not the best choice for the track.. I have over 50 passes with them and if you can get sub 2.0 60 ft times you are doing pretty well.. expect short times to be between 2.05 and 2.10.. good luck :seeya

 

Thanks for the reply.
With that technique, will the tires spin while in 1st? I guess I'm confused as to whether or not there should be a little tire spin or not? Common sense would say that you want to have no tire spin, but I'm not certain this is the case in practice.
Also, how much does rear tire pressure affect the traction with the EMTs?

Thanks again. :cheers:

 

As little spin as possible. I've tinkered with tire pressure in the EMTs (way, up, way down, with stops along the way) w/o much luck. Some say you can heat them enough to stick... :rolleyes: If you're gonna do that you might as well buy the right tire.

 

Letting the air out of the EMT's will really not do you that much good because of the very stiff sidewalls in the run flat design. The goal is not to spin the tire at all but that is easier said then done. If you want to get serious about drag racing I strongly suggest buying a drag radial and dont waste your time with the EMT's.. :seeya

 

Here are some techniques I use

1. Drop your rear tire pressure to 26 pounds.
2. Turn your thremostat all the way up BEFORE you stage, this will kick on your fans and should get your coolant temp down to 190-194.
3. Before you launch turn everything off, air, radio tch/ah
4. I've made my best passes on 94 octane. I show up to the track with no more than a quarter tank.
5. I you have two tops dump the painted one and come only with the glass top. saves weight :)
6. Do everything Chris said :D
7. HAVE fun
8. You're probably already aware fo this but the EMT's blow chuncks. My next mod is going to be the Nitto 555's. Tires are defnitely your next mod if you're even remotely serious about racing.
9. Bypass the Thtottle body. It won't add any ponies but it will prevent you from losing horsepower when you're ledfooting down the track...cheap mod too, around 10 bucks :D

Good Luck!

David In Indy :seeya
----------------
2000 NBM M6-Coupe
All Options minus F45
Euros/Lloyd Mats/Chrome Shifter/Ripper/Halltech tric/T-bypass/Taylor
Wires/TTS Headers/High Flow Cats/X-pipe/Indy Corsas/Baers/Z06
Calipers/Russell ss brake lines/Hawk Pads/Porsche DOT4 Hi-Performance Brake
fluid/Redline oils/Zaino/Engine Dress by Auto Buffs and Design Specialties

 

Thanks for all the great info. I have a 160* thermostat and Vinci fan controller (for my 2002 since no programming available yet) and TB Bypass sitting around in my garage. I need to install those soon.

That's a good point about having the gas tank closer to empty versus full. I didn't even think about that. :crazy:

Great stuff to know!

:cheers:

 

I heard it was best to have your have your gas tank full. Maybe for wieght over the back tires?

 

That can go both ways.. yes you will have more weight over the rear tires to hook better but remember for every 100 lbs you lose about a tenth in the quarter mile.. On the other side of the coin for every tenth of a second you can knock off the short time you will gain about a second and a half on the top.. :)

 

6200 rpms and drop clutch :D

 

What you need to do is put some hand cream on the bottom of your shoe, mash the gas till she bounces off the rev-limiter and slid your foot off the clutch :D :D :D

 

Early on a 3/4 tank full of gas helped reduce my 60's.

Now its more dependant on the track. If the track is prepped well and I'm hooking I'll use a 1/4 tank.

If no hook is to be found I'll fill up to about 3/4's of a tank.

Its worked for me so far. The EMT's are very challenging as far as a good 60' is concerned.

Good Luck and have fun out there!

 

The two best people to get this info from would be POWERSHIFTER, who runs an almost stock Z06 to under 12s and C5-PIG who's had a 430rwhp car pull a 1.59 60'. :eek:

See if you can entice them into giving up some of their Driving Secrets. :cheers:

 

ROTFLMFAO Hahaha :lol: :lol: :lol: :lol:

 

Tiger Shark,

Nice meeting you at the track Saturday, it's The 2001 Red Coupe Bandit.
I know how you feel since last November was my 1st time to race as well. No advice for you as I have an A4, but just keep practicing. The Tiger Shark kit looks pretty cool. It will be interesting to see if you get it done.

What were your times like last Saturday? (You don't have to post them if you don't want to). Heck my 1st run was a 13.34, then on my 2nd I was able to beat my best run from last Novemeber by a few tenths of a second. It takes practice, especially in an MN6!!!!
I need a lot more runs to get it down myself.

till later

The Bandit...............


[Modified by 2001 Red Coupe Bandit, 3:19 PM 2/6/2002]

 

See if you can get Ric to tell you what that little piece of string was for ;) Be prepared for Driving Secrets = Many Years of Practice though.

 

No wonder boys are breaking stuff :eek: :p: :eek: :p: :eek:

 

Hi. Nice meeting you too. Let's just say my 60' times weren't that good. Of course, it was my first time to try anywhere. During the first run (beside the distraction from the ricer beside me that blew something and started leaking fluid all over his lane :mad :smash: ), I couldn't get any traction at all and kept spinning the tires. My rpm was pretty high when I launched. I know that was one of my main problems. I basically gave up down the track, because I knew my run was already messed up. :eek: So, I won't go into any numbers on the first run. :D

So, the second time (roughly 1 1/2 hours later) I did the complete opposite and played Mr. Conservative. In fact, I didn't spin the tires at all. Managed a slow 14.2 second run :cry at a trap speed of 107.36 mph, and my 60' time was downright pathetic at 2.661 compared ot the numbers I've been seeing all over this forum. :bb My reaction time was .675. :cool:

I have no doubt that my 3rd run would've been the happy medium I was searching for, but there were soo many cars there that I decided not to wait that long for another go. :crazy:

About the production Tiger Shark panels... I'm waiting to hear from Nate on pricing. I think it would look really sharp without the front chin spoiler, but I'm wondering about the aerodynamics of the front without it. It's too bad there's only one picture posted on the forum of the front. It's at an angle and you really can't tell exactly what it would look like straight on. My dislike of the chin spoiler is based 100% on that picture.

Take care.
-Keith

p.s. I had a fun first time. With some more experience, I have no doubt that I can get that 60' time down to where it needs to be. :cheers:


[Modified by Tiger Shark, 8:10 PM 2/6/2002]

 

I tach it up to 2700 rpm, and dump the clutch WITHOUT depressing the gas any further until I hook, which takes about one second. Then I gradually depress the accelerator to the floor so within less than two seconds I have it mashed. I get minimal wheelspin, and I get the motor into it's torque curve right away. This whole process takes little more than two seconds. You can slip the clutch to maintain constant revs, but you'll glaze your clutch and wear it out prematurely, no matter what brand it is.

Get a G-Tech and practice.

 

Paul is right about glazing the clutch. Been there, done that. His technique takes a lot of restraint and practice to modulate the pedal while it hooks up, but Paul knows his stuff. Keep in mind that the track conditions play a big part in the launch.