This thread is for discussing 1/4 mile runs, videos etc. Please discuss everything here instead of the threads with the actual times posted.

Take it to the strip guys. Mine here in INDY costs 15 dollars to run your vehicle, with all the runs that you can make in one night.!!! 15 dollars!:confused0068::confused0068::confused0068: No cops, all legal, with emergency crews on site. You can't get any better than that.

And as always. Double check your tires before running. Remember those things that keep you attached to the road???:D

Lucas Oil Raceway
(Or if your in INDY and still call it the old name, IRP!:headbang:)

:popcorn:

For now the average Bone Stock 1/4 Time is 13.54. It's funny how an L99 is currently the quickest car on the Bone Stock list you know.

lol

Good info and thats not expensive at all:thumbsup:

No it's not. It's actually quite ridiculous how cheaply you can run your car to the max without having to worry about police, bad roads, traffic, and any other obstacles that you may run into while running your car illegally on the road. Everybody is there to run their cars and see how fast they can go. Hell, I've seen Volkswagens making runs out there on Tuesday nights, with chicks driving them!:confused0068::thumbsup:.

Plus, YOU GET A TIMESLIP!:happyanim:

2 more spots left on the fast list(stock catergory)...then people start to get bumped off if and when faster folks show off..woowhooooo

Got a question about trap speed...

Got my time updated on the 1/4 list and noticed my trap speed is pretty high compared to everyone else...even higher than the fastest run and I ran .6 slower?

Why? 60 ft times?? Something else?? I know the car is faster than a 13.8 but to be .6 slower and trap the same seems odd to me?

Here is the list...


1. NineBall - 13.07 @ 109.07 mph (LS3, M6)
2. Matt (tunetime) - 13.25 @ 106. 4 mph (L99, A6)
3. Foglin - 13.28 @ 106.8 mph (LS3, M6)
4.Amwellls1 - 13.31 @ 107.0 mph (LS3, M6)
5. BLT4SPD - 13.58 @ 96.34 mph (L99,A6)
6. PatrickfromMD - 13.59 @ 104.55 (L99,A6)
7. I Am Legend - 13.82 @ 106.91 mph (LS3,M6)
8. Toehead93 - 13.86 @ 102.66 mph (L99,A6)
9. Pharmd - 13.90 @ 102.3 mph ( L99, A6)
10. Mlee - 13.99 @ 103.1 mph (L99, A6)

1) Trap Speed will tell you about your HP to weight.
2) ET will tell you more about traction and your launch.

Of course ET is important to true drag racers, because the winner is the one that gets there first. However, everyone is not necessarily true drag racers in our attempt to get a power estimate. Honestly, ask 10 guys at the track "What kind of trap speed are you running?" and 8 out of 10 will answer with their ET - to one or two decimal places even. When you say, "No, no, I meant trap speed", they will fumble with a broad estimate with NO decimal places and might even have to pull a time slip out of their pocket to check. Try this question when you're at the track; it's almost funny.

THE DYNAMICS OF TRAP SPEED VS. ET

After running lots of quarter miles, it becomes clear that how well you do in the first 100 feet of the track is KEY to a good time. The last half of the track is KEY to a good speed.

Let's use an example of a stick-shift mini-pickup that on a perfect run, gets a timeslip of 19.50 seconds at 70.00 mph in the quarter.

Imagine that the light turns green, the truck moves two feet and the engine dies for three seconds. After restarting the engine, the driver proceeds to then complete a perfect pass. His time slip would show 22.50 seconds at 69.97 mph. The ET was 3.00 seconds high but the speed was almost unaffected.. why?? It's because his racetrack was 1318 feet long instead of 1320, and in those last two feet this truck usually gains an additional 0.03 mph. However, the clocks recorded the long time. My point? Much of a great ET is made by a great launch.

Now take this truck again, and the driver leaves right on the green light. However, he misses the 3-4 shift when he's at 1250 feet. He coasts for the last 70 feet while trying to find fourth gear. Now instead of accelerating another few mph in this final 70 feet of the track, he decelerates over this distance. His timeslip; 19.51 at 67.83 mph. Note how the et is almost perfect (only off by 0.01 second) but the trap speed is way off (over 2 mph slow)! On a good run, traveling that last 70 feet at an average of 69 mph, would have taken .692 seconds. At a 68 mph avg., that 70 feet takes .682 seconds. That's why his ET only varied by .01 seconds, yet the trap speed was 'way off'. My point here: the end of the track is critical to trap speed; shift rpm, missing a gear... these are the big players.

Hopefully these examples are clear. Neither of these runs are 'perfect' runs, it's just that one has an error at the start, one at the finish and the results are obvious. The start of the track is a big player in the ET, but a small player in the mph. The end of the track is a big player in the mph, but a small player the ET.

So for the casual T-Bricks member who wants to get a HP value, you don't have to buy slicks, or wish you had a limited slip differential. You don't really need to heat the tires in the waterbox, or launch with huge power braking. As long as people get their shift rpm right and don't miss a gear, even a rookie will get the appropriate trap speed for their vehicle.. but honing the perfect ET. requires being rude to a clutch, buying steeper gears or slicks.... hey, we're trying to make this recreational.

OPTIMIZING SPEED

If your goal is to get a good trap speed, what are your options? More power, of course - and less weight is obvious (but it will come out in the power calculations as no increase in power). Shift rpm chosen (auto or manual) and the time it takes you to shift (with a manual) are probably the most important tools you've got. Try different shift points to maximize your trap speed. Reduce rolling resistance by pumping up all tires to their rated pressure. Some people think that running lower pressure might help the traction in the rear, though. Of course more traction will help et, but with most street tires, running street tires within 5 psi of rated pressure will provide you with maximum traction in the first place.


REACTION TIME

The ET clocks don't start until you've actually moved around 8 inches (this is called the rollout)... so don't worry about trying to leave right on the green light. You could wait 5 seconds after the light turned green, and still get a 19.50 timeslip in our truck example above. Your timeslip does show a separate calculated time, the "Reaction Time", which in this case would be 5 seconds. That is the time from the light turning green until you rolled out of the starting zone. It's not a big thing for our discussion here.

THE LAUNCH

For the most part, a decrease in ET is accompanied by an increase in trap speed, but don't go overboard on the launch in your zest to rule the world. Just try to get smartly underway without spinning the tires much at all. Traction levels usually drop a solid 0.10 g when the tires start spinning.

**Found this article in another forum. **

Well I had a 2.4 60' time so my error was at the start. I made it down the track fine, but failed to get a great start!

Thanks...I do need work on my launches!! That was with everything off too (no T/C or competitive mode) so room to improve...and better times!

0.1 seconds in the 60' time typically corresponds to 0.2 seconds in the 1/4 mile ET, so if you can pull a 2.0, which seems reasonable, you would have a 13.2 ET.

Yep...just got to get out there and keep at it! :w00t:

I am still waiting for some times with slicks on the car.

well, after trying a few things, seems I getting my best 60's with leaving TC on and then basically just leaving just a bit above idle... consistently in the 2.1 range, with best 60' being 2.117... figured that wasn't bad with an open rear end and those big 20" wheels...

:word: TC worked well for me too...:thumbsup:

This is a question to Matt Tunetime, or anyone who might be able to answer. I saw he ran the fastest bone stock L99 run but is his/her car a 1ss or 2ss? and any options?

I turned the TC off but didn't use competitive mode either...basically just trying to launch the car myself and slip the clutch...I do want to make a run or two with competitive mode on to see what it can do and then I'll go back to no TC and keep learning.

You are 100% correct, nobody i mean nobody should race without drag radials or slicks imho

politely disagree... Car is a daily driver and I am incredibly lazy.. I like driving to the track..... making my runs... drive home... no tires changes here... and while I have driven in the rain with DRs, it's not some thing I want to do all the time! LOL

Speaking of trap speeds... Any one else have issues with the 20" not playing nice with the trap sensors? One local track has me trapping at 83 to 84 MPH... then went to a different track and it was trapping me at 83, then 94, than back at 83...

an no, i'm not lifting... LOL

Man, the Camaro's are cutting some nice 1/4 mile times! Especially the Tune Time stock vs. tuned run!

Nice..... :)

Sounds like they have an equipment problem, I don't think the size of the rim could make any difference.

talked to the guy at the track... his theory is with the big wheel and the big gaps between the spokes the beam is some how shining through the wheels... I've had this happen at 2 different tracks.. Did not see this issue at the 3rd track... unfortunately i seem to run the slowest at the 3rd track! LOL!

12.87
 

http://www.camaro5.com/forums/showpo...9&postcount=17

BONE STOCK:




1. speedy6963 - 12.87 @ 109.08 (LS3,M6)
2. NineBall - 13.07 @ 109.07 mph (LS3, M6)
3. Matt (tunetime) - 13.25 @ 106. 4 mph (L99, A6)
4. Foglin - 13.28 @ 106.8 mph (LS3, M6)
5.Amwellls1 - 13.31 @ 107.0 mph (LS3, M6)
6. BLT4SPD - 13.58 @ 96.34 mph (L99,A6)
7. PatrickfromMD - 13.59 @ 104.55 (L99,A6)
8. I Am Legend - 13.82 @ 106.91 mph (LS3,M6)
9. Toehead93 - 13.86 @ 102.66 mph (L99,A6)
10. Pharmd - 13.90 @ 102.3 mph ( L99, A6)
Mlee - 13.99 @ 103.1 mph (L99, A6)

:confused0068:

Times are going to keep coming down..:thumbsup:

I know that's right... :) I'll be dyno-tuning this week, if all things pan out. That'll bring me into some respectable times too.

.

So the bone stock record for an L99 is still 13.25? There hasn't been anyone else attempting to beat it or actually beat it?

I'm updating tonight..so we shall see whats been submitted

first time on the track both me and the car 13.7. 2.25 60 foot 105 trap missed 3rd cant wait to learn how to drive! thought i knew?

t/c and stability off
 

I launched at Bandimere at 4000 rpm's and spung the tires so much I had to shift into second or hit the rev limiter. So putting it in Competative mode where it runs the rpm's up over 4000 would be a waste for me.
I did however pick up over a second when I turned the stability track off along with the t/c. I just hold down the t/c button for about 7 sec and both lights com on over on the tac side gauge.
My first time out so please don't laugh...16.43 90mph with stability on>15.01 with it off at 98mph

Are we going to get some other 1/4 mile lists started for the guy that aren't stock?

Like

1. Bolts on's only (Intake, exhaust, headers, tune, etc)
2. NA (heads/cam, bolt ons)
3. Forced Induction
4. Anything goes (FI, engine work, etc)

Don't be embarrased, we're at fricken 5500' ASL... all these lowlanders don't realize how good they have it. Seen anyone else in CO do better?

LPE 570 - Mag S/C, Roto CAI, Borla Cat-Back, Pedders Xa Coilovers
-Stock tires, stock headers & cats-
(2200 miles on the odometer)

Thunder Valley Dragway - Marion, SD (Aug 14th)
82 degrees - DA 3354

This was my best run of the night, even though I redlined in third right before the end and it cut out. I should of hit 4th but I wanted to see what 3rd had to redline. This is my first time at the dragstrip - ever. On my other runs I was trapping 114mph in 4th but my launches sucked, as this thing will spin the stock tires in 1st, 2nd & 3rd. I am in the left lane and a V-Max motorcycle in the right lane. Maybe someone else can chime in on heating up the stock tires?? I was smoking them pretty good in the burnout box before my runs - good for stock tires or no? I thought 12.6 was pretty good for me as there was a 06 Z06 that had a best of 12.8 for the night.

Attachment 45994

Great runs!!! Not good smoking up stock tires....go around the water box..dont go thru it...back up to the damp area in front of the water box..burnout...release and roar out..you should get a light wisp of smoke..once you see that you are good to go...:thumbsup:

Damn - I was wondering about that. I figured smoking up the stock tires would sticky them up but it probably made them more greasy. I was side stepping the clutch and holding the brake to do a good burnout - doh!! I can't wait to get back to the track to run again. Thanks Junkie - I appreciate it!!!

No problem my friend:thumbsup:

I was thinking about taking my LT1 RS to the track tomorrow night to do some bracket racing. Anyone know how consistent these things will run and if it would be even be worth my time trying to dial it in?

My weekend is setting up to be pretty sweet, take the car to the track on friday night, then saturday morning watch it get washed by some bikini clad babes at a car show. :thumbsup:

My 2LT auto is INCREDIBLY consistent! Last time out I hot lapped her a bit... I actually had back to back passes that were 14.800!

http://www.johnnystacks.com/gallery/d/9897-1/slip.jpg

BTW, has anyone had trouble with trap speeds? Check my slip above... It's really odd.. one run I'll get the correct trap seed of 94 or so.. next slip will be 83! And no, i'm not lifting! LOL! Thing is it has happened at multiple tracks! When I ask they just :iono: