. JK
Weak Quarter Mile
Thread Starter
Pro
Joined: Dec 2007
Posts: 630
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From: Orlando / Daytona Beach Florida
Weak Quarter Mile
So I was wondering if you guys think there could be something wrong with my Vette. I have consistenly been running early 14's and thought that these Vette's packed more umph than that... I used to own lots of mustangs that would kill my Vette with similar mods. Everything's stock except a catback/K&N drop in. It's an A4. I normally torque brake it a little bit and drop it on the last yellow. Should I be satisfied with early 14's or are these supposed to be quicker. I'm going to change the fuel filter soon, Im not sure if/when it was previously done so maybe she's not getting enough fuel? What do you guys think? Thanks in advance!
Pro
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From: was Brookline MA but now San Antonio TX
AMP Racing
Joined: Aug 2006
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From: Washington TWP NJ
2023 C5 of the Year Finalist - Modified
2017 C5 of Year Finalist
St. Jude Donor '09-'10-'11-'12
The other day I saw at Atco, an a4 c5 do 12.99 - I dont remember the mph.
It was bone stock.
Something might be wrong with your car. What year? How many miles? What type of tires? Where were you running?
Get a tune.
Post your slip and some of the more experienced guys on here will be able to help you more.
It was bone stock.
Something might be wrong with your car. What year? How many miles? What type of tires? Where were you running?
Get a tune.
Post your slip and some of the more experienced guys on here will be able to help you more.
Drifting
Joined: Jan 2005
Posts: 1,517
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with a tune and a Vararam on a really bad track (zero prep) in my first time out I pulled a 13.6 with a lot of wheelspin everywhere. The tune was just A4 settings, and done by me, not a famous tuner. I would think high 13 should be easily attainable for most stock A4's. I was on Yoko Advan Sports in stock Z06 sizes, which could have helped.
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
Loose nut behind the steering wheel. 
Seriously though, you should look up the DA of the track you were at and then post the DA of the track at the time you were there as well as all of your timeslip stats.
Here's the calculator. http://www.dragtimes.com/da-density-...calculator.php
Seriously though, you should look up the DA of the track you were at and then post the DA of the track at the time you were there as well as all of your timeslip stats.
Here's the calculator. http://www.dragtimes.com/da-density-...calculator.php
Thread Starter
Pro
Joined: Dec 2007
Posts: 630
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From: Orlando / Daytona Beach Florida
I'm actually on Goodyear EMT's. Those puppies certainly do their fair share of spinning of the line. I can't remember but I want to say that my 60' is somewhere around the mid 2's. The car has about 56,000 on the clock and is a 2000. I will post a few slips if I can find them soon. A 12.99 seems waayy out of reach, that thing must have had slicks or something.. I'm still curious what the rest of you guys with stock C5 A4's are getting. Thanks
Melting Slicks
Joined: Dec 2003
Posts: 3,315
Likes: 17
From: Near Jacksonville Fl.
The runflats are 50% of your problem get a decent tire back there and you'll see a different car!
The other issue is would suspect is being an A4 unless you have the performance axle (G92) 3.15 ratio it's still going to be slow.
A 3.42 axle will really wake up your car, but then your going to need better tires
see where this is going...........
The other issue is would suspect is being an A4 unless you have the performance axle (G92) 3.15 ratio it's still going to be slow.
A 3.42 axle will really wake up your car, but then your going to need better tires
see where this is going...........
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Safety Car
Joined: Sep 2007
Posts: 4,009
Likes: 491
From: South Florida
Normal times for the A4 go from 13.0-13.30 @ 102-106mph. The car that went 12.999 was bone stock, but the DA was like -1800 that day(helps a lot). My stock 99 6speed went 13.31@106mph in decent air with a 2.1 60ft. Ask anyone that knows me and they'll tell you I suck at driving. Get your car on a scanner and check it out. I would start by checking the O2's, cats, and fuel filter. It could very likely be the fuel filter because that won't set off a check engine light in most cases. Let us know how you make out.
Heel & Toe
Joined: Aug 2005
Posts: 23
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From: new York
first time out
First time out ever at Englishtown the other week ran constant 13.5 13.6 all night with borla stingers and an intake in my a4 c5 with 2.73 gears . so yeah id say 14's a little high in my opinion
Last edited by corvette01; Nov 24, 2008 at 11:22 AM.
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
How are you launching the car? Traction control was off at the dragstrip right??? Mid 2's 60' is not launching properly unless it's raining and they decided to keep the track open. You should be able to get a 2.0 60' on a bad day with a broken arm. Are you simply standing on the converter and flooring it when it's time to go or are you easing into the throttle. For every 10th off your 60', you get 2 in the qtr (typically). Proper throttle control is key to good 60' times when you're traction limited.
Safety Car
Joined: Oct 2004
Posts: 4,816
Likes: 132
From: Plano TX
what is your axle ratio?? Whats is your Density altitude? What was your trap speed? What was your 60' time? The cat backs will give you 0 horsepower. Restriction occours before the cat backs.. specifically.. stock exhaust manifold, pre cat pups, and catalytic converter and the k&N filter does nothing with the restrictive airbox.. Its like running headers through 1 inch pipes.... Answer the above questions and we can pinpoint where the problem is
Last edited by David426; Nov 24, 2008 at 11:41 AM.
Drifting
Joined: Jan 2005
Posts: 1,517
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get some tires and practice your launch a bit
Pro
Joined: Jun 2007
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From: St. Louis Missouri
My first time out at Gateway International. I ran 13.5s. A4, 2.73, Blackwing, SLP Powerflow, Kuhmo Ecstas in stock sizes but I reduced air pressure in the rear and increased it in front. Got that crazy adjustable shock system and had it in performance and had car in Competitive Driving mode. Braked up the converter some then left at 2nd yellow. Managed a 2.0 60'
Look into getting a tune. Consistent 14's are too low.
You can check here: for times people get stock and/or modified
Last edited by TooMch; Nov 24, 2008 at 01:09 PM. Reason: added link to perf times
Thread Starter
Pro
Joined: Dec 2007
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From: Orlando / Daytona Beach Florida
I'm in agreeance with you all. The low 14's are just embarrasing.. It really shocks people to see the Vette do so poorly. I had a Midas check out my fuel filter and they said it looks like it was replaced recently so they did not recommend changing it. As for the DA, I really cant tell you what it was then. I ran those times in the summer. Since im in Florida chances are it was against me. On the launch I put her in D, hold the brake and bring the RPM's up a few hundred above idle, and punch it on the 3rd yellow. TCS off. I took psi out of the rear, but with EMT's I dont think that makes very much sense given the sidewall. Those things could run the track empty and hop lol.. Something's not adding up here? Why's my car so slow lol. Maybe the track's in bad shape?
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
I'm in agreeance with you all. The low 14's are just embarrasing.. It really shocks people to see the Vette do so poorly. I had a Midas check out my fuel filter and they said it looks like it was replaced recently so they did not recommend changing it. As for the DA, I really cant tell you what it was then. I ran those times in the summer. Since im in Florida chances are it was against me. On the launch I put her in D, hold the brake and bring the RPM's up a few hundred above idle, and punch it on the 3rd yellow. TCS off. I took psi out of the rear, but with EMT's I dont think that makes very much sense given the sidewall. Those things could run the track empty and hop lol.. Something's not adding up here? Why's my car so slow lol. Maybe the track's in bad shape?
As you know, spinning the tires is counterproductive. Since the goal is to put down as much to the pavement without spinning the tires, you need to learn to open the throttle at a rate that maintains traction rather than "punching it". This changes with weather, tire pressure, track conditions and prep etc. If you ever watch the cars at the drag races, whoever spins, loses. You need more seat time focusing on your 60ft. When you post the details of your timeslip, we can go over your MPH. That dictates the condition of the drivetrain. You can have 1,000 horsepower and run slow times (ask me how I know
(1000-1100 crankhp and only ran 10.66, but at 142)), but your MPH will reflect the car's power. There are guys out there killing my times with way less power because they have better traction, automatic transmissions, or, unlike me, they've just figured out how to launch their car. If I punch it off the line, it goes straight to redline. If I shift, the car bogs. It's a real task trying to take it to the edge without going over on throttle position. You have the luxury of an automatic on your side.
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
Also, that link I posted will give you corrected times. People get their feelings hurt when others beat their times with the same corrected horsepower, but they don't understand how much the DA' will affect your times. The guys at Atco up in NJ have close to, if not the best DA in the country.
Safety Car
Joined: Oct 2004
Posts: 4,816
Likes: 132
From: Plano TX
still need your trap speed and 60' time.. that will help out a lot. to find out what ratio you have.. Open the glove box. You will see a list of options for your specific car.. They will be in code.. G92 is the code or option you are looking for.. G92 is the Performance axle ratio option, which is 3.15:1... If you don't see G92 anywhere on the list then you have the standard axle ratio 2.73:1 The D/A is important.. If you are in Florida, then you have humid conditions... mix that with high summer temperatures and a 2.73 axle and low 14 second 1/4 mile times are just about right... A good D/A should put you around 13.5-13.7 (Normal for a stock a4 2.73) Cold dry air at a low altitude makes a hugh difference in horsepower compared to hot humid air
Last edited by David426; Nov 24, 2008 at 05:46 PM.
Safety Car
Joined: Sep 2007
Posts: 4,009
Likes: 491
From: South Florida
Do not go get a tune and expect things to magically be better. A relatively new fuel filter can still be considerably choked up. I would change that out, get some new spark plugs and plug wires, and scan your car to see if any codes come up. Then I would go ahead and get a vararam, break it in for 50 miles or so, then get a tune. The DA in Florida usually sucks which doesn't help, but your times should still be steadily in the 13's. Let me know if you need help with deciding on which parts to buy. I am also selling my MSD wires, they only have about 15k miles on them. They're in perfect working condition.
Dave
Dave