Performance Results Dyno sheets, Timeslips, Track Records, Who has the Fastest C5 Corvette?

slow times why????

Thread Tools
 
Search this Thread
 
Old Dec 29, 2014 | 10:45 AM
  #1  
pharestutt's Avatar
pharestutt
Thread Starter
Instructor
10 Year Member
 
Joined: Nov 2010
Posts: 241
Likes: 0
Default slow times why????

1998 a4 coupe
My mods are
216/220 duration 560 lift cam
Lt headers
Catback exhaust
Cai
315 gear

Why are my times same as some guys in stock vettes



Name:  ForumRunner_20141229_104507.png
Views: 543
Size:  242.8 KB
Reply
Old Dec 29, 2014 | 12:50 PM
  #2  
95rtturbo's Avatar
95rtturbo
Drifting
10 Year Member
 
Joined: Nov 2011
Posts: 1,377
Likes: 41
From: Chesterfield (St. Louis) MO
Default

Is your car tuned? What elevation are you at? Based on your trap, you are obviously down on power with respect to your mods.
Reply
Old Dec 29, 2014 | 01:00 PM
  #3  
pharestutt's Avatar
pharestutt
Thread Starter
Instructor
10 Year Member
 
Joined: Nov 2010
Posts: 241
Likes: 0
Default

Originally Posted by 95rtturbo
Is your car tuned? What elevation are you at? Based on your trap, you are obviously down on power with respect to your mods.
203 ft above sea level
Reply
Old Dec 29, 2014 | 01:34 PM
  #4  
Rob Petyo's Avatar
Rob Petyo
Le Mans Master
Veteran: Navy
25 Year Member
Liked
Community Favorite
 
Joined: Mar 1999
Posts: 6,029
Likes: 85
From: Palm Coast, FL
Default

Happened to me when I first put in a cam even had a set of tires on it and went a 13.1

Gears have a lot to do with it
How much gas are you carrying
You could remove the pass seat (weight)
Needs more air/fuel - bigger throttle body / intake
Need to lower your 60'
Reply
Old Dec 29, 2014 | 01:49 PM
  #5  
123sugey's Avatar
123sugey
Dig
Supporting Lifetime
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2006
Posts: 5,467
Likes: 1,127
From: Port Saint Lucie FLORIDA & HONDURAS
Default

Need a converter
Reply
Old Dec 29, 2014 | 07:36 PM
  #6  
Hanlon's Law's Avatar
Hanlon's Law
Racer
10 Year Member
 
Joined: May 2013
Posts: 360
Likes: 6
From: Panama City, FL
Default

Aside from the other great advice offered here, weather is a huge part of this equation too. Air density (typically measured in density altitude) can make a bigger difference than the mods you have when compared to a stock car in perfect air (lower density altitude). This calculator will give you a decent idea of what your car could run in ideal conditions if you still have the weather data from your track day. http://www.dragtimes.com/da-density-...calculator.php
Reply
Old Dec 29, 2014 | 10:51 PM
  #7  
Stroker87's Avatar
Stroker87
Melting Slicks
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Feb 2014
Posts: 2,725
Likes: 149
From: chicago area IL.
Default

you didnt list tuned? was the car tuned after the cam install? have you added any weight like heavy sub box?

if it wasnt tuned that be the 1st thing I'd do, my cousin's 100% stock 01 ran 13.1x 13.2x like clock work
Reply
Old Dec 30, 2014 | 07:44 AM
  #8  
Shirl's Avatar
Shirl
Safety Car
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2008
Posts: 4,831
Likes: 1,847
From: NJ
2025 C8 of the Year Finalist - Modified
2023 C8 of the Year Finalist - Unmodified
2022 C7 of the Year Finalist - Modified
2021 C7 of the Year Finalist - Unmodified
Default

Exactly. If you don't have a tune, get one! My stock C5 ran 13.1 like clockwork too. A Diblosport tuner and a Blackwing put it at 12.7. Then a professional tune after adding headers, B&B's with the Blackwing put it at 12.3's. With a cam and a tune at that altitude, I would think your car would do at least low 12's.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-1

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-2

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-3

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-4

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-5

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-6

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-7

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-8

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-9

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
Old Jan 1, 2015 | 01:21 PM
  #9  
dragls's Avatar
dragls
Instructor
 
Joined: Jan 2014
Posts: 143
Likes: 30
From: Orlando
Default

Auto or manual?
Reply
Old Jan 1, 2015 | 03:35 PM
  #10  
RonSSNova's Avatar
RonSSNova
Safety Car
10 Year Member
All Eyes On Me
Photogenic
Top Answer: 1
 
Joined: Aug 2011
Posts: 4,447
Likes: 409
From: Portland OR
Default

Read the first post.
A4, 3.15 gear denotes auto trans.
Reply
Old Jan 1, 2015 | 08:04 PM
  #11  
dragls's Avatar
dragls
Instructor
 
Joined: Jan 2014
Posts: 143
Likes: 30
From: Orlando
Default

Originally Posted by Shirl
Exactly. If you don't have a tune, get one! My stock C5 ran 13.1 like clockwork too. A Diblosport tuner and a Blackwing put it at 12.7. Then a professional tune after adding headers, B&B's with the Blackwing put it at 12.3's. With a cam and a tune at that altitude, I would think your car would do at least low 12's.
Sorry, I don't see anywhere in this post where he specifies what tranny he's running.

You might want to point it out for the rest of us.
Reply
Old Jan 1, 2015 | 11:32 PM
  #12  
95rtturbo's Avatar
95rtturbo
Drifting
10 Year Member
 
Joined: Nov 2011
Posts: 1,377
Likes: 41
From: Chesterfield (St. Louis) MO
Default

Originally Posted by dragls
Sorry, I don't see anywhere in this post where he specifies what tranny he's running.

You might want to point it out for the rest of us.
1998 a4 coupe

As I, and many others have stated, get a tune. Based on your trap speeds, your car is making stock power basically.

Last edited by 95rtturbo; Jan 1, 2015 at 11:38 PM.
Reply
Old Jan 2, 2015 | 01:12 PM
  #13  
Rob Petyo's Avatar
Rob Petyo
Le Mans Master
Veteran: Navy
25 Year Member
Liked
Community Favorite
 
Joined: Mar 1999
Posts: 6,029
Likes: 85
From: Palm Coast, FL
Default

I think ... (not a mechanic) you have a bottleneck with your air somewhere and are not feeding the cam besides some tuning but what do I know?
Reply
Old Jan 21, 2015 | 12:08 AM
  #14  
pharestutt's Avatar
pharestutt
Thread Starter
Instructor
10 Year Member
 
Joined: Nov 2010
Posts: 241
Likes: 0
Default

I went again yesterday and ran 12.7 with alot of knock retard seems better thought.
Reply
Old Jan 21, 2015 | 09:01 AM
  #15  
95rtturbo's Avatar
95rtturbo
Drifting
10 Year Member
 
Joined: Nov 2011
Posts: 1,377
Likes: 41
From: Chesterfield (St. Louis) MO
Default

Originally Posted by pharestutt
I went again yesterday and ran 12.7 with alot of knock retard seems better thought.
If I were you, instead of running your car at the track with seemingly obvious tune issues, I would get a tune first. Your car isn't going to just fix itself.
Reply
Old Jan 21, 2015 | 10:40 AM
  #16  
Blu's Avatar
Blu
Melting Slicks
10 Year Member
 
Joined: Dec 2005
Posts: 2,074
Likes: 0
From: Charlotte NC
Default

You are doing more harm than good running your car untuned with all those mods. There is a reason it is running like crap, it needs a tune.
Reply
Old Jan 21, 2015 | 11:10 AM
  #17  
pharestutt's Avatar
pharestutt
Thread Starter
Instructor
10 Year Member
 
Joined: Nov 2010
Posts: 241
Likes: 0
Default

Originally Posted by Blu
You are doing more harm than good running your car untuned with all those mods. There is a reason it is running like crap, it needs a tune.
I am Tuning my own car im taking it to the track to log my problems and fix them.

Last edited by pharestutt; Feb 13, 2015 at 10:47 AM.
Reply

Get notified of new replies

To slow times why????

Old Jan 21, 2015 | 11:43 AM
  #18  
Stroker87's Avatar
Stroker87
Melting Slicks
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Feb 2014
Posts: 2,725
Likes: 149
From: chicago area IL.
Default

I think the lack of info on your part is the reasons for the response you are getting, if your tuning your car then you should know from the logs why you ran a slow time and work on correcting it.

every one here was just trying to point you in the right direction since you never mentioned any thing about tuning and was asked a few times if it was tuned after the cam install, had you posted more info and details you probably would have got better responses
Reply
Old Jan 21, 2015 | 11:59 AM
  #19  
pharestutt's Avatar
pharestutt
Thread Starter
Instructor
10 Year Member
 
Joined: Nov 2010
Posts: 241
Likes: 0
Default

Originally Posted by Stroker87
I think the lack of info on your part is the reasons for the response you are getting, if your tuning your car then you should know from the logs why you ran a slow time and work on correcting it.

every one here was just trying to point you in the right direction since you never mentioned any thing about tuning and was asked a few times if it was tuned after the cam install, had you posted more info and details you probably would have got better responses
I understand that and most were giving me good suggestions. Because when I first posted I didn't have any KR on those runs but as I was tweaking the tune I ran into some on that run. Was just reporting back that I was seeing better times wasn't trying to offend anyone
Reply
Old Jan 21, 2015 | 12:44 PM
  #20  
Blu's Avatar
Blu
Melting Slicks
10 Year Member
 
Joined: Dec 2005
Posts: 2,074
Likes: 0
From: Charlotte NC
Default

Originally Posted by pharestutt
I am Tuning my own car im taking it to the track to log my problems and fix them.
I dont need the smart comments about how im running my car..... how will i fix or even see the problem if i dont run and log it? Im learning to tune and if i damage my car in the process its my fault i will fix it.
i came here for help some people understand but others just want to talk crap im 19 and it seems like you guys are acting childish.
It is not a smart comment its the truth. Beating the daylights out of your car at the track is not the way to learn to tune it when you are a beginner.

Including this part in your original post would have sort of answered your own question. It's running slow because you made major changes and the car is not getting the proper tuning it needs to benefit from the modifications. MPH tells more about how the car is running over ET at these power levels.

What software are you using to tune the car with?
Reply



All times are GMT -4. The time now is 07:43 AM.

story-0
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-1
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-2
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-3
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-4
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-5
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-6
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-7
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-8
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-9
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE