How does your C5 accelerate?
Thread Starter
Burning Brakes
Joined: Jun 2005
Posts: 896
Likes: 1
From: Ewing NJ
Originally Posted by Billy182
Just curious, what did the dealer tune consist of? Just plugs and wires? De-carbon top clean? Fuel injector clean? Fuel filter?
It sounds like something is amiss with the engine performance diagnosis. Did a competent tech take it for a test drive?
It sounds like something is amiss with the engine performance diagnosis. Did a competent tech take it for a test drive?
Thread Starter
Burning Brakes
Joined: Jun 2005
Posts: 896
Likes: 1
From: Ewing NJ
My accountant has a ZR1 and my mortgage broker has a '65. I'll give them a test ride and see what they think. They're both responsible for giving me the impetus to buy the car. Nice friends to have around. 
Pro
Joined: Dec 2003
Posts: 502
Likes: 1
From: Fountain hills AZ
Originally Posted by Frozenfire
Good morning all. I have a question about how a 2000 (vert) should respond when you get on it. Should there be a smooth, uninterrupted acceleration, or does the C5 have some quirks? Mine came with Magna Flows and a K&N air filter and was recently given a tune up by a dealer (I know some of you hate dealers, but I bought a GM extended warranty.)
The reason I ask is because when I go full throttle in 1st or especially 2nd, I can feel a sort of "stepped" acceleration rather than a linear one. What're your thoughts?
The reason I ask is because when I go full throttle in 1st or especially 2nd, I can feel a sort of "stepped" acceleration rather than a linear one. What're your thoughts?
Drifting
Joined: Jun 2002
Posts: 1,847
Likes: 1
From: Iowa
Cruise-In IV Veteran
Cruise-In V Veteran
Originally Posted by Frozenfire
Good morning all. I have a question about how a 2000 (vert) should respond when you get on it. Should there be a smooth, uninterrupted acceleration, or does the C5 have some quirks? Mine came with Magna Flows and a K&N air filter and was recently given a tune up by a dealer (I know some of you hate dealers, but I bought a GM extended warranty.)
The reason I ask is because when I go full throttle in 1st or especially 2nd, I can feel a sort of "stepped" acceleration rather than a linear one. What're your thoughts?
The reason I ask is because when I go full throttle in 1st or especially 2nd, I can feel a sort of "stepped" acceleration rather than a linear one. What're your thoughts?
On my A4 '04 coupe, when I "mash it" from a standstill (with the TC off), it DOES kind of accelerate slower than when it finally reaches about 3200 RPM, where THEN it begins to accelerate much faster.
FAR from being "linear", in my opinion.
Now, of course, those with 3.42 and 3.73 gears will not have as much, if any at all, of this low RPM lag, and will spout off that THEIR ride is completely linear in acceleration.
I've found that stock or near stock vettes with 2.73 and 3.15 gears are no where near "linear" in their acceleration curve. And all the "tuning" in the world isn't going to alleviate the "problem".
But then again, what the hell do I know, right?
Race Director
Joined: Apr 2002
Posts: 11,485
Likes: 1
From: Far side of the Moon
CI 4-5-6-7-8 Veteran
St. Jude '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-16-'17
Maybe you can check out the NE Events section and meet up with some CF folks and go for a ride in their Vette and/or have them ride in your ride and see if it seems O.K.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Thread Starter
Burning Brakes
Joined: Jun 2005
Posts: 896
Likes: 1
From: Ewing NJ
Originally Posted by Cole
Turn off Traction control. Run it in competitive driving mode which cab save you in a skid but shuts off the TC. When I upgrade my intake, I found the TC inhibited acceleration.
Drifting
Joined: Aug 2004
Posts: 1,360
Likes: 1
From: Kemah Texas
Originally Posted by Cole
Turn off Traction control. Run it in competitive driving mode which cab save you in a skid but shuts off the TC. When I upgrade my intake, I found the TC inhibited acceleration.
Found this to be true with my stock A4 with 2.73 gears.
Race Director
Joined: Nov 1999
Posts: 12,952
Likes: 0
From: Greer SC
Cruise-In II Veteran
Originally Posted by MagikDraggin
I've found that stock or near stock vettes with 2.73 and 3.15 gears are no where near "linear" in their acceleration curve. And all the "tuning" in the world isn't going to alleviate the "problem".
But then again, what the hell do I know, right?
But then again, what the hell do I know, right?
You can send out a PCM card & have it re-programmed.
Drifting
Joined: Jun 2002
Posts: 1,847
Likes: 1
From: Iowa
Cruise-In IV Veteran
Cruise-In V Veteran
Originally Posted by Sully C5
That's not exactly true. The PCM program can be modified (especially in the A4) to alter shift-points, down-shiftng, torque-management, fuel to air ratio, increased HP & TQ (in '01 & up there is ~15-20 RW available), etc. Remember, GM programs the car for the average driver, not us Ron Fellows wannabees!
You can send out a PCM card & have it re-programmed.
Turning off the TM might allow a better take off to some degree, but not to the extent that it makes the acceleration linear and not feel that typical surge when the engine finally gets up in the part of the power curve where it actually starts making some serious horsepower.
It is people with head and cam mods, SC's, lower (numerical) gears, high stall converters, that are telling this fellow that all he needs is a "tune" and everything will be "better".
It simply won't be any "better" as far as the non-linear feel (lag) of the acceleration goes...but a tune will provide a nominal overall increase in power output....[/i]once[/i] the Vette gets up some speed and RPM's.
Just my opinion, of course.
Race Director
Joined: Nov 1999
Posts: 12,952
Likes: 0
From: Greer SC
Cruise-In II Veteran
Originally Posted by MagikDraggin
Just my opinion, of course.
But you are entitled to youir opinion. As I am entitled to mine based on my personal experiences & dozens upon dozens of dynos and seeing the impact on the TQ curve, which is what provides your acceleration.
So at best, let's say we agree to disagree!
Melting Slicks
Joined: Jun 2004
Posts: 3,439
Likes: 6
From: Newark, DE
St. Jude Donor '06
Originally Posted by MagikDraggin
I don't suppose anyone gives a rat's butt what I think about this, but what the hell, here goes nothin'...
On my A4 '04 coupe, when I "mash it" from a standstill (with the TC off), it DOES kind of accelerate slower than when it finally reaches about 3200 RPM, where THEN it begins to accelerate much faster.
FAR from being "linear", in my opinion.
On my A4 '04 coupe, when I "mash it" from a standstill (with the TC off), it DOES kind of accelerate slower than when it finally reaches about 3200 RPM, where THEN it begins to accelerate much faster.
FAR from being "linear", in my opinion.
1. Torque Management (different from Traction Control) can cause a very noticeable "stumble" if you whomp on it from a standstill or slow roll.
2. The stock torque converter can make accelleration from the bottom of 2nd painfully slow if you are too fast for the transmission to downshift but too slow to have the revs up. You have to wait for the rpm to climb into the power band.
I no longer have these issues... I have different ones now. 2. The stock torque converter can make accelleration from the bottom of 2nd painfully slow if you are too fast for the transmission to downshift but too slow to have the revs up. You have to wait for the rpm to climb into the power band.
Burning Brakes
Joined: Mar 2006
Posts: 1,195
Likes: 25
From: Tacoma WA
What i mean by linear, is that the horsepower increases at a steady rate with RPMs. So that when accelerating it gets more and more powerful steadily. Starting from relatively weak, and ending at ridiculous. I don't feel any real jumps in power, just a quick and steady increase. Unlike a honda hitting VTEC at 5800RPMs, you notice a HUGE jump in power within a very short RPM range.
Assuming your car is properly "Tuned" you should see a fairly linear increase in power w/o any large jumps, gaps or spikes. Thats what i mean by linear... I wasn't trying to imply that the car feels as powerful at 1500rpms as it does at 5500rpms... lol
This is a large Jump!
This is a linear increase
Dan
Assuming your car is properly "Tuned" you should see a fairly linear increase in power w/o any large jumps, gaps or spikes. Thats what i mean by linear... I wasn't trying to imply that the car feels as powerful at 1500rpms as it does at 5500rpms... lol
This is a large Jump!
This is a linear increase
Dan
Drifting
Joined: Jun 2002
Posts: 1,847
Likes: 1
From: Iowa
Cruise-In IV Veteran
Cruise-In V Veteran
Originally Posted by LF97C5Vette
What i mean by linear, is that the horsepower increases at a steady rate with RPMs. So that when accelerating it gets more and more powerful steadily. Starting from relatively weak, and ending at ridiculous. I don't feel any real jumps in power, just a quick and steady increase. Unlike a honda hitting VTEC at 5800RPMs, you notice a HUGE jump in power within a very short RPM range.Dan
I understood exactly what you were saying, and at the expense of beating this horse any further, The A4 C5's I have driven are far from "linear" in the straight-line acceleration. There is most definitely a dramatic increase in the power level once the R's get up into the mid 3000 range. So much so that it almost feels like a 75 shot of nitrous just kicked in.
Funny think though, this does NOT show up on the dyno graphs......for all practical purposes, it LOOKS "linear".
However, since having had the cam change, and the Yank SS3200 TC put in, there is no such surge of power like when it was stock. This thing just flat out lifts off and flies when the go-pedal is slammed to the floor...even with the Mickey Mouse 2.73 gears.
For what it's worth.