C6 Tech/Performance LS2, LS3, LS7, LS9 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

A4 stealth mod?

Thread Tools
 
Search this Thread
 
Old Jul 26, 2007 | 07:46 PM
  #1  
UNKNOWN's Avatar
UNKNOWN
Thread Starter
Banned Scam/Spammer
 
Joined: Mar 2005
Posts: 36,473
Likes: 8
From: FLA
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16-'17
Default A4 stealth mod?

have 315 a4

may go with 373


1 who's done it?

2 anyone with headers do it? (more drone issues)?

3 Invisible to dealer?

comments
Reply
Old Jul 26, 2007 | 10:50 PM
  #2  
Tommy D's Avatar
Tommy D
Le Mans Master
10 Year Member
St. Jude 10 Year Donor
 
Joined: Aug 2004
Posts: 5,259
Likes: 16
From: Monroe Township New Jersey
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16
St. Jude donor in memory of jpee '14
Default

DennisNJ50 has 3.73 gears in his A4 you should send him a PM
Reply
Old Jul 27, 2007 | 12:23 PM
  #3  
Big Ron 77's Avatar
Big Ron 77
Burning Brakes
 
Joined: Apr 2005
Posts: 1,115
Likes: 0
From: Dallas TX
Default

Mechanically invisible to the dealer, yes.

However, you will have to reprogram the TCM for shift points, and you can't hide that. Of course, it will probably only come up if you have a shifting/tranny problem!
Reply
Old Jul 28, 2007 | 11:31 AM
  #4  
UNKNOWN's Avatar
UNKNOWN
Thread Starter
Banned Scam/Spammer
 
Joined: Mar 2005
Posts: 36,473
Likes: 8
From: FLA
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16-'17
Default

Originally Posted by Big Ron 77
Mechanically invisible to the dealer, yes.

However, you will have to reprogram the TCM for shift points, and you can't hide that. Of course, it will probably only come up if you have a shifting/tranny problem!
guys with headers===== and a4====with 373 or 410

do you spend more or less time in the drone zone rpm with the 373/410 vs. 315? ( during normal driving conditions).
Reply
Old Jul 28, 2007 | 12:27 PM
  #5  
dennis50nj's Avatar
dennis50nj
Race Director
10 Year Member
 
Joined: Mar 2005
Posts: 11,549
Likes: 27
From: Southampton NJ
Default

Originally Posted by blznsdl
guys with headers===== and a4====with 373 or 410

do you spend more or less time in the drone zone rpm with the 373/410 vs. 315? ( during normal driving conditions).
i think you are never in the drone zone because you rpm higher.
i have the kooks lt an highflow cats corsa sport 3800 rpm converter and 373 with shorter bfg drs and its an a4 sounds great at every rpm i dont hear any drone
Reply
Old Jul 28, 2007 | 01:56 PM
  #6  
UNKNOWN's Avatar
UNKNOWN
Thread Starter
Banned Scam/Spammer
 
Joined: Mar 2005
Posts: 36,473
Likes: 8
From: FLA
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16-'17
Default

Originally Posted by dennis50nj
i think you are never in the drone zone because you rpm higher.
i have the kooks lt an highflow cats corsa sport 3800 rpm converter and 373 with shorter bfg drs and its an a4 sounds great at every rpm i dont hear any drone

switching to pm
Reply
Old Jul 29, 2007 | 11:54 AM
  #7  
debmwb's Avatar
debmwb
Burning Brakes
 
Joined: Nov 2004
Posts: 1,028
Likes: 0
From: Fort Worth Texas
Default

I put 3.42's in my A4 C5 and loved 'em (I started with 2.73's so it was a big change).

From 3.15's the 3.73's should be a good boost!
Reply
Old Jul 29, 2007 | 06:22 PM
  #8  
hiznhrz's Avatar
hiznhrz
Drifting
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Feb 2005
Posts: 1,561
Likes: 75
From: Maryland
Default

When I talked with Chuck CoW about 4:10 gears for my 2005 A4 he said that he recommends 3:90 gears for the A4. He also said he has done a number of them. I won't pretend to share expertise that I don't have so I'LL simply recommend that you speak with Chuck. He is known coast-to-coast when it comes to C5 and C6 Corvette rear differentials. Do yourself a favor and talk with him before you make a decision.

Best of luck.
Reply

Get notified of new replies

To A4 stealth mod?

Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

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

 Joe Kucinski
story-1

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

 Verdad Gallardo
story-2

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

 Joe Kucinski
story-3

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

 Verdad Gallardo
story-4

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-5

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

 Michael S. Palmer
story-6

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

 Joe Kucinski
story-7

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

 Michael S. Palmer
story-8

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

 Joe Kucinski
story-9

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski




All times are GMT -4. The time now is 04:54 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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
story-8
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE
story-9
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE