First time drag racing c6
Thread Starter
Racer
Joined: Apr 2014
Posts: 383
Likes: 11
From: indianapolis indiana
First time drag racing c6
hey guys just got back from taking my 2005 ls2 c6 6sp down the drag strip at the street car take over in Indy. This was my first time in the corvette I've been before but it's been a few years. Anyways I was able muster off a 12.6 at 113 with a 2.1 60ft on street tires (I realize terrible 60ft) but I was making my final pass and I tried to launch the car harder and had the clutch stuck to the floor issue..it did it just that one time and it's the only time it's happened since I've owned the car, drive home fine with me aggressively driving it all the way home. Car has full z06 manifolds-exhaust back and vararam CIA and a crap slp predator handheld tune, so I know it's got more then a 12.6 in it. I plan on going to the drag strip any tips other then changing the fluid to keep it from doing this again? I am going to be taking drag radials this time trying to cut my 60ft down and don't wanna run into this issue again.
Melting Slicks
Joined: Dec 2013
Posts: 2,232
Likes: 315
From: Bridgewater New Jersey
I say not bad for not running recently and getting the feel for your first time in the corvette. 
May want to check the clutch return spring, as they can break. Also, the masters for the clutch have this very same issue with staying on the floor.
I assume that you do know that the 2005 have the weaker diff and with drag radials, I would be cautious on the launch, especially if the rear starts to hop.
May want to check the clutch return spring, as they can break. Also, the masters for the clutch have this very same issue with staying on the floor.
I assume that you do know that the 2005 have the weaker diff and with drag radials, I would be cautious on the launch, especially if the rear starts to hop.
Thread Starter
Racer
Joined: Apr 2014
Posts: 383
Likes: 11
From: indianapolis indiana
I say not bad for not running recently and getting the feel for your first time in the corvette.
May want to check the clutch return spring, as they can break. Also, the masters for the clutch have this very same issue with staying on the floor.
I assume that you do know that the 2005 have the weaker diff and with drag radials, I would be cautious on the launch, especially if the rear starts to hop.
May want to check the clutch return spring, as they can break. Also, the masters for the clutch have this very same issue with staying on the floor.
I assume that you do know that the 2005 have the weaker diff and with drag radials, I would be cautious on the launch, especially if the rear starts to hop.
Thread Starter
Racer
Joined: Apr 2014
Posts: 383
Likes: 11
From: indianapolis indiana
Yeah it wasn't too bad I didn't think I was able to muster a 2.0 60ft but best pass was on the 2.1 all passes were 12.6 or 12.7 car was getting faster each pass but was only able to make 5 passes in 6hrs unfortunately they have major priority to the single digit race cars
Thread Starter
Racer
Joined: Apr 2014
Posts: 383
Likes: 11
From: indianapolis indiana
Pro
Joined: Jan 2012
Posts: 580
Likes: 15
DO NOT PUT DRAG RADIALS on a 2005 stock rearend 
Save up and replace that rear diff asap if you plan to drag your car.
I have a broken 05' diff in the corner of my garage from a spirited launch on street tires. Closest corvette shop to me has a huge pile of broken 05' diff's out behind their shop.
Save up and replace that rear diff asap if you plan to drag your car.
I have a broken 05' diff in the corner of my garage from a spirited launch on street tires. Closest corvette shop to me has a huge pile of broken 05' diff's out behind their shop.
Thread Starter
Racer
Joined: Apr 2014
Posts: 383
Likes: 11
From: indianapolis indiana
DO NOT PUT DRAG RADIALS on a 2005 stock rearend
Save up and replace that rear diff asap if you plan to drag your car.
I have a broken 05' diff in the corner of my garage from a spirited launch on street tires. Closest corvette shop to me has a huge pile of broken 05' diff's out behind their shop.
Save up and replace that rear diff asap if you plan to drag your car.
I have a broken 05' diff in the corner of my garage from a spirited launch on street tires. Closest corvette shop to me has a huge pile of broken 05' diff's out behind their shop.
Thread Starter
Racer
Joined: Apr 2014
Posts: 383
Likes: 11
From: indianapolis indiana
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
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
Instructor
Joined: May 2015
Posts: 229
Likes: 22
From: NJ
DO NOT PUT DRAG RADIALS on a 2005 stock rearend
Save up and replace that rear diff asap if you plan to drag your car.
I have a broken 05' diff in the corner of my garage from a spirited launch on street tires. Closest corvette shop to me has a huge pile of broken 05' diff's out behind their shop.
Save up and replace that rear diff asap if you plan to drag your car.
I have a broken 05' diff in the corner of my garage from a spirited launch on street tires. Closest corvette shop to me has a huge pile of broken 05' diff's out behind their shop.
Melting Slicks
Joined: Dec 2013
Posts: 2,232
Likes: 315
From: Bridgewater New Jersey
I think a lot of people may not have problems with the diff, but I think most are running the A4, being easier on the rear than a MN6.
The clutch master has been updated recently, I believe, may want to check into this if problems are not resolved.
Thread Starter
Racer
Joined: Apr 2014
Posts: 383
Likes: 11
From: indianapolis indiana
DO NOT PUT DRAG RADIALS on a 2005 stock rearend
Save up and replace that rear diff asap if you plan to drag your car.
I have a broken 05' diff in the corner of my garage from a spirited launch on street tires. Closest corvette shop to me has a huge pile of broken 05' diff's out behind their shop.
Save up and replace that rear diff asap if you plan to drag your car.
I have a broken 05' diff in the corner of my garage from a spirited launch on street tires. Closest corvette shop to me has a huge pile of broken 05' diff's out behind their shop.
https://www.corvetteforum.com/forums/c6-corvette-general-discussion/3337970-2005-c6-rear-end-differential-failures.html
seems like it's not a giant problem def something to worry about, seems like as long as your careful about it and not making monster power you'll be fine. Gonna run 555r nitto drags
Instructor
Joined: Dec 2016
Posts: 209
Likes: 42
From: Chestertown Maryland
Instructor
Joined: Mar 2010
Posts: 201
Likes: 14
From: Flower Mound Texas
https://www.corvetteforum.com/forums/c6-corvette-general-discussion/3337970-2005-c6-rear-end-differential-failures.html
seems like it's not a giant problem def something to worry about, seems like as long as your careful about it and not making monster power you'll be fine. Gonna run 555r nitto drags
seems like it's not a giant problem def something to worry about, seems like as long as your careful about it and not making monster power you'll be fine. Gonna run 555r nitto drags
Thread Starter
Racer
Joined: Apr 2014
Posts: 383
Likes: 11
From: indianapolis indiana
Melting Slicks
Joined: Dec 2013
Posts: 2,232
Likes: 315
From: Bridgewater New Jersey
Pro
Joined: Jan 2012
Posts: 580
Likes: 15
I put in a zip performance 2006+ stage 3 with quaife, all parts rem polished and cryogened and an ECS bracket... this is the extreme upgrade, around $4k...
Later had RPM transmissions machine the diff pinion out to larger spline for my RPM stage 6 with z06 output transmission...
I would just recommend a stage 1 or stage 2 2006+ from RPM transmissions for most 2005 owners...
Later had RPM transmissions machine the diff pinion out to larger spline for my RPM stage 6 with z06 output transmission...
I would just recommend a stage 1 or stage 2 2006+ from RPM transmissions for most 2005 owners...