Question re: tire spin
Le Mans Master
Joined: Sep 2004
Posts: 5,707
Likes: 4
From: Los Angeles
Originally Posted by MagikDraggin
I have a 3 month old 2004 coupe with the A4 and 2.73 gears. This may sound odd, but it will only squeal the tires a little off the line and no chirp with the 1-2 shift at wide open throttle.
HOWEVER, at half throttle, it will spin the tires off the line as well as chirp the tires on the 1-2 upshift. Go figure that one!
And by the way, it is not so much horsepower that spins the tires off the line as it is torque. Also, at the rear wheels, your stock vette is probably only putting around 285-290 ponies to the pavement. That 350 figure is figured at the crankshaft.
What the 3.15's and 3.42 gears do, is get the rpms up more into the "power range" quicker where that power really is. Same with a higher stall torque converter.
Welcome to the forum, also. Don't forget to wave
HOWEVER, at half throttle, it will spin the tires off the line as well as chirp the tires on the 1-2 upshift. Go figure that one!
And by the way, it is not so much horsepower that spins the tires off the line as it is torque. Also, at the rear wheels, your stock vette is probably only putting around 285-290 ponies to the pavement. That 350 figure is figured at the crankshaft.
What the 3.15's and 3.42 gears do, is get the rpms up more into the "power range" quicker where that power really is. Same with a higher stall torque converter.
Welcome to the forum, also. Don't forget to wave
Sometimes a little less throttle will chirp the tires off the line because it occurs before the weight transfer of the car increases the traction. Full throttle throws the front end up and shifts the weight to the rear which makes it harder to slip the tires but this is a good thing.
Last edited by robvuk; Nov 3, 2004 at 01:01 PM.
Thread Starter
6th Gear
Joined: Nov 2004
Posts: 6
Likes: 0
thanks for the replies...good info...was more curious than anything else...don't think the 3.15 axle is worth it for me...since I don't intend to do burnouts on a daily basis...I was just surprised it didn't do it more than anything else....regards.
Racer
Joined: Mar 2003
Posts: 310
Likes: 0
Smoke em
I am on my second C5, an 03 and now an o4, both had A4's, neither will spin the tires from a dead stop without using a little brake. I am getting a tune next week from Ed Wright and see if it changes anything. Had the same problem with my 04 Yukon XL with the 8100 engine, but Westers fixed that ! 
Instructor
Joined: Jan 2004
Posts: 241
Likes: 0
From: VA
Originally Posted by 2004vert1
thanks for the replies...good info...was more curious than anything else...don't think the 3.15 axle is worth it for me...since I don't intend to do burnouts on a daily basis...I was just surprised it didn't do it more than anything else....regards.
Drifting
Joined: Oct 2003
Posts: 1,923
Likes: 5
From: San Antonio TX
mn6 here and with bad gas WOT will not spin the tires if i dont drop the clutch. with good gas and easy on the clutch (let the clutch out at 900 rpm then step on it) 300 feet of black lines and lots of smoke. could be fuel related.
More Than Zero
More Than Zero
Supporting Tuner
Joined: Sep 2004
Posts: 51,896
Likes: 39
From: ================== Houston, Texas www.englandgreen.com ================== Necessary Evil™ __________
CI 6-7-8-9-10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14
Originally Posted by M_T_0
mn6 here and with bad gas WOT will not spin the tires if i dont drop the clutch. with good gas and easy on the clutch (let the clutch out at 900 rpm then step on it) 300 feet of black lines and lots of smoke. could be fuel related.
More Than Zero
More Than Zero
2004vert1 has a A4....
Burning Brakes
Joined: Jun 2002
Posts: 1,165
Likes: 1
From: Santa Rosa Beach FL
Originally Posted by Randy's C5
I have an A4 with the performance axle (3.15) and can boil the tires on launch as well as squeal the tires on 1st to 2nd shift (in OD). IMO, this would indicate that 2.73 vs 3.15 is the difference since I have no other "performance mods".
My A4, 3.15 will git'er done!!
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Pro
Joined: Sep 2003
Posts: 668
Likes: 35
From: Lantana, TX
Originally Posted by 2004vert1
I just bought a 2004 (Automatic) vert....from a dead stop, I floored it for the first time yesterday (with traction control OFF) and there was no tire spin (ie, burn out).
I was surprised...assumed there would be massive smoke. But instead nothing but a squeak...
I assume this was done deliberately to give a faster jump off the line...is this correct?
I was surprised...assumed there would be massive smoke. But instead nothing but a squeak...
I assume this was done deliberately to give a faster jump off the line...is this correct?
Welcome! I have the A4-2.73 as well, love cruising with it, mileage is nice, and the low rpm/noise is terrific for a vert. But I don't think there was any deliberately when GM's choose the 2.73's to get them to jump off the line faster. Even though every stock A4 will put down exactly the same hp from a standstill the shorter geared cars will have much more torque applied and so will naturally 'spin' quicker.
I love knowing I can mash the pedal without losing traction, never worrying about whether it'll spin on me or not. But when you want to spin the tires, and if anyone says they've never wanted to then they'll either lying or in a coma... just hold the brake. It's the only way I was able to get mine to do this... old tires
Race Director
Joined: Oct 2004
Posts: 18,401
Likes: 3
From: Retired but working
Cruise-In VI Veteran
My 99 Coupe has 2.73 gears and I have no trouble spinning the wheels at about a 1/4 throttle. I've got to be real careful when I pull out and do a 90 degree onto a street as it breaks loose.
I did play
with a new Blue Z0 on the freeway one night and left him wondering. He followed me to the mall and wanted to see that LPE engine. He liked it. 
I did play
with a new Blue Z0 on the freeway one night and left him wondering. He followed me to the mall and wanted to see that LPE engine. He liked it.
Drifting
Joined: Oct 2004
Posts: 1,283
Likes: 1
From: Monmouth County NJ
I noticed this too.
Then I started to think, The techs designed this car for performance. This means hooking up and going as fast as possible. Tire spin looses time in races. A lot of man hours and technology went in to making these cars "glue" to the road. A good smokey burnout is so cool though.
Burning Brakes
Joined: Sep 2003
Posts: 1,230
Likes: 0
From: baton rouge la
Originally Posted by 2004vert1
so, can anyone definitively confirm that the 2.73 axle is the reason the A4 won't spin tires?...I just find it suprising that with 350 rwhp I can't smoke em...also, it my understanding that the 3.15 axle doesn't add horespower and improves 0-60 by less than 1/4 second...any other A4 owners with 2.73 in the same boat as me????
I was in the same boat as you...............until i dumped the 2.73 shyt gears and installed 3.42's
HUGE difference
Melting Slicks
Joined: Feb 2004
Posts: 3,137
Likes: 1
From: Insane Diego Kalifonya Baby
2.73s turn off traction control apply brakes run her up to about 1500 rpms or alittle more then let off on the brake and punch it she will leave a few dollars worth of rubber on the ground 
Burning Brakes
Joined: Sep 2003
Posts: 1,230
Likes: 0
From: baton rouge la
Originally Posted by 2004vert1
so, can anyone definitively confirm that the 2.73 axle is the reason the A4 won't spin tires?...I just find it suprising that with 350 rwhp I can't smoke em...also, it my understanding that the 3.15 axle doesn't add horespower and improves 0-60 by less than 1/4 second...any other A4 owners with 2.73 in the same boat as me????
I was in the same boat as you...............until i dumped the 2.73 shyt gears and installed 3.42's
HUGE difference
Pro
Joined: Mar 2002
Posts: 632
Likes: 0
From: Enterprise AL
Originally Posted by 2004vert1
I just bought a 2004 (Automatic) vert....from a dead stop, I floored it for the first time yesterday (with traction control OFF) and there was no tire spin (ie, burn out).
I was surprised...assumed there would be massive smoke. But instead nothing but a squeak...
I assume this was done deliberately to give a faster jump off the line...is this correct?
I was surprised...assumed there would be massive smoke. But instead nothing but a squeak...
I assume this was done deliberately to give a faster jump off the line...is this correct?
z06vettepilot
Burning Brakes
Joined: Feb 2004
Posts: 831
Likes: 0
From: Country Boys Can Survive.
Originally Posted by Randy's C5
I have an A4 with the performance axle (3.15) and can boil the tires on launch as well as squeal the tires on 1st to 2nd shift (in OD). IMO, this would indicate that 2.73 vs 3.15 is the difference since I have no other "performance mods".
Welcome to the forum!!!
I have a stock c5 with the 3.15 axle and I "have to be careful" or my stock eagle runflats will spin without provocation when I don't want to "burn rubber". Once it happened right in front of a County Sheriff. He followed me for 3 or 4 miles making me nervous as heck. My wife has unintentionally "burned rubber" while I was with her, (the only time I'll let her drive it). It must be the rear axle that makes the diff!
Safety Car
Joined: Jun 2004
Posts: 4,353
Likes: 22
From: Bella Vista Ca
Originally Posted by I X L R 8
I was in the same boat as you...............until i dumped the 2.73 shyt gears and installed 3.42's
HUGE difference
HUGE difference
I also put a 2800 stall converter in...I can leave 20+ feet of rubber off the line.
Safety Car
Joined: Jun 2004
Posts: 4,960
Likes: 527
From: Witness Protection Program Somewhere, USA
Originally Posted by M_T_0
mn6 here and with bad gas WOT will not spin the tires if i dont drop the clutch. with good gas and easy on the clutch (let the clutch out at 900 rpm then step on it) 300 feet of black lines and lots of smoke. could be fuel related.
More Than Zero
More Than Zero
Here I go again
on wild statements, i.e. bone stock A4 with 2.73 running 12.s, 345 RWHP on stock C5, blah, blah.
