[S4to335]

been noticing that when I accelerate out of turns..that my rear end is losing grip more. This is partly because of some 100 octane gas, partly because tire tread is wearing down in the back, and partly because of some other undisclosed reason (you can guess), anyway...its starting to bug me..yes the car can rotate faster..but it also ends up spinning rather than actually accelerating. Coming from the Audi side of the camp..and having quattro..I never had this problem. Any one else have this issue? I am really reconsidering the LSD again. Ugh.

[visor]

You may need a new set of rear tires if they're quite worn.

Otherwise, have you tried reducing the rear tire pressures or similarly increasing the fronts? This may help in balancing your oversteer. But really, you're probably gassing it too early in your turns. (You can do this with Quattro/AWD, but not with RWD, especially with this much torque.) Try entering the turn's apex a little later, then gas it (ie. gassing it later in the turn AFTER your front wheels have past the apex). Then your rear wheels will be mostly pointing down the straightaway when you apply the power.

[V1.47fan]

I got my car back to stock and quit using 98 octane fuel for this reason,now i have better throttle control as a result Also check your rear camber.
There's a reason why the M3 torque is limited to 295 which is hard to achieve with a 414 hp engine.

[O-cha]

Since you track experienced LSD might be good, but for the average guy it's going to make them rotate more.

[sayemthree]

trade your car for a new M3.

[O-cha]

Originally Posted by V1.47fan

There's a reason why the M3 torque is limited to 295 which is hard to achieve with a 414 hp engine.

That's a pretty ignorant thing to say, just because it puts 275 down on a dyno doesn't mean a dam thing.

The m3 puts out a hell of a lot more torque to the ground then a stock 335 or even a mildly tuned one.



You left out the 8+k redline and the increased gearing that comes with it .

[gos]

Originally Posted by visor

Otherwise, have you tried reducing the rear tire pressures or similarly increasing the fronts? This may help in balancing your oversteer.

I think this might be backwards... higher pressure in the front should increase oversteer, not decrease it, no?

More pressure usually results in more grip, so adding 1-2psi in the rear and/or dropping 1-2psi in the front might help.

[Ikarus]

Originally Posted by gos

More pressure usually results in more grip, so adding 1-2psi in the rear and/or dropping 1-2psi in the front might help.

It's the opposite. More pressure -> less friction, i.e. less grip. I really think the only valid solution here is getting new rear tires.

[LOLrance]

IIRC, your running a square setup. Why not just go staggered to get more contact patch to the ground?

[alan93rsa]

If you had double adjustable shocks you could soften the bump and increase the rebound in the rear. That should tend to hold the rear down a bit in the corner.

[V1.47fan]

Originally Posted by O-cha

That's a pretty ignorant thing to say, just because it puts 275 down on a dyno doesn't mean a dam thing.

The m3 puts out a hell of a lot more torque to the ground then a stock 335 or even a mildly tuned one.



You left out the 8+k redline and the increased gearing that comes with it .

A car producing 370 lb-ft of torque will be more difficult to control than one producing 295 lb-ft without traction control.Cars with high torque tend to be tail happy even with a 50/50 weigh distribution.
A tuned 335i on 100 octane produces more torque than a stock M3.
This is why formula one engines produce high hp(+750hp) and low torque (around 295 lbft) at 18.5k rpm.Got it ?

[.:bHd:.]

You guys make no sense at all. The reason why the M3 engine has so little torque is because they're squeezing out 414 hp from a 4 liter engine. The comprassino ratio is very high on it, just like most other M engines, which have little tourqe too, the M3 engine suffers from this.. Why in the world would BMW decrease tourqe? The more the better.

[SteelTorque]

Originally Posted by S4to335

been noticing that when I accelerate out of turns..that my rear end is losing grip more. This is partly because of some 100 octane gas, partly because tire tread is wearing down in the back, and partly because of some other undisclosed reason (you can guess), anyway...its starting to bug me..yes the car can rotate faster..but it also ends up spinning rather than actually accelerating. Coming from the Audi side of the camp..and having quattro..I never had this problem. Any one else have this issue? I am really reconsidering the LSD again. Ugh.

That is exactly why I went to AWD this time and I love not having to worry about spinning 360 degrees if I make a mistake or if there is no traction while cornering, bad weather etc.

So much easier to recover with AWD and very confident. So far I wasn't able to induce oversteer, only slight understeer.

I only wish the car was a little lighter, but other than that I have no regrets whatsoever.

[-=Hot|Ice=-]

Originally Posted by O-cha

That's a pretty ignorant thing to say, just because it puts 275 down on a dyno doesn't mean a dam thing.

The m3 puts out a hell of a lot more torque to the ground then a stock 335 or even a mildly tuned one.



You left out the 8+k redline and the increased gearing that comes with it .

I think it does.

[AndrewAZ]

First off a lot of you guys are lost... An engine does not make horsepower, it only makes torque.. Horsepower is derived mathematically from torque..

The equation for HP= Torque times RPM / 5252..

The M3 makes a lot of HP due to high RPM's.

[dougman]

Originally Posted by visor

Otherwise, have you tried reducing the rear tire pressures or similarly increasing the fronts? This may help in balancing your oversteer.

Ummm, don't do this. It's the opposite of what you want.

Increasing tire pressure decreases the tire slip angles under lateral load.

To increase understeer (or decrease oversteer): decrease front PSI; increase rear PSI.

My guess is that you've gotten used to a lot of understeer in the Audi. BMW tunes their cars for much less understeer than most companies. Understeer is always safe, but it's not very exciting and not the fastest way around the corner. Lack of understeer is one of the main reasons I'm in a BMW (I'm a former Ford vehicle development engineer).

But if you still don't like it you can also increase the front sway bar diameter (or decrease the rear).

I would do as others say and first try the staggered tire setup.

And don't forget that once you're full loaded up in the turn, the throttle steers the car as much--or more--than the steering wheel.

[exo-ak-dk]

1. did you notice you do drive a RWD
2. The audi you had was AWD and this is NOT
3. A bmw AWD would smoke the audi

[longodj]

a) why are people talking about the m3 in this thread?

b) either drop pressure in front and increase pressure in rear, or go staggered. Maybe some front sways are in order?

[stressdoc]

Guys, try not to insult S4to335's car savvy. He knows a lot about tire pressure etc. Remember that we are talking racing here.

[galahad05]

Okay, I said this before, I'll say it again.

I test drove an M3 recently, black, 4-door sedan. Ended up taking it out during rush hour, so I unfortunately got to feel how it did in stop-and-go (read: lower RPMs). It was underwhelming.

My 335 felt lots stronger at lower RPMs. This is from the higher torque.


Only once at the end of the test drive did I have a chance to open it up when the road ahead cleared. It felt about like my car around 4k RPM, and it started to feel stronger than mine around 5k RPM.


The 335 has more torque down low, at least according to the way the two cars felt at lower RPMs.

[longodj]

Originally Posted by stressdoc

Guys, try not to insult S4to335's car savvy. He knows a lot about tire pressure etc. Remember that we are talking racing here.

I am not insulting his car savvy as much as assuming his knowledge of driving. He knows he's driving a RWD car and thus knows he can't mash the throttle too early. Just offering the knowledge I have (very little).

[Ikarus]

Originally Posted by SteelTorque

That is exactly why I went to AWD this time and I love not having to worry about spinning 360 degrees if I make a mistake or if there is no traction while cornering, bad weather etc.

Well, I guess this AWD driver must have thought the same...

This is an Audi R8 losing it at Virginia International Raceway.