wheelspin ?

indy · Aug 30, 2003

i HAVE 325is 2.5 litres 24 valves ..1992 automatic .. i try to make wheelspin on dry road ,but the car can not make it .. but on the wet road it not a problem is it normal ??

and can someones tell me about the performance ships .. is it really worth it? there is a real difference whit those ships ?? thank you..

Marinakorp · Sep 3, 2003

First question is WHY are you trying to purposefully do that?

that is either a testament to how grippy your tires are or how anemic your motor is...

That being said, I have the v8 motor in my car... I can almost rotate the tires on command in the wet... in the dry - a little harder to rotate

1 - get bald tires - will be able to rotate until your hearts content
2 - get a stick shift - also should be able to rotate a little easier
3 - get narrower tires... should rotate pretty easily

WHY OH WHY do you want to place additional stress on your driveline, tires (will reduce the longevity), transmission, etc... WHY? WHat harm did your car EVER do to you to deserve this punnishment?

Perf chips are worth the $$... generally will feel more with a stick.. but in the auto you should notice an improvement in HP

Wadula · Sep 3, 2003

indy, it is normal that in wet tires tend to spin easier than on dry road. the wet road has way less friction and grip that is why it takes less power to get the tires spinning.

the problem of your automatic is, that the "clutch" can not be influenced by you. the 2.5 l engine does not have enough torque at the lowest to lower region of the rpm's to get the tires spinning. the torque converter, starts distributing power to the wheels right from the start of the rpm's. the car gets moving immediatly. now, if the engine is too weak, the car is already moving when enough torque is produced which ends up in acceleration and not spinning.
a manual shifted 2.5 would need to be reved high and jumped of the clutch to spin. then all the high power output gets to the wheels in a fracture of a second and that makes the wheels spin.
only with really enough power an automatic is able to solve that gap.

demq · Sep 3, 2003

Wadula is completely right, I just want to give some depth to the explanation...
In ideal, the wheel shouldn't speen at all to get the maximum possible acceleration, cause when they start to slip the friction force which pushes your car forward actually goes down !
So don't warry about it much. To get the wheels spined the torque that is applied to your wheels by driveline should exceed the maximum friction force between your tires and pavement * the radius of your wheels, so you get the maximum torque at the 1-st gear,
and high revving your engine and dropping the clutch means that you produce high torque at your engine + transferring the angular momentum of the engine+flywheel in a short time to the drivelin and wheels, which gives you a high torque pick (the torque is equal to the speed of the angular momentum change)... You cannot high rev the eingine and drop the clutch on your car since it is automatic, so you need to either decrease the radious of yur wheels, i lower the friction force between your tires and the pavment(which happens on wet road), or increase the torque produced by your engine, since the max torque of your engine only is not hogh enough to spin the wheels(get a v8, no wait get better a v12 , or W16 [rofl]

)...
Mine is 87 325e, and to get a wheelspin on a very good set of tires on 14" rims I need to get to about 3000 rpm and drop the clutch. On my previous set I could rev lower, and the sh*t was spining in the rain all the time so I had to take of on 3-rd gear.. [xx(]

Hope this helps you... [wave]

mikev · Sep 4, 2003

Answer is load up the tourqe converter by stepping on the brake and throttle at the same time rev it up to your desired rpm and let go of the brake at the same time punching the throttle even more should see you burning rubber right into the tree round the corner [xx(]

this WILL ruin your car but hey its your cash and your rubber that your burning/Tourque converter your wearing out/Drive train wearing out/Brakes your wearing out/ Life your putting at risk/Diff your wearing out. hmm

Oh FYI you have more than enough power to spin even 17" rims with anything upto 225 rubber on the rear.

BMW-M-Freak · Sep 4, 2003

I think what everyone is trying to say that it's really not a great idea, and i have to agree. Why wheelspin? That a thing people did to old muscle cars, or a burnout comp for ricers.....and thier S*** gets F***ed up when they do it.

But the chip isn't a bad idea. just don't expect the wheels to spin more b/c you got a chip. Like most performance mods, chips make their best gains at high revs.

mikev · Sep 4, 2003

guys some people just want to its not a good idea but indy just wanted to know how after all the best starts come from slightly spinning the wheels (look at all launch control systems in road cars and all starts at the GP) even a 316 can burnout. if you only do it once in a blue moon it wont hurt that much if your car is in good con. when you feel like madness then above is how to do it in an auto. you DON'T need more power than you have to do it.

M-Punk · Sep 10, 2003

I got into my 320i when it was still in one piece and spun rubber in all five gears !!!

Then I discovered that I was on some cat shit!

carcus · Sep 16, 2003

Spinning the tires is not a good thing unless you are on a track with slicks to heat them up. Brake torque is definately not good for the brakes or transmission. Cops will also nail you with a good ticket for Exibition of Speed. You can make any car burn out, even a Yugo. Not good on an automatic, hard on a clutch also. It is all fine and dandy until the torque converter craps on you or the trans. A few seconds of wheel spin sounds cool.....until something breaks.....especially if your friends are watching. Just my 2 cents. [;)]

CTBMW · Sep 21, 2003

Re; Spinning tires: Sell BMW to somepne who will not noticed an abused, good car- and buy a Honda like the rest of your friends.
Just thinking out loud-sorry, new here.
-Mel

dsobering47 · Sep 22, 2003

i am much more interested in the wheelspin which occurs when i shift perfectly and keep the gas to the floor.....only at the drag strip of course..............other than that, if you burnout you are stupid. All that it does is signify how little you know of an automobile and illustrates how you like to buy new tires/parts for your perfectly engineered car. Sorry, i ramble when i type [thumb]

frolf · Sep 22, 2003

wheel spin is a good thing when launching. tires are meant to be replaced, so my outlook is that either i'm going to have a sweet set of tires for an avg. time if i have a lot of fun with them, or i'm going to have a sweet set of tires for a while, and not have fun with them cause i don't exercise my car.

the only thing i worry about is my clutch. but once i replace that in 10-15k i'll be chirping in pleasure once again.

dsobering47 · Sep 23, 2003

i had a very sarcastic tone to what i was typing.....i admit i do burnout sometimes, and according to my previous statement, i am stupid. But oh well, nobody is perfect [thumb]

carcus · Sep 23, 2003

frolf said:

It is alot easier to do without brake torque on a manual, also....alot cheaper to replace a clutch than a automatic transmission. [;)]

skandalous · Sep 23, 2003

Oh man, do i know about bad auto transmissions. After a week of having my car, i hit a curb and broke the transmission seal, causing my trany to die. The a year later it broke, but was under warranty. I've learned not to hot dog in my auto. Bad news.

BTW, Carcus, isn't the seventh circle of hell for those who commit crimes of violence and fraud? Is there something we need to know about you? [;)]

carcus · Sep 23, 2003

skandalous said:

I am a Military Instructor stationed in Mississippi......I am in hell......LOL.
My BMW driving on the beach with the top down keeps me sane.... [;)]

skandalous · Sep 23, 2003

Gotcha. I drive through Mississippi when I'm heading home from school. I feel ya. Not much there.

carcus · Sep 23, 2003

Well....Biloxi is not that bad though. Hey, I am origionally from Cali.....besides the humidity...WHICH SUCKS....and the hurricanes....it is not really that bad, the thing that sucks, closest BMW dealer is in ALabama if something really goes wrong. [:(!]

samlee4444 · Sep 29, 2003

Hey Indy,

Just pop that baby in neutral, floor the throttle and then drop the the gear into drive. I guaranted you'll get a nice wheelspin going on that automatic.

You'll wreck your car, but at least the chicks will be checking you out as plumes of smoke rise from your tires. [rofl]

[headbang]

carcus · Sep 29, 2003

LOL....they will think it is cool until the trans goes pop and the car does not move. Won't look cool then. [xx(]

wheelspin ?

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