how bad is it? and doesn't ur rev limiter keep u from hurting the car? cuz i think i hit it tontie and i felt my wheels lock up a bit, but i saved it pretty quick, jus wondering how dangerous this could be?
-
-
Lol how did you "Hit It" were you way past redline? you shouldn't actually hit it.. because you should be shifting at redline or just "slightly" past.. -
yea i kinda was in the middle of racing and i downshifted to much or sumthing i dunno i think i zoned out... haha but yea.......i wasnt to excited and now i am looking up racing schoolsComment
-
You're probably fine. Just don't do it to often.Comment
-
Downshifted too much?? What speed were you going and what gear did you go into?Comment
-
Originally posted by ///MMAN
to be honest i dont remember the exact numbers, but i kno i was in 4th gear and i knew shifting to second would be cutting it close, i was expecting to shift there just to get a quick jump then shift to 3rd
now thinking it over i realize i lose more time shifting then i probably would have if i was right about my judgement, but when i went to second it by the time the needle settled to where my revs should be it was deep into redline and i pushed in the clutchComment
-
Is it still running? Not running rough? No funny noises?Originally posted by spez7
What'cha looking at here is called the money shift - except you did it more or less intentionally. Most people do it by accident (trying to go from 4th to 3rd and catching 1st instead, or from 5th to 4th and catching 2nd..
It usually results in some valves being bent, possible piston damage, sometimes in severe cases completely trashing the engine.
It's not a good thing to do. And BMW makes it a bit easy to do since the syncro's on the transmissions are pretty good and don't balk at letting you do something like this - and the mounting of the shift mechanism is such that under pressure - the relationship between the different shift gates changes.
So - that's why the three questions. If no to all of them - you dodged the bullet; if any of them are true - well, you're looking at some $$$ to fix it.
If you are lucky and the answer is NO to all of them - I'd strongly suggest:
1. Quit street racing.. it's dangerous not only to your car but to you. If you're gonna do this sorta thing - do what we did ages ago (I'm way old..) find a deserted stretch of road to do it on. Even then - since you're not wearing the protective gear (like a helmet) - it's a dumb thing to do, but we've all done dumb things so I'm not gonna lecture. I still do dumb things.
2. Spend the money you would have spent fixing the engine learning how to drive. BMW offers driving courses for people of youth (teens..) - it's a performance driving course given with their cars at the tracks they built around the North Carolina factory. Well worth the $$$. Or - join the BMW Car Club of America, and see what your local chapter is doing about driving schools, track days and autocross events. ALL of these are a very inexpensive way to learn to drive a performance vehicle (not that you can't - but everyone can always learn something..) and you'll be doing it in a safe environment, with instructors and the right safety equipment.
OK - off soapbox.. and hope you consider #1 or #2.Comment
-
Forgot to respond to your original question..Originally posted by spez7
The rev-limiter only limits how fast you can make the engine go using the gas-pedal. If you sat in neutral and pressed the pedal to the floor, the rev-limited will keep if from blowing up by keeping the RPM's in a safe range.
The rev-limiter unfortunately cannot do anything about the car forcing the engine to go faster than is safe for it. Which is what happens when you go into too low a gear for the speed you were going. The momentum of the car moving forwards works backwards through the driveline (wheels, rear-end, transmission) to the engine - mechanically forcing it to over-rev. The wheels locking up is a hint that this wasn't a good thing. They should never do that.
The other bad thing about driving this way is you're destroying the driveline. It wasn't designed to take those sort of peak-loads - and the loads will damage things like driveshaft splines, universal joints, guibos..
Driving a performance car SMOOTHLY is much more impressive to me than banging it around from gear to gear. Anyone can do that - driving it smoothly and still extracting the performance it's capable of will make it last longer and shows some real skill in driving.
Rolls-Royce used to have a driving school for drivers of cars it sold.. their goal was to have the driver be able to shift so a passenger would never know they'd shifted, smoothly, no lurch/jerking, matching engine and transmission speeds accurately. The power was supposed to feel seamless. Sort of like a jet rev'ing up.
It's something I've always found enjoyable to do - sort of a challenge to see how smoothly I can drive a car. Doesn't mean pussycatting it - just means trying to be SMOOTH.
But - to each his own.. it's your car and you can do whatever you want to it - just know it just might be expensive.
Best,Comment
-
yes its still running, no funny noises, and well nothing abnormal taht i've noticed.
thanks for the responses they helped
i dotn normally street race, but these two guys followed me back from wendys (a hott spot in my area for street racers) and came up on both sides of me asking if i wanted to race, he bet me 100 dollars and i was jus like "no thank you nto really a street racer" but i gave it a lil go anyways to see what the car had but she didn't really push itComment
-
wheels locking up, not good...Comment
Comment