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[QUOTE=Alastor]Although I am relatively new to the board, I know that it is foolish to question [i]Matra et Alpine’s[/i] wisdom. Nevertheless, I have my doubts as to whether or not what the original poster described as a “skittle” is in fact the AL system.
The following link is a video of a Subaru WRC car entering and exiting the equivalent of a hair pin (900Kb avi file).
[url]http://jupiter.walagata.com/w/alastor/WRC.Subaru.Impreza.WRX.zip[/url]
Well before and most of the way through the corner a high pitched squeak (I am assuming this is the “skittle” noise) can be distinctly heard. Upon existing the corner the squeak is no longer present. Once on the straight a pop or bang can be heard during the up-shift, and then several more again at the end of the video (presumably from lifting off the accelerator).
It seems to me that the initial squeaking sounds more like a BOV or similar device. While the popping/banging could be caused by a AL system.
Even though there are not any question marks above, it is a question ;-)[/QUOTE]
i know this is an old post but i just saw it, the only sounds i could make out was tire squeal, bov during the up changes, and the engine itself
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[QUOTE=KnifeEdge_2K1]i know this is an old post but i just saw it, the only sounds i could make out was tire squeal, bov during the up changes, and the engine itself[/QUOTE]
When I watch this video I hear lots of tire squealing also. But during the beginning of the video (0 -> 4 seconds) I hear a 'chirping' sound (I assume this 'chirp' is what the original poster described as a 'skittle'). To me this sounds like a BOV although it differs slightly from the traditional sound. Instead of making the normal "whoosh" it 'chirps' in short intervals. The only time I have heard a BOV make a 'chirping' sound is on a automatic AWD DSM. It is hard to say if the car is decelerating or accelerating during the corner entry so I wont make any assumption about it.
However, after clearing the corner the Subaru is accelerating away from the camera and at least one up-shift takes place. During the up-shift a short pop or rumble can be heard. As well during the initiation of the feint maneuver (~8 seconds) more rumbling occurs I assumed from releasing the accelerator. I was wondering if the rumbling could be caused by a anti-lag system.
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yes my post was wanting to know what that exact chirping/clipping/skittle sound was just as the car is decelerating and maunovering round the corner it made a short sharp/skittle/chirping sounds in very short intervals and stopped soon as the car accelerates again!
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couldn't it be ABS? if they brake hard, you should hear when the brakes go on and off with the skittle noise.
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i don't think rally cars use abs ,lol
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oooo, didn't know you were talking about rally cars, i haven't really followed the thread.
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ha ha na its rally allright , just tring to define what this skittle/chirping sound is comming from , matra originally has said its an anit turbo lag technique so its got to be that!
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yeah, as the car is going into the corner the skittle is most likely the anti lag system keeping the turbo turbine speed up, it sounds like rapid firing roman candles :D
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or a cage full of budjies!!!!
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I took this sound clip from this On Board Camera Tramac Edition 2000 vid.
It is 37 seconds from a Peugeut 206:
[url]http://jupiter.walagata.com/w/alastor/ALS.mp3[/url]
During braking there is a popping/banging noise sounds kind of like rocks bouncing around inside the cockpit. Just wondering if that is the AL system at work?
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yes im guessing thats just the sound of the car repeatidly back firing because of the als