I'm led to believe that its quite normal, this noise seems to me a bit loud and naff sounding,by the way it was just as loud with standard airbox, is there a way of reducing the noise or stopping it, I'm assuming its the recirc valves making the noise.

Blow off valves will get rid of that sound, but then again,

what sound is more annoying...a sound like one of your tires is leaking air or the howling honk

 

If the noise was the same with the standard airbox, then i would think there was a problem with the airbox, posiibly there is a problem with the wastegate actuators, that is why it is so loud.

IMHO, bov also sound naff, unless you have 600bhp, just keep the noise and get a nice anti-lag system.

 

I think there is a away to get rid of the noise on the dual pop, if you have this I'll give you more info. otherwise I don't know.

 

 

Turn the Radio up and get some decent tunes on - None of that easy listenin shit !

 

I never got Intake honk on my Stock Air Box -did with my K&N which was shit anyway !

 

If that is the noise you are gettin yes it is perfectly normal - but i would check yuo Recircs to be on the safe side !

 

 

 

------------------

Z ya

 

Nico91TT

 

I've installed TurboX's recirculating BOVs and it stopped the honk.

 

Maciej

nico, how do you check the recirc valve out,

I know where they are but what do I need to look for?

Ay3388, get Kazaa and do a search for, and download "Getaway in Stockholm 2" then come and tell me blow off valves sound shite

(and thats on an Escort Cosworth!)

Glen.

 

Hi,

I already did that two weeks ago, 260mb correct?? FYI, i dont like cosworths too, just personal preference, so no one get high and mighty, I'm not the biggest fan of them, I used to have dump-to-air valve, but I prefer the wastegate actuator sound.

Even though the cars are driven by 'professionals' I see they like to let off the accelerator a lot, cos you can hear the dumpvalve working its ass off, not good driving Im afraid, keep the power on and left foot brake, then you keep the suspension loaded up as opposed to inducing lift off oversteer, as well as the fact in a 4wd, when you let off the accelerator, you have no 4wd anymore, cos the wheels arent being powered, thereby negating any advantage you have over rwd.

Anyhoo, if you like dump-to-air then im not going to put a curse on you or send out hitmen on you am I, i'm just not a fan, if you have them, fair enough.

 

edit: By the way senna, your car is really nice. Damn cool.

 

[This message has been edited by Ay3388 (edited 26-12-2001).]

My recirc valves are slient. I can only hear them when the roof is off, no music and I change gear over 5000rpm, and even then its only a slight, Hshhhhh! sound.

 

Some Blow off valves sound ok, but on some cars its surplus to requirment. I was in a Sierra Cosworth that had one but didnt make a Shhh sound. It sounded like when you spin a rope around, and deep.

 

Stuart

Originally posted by Ay3388:

Even though the cars are driven by 'professionals' I see they like to let off the accelerator a lot, cos you can hear the dumpvalve working its ass off, not good driving Im afraid, keep the power on and left foot brake, then you keep the suspension loaded up as opposed to inducing lift off oversteer, as well as the fact in a 4wd, when you let off the accelerator, you have no 4wd anymore, cos the wheels arent being powered, thereby negating any advantage you have over rwd.

 

Interesting view !

 

The benefits of four wheel drive are in longitudinal acceleration only. Any other direction (latitudinal or longitudinal deceleration) does not give rise to any benefit. The reason for this is that regardless of the number of driven wheels, latitudinal forces are exerted on all four wheels and longitudinal deceleration is exerted by the brakes which operate on all four wheels.

 

There are minor exceptions to this in that some highly experienced drivers like to use the accelerator as a form of anti lock while left foot braking but they are in a minority. Having said that Mike Hakinen is one of them.

 

And when left foot braking, you do NOT keep the power on. You feather the accelerator and keep some fuel burning to maintain balance and the turbo spinning. Keeping power on would overheat the brakes very quickly.

 

Keeping the suspension loaded up is not the aim either - 'using' suspension load to help balance the car is valid but it is not possible (or desirable) to actually have the suspension loaded all the time.

OK OK, power on was not the best choice of words, but is it not keeping the 'power on' in the sense of the words? as the power is on to keep the turbo spooling and have the power instantly when the brakes are let off.

The whole point of left foot braking is to have the turbo at full boost for when you let the brakes off.

So if lateral forces are not affected by a 4wd system, why do rear wheel drive cars oversteer easier, and front wheel drive cars understeer easier, yet 4wd offer a more neutral handling, inducing an oversteer or understeer 'as Desired'. (depending on the torque split and of course assuming you are using a proper 4wd system, not HALDEX or some other fake crap)

I think you will find also, that when you let off the accelerator the permanent 4wd system of a cosworth, lancia, audi, subaru etc etc, the 4wd system essentially disengages, i.e. any benefits of having the 4wd are lost as the wheels are being powered, thereby not forcing spin and maintaing the grip, the centre differential only works when being powered, i.e. 'disengages' (or free spins) use when not powered, therefore the way to keep correct delivery of power and grip is to, as you say feather the throttle, but not in the manner the dump valve on the cosworth dictates that was just letting off, as feathering the throttle to me, does not mean letting off and putting on, it means to gently adjust at a more steady level (whilst keeping power enageged and not letting off enough for a dump valve to engage) to maintain a power delivery for the centre diff to do its job.

Also keeping the suspension loaded is again probably a poor choice of words, but in the sense of the words they are correct, hefty weight transfers throwing the car off balance mid corner is not the idea, cos wahey, lift off at the same time as the weight is transferred and you will almost always spin, and in any case go slower round the corner, as you are busy trying to catch the car.

Also, i think you will find, that longitundinal acceleration in a 4wd whilst is improved as there is a noticable lack of wheelspin, isnt exactly why 4wd system in certain cars have taken off, its the fact that they do handle that much better whilst going round coners or straight line in loose surfaces/wet surfaces there is no point in 4wd if the wheels arent being powered or driven!. As the 4wd system provides much more grip than a rwd or fwd, on anything other than super grade ultra dry tarmac.

All longitudinal, latitudinal (or any other dinal you care, or lateral, which it should be ) deceleration?!? should be done before the bend?!? and power delivery is the aim of the game around the bend, only light to begin with tho

You cant drive a 4wd car the same as any other car the dynamics of driving are totally different, as they are for a rwd or fwd car. You can only have a good feel for what the car as a whole is doing, the way you drive has to be different.

Anyhoo bye

 

 

[This message has been edited by Ay3388 (edited 29-12-2001).]

Lateral forces aren't affected by four wheel drive. The way power is distributed is different and so reaction of the car to driver input, particularly after loss of traction, is much smoother with 4wd.

 

As you say, 4wd is the choice of rally drivers due to traction all the time, not just when accelerating from standstill.

 

I was just making the point that 4wd doesn't give any more lateral grip. It's a fairly common misconception that it does. But I suspect I'm preaching to the converted in your case !

 

Finally, what is HALDEX ? I've never heard of it.

 

Cheers !

 

Dave

 

even more to the point .. what the hell has it got to do with the honking noise???

lol sorry syko mate

 

Personaly I have no idea of what you are on about. What honking? When? The only honking I hear on my car is when I press the horn, so I dont think is a standard noise.

 

 

OK final post here, 4wd offers more 'surefootedness', 'grip' or whatever you care to call it, whether going round bends or in a straight line, than the same car with either fwd or rwd, in varying road conditions. Im not saying fwd or rwd is crap, as this is all getting too far from the original point.

HALDEX, is a system used by a hell of a lot of maufacters which say that there cars are 4wd, Skyline, Audi 'tt coupe', vw golf 4motion, etc. Its a system whereby only rwd is trasmitted when the system detects front wheel slip, instead of a centre differential, it has what acts more as a centre clutch, which transmits power to the rear wheels, only able to send a maximum of 50 drive to rear wheels, instead of the full flexibility of a proper permanent 4wd system. It doesnt quite cut the mustard against the permanent 4wd cars 'in the sense of 4wd'. im not saying any of the above cars are crap, well I am in fact saying the above cars are crap, apart from the skyline.

 

Biyee

 

[This message has been edited by Ay3388 (edited 02-01-2002).]