engine noise question

[Chewitt]

its all take take take from me today....

my engine sounds pretty smooth but if I blip the throttle there is a noise like this


vruummmm caac the caaac noise is only on the overrrun and a short noise
I think it gets less when its warmed up but not so sure now??

or better still like this

http://www.ziddu.com/download/1947696/enginetuscan...

should i worry

doesn't do it if i roll off the throttle

tried posting on the speed six bit but tis a little quiet there!

thanks

Edited by Chewitt on Monday 18th August 18:39

Edited by Chewitt on Monday 18th August 19:34

[Night Rider]

Apart from being one of the weirder posts I’ve read on Piston heads it’s also a clever one. That noise sounds very much like a vibration from a loose something or other. It could be any number of bolt on bits that maybe loose. Pop the bonnet and have a tap and prod at anything that is fixed to anything. If the noise fades when hot it maybe exhaust, the system grows lots when hot, mine lengthens up to 10mm when hot.

It may be either one of the trays under the engine or gearbox. It could be a loose bolt and the washers are vibrating......search and destroy.

Soz I cant be more accurate but it really could be anything.
Rob

[dvs_dave]

It's a backfire on the over run and one of the joys of the Speed 6 sound. They all do it, moreso when cold and it's running rich. It's perfectly normal and due to the exhaust valve timing overlap.

Put some Tesco 99 in it and it'll do it more.

[Shaolin]

fking Hell! My speakers were up full and the dog and I nearly shat ourselves!

Need to go out for a blast in the Tusc now