Why do they sound so good?

[lazyitus]

As in the title really.

So - TVR's sound superb. But why. Its OK to say its because its a V8 or "its got no cats" etc but what is it thats making the majestic sound?

[bridgdav]

Engine

Gotcoat

[shadowninja]

I bet the big pipes leading out of the engine help...

[crankedup]

Yep, all the ingredients are there and the rest is all in the pipes. Lovely.

[dewi]

I was once told that it was the "expansion chambers" out of the manifold. Not that I know what that means!

Still, can't beat sitting at the lights and blipping the throttle to the delight of those pulled up along side!

[zumbruk]

Essentially, all large capacity un(der)silenced V8s are the same. I live a few miles from Santa Pod, and the noises that come drifting on the wind are glorious!

[ByronTVR]

Engine size and "Valve Overlap" maybe ?

Byron

[FourWheelDrift]

It's all done with mirrors.

[slikk]

Wearing an asbestos suit for this, but here goes.. .. ..IIRC its because a V8 produces sound waves at about 120 cycles per second, which is an optimum range for the human ear. But undoubtedly someone is going to know otherwise.

[donatien]

slikk said:

Wearing an asbestos suit for this, but here goes.. .. ..IIRC its because a V8 produces sound waves at about 120 cycles per second, which is an optimum range for the human ear. But undoubtedly someone is going to know otherwise.

Depends on crank arrangement. Fezzas, Lotus and the AJP V8's all have a flat crank so they sound like 8 wasps farting until they come on song. The AJP is a bit odd in that it is not a 90 degree vee - forget the exact angle but someone here will know.

Rover V8 is a cross plane crank so sounds more meaty.

Either way with TVR's "They all do that sir"

Dave

[Batty S4C]

donatien said:

slikk said: Wearing an asbestos suit for this, but here goes.. .. ..IIRC its because a V8 produces sound waves at about 120 cycles per second, which is an optimum range for the human ear. But undoubtedly someone is going to know otherwise. Depends on crank arrangement. Fezzas, Lotus and the AJP V8's all have a flat crank so they sound like 8 wasps farting until they come on song. The AJP is a bit odd in that it is not a 90 degree vee - forget the exact angle but someone here will know. Rover V8 is a cross plane crank so sounds more meaty. Either way with TVR's "They all do that sir" Dave

even with the old V6 motors?
cuz they sound luverly (as mentioned in evo they do sound rather like a V8)
??

[donatien]

Probably a comparison between old un-catted V6's and newer V8's with cats.

A high capacity V8 will never have any equal for sounds. One of the reasons the Rover V8 sounds so good even in low capacities (3.5 or 4.0) is due to the near-pyramidical motion of the piston motions. Why this translates to noise I don't know.

There, I've even lost myself. Heard it said somewhere and it sounds good to me - as does a decent Rover V8

Night all

Dave

edited - I know pistons can't move that way but the way the crank pin moves is a sort of pyramid.


>> Edited by donatien on Wednesday 2nd June 22:43

[yellabelly]

I think that the rotational motion of the crank "pin" or Journal describes a circle, having a fixed point of rotation (the journal bearing centre line) limits this to the said circular motion. Now for a pyramidic path of rotation that sounds nigh on impossible unless you have a wankel (hurriedly checks spelling)



>> Edited by yellabelly on Thursday 3rd June 01:57