BXProject

Bx Bandit · Post by **Bx Bandit** » 26 Oct 2007

Now, I'm not a chavvy boy racer but my back box on the valver is getting rather religious so it soon be time to replace it. As the genuine article is no longer available, I shall go the stainless route and will have it made by this s***h Atikan bloke in Cardiff.

What, in your collective opinions would be the least chavvy but best looking tail pipe design?

Also, there is a small silencer type deely half way along the the long pipe that joins onto the mani....I assume it is a silencer...? What would be the implications of taking it out altogether? Obviously I'm after better performance but without sounding like the local twins in their Corsa...if yer know what I mean!

Also...yes I do drone on...Backpressure: what exactly is it and how does it affect the engine?
ta chaps

Post by **Vanny** » 26 Oct 2007

google 'ricardo wave pressure tuning'

that should give you some reading and a half.
From a purely technical point of view, for best power output the length of the exhaust should be some where between 1.2 and 1.8 metres, and that is from the cylinder not the manifold. Obviously on the valver the exhaust DOESNT come out of the sides!

the little box is not a silencer but a resonator, designed to create back pressure and not make the exhuast quieter. I know of people who have removed them, i'd say thats a bloody stupid idea if you want a) power b) economy!

Unfortunately for us (and like most engine related things) the exhaust is quite well designed, i doubt you will get any performance increase by changing the exhaust alone. You'd have to look at removing silencers (making it unbearably loud) then remapping the ECU.

I guess this is a little bit personal as plenty of people have messed with the exhaust system, but typically to no benefit from what i can tell. Stainless is the way to go if your keeping the car though.

docchevron132 · Post by **docchevron132** » 27 Oct 2007

Stainless is a great idea.
Keep the resonator, as Vanny says, it'll fuck it up a treat if you dont, also make sure whoever makes it puts a splitter in the down pipe, that really does make a difference.

The easiest way to gain 5BHP is remove the crossbox and fot a "sidewinder", but it really does make things FOOOKING loud.

Again, as Vanster said, the exhaust is pretty much spot on in standard trim, so a stainless version of that is the best way to go.
As for the tail pipe..... well, thats personal choice.
Personally I like big and round with a rolled lip if your going the stainless route, other than that, I do actually like the tail pipe on PP's car.

Bx Bandit · Post by **Bx Bandit** » 27 Oct 2007

Am getting far less cash than I thought

Why is it ALWAYS that way round?

So, I'll have to keep it to the back box...not sure about this sidewinder idea....don't have any mates in the army so will be hard to get hold of one...besides a bloody great missile that close to a petrol tank is...er...no!

Don't want it chavved up and loud mate...I'll have to move up to Chestah if I do

Think I'm with you on big and round....my mate rekons two smaller twin pipes but I'm not convinved..

docchevron132 · Post by **docchevron132** » 27 Oct 2007

Noooooo, two small pipes.... ghey....

You could of course get a standard back box then find a local indy cit / pug garage and ask if you can nick the chrome tail pipe off something like a 306 etc..

Post by **Vanny** » 27 Oct 2007

docchevron1472 wrote: I do actually like the tail pipe on PP's car.

and unfortunately, thats the same pipe i have on my car

docchevron132 · Post by **docchevron132** » 28 Oct 2007

Oooh, you found it then!
Good man.
It's a nice pipe mate, and I suspect the difference is your cock wont have ventured up it unlike Tims....

mickey taker · Post by **mickey taker** » 28 Oct 2007

timbos tail pipe ooerr missus

I tend not to look at other peoples back boxes

is my one the standard tail pipe ?

docchevron132 · Post by **docchevron132** » 28 Oct 2007

What a handsome devil in the first piccy!

Yes mate, you have a standard back box.
As is the one on my valver, except mine is black!
Cherish your pipe young Mick, you cant get 'em anymore!

Post by **Vanny** » 29 Oct 2007

hmmm haven't paid attention to tims, but his appears to point straight out. Me thinks i might have a 8v GTi one (as it was actually advertised) and not a valver one. Will perhaps get pics to show what i mean

mickey taker · Post by **mickey taker** » 29 Oct 2007

Tims is angled to the nearside ,
dont forget the picture was taken at an angle to include Docs solar panel and Smiffy

mickey taker · Post by **mickey taker** » 29 Oct 2007

heres a better picture of Tims rear end

docchevron132 · Post by **docchevron132** » 29 Oct 2007

ARGH
ARGHHHH
AAAAAARRRRRRGGGGGGGHHHHHHHH!

mickey taker · Post by **mickey taker** » 29 Oct 2007

docchevron1472 wrote:ARGH
ARGHHHH
AAAAAARRRRRRGGGGGGGHHHHHHHH!

the counsellings not working then Chris

docchevron132 · Post by **docchevron132** » 29 Oct 2007

Going quite well actually, a couple of weeks ago I'd have set alight to my eye brows and thrown the computer out the window!

mickey taker · Post by **mickey taker** » 29 Oct 2007

oh well there is some progress then

have you tried using leeches for medicinal purposes

put them in vodka and watch them wriggle and die

makes me feel loads better

docchevron132 · Post by **docchevron132** » 29 Oct 2007

Couldn't find a big enough glass to put him in!

smiffy · Post by **smiffy** » 30 Oct 2007

mickey taker wrote:heres a better picture of Tims rear end

And for those who don't know, the guy kneeling on the floor facing away from the camera, is Doc's father!!

john s

docchevron132 · Post by **docchevron132** » 30 Oct 2007

Indeed so, somtimes called Geoff, because.....thats his name!

Ah, seeing that piccy brings back happy memories of when my valver looked nice.....

mickey taker · Post by **mickey taker** » 30 Oct 2007

yes tis indeed Geoff a lovely gentleman . totally the opposite to Doc ,

even my kids liked him

Stainless Exhaust..opinions please