Interesting bit of exhaust pipe

Matt H · Post by **Matt H** » Mon Jul 28, 2008 3:55 pm

Don't know what it's actually called, but it bypasses the central exhaust silencer on the GTi/16v/TD

Clicky

Regards,
Matt

Philip Chidlow · Post by **Philip Chidlow** » Mon Jul 28, 2008 6:02 pm

Having spent a lot of today watching BX Sport go around a circuit, this could be the start of my track car project!

Post by **docchevron** » Tue Jul 29, 2008 2:34 am

Ah yes...

And many thanks for teh pipe, which will give about 3BHP on TD, but more importantly up the torque by a whopping 12LB/FT!
Makes virtually no diffeence in exhaust note ona diesel, but by heck they make a valver, er, well, as Jon said, mental!

They free up a fair bit of BHP on a valver, but aint legal for road use and frankley get dang annoying after 30 minutes of giving it beans.

Philip Chidlow · Post by **Philip Chidlow** » Tue Jul 29, 2008 5:36 pm

But for a track day car?....

Kitch · Post by **Kitch** » Tue Jul 29, 2008 6:39 pm

Can't see why they're not road legal on a valver, but I had one and although a bit pokier lower in the revs, it was a bit strangled higher up I thought. Sounds gash too, made it sound like a Nova

Should say "for diesels only"

Philip Chidlow · Post by **Philip Chidlow** » Tue Jul 29, 2008 7:04 pm

Any thoughts on using it with an 8v GTi?

djoptix · Post by **djoptix** » Tue Jul 29, 2008 9:25 pm

I don't know for sure, but I wouldn't be surprised if it gave more of a noise boost than a power boost! Nice trouble-free way to bypass the box though, as I assume this item still has a hanger on it.

Post by **mat_fenwick** » Tue Jul 29, 2008 11:37 pm

Are you going to have a bid Phil? Or have you done so already? I am interested, but I'm not going to bid against you if you are - I can always find out whether he has another...

Philip Chidlow · Post by **Philip Chidlow** » Tue Jul 29, 2008 11:48 pm

I have bid. But I am not wedded to it, so even if I win it I'd consider passing it on for cost.

Post by **mat_fenwick** » Tue Jul 29, 2008 11:53 pm

Are you thinking of track day-ing your new toy once you pick it up? Is that another GTi auto?

If I were to fit this pipe I would have a 4k mile Bosal box coming off, so could possibly do some kind of swap if you won it and didn't use it. Good luck!

Philip Chidlow · Post by **Philip Chidlow** » Tue Jul 29, 2008 11:57 pm

I have a mind to find a good GTi manual to strip out. Next year maybe. In the meantime the GTi auto I am hoping to collect will be given an easy life!

Post by **mat_fenwick** » Wed Jul 30, 2008 12:04 am

I wonder whether a stripped out TurboD would make a good (perhaps ironic!) track car? Given a petrol gearbox it would at least be quick in each gear, but obviously run out of revs very quickly.

(I have driven mine in an autotest once, when my promised ride in a friends car failed to materialise. Managed to come 14th out of about 30 entrants, which wasn't too bad I thought considering that handbrake turns were out of the question...)

Post by **docchevron** » Wed Jul 30, 2008 2:36 am

djoptix wrote:I don't know for sure, but I wouldn't be surprised if it gave more of a noise boost than a power boost! Nice trouble-free way to bypass the box though, as I assume this item still has a hanger on it.

The noise increase is rather alot, but unless you've got a proper resonator and back box it does indeed sound like a bean can exhaust 1.0 Nova.

The power increase comes form losing the back pressure created in the cross box whilst retaining the overall flow length of the exhaust.

Kitch, the noise level with said pipe falls fowl of the law. Ok the chances of PC plod ever stopping a BX for a decible check is low, but it could happen.
Although they seem to mainly pick on bikers and 12 year old's in Scobby's...

Post by **docchevron** » Wed Jul 30, 2008 2:40 am

Philip Chidlow wrote:Any thoughts on using it with an 8v GTi?

Almost exactley the same principle.
It will release about 2-3 BHP and make it a bit raspier.

There's an awful lot you can do to an 8V lump to get a huge amount of power.
As it goes you can get fairly good increases in power and torque without spending mega bucks too.

If you want a balls out track car, I'd worry less about the devil pipe and more about spending some time on the noisey bit in the front!