de-cat down pipe

[sheptdi]

hi , i made a complete new exhaust system fo my leon 110 asv last week ,decat mufflerectomy etc. i used 2.5" tube because 3" was a tight fit between the subframe and floor where it meets the bottom of the bulk head. a guy on tdi club had 3" on his bora and removed it after a few months due to the tractor sound and drone it gave off. hope this helps brightsideteeem

 

[brightsideteeem]

thanks devon + shep

 

[trebormint]

On my 1.9tdi 110bhp toledo - I've a decat pipe and back box made by longlife exhausts and its not noisy at all.

 

[brightsideteeem]

mufferectomy sound is good isnt it

 

[devonmikeyboy]

Also maybe planning a completly custom exhaust, if work let me use the ramps, complelty stainless steel, dect, deleted silencer, and was thinking maybe 3" bore mandrel bent pipe from the turbo straight to the back? Do you think the bore is too big, too much like overkill, as I now know you dont need backpressure, or would 2.5" do the trick like devonutopia's fabia?

3" would be overkill, very tight and no gain over 2.5" really but no reason not to as such.

 

[brightsideteeem]

cool, nice one mate, I read your magazine write up. All I can say is. WOW.

 

[TornadoRed]

Removing the cat might permit a very slight increase in power.

More noticeable, for those who have a temperature gauge installed, is that the turbo inlet temp is much lower with the cat removed and especially with a bigger downpipe. So you can run at higher speeds or with greater load for longer distances without putting as much stress on the turbo.

A few extra horsepower is just a bonus.

 

[ibizadoyle]

went to longlife today and they said you mite av difficulties with the car going into limp mode is this true??

 

[trebormint]

I've had no probs going into limp mode on the 110tdi.

Just moved my decat to my new toledo pd130 - still no limp mode.

 

[cupra.steve]

mine has been on the car for a few months now. No limp mode just more power. It picks up better low in the rev range and i would recommend doing this to anyone!

 

[devonmikeyboy]

No reason you should have any problems as there are no censors in a diesel CAT unlike a petrol CAT which would cause problems if removed.

 

[ibizadoyle]

ok cool thanks for the help guys

 

[cupra-rick]

where is the best place to get a de-cat pipe form
for my 1.8t (auq) leon

 

[brightsideteeem]

Miltek, Blueflame, etc seem to be popular brands.

Ebay?

Google

 

[pazman2k]

Are they easy to fit? I've already got a milltek full catback system on there (Got it very cheap, 100 quid, was off a 1.8 turbo so got Milltek to make up a reducer sleeve for me ). If these are easy to fit I might consider picking one up and ditching the cat

 

[cupra-rich]

anybody got one of these downpipe's fitted?

http://www.thsperformance.co.uk/product/Downpipe_Decat_for_1.9_TDi_Cars_THSTDDP-1

 

[Andrewcupra TDI]

no , but have seen a few posts about it before , i just went for miltek about same price as that but milteks are known for quality and build hence why i chose them as apposed to custom etc

 

[BigLad]

I have an apr 100 cell race cat on my cupra, and although the fitting was terrible I managed to get it on, my main worry was the emissions on the mot as some people say you need a 200 cell cat to pass...

We mine passed today with flying colours so well that i would risk it now with no cat ;-) No back pressure on the turbo! My mates have straight out exhaists on their evos and skylines and they run amazing!

 

[ibizadoyle]

getting my de-cat d-pipe on the 15th having it made by prospeed been there b4 and their crackin!!!!

 

[cupra-rick]

after fitting the de-cat pipe do u have any problem with the 2nd lamber
or the engine light coming on