#1: De-cat hdi Author: sulli, Location: SheffieldPosted: Tue Jul 24, 2012 3:55 pm ---- Hi so i have fitted a cherry bomb to my 1.4 hdi, doesnt seem to have made much difference to engine noise to be honest. My system is as follows.
Manifold > Cat > flexi > Cherry bomb.
What im wanting to know is if there is any available decat pipes pre fabricated i can buy for this engine as i have look high and low and cant seem to find any. Ive took the blacket off infront of the turbo and cat and noticed that the cat can be unclamped so can just be replaced with a pipe im presuming?
All help appreciated thanks.
#2: Re: De-cat hdi Author: cartoonhead, Location: North ManchesterPosted: Tue Jul 24, 2012 4:24 pm ---- take the cat off and empty it , just rip its guts out
all honesty im not sure on the 1.4 hdi's but at worst you could just pull the honey comb out of the cat because unless the m.o.t rules have been changed derv's dont need a cat
i'd hang on for now in case there's any drawbacks to emptying the cat on a 1.4 , someone on here will know
#3: Re: De-cat hdi Author: sulli, Location: SheffieldPosted: Tue Jul 24, 2012 4:26 pm ---- Oh right, so i dont need a CAT by law then? for the MOT sake? thats why i didnt want to do the above lol.
Thanks.
#4: Re: De-cat hdi Author: swaynie, Location: United KingdomPosted: Tue Jul 24, 2012 7:21 pm ---- you need one by law
Wrong not on a diesel as they are smoked tested at MOT
#6: Re: De-cat hdi Author: sulli, Location: SheffieldPosted: Wed Jul 25, 2012 5:46 am ---- Right, i think the cheapest option, instead of having a decat pipe fabricated as i can not see any already done online is going to be to knock the middle of the cat out, is this a hard job? thanks
Right, i think the cheapest option, instead of having a decat pipe fabricated as i can not see any already done online is going to be to knock the middle of the cat out, is this a hard job? thanks
any exhaust can make you a decat pipe, 20-ish.
then sell your cat. -50ish..
#8: Re: De-cat hdi Author: sulli, Location: SheffieldPosted: Wed Jul 25, 2012 9:12 am ---- Ok cool, will I notice a big difference from taking the cat out? Thanks
#9: Re: De-cat hdi Author: propaintballa, Location: Weymouth/Leamington SpaPosted: Thu Aug 23, 2012 9:33 am ---- You won't notice a major difference and it's never going to be overly loud either
I have a decat on my 2.0 HDI (just got my garage to weld a bit of pipe in) and you can't even tell from inside the car
In fact, you can't really tell until you're behind the car really
#10: Re: De-cat hdi Author: propaintballa, Location: Weymouth/Leamington SpaPosted: Thu Aug 23, 2012 9:37 am ---- You won't notice a major difference and it's never going to be overly loud either
I have a decat on my 2.0 HDI (just got my garage to weld a bit of pipe in) and you can't even tell from inside the car
In fact, you can't really tell until you're behind the car really
#11: Re: De-cat hdi Author: Ghosty, Location: WiltshirePosted: Thu Aug 23, 2012 10:24 am ---- something to consider before you de-cat it,
i know with my GTi HDi, when the dpf was removed, the cat was left in place to provide a preassure difference between the 2 sensors, if yours has these sensors (yes im aware its a 1.4) it may trigger some fault codes.
ultimatly, when i have found a good replacement for my whole dpf/cat mine will be removed and the sensors de-activated.
to the other people, i did extensive research before getting my dpf removed (and a stage 1 remap) and i can confirm the diesels DO NOT require either a dpf or cat, for either legal or mot reasons, however just to be on the safe side i have left the can of the dpf in place to make it look like i have one
#12: Re: De-cat hdi Author: Sammflynnn, Posted: Fri Jun 21, 2013 7:54 am ---- I would also like to know if I decat my 2.0 hdi will it bring the engine management light on and mess anything up? Thanks
#13: Re: De-cat hdi Author: Big_Rich180, Posted: Fri Jun 21, 2013 8:17 am ----
Mikey2uk wrote:
swaynie wrote:
you need one by law
Wrong not on a diesel as they are smoked tested at MOT
I thought if the car left the factory with a cat it needed to have it for the MOT regardless of weather its tested or not.
#14: Re: De-cat hdi Author: macca1411, Location: Westhoughton, LancashirePosted: Fri Jun 21, 2013 8:34 am ----
Big_Rich180 wrote:
Mikey2uk wrote:
swaynie wrote:
you need one by law
Wrong not on a diesel as they are smoked tested at MOT
I thought if the car left the factory with a cat it needed to have it for the MOT regardless of weather its tested or not.
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