Decat

9th May 2009, 16:14

I know decating makes a difference but is it noticable. Just woundering as I'm thinking about doing it

Cheers mat

9th May 2009, 16:15

9th May 2009, 16:20

Quote:

Originally Posted by SaXo_vtr123

lmao james

tbh it made no diffrence on my old vtr

9th May 2009, 22:20

made a dif on my old vtr feel it in 3rd it free's up the revs

10th May 2009, 01:59

cheers fro the advice think i going to decat and strip the back out and maybe a manifold just not sure what maniflod

cheers

10th May 2009, 02:03

Yo jay, why you gotta be dissin my search button red circle pic thing?

10th May 2009, 02:22

I think back in the day with the mandatory introduction of Cat's they used to restrict the flow quite severely, however with 15 years of compulsory use I don't think the Cat's are as restrictive and poorly designed as they once were.

I'd say keep it, but I've yet to actually decat mine and find out for sure if it runs any better.

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10th May 2009, 02:25

made a difference on my vts feels like it pulls better and the exhaust sounds nicer also pops when changing down a gear

10th May 2009, 09:07

you will get a small gain by removing it. Usually most noticable at the top end.

Its not going to be massive for the reasons adsayer wrote

10th May 2009, 09:18

It all depends on where you are going with the car too. If your going big power then it will have to come out as it will reach a point where it is the main restriction but just breathing mods to a vtr you probably wont notice much, if anything.

10th May 2009, 16:19

I thought removing your cat would of made a difference cause I thought they restricted the gases passing through or I might be talking crap

10th May 2009, 16:25

the cats ive come across are very restrictive, but having said that ive only ever come across old cats. like ad sayer said im pretty sure that with cats being used for a while now they are alot better designed and less restrictive

10th May 2009, 16:38

I have a mk2 vtr with a janspeed manifold, 1.4 saxo centre section and a supersprint backbox and made 110.9bhp at a rolling road.

Decat makes it sound very good imo id definately reccomend it.

10th May 2009, 16:39

tbh depending on what your plans are for the car that should determine whether you should remove it.

air filters
manifold
exhaust
cam and map
that would be a good time to remove the cat

if you just air filter and exhaust type of guy leave it in save yourself the hassle

10th May 2009, 18:11

I'm going to do all of the mods stated above except maybe cams and remap. I'm wanting to get better throttle response

Cheers mat

10th May 2009, 20:21

mine is decatted and a strait through stainless steal system on a standard manifold and its pretty loud and pops like mad

10th May 2009, 21:08

got a raceland 421, supersprint catback centre pipe and a supersprint magnum backbox. last week i added a sebring decat pipe, didn't have much time to test it propperly but i'm loving the sound it's producing. It's producing more noise and sometimes a pop and a bang

10th May 2009, 21:55

Its made a massive difference on my mates VTs.

11th May 2009, 09:46

sod it definetly going to decat it just spoke to the lad down at manic motors about it but now got to make a new decision a supersprint centre section no silencer (£100)or a stainless steel no silencer (£65). what do you lot think

cheers

11th May 2009, 11:13

Should make a small difference and increase in BHP and Torque.

Personaly would go for the silenced centre section.

11th May 2009, 11:27

Quote:

Originally Posted by KamRacing

you will get a small gain by removing it. Usually most noticable at the top end.

Its not going to be massive for the reasons adsayer wrote

Pretty much how i feel about mine decat'ed it revs alot more 'free'ly' and pulls harder top end, plus it sounds lovely

. worth it imo