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Old 15 October 2014, 10:01 PM
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WR1 WOZA
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Default MOT issue

Hi Guys
Not been on here for a while as the cars been tucked away in the garage for about 2 an half years !
can anybody tell me whats the crack with the MOT situation as my Wr1 is decatted and has a APS 3.5 Zorst system ! In the past my Friendly MOT man sorts it out for me but he is saying theres new regulations etc and his having a problem sorting it for me !Appently all cars with a cat fitted originaly they have to have one now surley must be away around this somehow , Just wondered as there must be thousands of decatted cars about so what does everyone else do ! My original system went about 8 yrs ago ! Needs some ideas ? Woza
Always try and get to B from A very Quickly !
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Old 15 October 2014, 10:06 PM
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jaygsi
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As you said unless you know a mot guy then you needed to either replace with standard cat every mot or buy a sports cat, i got a sports cat for mine.

You have a 2.5" or 3" system?

Last edited by jaygsi; 15 October 2014 at 10:33 PM.
Old 15 October 2014, 11:22 PM
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WR1 WOSA.
LOOKS LIKE U HAVE TO FIT CAT PIPE FOR MOT.UNLESS YOU CAN FIND A NICE MOT MAN TO HELP OUT..
Old 15 October 2014, 11:28 PM
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shame ur so far south . . .
Old 15 October 2014, 11:38 PM
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mikeblackett
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Just had to fit my cat back on mine today for mot, As soon as I got home took it straight off. It is a pain but I do it every year because they want it fitted.
Old 15 October 2014, 11:58 PM
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PM'd you WR1 WOZA
Old 16 October 2014, 10:54 AM
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Lunchmoney
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Originally Posted by Xline
Or, just fit a cat and leave it there. Really ... how much difference does it make?
Enough of a difference that lots of people do it.
Old 16 October 2014, 11:47 AM
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jaygsi
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Quite alot over a standard cat, not much over a sports cat, i'd just get a sports cat, not cheap but saves years of hassle
Old 16 October 2014, 11:55 AM
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*matthewturb2000*
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Less restrictive = better exhaust flow
Old 16 October 2014, 11:59 AM
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Trinity
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It really does make me wonder how people who are supposedly performance car enthusiasts dont understand the restrictions of the cat, especially on vehicles before the technology was improved to optimise the restrictions. I mean, its not even THAT complicated, but hey ho, some are just ignorant I guess.

Mine made 27bhp more with the CAT removed and mapped again (it was mapped as standard as well). I believe UK cars may see more as they have two cats.

However that 3.5" exhaust system will be doing you NO favours on a standard EJ20.

You need to find a friendly tester, but its getting tougher now, especially as they will lose their licence if they get reported for running the gasses from another vehicle when testing one vehicle.

Or buy a sports cat, you could sell that exhaust and get a good 2.5" one with a sports cat, you will see power increase and lower down torque. Win Win really

Last edited by Trinity; 16 October 2014 at 12:02 PM.
Old 16 October 2014, 12:13 PM
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Yes sweetheart exactly that, hence why I answered the question. Standard system, then with a Hayward decat downpipe.

Its because, this has been a discussion, that has been proved time and time again on car forums for years and years, its not an area of knowledge that needs questioning or even proving anymore, only by the newbies or ignorant.

Its not even worth explaining the technical reasons why to you, but the search engine and google are your friend as you are not technically minded (dont worry, many aren't)

Why do you people do it? Yes lets go spend money on a decat or a sports cat and any costs in fittings, gaskets, mapping etc....because it dosent do anything? Well that would just be daft.

Stop trolling, and accept the knowledge
Old 16 October 2014, 12:41 PM
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lol. Thats some of the best stuff you have ever written right there.

Go troll somewhere else, or ask your buddies those questions, I don't need to fill your knowledge bank

Last edited by Trinity; 16 October 2014 at 12:42 PM.
Old 16 October 2014, 12:45 PM
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I could, but not to a troll, I don't need to waste the time, cool
Old 16 October 2014, 12:51 PM
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Nope, as explained earlier, I can, but not to a troll.

However, If you want to pay me for my time, then I will. Drop me a PM with your email address and ill send you an invoice, once paid, i'll tell you all you ask (until the time you paid for runs out)

Can't say fairer than that cherub.
Old 16 October 2014, 01:00 PM
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As This isn't your thread, I've answered the OP with helpful knowledgable info, make a thread yourself if you want answers? Isn't that an idea!

It seems from your previous posts there hasn't been a single thread where you have been helpful to another person. Interesting that.

Enjoy your day, it'll cost you from now on to ask me anything , I look forward in hearing from you. I helped you out last time in your internet security knowledge (or lack of) can't keep doing the same for free
Old 16 October 2014, 02:03 PM
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Lunchmoney
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Originally Posted by Xline
So you won't actually answer the question? Why are you even posting here then?
Wow, you are just like a 5 year old, repeating the same question over and over 'cos you don't like the reply you are hearing.

If it helps, my car went from 290bhp to 315bhp and the only change was from standard exhaust to 3in decat.
How much did that cost me? Just fitting as the exhaust came from a donor car that I already owned (and exhaust was on that car when I bought it) but was written off in an accident.
How much does it cost each year at MOT? Nothing. My car goes in for service and MOT, I collect it a day later with a nice new MOT certificate and invoice for the servicing. Any work they do to make it MOT ready is included. Aren't I lucky?

To keep it on the OP's topic, as others have said, either fit a car at MOT time or get lucky with MOTer.
Old 16 October 2014, 02:10 PM
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Trinity
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Originally Posted by Lunchmoney
Wow, you are just like a 5 year old, repeating the same question over and over 'cos you don't like the reply you are hearing.

If it helps, my car went from 290bhp to 315bhp and the only change was from standard exhaust to 3in decat.
How much did that cost me? Just fitting as the exhaust came from a donor car that I already owned (and exhaust was on that car when I bought it) but was written off in an accident.
How much does it cost each year at MOT? Nothing. My car goes in for service and MOT, I collect it a day later with a nice new MOT certificate and invoice for the servicing. Any work they do to make it MOT ready is included. Aren't I lucky?

To keep it on the OP's topic, as others have said, either fit a car at MOT time or get lucky with MOTer.
Old 16 October 2014, 02:21 PM
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Willowsdad
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Crazy thing is, the WR1 comes with a prodrive sportscat as standard. Mine only just passed the emissions test with it. I wonder how much difference binning the cat for a 3.5" exhaust actually made.
Old 16 October 2014, 02:31 PM
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Trinity
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Originally Posted by Willowsdad
Crazy thing is, the WR1 comes with a prodrive sportscat as standard. Mine only just passed the emissions test with it. I wonder how much difference binning the cat for a 3.5" exhaust actually made.
Yes thats true, never thought of that. You will see a little extra over a sports cat, but its not a huge increase unless running big power. a 3.5" exhaust will actually lose power low down on a standardish lump, top end it may gain some on a standard exhaust. On a twinscroll standard, a 2.5" actually works much better because it needs the backpressure - i dare say a UK model would be better with a 2.5 as well, but you wouldnt see as big a bhp figure, but you would see a much nicer torque curve.

What our resident troll dosen't understand is it dosent matter how big you exhaust bore is, if there are multiple restrictions in the cat, the bore wont really change the power output as it will be AFTER the cats. So changing the exhaust with cats in place wont see much of a return.

Ah well, cest la vie, trolls will be trolls! Keeps us entertained.
Old 16 October 2014, 03:07 PM
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Originally Posted by Xline
How much though?
You really have no idea do you
mine gained 15 bhp decatting ,this was on a vf35 newage sti,but it also made the car more responsive.
Old 16 October 2014, 03:07 PM
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Lunchmoney
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Originally Posted by Xline
So that's not just the CAT then?

Read post #5 in this thread.
What else did I change? I removed the cat, I added a decat exhaust. So yes, just the CAT.

edit: I lie, I also changed the steering wheel. But I dont think I gained any bhp or torque from that.

Last edited by Lunchmoney; 16 October 2014 at 03:13 PM.
Old 16 October 2014, 03:16 PM
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Originally Posted by Lunchmoney
Wow, you are just like a 5 year old, repeating the same question over and over 'cos you don't like the reply you are hearing.

If it helps, my car went from 290bhp to 315bhp and the only change was from standard exhaust to 3in decat.
How much did that cost me? Just fitting as the exhaust came from a donor car that I already owned (and exhaust was on that car when I bought it) but was written off in an accident.
How much does it cost each year at MOT? Nothing. My car goes in for service and MOT, I collect it a day later with a nice new MOT certificate and invoice for the servicing. Any work they do to make it MOT ready is included. Aren't I lucky?

To keep it on the OP's topic, as others have said, either fit a car at MOT time or get lucky with MOTer.
My WRX Wagon was 256 BHP on remapping but did have a K&N panel filter, WR Sport back box, Walbro and deresonated centre pipe.

I de-catted the up pipe on my WRX Wagon and it helped to raise the BHP to 276BHP and the torque went up a similar amount this was after a map tweak. The response to the throttle was better, in gear was more rapid and inconjunction with the remap the fuel consumption improved.

The driving characteristics where better, allowed for better overtaking and in general conditions.

Why did I do it?
PPP was £1500 at the time but a tuner remap, all the bits, more BHP came to less than £1000.

No brainer!
Old 16 October 2014, 03:27 PM
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Originally Posted by Xline
So it was 3in before?
Yes the exhaust they removed was also 3in.

Last edited by Lunchmoney; 16 October 2014 at 03:29 PM.
Old 16 October 2014, 03:29 PM
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Originally Posted by The Trooper 1815
My WRX Wagon was 256 BHP on remapping but did have a K&N panel filter, WR Sport back box, Walbro and deresonated centre pipe.

I de-catted the up pipe on my WRX Wagon and it helped to raise the BHP to 276BHP and the torque went up a similar amount this was after a map tweak. The response to the throttle was better, in gear was more rapid and inconjunction with the remap the fuel consumption improved.

The driving characteristics where better, allowed for better overtaking and in general conditions.

Why did I do it?
PPP was £1500 at the time but a tuner remap, all the bits, more BHP came to less than £1000.

No brainer!
Have you not got an MOT Trooper? I have. I drop it off, it comes back with a nice shiny MOT.

Is'nt it illegal not to have an MOT? Its been suggested that you dont have one? Thats pretty naughty, those Interceptor Police will catch up with you you know!
Old 16 October 2014, 03:35 PM
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Originally Posted by Trinity
Have you not got an MOT Trooper? I have. I drop it off, it comes back with a nice shiny MOT.

Is'nt it illegal not to have an MOT? Its been suggested that you dont have one? Thats pretty naughty, those Interceptor Police will catch up with you you know!
I don't have a tax disc, chip on my shoulder, the WRX Wagon anymore but I do have an MBE but that does not count in a garage
Old 16 October 2014, 03:41 PM
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Trinity
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Originally Posted by The Trooper 1815
I don't have a tax disc, chip on my shoulder, the WRX Wagon anymore but I do have an MBE but that does not count in a garage
Its Scoobynet, everything counts apparently, even if you own a Ferrari Lawnmower ( only with a decat I may add)
Old 16 October 2014, 03:52 PM
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Originally Posted by Trinity
Its Scoobynet, everything counts apparently, even if you own a Ferrari Lawnmower ( only with a decat I may add)
I had two Bengal cats, one died.

I have one cat inplace, so I am de-catted

Last edited by The Trooper 1815; 16 October 2014 at 03:53 PM.
Old 16 October 2014, 03:54 PM
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Originally Posted by Xline
Cool, so that's 25bhp, or 8.6% increase for you.
17bhp (unknown %age) for fat-Thomas,
27bhp (unknown %age) for Trinity.
I asked how much ... and I am starting to get a picture now. It's f*cking hard work though, especially when there a patronising tw*t getting in the way
You struggle to get the answer you want because you're a pedantic *****! Every post I have see of yours, you're questioning why somebody is doing something rather than just helping them. Please go away.
Old 16 October 2014, 03:56 PM
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Originally Posted by The Trooper 1815
I had two Bengal cats, one died.

I am now de-catted
Old 16 October 2014, 04:01 PM
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Originally Posted by kevfawcett
You struggle to get the answer you want because you're a pedantic *****! Every post I have see of yours, you're questioning why somebody is doing something rather than just helping them. Please go away.
We should start a vote


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