Home Made De-Cat !!
10 August 2002, 07:12 PM
#1
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Im after some options on this one...
I thought I had a prodrive centre section in the shed but when I took it to get fitted the guy said it had a Cat, so I didnt fit it, he said, as you didnt pay for it why not remove the cat yourself!
So I did! I knocked out the wierd grey honeycomb stuff and along with that came a bit of wire mesh and two strips of metal. It came out as clean as a whistle, inside is perfect, nothing left in exhaust.
So.... Can I fit this to my car?? Looking at the Magnex cat replacemnt pipe its just a pipe.. so now mine is also just a pipe (with an empty box) could I fit this?
any ideas appricated...
cheers
Leon
P.S, I can now see how a cat is VERY restrictive, the grey honeycomb stuff is a very tight mesh which will obvisouly greatly restrict airflow.
I thought I had a prodrive centre section in the shed but when I took it to get fitted the guy said it had a Cat, so I didnt fit it, he said, as you didnt pay for it why not remove the cat yourself!
So I did! I knocked out the wierd grey honeycomb stuff and along with that came a bit of wire mesh and two strips of metal. It came out as clean as a whistle, inside is perfect, nothing left in exhaust.
So.... Can I fit this to my car?? Looking at the Magnex cat replacemnt pipe its just a pipe.. so now mine is also just a pipe (with an empty box) could I fit this?
any ideas appricated...
cheers
Leon
P.S, I can now see how a cat is VERY restrictive, the grey honeycomb stuff is a very tight mesh which will obvisouly greatly restrict airflow.
10 August 2002, 07:45 PM
#2
Yes you can fit it to your car but I doubt if you'll feel a jot of difference 
Only when this is matched to a de cat DP will any real benefit be felt IMHO.
Cheap mod though.
F
BTW, I hope you didn't breath any of the dust in when bashing away at the cat.....
Only when this is matched to a de cat DP will any real benefit be felt IMHO.
Cheap mod though.
F
BTW, I hope you didn't breath any of the dust in when bashing away at the cat.....
10 August 2002, 08:12 PM
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I did wonder about the dust, tried to avoid it! .... why?! presume its dangerous in some way.
I do have a Prodrive Back Box so was hoping to gain a little with the removal of the cat, do you reon it would be louder or quieter with the empty cat box rather than a straight through pipe?
I do have a Prodrive Back Box so was hoping to gain a little with the removal of the cat, do you reon it would be louder or quieter with the empty cat box rather than a straight through pipe?
11 August 2002, 12:55 PM
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When you say ever so slightly louder! Do you mean stupidly loud! I don’t want it really loud and the Magnex De-Cat pipe (without resonator) is only £60, so if that would be quieter I could go for that.
No doubt when I change the mid section ill want to change the down pipe soon after
just worried about the MOT and the hassle of changing the system once a year.
Leon
No doubt when I change the mid section ill want to change the down pipe soon after
just worried about the MOT and the hassle of changing the system once a year.Leon
11 August 2002, 02:40 PM
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Location: Leeds - It was 562.4bhp@28psi on Optimax, How much closer to 600 with race fuel and a bigger turbo?
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just put it on... its a ten min job to change!
take it off if you dont like it
David
take it off if you dont like it
David
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11 August 2002, 07:55 PM
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Got a MY99 UK Impreza Turbo, Live near Stafford / Uttoxeter. What motor have you got? might of seen you around Stoke as im up there a fair bit.
And Dave, your prob right! il get it fitted tommorow, Just didnt wana pay to get it fitted, pay to take it off then pay again to get a proper one fitted! if I had the gaskets and that sealant stuff could do myself I suppose..
Leon
And Dave, your prob right! il get it fitted tommorow, Just didnt wana pay to get it fitted, pay to take it off then pay again to get a proper one fitted! if I had the gaskets and that sealant stuff could do myself I suppose..
Leon
11 August 2002, 09:59 PM
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leon ,
I noticed a rather distant rumble when doing the same as you with the cat . The "chamber" takes on a slight echo effect . Somewhat scoobysport but under your seat more than out the back . Sounds beaut when revving , but not much loader . I always guage a mod by my wifes response . If she doesn't notice , neither will you . I once had a dog that learned my exhaust note and was interesting to see how long she took to learning the new one .It will also go better , you will notice it more eager to rev too . The real noise comes from removing the dp cat . Davids right buy a set of ramps and do this kind of stuff youself , all you need is a set of 14mm spanner and sockets .
Ray
I noticed a rather distant rumble when doing the same as you with the cat . The "chamber" takes on a slight echo effect . Somewhat scoobysport but under your seat more than out the back . Sounds beaut when revving , but not much loader . I always guage a mod by my wifes response . If she doesn't notice , neither will you . I once had a dog that learned my exhaust note and was interesting to see how long she took to learning the new one .It will also go better , you will notice it more eager to rev too . The real noise comes from removing the dp cat . Davids right buy a set of ramps and do this kind of stuff youself , all you need is a set of 14mm spanner and sockets .
Ray
11 August 2002, 11:29 PM
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actually you need 12 and 14mm..
Reuse the gaskets and you can buy exhaust paste cheap...
David
Reuse the gaskets and you can buy exhaust paste cheap...
David
12 August 2002, 08:25 AM
#16
Leon
You won't need any paste or gaskets, just use the old one's.
Yes really!
On the noise front, I doubt if you'd notice the car with the centre cat removed from one with (Std DP and BB identical on both cars).
F
You won't need any paste or gaskets, just use the old one's.
Yes really!
On the noise front, I doubt if you'd notice the car with the centre cat removed from one with (Std DP and BB identical on both cars).
F
12 August 2002, 01:27 PM
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Leon - the meet is at 7.30 pm at the Whalton Inn on the A34. There is a thread about it in the midlands section.
http://www.scoobynet.co.uk/bbs/thread.asp?threadid=119893
Look forward to seeing you !
Jonto
http://www.scoobynet.co.uk/bbs/thread.asp?threadid=119893
Look forward to seeing you !
Jonto
08 December 2002, 12:23 AM
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Cheers Ray, Decision made - will get it fitted at local garage tommorow (only £10) and will look into some ramps for future work (or removal if it sounds crap!)
Jonto, where abouts is the Stone meet? should be able to make that one, will try and get my mate with a New Sti to pop along aswell.
Leon
[Edited by LeonWells - 8/12/2002 12:29:28 AM]
Jonto, where abouts is the Stone meet? should be able to make that one, will try and get my mate with a New Sti to pop along aswell.
Leon
[Edited by LeonWells - 8/12/2002 12:29:28 AM]
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