MK5 Golf GTI

All Things Mk5 => Mk5 General Area => Topic started by: Hurdy on December 21, 2009, 07:57:32 pm

Title: Teaser pic - custom DECAT section
Post by: Hurdy on December 21, 2009, 07:57:32 pm
As RedRobin does this, I thought I would too.

Took some more pics whilst the decat was being finished and I'll do a full write up later in the review section :P

What a way to treat a £*** Milltek. :scared:

(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fhurdy_album%2FDecat_Milltek%2FP1020079.jpg&hash=5c7ad8fb63e485ef5c5d6b865088f45702723e7b)

Ever seen inside one?

(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fhurdy_album%2FDecat_Milltek%2FP1020080.jpg&hash=61ad07f0986a089fc65046ee4d7c967c250482fb)

My stainless steel new pipe :drool:

(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fhurdy_album%2FDecat_Milltek%2FP1020084.jpg&hash=c29e644809f665f04b5e6a7d5b28dc3b25b4570f)

Great work from the guys at Statllers again :happy2:
Title: Re: Teaser pic - custom DECAT section
Post by: djhorace on December 21, 2009, 07:58:44 pm
Keeping a close eye on this  :happy2:
Title: Re: Teaser pic - custom DECAT section
Post by: MAT ED30 on December 21, 2009, 09:28:12 pm
What's in the Honda box ? I know those boxes anywhere lol
Title: Re: Teaser pic - custom DECAT section
Post by: Aparoon on December 21, 2009, 09:43:08 pm
Me too, the HONDA sticker on the box was a bit of a give away  :signLOL:

Is there much to be gained from doing the decat over the sport cat as I have been thinking about doing the same thing... I had a decat on my 1.8t but never had the sport cat so couldn't compare the 2  :rolleye:
Title: Re: Teaser pic - custom DECAT section
Post by: neg on December 21, 2009, 10:20:10 pm
Its hard to say, they say there an advantage in a sports cat but not so sure about a de-cat.

My mate has an RS4 which is de-cat'd - its bloody noisy thats for sure!
Title: Re: Teaser pic - custom DECAT section
Post by: jonnyc on December 21, 2009, 10:28:55 pm
Its the way forward..  :happy2:

(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fo304%2Fjonnnny28%2FIMG_0570.jpg&hash=54a333bec1014f355f2ad793fc3b7b0a8ffd3f76)

I have a CAT / Silencer / Straight pipe section all made up.. Worth thinking about a silencer pipe if its too loud also.. I really doubt it will be with a Milltek rear though..
Title: Re: Teaser pic - custom DECAT section
Post by: keith on December 21, 2009, 10:32:43 pm
Its the way forward..  :happy2:

(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fo304%2Fjonnnny28%2FIMG_0570.jpg&hash=54a333bec1014f355f2ad793fc3b7b0a8ffd3f76)

I have a CAT / Silencer / Straight pipe section all made up.. Worth thinking about a silencer pipe if its too loud also.. I really doubt it will be with a Milltek rear though..

Lol that looks like a Bong :grin:
Title: Re: Teaser pic - custom DECAT section
Post by: Aparoon on December 21, 2009, 10:40:47 pm
I have a 3'' dp mated to the standard cat back so it shouldnt be too loud! Would a 3'' cat back benefit me performance wise or just add to noise, I like it as it is but i'm always up for a little bit more power ...
Title: Re: Teaser pic - custom DECAT section
Post by: jonnyc on December 21, 2009, 10:43:26 pm
I have a 3'' dp mated to the standard cat back so it shouldnt be too loud! Would a 3'' cat back benefit me performance wise or just add to noise, I like it as it is but i'm always up for a little bit more power ...

For sure, but you will gain LOTS more noise compared to a stock cat back.. Its always the same, to really get the BEST out of the car you need to do everything to the max, but it depends what your after, you could compromise with a Milltek system, which wont quite give the gains of a 3" (not much less) but lots less noise..
Title: Re: Teaser pic - custom DECAT section
Post by: Aparoon on December 21, 2009, 10:55:28 pm
So if i was to go with the blueflame (3'' I believe) it would be considerably louder and perform better even with a stage 2 map? I want the noise to a certain degree...
Title: Re: Teaser pic - custom DECAT section
Post by: jonnyc on December 21, 2009, 10:56:40 pm
So if i was to go with the blueflame (3'' I believe) it would be considerably louder and perform better even with a stage 2 map? I want the noise to a certain degree...

Cant really comment on the Blueflame, think thats what Mat runs, sure he will be along to help soon.. As far as I know its not 'too' loud really, probs what your after if you want some more noise really..
Title: Re: Teaser pic - custom DECAT section
Post by: Aparoon on December 21, 2009, 11:02:26 pm
Cheers buddy,  I will look into after Chritmas if the gf is still speaking to me...  :wink:
Title: Re: Teaser pic - custom DECAT section
Post by: Beddie on December 21, 2009, 11:04:18 pm
Cheers buddy,  I will look into after Chritmas if the gf is still speaking to me...  :wink:

I'll get emma to make up the spare bed...  :grin:
Title: Re: Teaser pic - custom DECAT section
Post by: jonnyc on December 21, 2009, 11:04:57 pm
Cheers buddy,  I will look into after Chritmas if the gf is still speaking to me...  :wink:

The beauty of a f*cking loud car.. Peace and quiet!.. Until you arrive wherever you were heading to anyways..  :wink:
Title: Re: Teaser pic - custom DECAT section
Post by: Aparoon on December 21, 2009, 11:08:34 pm
Thats the thing, I usually just do things and dont tell her, she doesnt't even notice half the time  :signLOL:

Struggle to hide the exhaust though...  :sad1:
Title: Re: Teaser pic - custom DECAT section
Post by: Hurdy on December 21, 2009, 11:56:21 pm
Under normal driving the decat doesn't appear to much louder in conjunction with the Milltek resonated back section. The non-res will have more sound to add, but I doubt it will be too loud unless you push the go fast pedal and push the revs out. At which point it will pop more. I've been told that it will spit out the odd flame too under max load overrrun :evilgrin:
Title: Re: Teaser pic - custom DECAT section
Post by: tony_danza on December 22, 2009, 11:01:34 am
How much is that costing you to do, given I only paid £300 for my 3" decat from Milltek? Just as an idea of a cost comparison.
Title: Re: Teaser pic - custom DECAT section
Post by: Hurdy on December 22, 2009, 12:46:44 pm
Not far off the same, around £40 cheaper at £260 fitted.

Isn't the decat from Milltek a complete section from the turbo to the back section though?
Title: Re: Teaser pic - custom DECAT section
Post by: djhorace on December 22, 2009, 12:56:53 pm
Yep. This makes it a pain in the hoop come MOT time.
Title: Re: Teaser pic - custom DECAT section
Post by: tony_danza on December 22, 2009, 01:04:51 pm
Not far off the same, around £40 cheaper at £260 fitted.

Isn't the decat from Milltek a complete section from the turbo to the back section though?

Yep, it's a big old bit of pipe.
Title: Re: Teaser pic - custom DECAT section
Post by: djhorace on December 22, 2009, 03:14:43 pm
I am going to price up a downpipe from Powerflow to be 3 inches top to bottom and include a removable cat before I do this I think, just to see which is more cost effective.
Title: Re: Teaser pic - custom DECAT section
Post by: tony_danza on December 22, 2009, 03:21:38 pm
Might be worth checking what the MOT rules are?

Is it the physical existence of a cat, or just the emmisons?.... because it might actually still pass without one.
Title: Re: Teaser pic - custom DECAT section
Post by: jonnyc on December 22, 2009, 03:23:23 pm
Might be worth checking what the MOT rules are?

Is it the physical existence of a cat, or just the emmisons?.... because it might actually still pass without one.

Just emissions as far as I know.. Some cars will pass without no problem.. Civic Type R's always did..
Title: Re: Teaser pic - custom DECAT section
Post by: Aparoon on December 22, 2009, 03:27:11 pm
I was told that on our cars a 100cell race cat  will pass an mot, surely the difference between 100cell cat and decat would be negligable so easier to just run one of them all the time  :rolleye:
Title: Re: Teaser pic - custom DECAT section
Post by: Hurdy on December 22, 2009, 04:49:46 pm
I have 3 options

1. Decat
2. Milltek 200 cell cat
3 Still have the OEM system

Personally I didn't need yet another system.

There are alternatives that I'd considered, but none were really as practical. :happy2:
Title: Re: Teaser pic - custom DECAT section
Post by: RedRobin on December 22, 2009, 05:18:54 pm
I have 3 options

1. Decat
2. Milltek 200 cell cat
3  Still have the OEM system


....Wouldn't the OEM system hold back and not exploit the benefits of your remap and other mods?
Title: Re: Teaser pic - custom DECAT section
Post by: MAT ED30 on December 22, 2009, 06:09:21 pm
So if i was to go with the blueflame (3'' I believe) it would be considerably louder and perform better even with a stage 2 map? I want the noise to a certain degree...

Cant really comment on the Blueflame, think thats what Mat runs, sure he will be along to help soon.. As far as I know its not 'too' loud really, probs what your after if you want some more noise really..

u rang  :laugh:

its only loud when u put your foot down  :evilgrin: and driven gentle its very nice and subtle ish but i for one love it and a few other members that have gone the same route have loved it and if u ask me it sounds so much meaner than the milltek and its a full 3"" system not like the milltek
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fd122%2Fmat138l%2Fbluflamenewdownpipe.jpg&hash=6c9334cfd9019a5cf013419b9eae006c07df78e8)

(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fd122%2Fmat138l%2Fblueflame3.jpg&hash=91538be37d59778e0c41f64587720a0d04c83c06)
Title: Re: Teaser pic - custom DECAT section
Post by: tony_danza on December 22, 2009, 06:17:19 pm
Might be worth checking what the MOT rules are?

Is it the physical existence of a cat, or just the emmisons?.... because it might actually still pass without one.

Just emissions as far as I know.. Some cars will pass without no problem.. Civic Type R's always did..

Thought as much, most do as far as I've heard, so long as the mapping is corrected properly to deal with it  :happy2:
Title: Re: Teaser pic - custom DECAT section
Post by: animal on December 22, 2009, 06:36:16 pm
Might be worth checking what the MOT rules are?

Is it the physical existence of a cat, or just the emmisons?.... because it might actually still pass without one.

Just emissions as far as I know.. Some cars will pass without no problem.. Civic Type R's always did..

Thought as much, most do as far as I've heard, so long as the mapping is corrected properly to deal with it  :happy2:

Perhaps you could request Revo write a map that drops the emissions low enough sans-cat to pass an MoT? Loading an 'emissions test' map would be a lot easier than having to replace the cat every year.

I'm not sure who offers the choice of using the cruise stalk to change between maps (GIAC?) but you could one step further and have the emissions test map preloaded on the ECU. Then, on the off chance you ever get pulled for a road side test, at the flick of a switch, you'd pass and be on your way (will just a retification order for a defective - read: too noisey - exhaust).
Title: Re: Teaser pic - custom DECAT section
Post by: Hurdy on December 22, 2009, 07:31:31 pm
Might be worth checking what the MOT rules are?

Is it the physical existence of a cat, or just the emmisons?.... because it might actually still pass without one.

Just emissions as far as I know.. Some cars will pass without no problem.. Civic Type R's always did..

Thought as much, most do as far as I've heard, so long as the mapping is corrected properly to deal with it  :happy2:

Perhaps you could request Revo write a map that drops the emissions low enough sans-cat to pass an MoT? Loading an 'emissions test' map would be a lot easier than having to replace the cat every year.

I'm not sure who offers the choice of using the cruise stalk to change between maps (GIAC?) but you could one step further and have the emissions test map preloaded on the ECU. Then, on the off chance you ever get pulled for a road side test, at the flick of a switch, you'd pass and be on your way (will just a retification order for a defective - read: too noisey - exhaust).

That sounds like an excellent idea :happy2:


The Review is done now and in the review section :happy2:

http://www.mk5golfgti.co.uk/forum/index.php?topic=10109.msg155448#msg155448
Title: Re: Teaser pic - custom DECAT section
Post by: Hurdy on December 23, 2009, 06:01:13 pm
Dyno plot of before and after now updated on the review :happy2:
Title: Re: Teaser pic - custom DECAT section
Post by: Janner_Sy on December 23, 2009, 09:53:43 pm
cant see them in the review section yet mate :happy2:
Title: Re: Teaser pic - custom DECAT section
Post by: Hurdy on December 23, 2009, 11:57:26 pm
cant see them in the review section yet mate :happy2:

Sorted :happy2: