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Author Topic: Pre Cat removal  (Read 35928 times)

Offline JMP

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Re: Pre Cat removal
« Reply #30 on: October 03, 2011, 08:50:10 pm »
I noticed a nice improvement also in my fuel comsumption and the car just rolls so easy when your off the throttle.
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Offline 56OctyVRS

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Re: Pre Cat removal
« Reply #31 on: October 04, 2011, 10:38:58 am »
Quote from: Tfsi_Mike on October 03, 2011, 06:39:57 pm

Is the SFS hose the same part as the Neuspeed ones? What's your thought on it?

My thoughts are the SFS hoses are much better as each hose is one piece and not in tiny sections like OE pipes.  I had the neuspeed hi flo intercooler pipe and the SFS hose is wider even though it has a slighty squashed side in it to avoid the radiator fans.  The turbo to i/c pipe does not have that bend in it and is a straight pipe, so flow should be quicker.  The hoses are made from very thick silicone so build quality is top notch and since fitting them the engine revs and pulls so much easier. Its given the engine more grunt over the whole rev range.  All in all they are expensive but worth it.  I paid a lot less as I purchased them through here from a top bloke :happy2:   

Matt
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Offline GTI-Ross

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Re: Pre Cat removal
« Reply #32 on: December 01, 2012, 04:16:23 pm »
Me and a friend had a go at this today, started un-tightening the 1st bolt (one you can see from engine bay) felt real tight, we tried WD40 (left for 10mins) still felt tight.

so heated up with blow torch, got a few turn out of it but still was really tight, my mate said it feels like itmight snap....i have heard a few people mention this

Anyone have a link to get a replacement bolt and seal kit?....or just buy straight from VW

Thanks guys
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Offline PDT

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Re: Pre Cat removal
« Reply #33 on: December 01, 2012, 04:32:45 pm »
I use a wire brush on them for 2-3 mins add plenty of duck oil and if they go tight just keep going back and forth.

Must have undone 400+ of these nuts and only ever had 1 snap (on a 2 month old Audi TT which was odd :confused: )
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Offline GTI-Ross

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Re: Pre Cat removal
« Reply #34 on: December 01, 2012, 06:06:42 pm »
Quote from: PDT on December 01, 2012, 04:32:45 pm
I use a wire brush on them for 2-3 mins add plenty of duck oil and if they go tight just keep going back and forth.

Must have undone 400+ of these nuts and only ever had 1 snap (on a 2 month old Audi TT which was odd :confused: )

Duck Oil?  Never used that...WD40 no good for this job. Where can i get duck oil?

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MK5 GTI - DSG + Extras (Sold because DSG was Soooo Boring !!!)

Offline the bruce

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Re: Pre Cat removal
« Reply #35 on: December 01, 2012, 06:46:49 pm »
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Offline GTI-Ross

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Re: Pre Cat removal
« Reply #36 on: December 01, 2012, 10:08:11 pm »
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MK5 GTI - DSG + Extras (Sold because DSG was Soooo Boring !!!)

Offline GTI-Ross

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Re: Pre Cat removal
« Reply #37 on: December 02, 2012, 05:50:51 pm »
So i finally got arounf to removing my pre-cat with my mate today. And wow, what a difference. For 2 hours labour, you wont get a better mod.

Bit of a ball ache removing all the bolts (used 3 in 1 penatration oil form Halford - worked awsesome on the rust)

once chipped out and stapped back on. started it up and straight away got a really nice burble on down revs. Took it for a spin, cant believe how more responsive it felt for a such a small cat removal.......Just need my re-map now  :pomppomp:

Find some quick pics below:

.

.
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MK5 GTI - DSG + Extras (Sold because DSG was Soooo Boring !!!)

Offline PDT

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Re: Pre Cat removal
« Reply #38 on: December 06, 2012, 07:41:06 pm »
Top class bodging there Ross!

Your findings are he same as most customers of ours that ave this done or DIY it, really worthwhile budget modification.
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Offline GTI-Ross

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Re: Pre Cat removal
« Reply #39 on: December 06, 2012, 08:55:15 pm »
Quote from: PDT on December 06, 2012, 07:41:06 pm
Top class bodging there Ross!

Your findings are he same as most customers of ours that ave this done or DIY it, really worthwhile budget modification.

thanks to your great help and advice  :drinking:

Sorry to take that bit of extra money off you when i come see you.....still getting my map with you, hopefully within the month, cant wait  :party: :party: :party:
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MK6 GTI CSG | Revo Stage 2 | Revo Stage 2 Intake | VWR SubFrame Mount | VibraTechnics Upper Engine Mount | VibraTechnic Transmission Mount | SuperPro Anti Lift Kit | H&R ARB's | Bilstein B12 | TT Short Shifter |Mintex M1144 Race Pads | HEL Braided Lines |

MK5 GTI - DSG + Extras (Sold because DSG was Soooo Boring !!!)

Offline aslz78

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Re: Pre Cat removal
« Reply #40 on: December 10, 2012, 06:11:58 pm »
Still not sure if i'm quite brave enough for this mod yet!
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Offline GTI-Ross

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Re: Pre Cat removal
« Reply #41 on: December 10, 2012, 06:19:51 pm »
Quote from: aslz78 on December 10, 2012, 06:11:58 pm
Still not sure if i'm quite brave enough for this mod yet!

Easy as pie mate, just set a side a max of 3 hours (just in case),  and just make sure you have the correct tools and you will be fine.
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MK5 GTI - DSG + Extras (Sold because DSG was Soooo Boring !!!)

Offline Timvgti

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Re: Pre Cat removal
« Reply #42 on: January 14, 2013, 03:50:48 pm »
I'm planning a pre-cat removal 'groupbuy' on the Dutch GTI forum (because I know a good company/guy that wants to remove them for a very good price, included new gasket).

I've heard that sometimes the engine light goes on, especially with cold weather/cold engine. Is this true? Who has experienced this problem (with a stock mk5 GTI, only ABT remap)?
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Offline zerolag

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Re: Pre Cat removal
« Reply #43 on: January 14, 2013, 04:10:37 pm »
I've run the pre-cat delete for some time now, and never had a warning on the dash.  Stock or Stage 1 map.  Removing that pre-cat brick wall really helps the turbo out I feel, lowering the turbine temps has gotta to be worthwhile for longevity.

For those wanting to do this, just make sure you get some penetration oil / spray - job is tonnes easier on a lift :)
Grab a new gasket too, think they are about £4-£5 from VW.
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Offline Timvgti

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Re: Pre Cat removal
« Reply #44 on: January 14, 2013, 04:15:14 pm »
Quote from: zerolag on January 14, 2013, 04:10:37 pm
I've run the pre-cat delete for some time now, and never had a warning on the dash.  Stock or Stage 1 map.  Removing that pre-cat brick wall really helps the turbo out I feel, lowering the turbine temps has gotta to be worthwhile for longevity.

For those wanting to do this, just make sure you get some penetration oil / spray - job is tonnes easier on a lift :)
Grab a new gasket too, think they are about £4-£5 from VW.

So you've never seen the engine management light? Also no with these winter-temps?
So no downsides for this mod?
Have you also noticed a better fuel consumption?
What's the most noticeable? -> The quicker/better gas response? The sound? The fuel consumption? The bhp?
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