MK5 Golf GTI

All Things Mk5 => Modifications & Technical Area => Performance Modifications => Topic started by: Berry on February 20, 2016, 04:56:37 pm

Title: Pre cat delete done today!
Post by: Berry on February 20, 2016, 04:56:37 pm
Hey chaps.

So after some deliberation I'm set on R-Teching mine after she's had a service and Mot in a couple of weeks. But thinking of first doing a pre cat delete. My one concern is when youtubing pre cat delete videos, some sound pretty much standard but others sound considerably more 'buzzy' which I'm not keen on. But just not sure if that's simply down to what camera/phone they've used!

What's your opinions? I don't mind a bit more 'grunt' but not 'buzz'... If that makes sense...

Cheers guys, love this forum for endless experience, guidance and wisdom!  :drinking:
Title: Re: Pre cat delete noise?
Post by: GTI-Ross on February 20, 2016, 05:03:03 pm
Hey chaps.

So after some deliberation I'm set on R-Teching mine after she's had a service and Mot in a couple of weeks. But thinking of first doing a pre cat delete. My one concern is when youtubing pre cat delete videos, some sound pretty much standard but others sound considerably more 'buzzy' which I'm not keen on. But just not sure if that's simply down to what camera/phone they've used!

What's your opinions? I don't mind a bit more 'grunt' but not 'buzz'... If that makes sense...

Cheers guys, love this forum for endless experience, guidance and wisdom!  :drinking:

Just makes it a little deeper, no buzzing noise. That will just be the camera mate.
Title: Re: Pre cat delete noise?
Post by: Neil 54 on February 20, 2016, 07:03:53 pm
As above when I had mine taken out just a nice deeper sound
Title: Re: Pre cat delete noise?
Post by: white91 on February 20, 2016, 07:42:12 pm
Mine starting popping a little when I took mine out


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Title: Re: Pre cat delete noise?
Post by: PhilNUK on February 20, 2016, 07:54:17 pm
yep I found mine gave a much deeper sound and I was pleased as its all I wanted really.
Title: Re: Pre cat delete noise?
Post by: Berry on February 21, 2016, 06:32:30 pm
Brilliant that's what I'm after in that case thanks guys. Now convinced my mechanic to do it next Tuesday along with a Millers nanodrive oil service.

Title: Re: Pre cat delete noise?
Post by: Markis236 on February 21, 2016, 06:57:22 pm
Intrested in doing this but will it through up a warning light for it being removed ?
Title: Re: Pre cat delete noise?
Post by: Berry on February 21, 2016, 07:05:36 pm
No apparently not, and countless people have done it. Passes an MOT fine too.
It's there for the European market where their equivalent MOT test tests for cold start emissions but ours doesn't  :smiley:
Title: Re: Pre cat delete noise?
Post by: Markis236 on February 22, 2016, 06:47:01 pm
Doesn't matter just ended up buy a full 3" miltek race system for 1/3 of the price haha :rolleye:
Title: Re: Pre cat delete noise?
Post by: Berry on March 01, 2016, 12:04:54 pm
This is being done today :D

Do any of you know if I'll need any tweaks to the ECU for this???
Title: Re: Pre cat delete noise?
Post by: Dave(tm) on March 01, 2016, 01:36:01 pm
This is being done today :D

Do any of you know if I'll need any tweaks to the ECU for this???

Nope you'll be absolutely fine.

Plenty of tweaking to get the best out of it when you get to R-TECH :)

Dave
Title: Re: Pre cat delete noise?
Post by: Berry on March 01, 2016, 01:42:36 pm
Lovely stuff  :happy2: cheers Dave
Title: Re: Pre cat delete done today!
Post by: Berry on March 01, 2016, 09:11:24 pm
Got the car back today after the pre cat delete and theres a surprising amount of difference, definitely a quicker turbo spool up and more turbo 'whoosh'.  But in no way does this, or the slightly deeper exhaust note sound chavvy. Not fully put it through its paces yet but after initial testing I certainly felt better acceleration. Of course the service with Millers Nano drive as opposed to OEM oil may have helped too... Anyway, well chuffed with the results.

My mechanic had a right mare getting that top bolt off though, but did manage with a breaker bar and was able to grease up and reuse all bolts and gasket.
Charged me £90  :happy2:

Ready for R-Tech now  :smiley:

Title: Re: Pre cat delete done today!
Post by: K2 NYJ on March 24, 2016, 02:28:56 am
Hi all,
Do all ages of mk5 gti's have the pre-cat fitted?
Title: Re: Pre cat delete done today!
Post by: Berry on March 24, 2016, 05:26:59 pm
Hi all,
Do all ages of mk5 gti's have the pre-cat fitted?

Yes all Mk5 GTI's certainly do.
Title: Re: Pre cat delete done today!
Post by: shoaybmakda on March 24, 2016, 08:12:10 pm
Really want to do this on mine but worried I won't be able to get the pipe from the turbo off.
Title: Re: Pre cat delete done today!
Post by: Golf2286 on March 24, 2016, 09:03:57 pm
It's really easy to do I did both my cats in 1 hour and it pops and bangs. Sounds great too  :grin: