Pre-cat. . . . . REMOVED!

[daz_pd]

it can only help really

[GrayMK5GTI]

Nick @ R-tech advised when I had mine done it would lower EGT's 

Ideally you need a free flowing (decat) exhaust for best gains

[zerolag]

@daz_pd: Thanks... is it enough to keep Stage 2 EGT's to a reasonable level?  The shear cost of DP and sports cat make this mod a blessing if it can do the job.

@GrayMK5GTI: Thanks... definitely, but want to keep those costs down if possible :)

Guess I'll just get it done then do some logging on VCDS... is the VCDS EGT calculation accurate?  I'm peaking at 900*C at 22PSI, eek.

[daz_pd]

depends how hard you drive it, with an occasional short blast it would be ok, but for any kind of prolonged hard use you need the downpipe really (you will also gain more power). few people see to do ok with cheaper brands eg:http://www.ebay.co.uk/itm/JETTA-MK5-2-0T-FSI-EXHAUST-DOWNPIPE-DE-CAT-3-2005-2009-/110625069262?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item19c1c498ce&_uhb=1

[PDT]

Have loads of EGT logs including a few from yesterday, will see if I can find some direct before/afters to post.

[zerolag]

@daz_pd: Mostly mixed driving but like boosting quite a bit, don't see much high revving.
Thanks for the link to that DP... my only concern is the emissions for MOT.

PDT: Cheers, that would be really helpful... The spikes of 900*C worry me a bit.

[GTI-Ross]

defo looks like its worth the money....

[RobboGTI]

More info on mpg gains:

I always get 33 - 35mpg on the way to work, I'm now getting 35.5 - 37.5mpg.

On the way home from work I always get 38 - 40mpg, I'm now getting 42 - 44mpg.

Pretty good result!

Wtf??!!! On my commute to work I average 30-33mpg at best. Makes me feel like something is wrong with my car now :/

[GrayMK5GTI]

It's more than likely your driving style. To get good MPG you need to be very light with the throttle, easing off nice and early for roundabouts etc and maintaining a steady speed in the highest gear possible 

I regularly get 40+mpg on the motorway if I set the cruise control at 69-70mph (on the speedo).

Anyhooooo there's plenty of MPG threads on the forum to discuss this on 

[zerolag]

Does anyone have a standard DP with or without the Pre-Cat in, that they want to get rid of?
There's one on the forsale section but can't respond due to being too new.

[GrayMK5GTI]

just knock the pre-cat out of the one on your car. No one will ever know when you come to sell it 

[zerolag]

I don't really have the area or ramps to get the car in the air, so would be taking it to a garage, and after reading about someone doing this and then have bits of Pre-Cat stuck in their main Cat  I thought it better to buy one in, smash it out, make doubley sure myself then just get the garage to fit it.  Save their time too.

[zerolag]

Just to call back into this thread... I've had the pre-cat delete for a while now, brought the EGT's down more than I thought it would.  Did a quick run and the EGT's were down between 50-100*C!! over the same rev range.
You definitely hear the turbo more, and there is some degree of bass to the exhaust now.  I have a carbonio in there too since, but I don't think this adds very much tbh.. perhaps a few hp.  Will have to do some more runs with VCDS>

[GrayMK5GTI]

As I keep saying, this is a very worthwhile mod 

Glad more people are getting some benefit from doing it too 

[56OctyVRS]

@daz_pd: Mostly mixed driving but like boosting quite a bit, don't see much high revving.
Thanks for the link to that DP... my only concern is the emissions for MOT.

PDT: Cheers, that would be really helpful... The spikes of 900*C worry me a bit.

When I had my standard dp with the pre  cat delete it still sailed through the mot on emissions. Most people dont take the car for a blast and get the cat piping hot before mot's. The mot doesnt test cold start emissions so just get the cat warm and all will be fine.