Milltek question ?

[markymark]

So when VWR offer there performance upgrade package what does this include? I thought it was a remap and a Milltek/VWR Cat Back?

[Greeners]

So when VWR offer there performance upgrade package what does this include? I thought it was a remap and a Milltek/VWR Cat Back?

Good point! 

[QD MBE]

So when VWR offer there performance upgrade package what does this include? I thought it was a remap and a Milltek/VWR Cat Back?

Good point! 

Don't get mixed up.

If you put a cat back onto an OEM cat, the restricting factor is the OEM cat, which is ok, it will have no effect on the Milltek system.  If however yoiu fit a Milltek DP and cat onto an OEM cat back, the restricting factor becomes the OEM cat back, which will reduce the free flow allowed through the Cat due to the increased back pressure due to less free-flowing OEM system, this will increase the stress on the cat due to higher temperatures.

 

[markymark]

So when VWR offer there performance upgrade package what does this include? I thought it was a remap and a Milltek/VWR Cat Back?

Good point! 

Don't get mixed up.

If you put a cat back onto an OEM cat, the restricting factor is the OEM cat, which is ok, it will have no effect on the Milltek system.  If however yoiu fit a Milltek DP and cat onto an OEM cat back, the restricting factor becomes the OEM cat back, which will reduce the free flow allowed through the Cat due to the increased back pressure due to less free-flowing OEM system, this will increase the stress on the cat due to higher temperatures.

 

Thanks for clearing that up Dave, I think that fact was getting confused further up. I must admit I didnt see an issue mating an OEM Cat with a Milltek Cat Back!

[Greeners]

So when VWR offer there performance upgrade package what does this include? I thought it was a remap and a Milltek/VWR Cat Back?

Good point! 

Don't get mixed up.

If you put a cat back onto an OEM cat, the restricting factor is the OEM cat, which is ok, it will have no effect on the Milltek system.  If however yoiu fit a Milltek DP and cat onto an OEM cat back, the restricting factor becomes the OEM cat back, which will reduce the free flow allowed through the Cat due to the increased back pressure due to less free-flowing OEM system, this will increase the stress on the cat due to higher temperatures.

 

Thanks for clearing that up Dave, I think that fact was getting confused further up. I must admit I didnt see an issue mating an OEM Cat with a Milltek Cat Back!

Same here! Never heard of anyone putting a DP on a standard BB? 

[QD MBE]

Looking at fitting a milltek sports cat to my standard edition 30 exhaust system and am wondering what is required. Am i right in thinking i need the connecting pipe AND an a reducer to fit my original mid section ? 

Kev

OP

 

[Greeners]

Looking at fitting a milltek sports cat to my standard edition 30 exhaust system and am wondering what is required. Am i right in thinking i need the connecting pipe AND an a reducer to fit my original mid section ? 

Kev

OP

 

 

[candy turbo]

So when VWR offer there performance upgrade package what does this include? I thought it was a remap and a Milltek/VWR Cat Back?

Good point! 

Don't get mixed up.

If you put a cat back onto an OEM cat, the restricting factor is the OEM cat, which is ok, it will have no effect on the Milltek system.  If however yoiu fit a Milltek DP and cat onto an OEM cat back, the restricting factor becomes the OEM cat back, which will reduce the free flow allowed through the Cat due to the increased back pressure due to less free-flowing OEM system, this will increase the stress on the cat due to higher temperatures.

 

at last some one understands     quite a few guys on audi sport have fitted the dp/cat on to oem cat back cause its supposedly a free flowing system and keeps oem look

[jmspear]

Does anyone know / have any experience of how restrictive the OE rear box actually is? In my experience of Porsche (completely different I know) systems very little performance (back pressure) difference between OE and aftermarket, mainly weight (a/m lighter) sound differences (a/m sportier = louder) and look, big oval tips etc.

I was actually looking at mating a sports cat / dp to an OEM back box because I want to keep as near as possible to OE sound (the wife drives the car a lot and refuses to drive my 993 with an a/m exhaust as she hates (with a passion) anything that makes any noise at all, and she uses the golf a lot so it must be as quiet as possible (but also as fast as possible  )
and I want to not spend too many pennies.

I has assummed that the main point of the cat back exhaust was sound and looks as doesn't offer any real bhp benefit on its own (but maybe because the system is choked by the cat, and when the cat freed up the box becomes the choke??)

Am I completely mad sticking with the oe back box? Will it fry my cat and choke the stage 2 map? (tuning plan is ITG, Milltek sport cat / dp mated to OE system and superchips stage 2 remap to get about 260 HP)

Thanks

(wifes noise requirements (like none) are very high on the priority list, but not as high as my need for speed)

[MAT ED30]

defo dont get an open cone filter as they are loud and u can mate the dp + cat to oe back box easy and should sound good but not too loud

[RedRobin]

(wifes noise requirements (like none) are very high on the priority list, but not as high as my need for speed)

....So which electric supercar are you getting? 

A Warm Welcome to the forum, btw 

[jmspear]

Thanks for the welcome. Yes if I could afford it a tesla would be nice (and a long extension lead  )

I also have a black ed 30 with stage one superchips which I love as my daily driver, but wife is using this more and more and I get relegated to the std GTI so am looking to give it some more beans as it feels anaemic next to my (hers now?) superchipped ed 30

[gobbleplease]

Jesus 2 gtis ? are they the same colour, maybe you could swap number plates and badges and she wouldnt notice.

Yea porsches are a differant ball game mate, they generally are built to flow really well so gains from an exhaust are pretty hard to achieve

Turbo cars though, love exhuasts and filters. Ive got a blueflame exhaust and will be mating it to an itg, i dont think they are the quietest in the world though as mentioned,

I would say though from my memories that the miltek i had looked better quality than the BF

[jmspear]

I just love GTI's. Both are five doors, the ed 30 diamond black with tinted rear windows, the wifes GTI is red, the only mod on her one so far is - wait for it - a tow bar for my trials bikes, yes I love anything with an engine, have trials bikes, enduro ktm, 2 x gti's and a very heavily modded track 993, which I have had for 15 years and been modding for 10!!!). I used to have a car import business and specialised in A3's and GTI's GT TDI's (Mk IV and V) until the bottom fell out of the Euro, hence the VAG addiction.

She definitely notices the power difference, she likes the power more than me, just a bit shy and retiring (very stealth) hence wants it to be quiet. One of those quiet shy women drivers in the family car full of kids until you try and overtake, then bham, she unleashes the right foot. With all its mods my 993 runs 0 - 60 in 4.5s and tops out about 175 (tested at elvington on ax22 datalogger) she drove it back from the mot last week (she hadn't been in it for months) and said "Actually I had forgotten how much fun your porker was (   ) just too noisy.

Thanks for advice on exhausts (going back to the post) but will i fry the cat if i keep the std back box?

[gobbleplease]

^^^^^^
Yip good little cars the gtis, i had a couple of m3s since my mk4 gti and forgot how fun they are, i love mine