Polo GTI - Custom made dump pipe

[noone]

Hi Guys,

Is there any significant gains if one decided to go for 2.5" downpipe and catless? Assuming the reflash is stg2, having the cat cell delete parameter.

I have asked this question, there is not an awful lot of info to be found on here providing real detail.

On saying that, this is what I know:

The dump pipe is restrictive. a 2.5" with quality mendrel bends provides enough flow for aprox 180-200 kw (or so I have read). some estimates of 6kw more power.

Hi flow cat is not required and a full exhaust after the dump may only add another few kw.

you mention stage 2, you mean with a bigger turbo? If you are changing the turbo, I would suggest 3" dump, but it depends on the application.

[Buller_Scott]

hey noone what did you have done? dump pipe/ de-muff and using the stock cat?

[firdausasri]

Break,

Yeah I've heard legal issues running catless in Aussie but in Malaysia there's none (except exhaust noise must not exceed certain decibels).

Noone,

Stg 2 mapping, still using K03S turbo, just more aggressive maps, bigger injectors and 3.5/4bar fpr. So in that respect, I'm going to try 2.5" downpipe.

[Sharkie]

Actually, no... no it isn't.

If you're happy with mild steel you can get it even cheaper still. $300 for a quality dump pipe is certainly possible, and given enough bargaining you could even squeeze a full turbo back system including a high flow cat for just under $1,000.

Err ... actually .... yes it is ... a quality cat costs more than $300 all by itself, add in some labour at $60/hour (for 3 hours) , quality flex and quality stainless tubing and you'd be looking at well over $600 ....

Don't propagate dribble please .....

[Servo]

Err ... actually .... yes it is ... a quality cat costs more than $300 all by itself, add in some labour at $60/hour (for 3 hours) , quality flex and quality stainless tubing and you'd be looking at well over $600 ....

I was quoted $600 for the hiflo cat by itself and that's from 2 exhaust place down here. If I can find someone who can do a 2.5' full system for about $1500 with a hiflo cat I'd jump on it.

[h100vw]

The 3 inch system I had on my A3 was $1600. A downpipe would be around half the cost on it's own.

I don't see anywhere doing one for $500, except for a mate.

Gavin

[Servo]

The 3 inch system I had on my A3 was $1600. A downpipe would be around half the cost on it's own.

I don't see anywhere doing one for $500, except for a mate.

Gavin

Is that including the hiflow cat?

[h100vw]

Is that including the hiflow cat?

Turbo back inc cat.

http://www.aseturbo.com/index.php

[Buller_Scott]

but what about all the peeps on here who've alluded to getting custom 2.5inch mandrel dumps for $500 or less? i can recall a few folks saying they got theirs for between $350-$450...

[Jmac]

Who did??? cant see u getting anything around that mark, agreed Gav. Keep an eye on the exchange rate and maybe word up Blueflame in he UK.Ive done a full system turbo back on a high horse TT and was very reasonable landed,ill check the cost, Ian Birch of Blueflame was The Man an Dubsport back in the day, of twin engine dub fame. ill word up a couple of dudes back home.
Jmac

[Buller_Scott]

jmac- i cant be too sure who it was- maybe whubbsie or noone? if anyone wants to pipe up it'll help as i could swear i've seen people come in under 500 (dump pipe only).

i think someone may have alluded to muffler man in melbourne, and getting away for less than that with mild steel.

empty post, i know, but it was a while ago and i swear i swear i swear (for the custom-made non-apr-or-milltek boys).

[Timbo]

I'll happily pipe up (boom, tish!)

First, I had a flow test done on the stock system. This found that the most restrictive part of the exhaust is from the turbo to the cat, ie, around the bend. Based on this, my fabricator built a 3" pipe from turbo to cat, and retained the stock cat, which flows fine for the KO3. This gave me a good additional 12KwATW, as measured on two dynos. It cost me well less than $600. I posted a thread on this a couple of years ago. I can't imagine prices will have moved much further in that time. The fabricator has a great reputation in Canberra and used quality steel (not stainless though, unnecessary)

Read all about it!

[Jmac]

Thats the way mate we need the info!!!
Jmac

[Buller_Scott]

yeah i quite enjoyed the 3'' or not to 3'' thread. cheers timbo! this is pretty much what i'll be looking at doing- cant decide between 2.5'' and 3'', but either way, that, and mufflerectomotomy.

cheers!

[noone]

hey noone what did you have done? dump pipe/ de-muff and using the stock cat?

just the dump. I had my muffler tips changed a while back, but thats just for looks.

Break,

Yeah I've heard legal issues running catless in Aussie but in Malaysia there's none (except exhaust noise must not exceed certain decibels).

Noone,

Stg 2 mapping, still using K03S turbo, just more aggressive maps, bigger injectors and 3.5/4bar fpr. So in that respect, I'm going to try 2.5" downpipe.

Sounds like CC. I may go down that path myself, I believe you need the Seat intake / pod filter to do this, also the TIP and FMIC are recomended... From memory.

I was quoted $600 for the hiflo cat by itself and that's from 2 exhaust place down here. If I can find someone who can do a 2.5' full system for about $1500 with a hiflo cat I'd jump on it.

I was reading on the Autospeed website about getting a 2nd hand one from a XR6T or something similar. Free flowing design and a fraction of the cost of a new hiflow one (assuming it fits).