2001 1.8t exhaust, what's everyone else got?

[lilcrash]

I've just noticed that my wifes beetle has a very under sized dump pipe and I'm just wondering what everyone has done about getting a proper sized exhaust. Is there a company in Australia that sells them? Ive been offered a custom made 2.5inch dump for $120.

Laterdays

[audi-tone]

$120 is a bargain! i paid atleast $2-250 for my custom 2.5 downpipe and another $200 for the catback

[h100vw]

They aren't undersized at standard power, there's plenty of flow. I had a 3 inch turbo back system made for my A3 4 years back which cost me $1600. At the time I considered that great value, with the work that went into it.

I'd be worried that $120 is far too cheap. Even if you know the outfit personally. It would take you best part of an hour to get the old one out. I can't see anyone being able to make one in less than a few hours.

2.5 inch would be plenty on an otherwise standard car. I am sure a tune is on your shopping list too, there won't be much of an change from the dp alone. Be wary of high flow cats too. I haven't seen many Turbo Beetles, so I don't know off the top of my head if they run 2 probes. The second one reports cat efficiency, on Polos they often cause fault codes. Stage/Phase 2 software deletes this problem.

Gavin

[lilcrash]

I know the guy that's why it's cheap. Yer it's got 2 oxygen sensors, high flow cats don't exist so I won't bother, if anything I will just slam a pipe through the cat that's on there to take the platinum out (only true high flow cat). Both the oxy sensors are before the cat so I assumed one was just an exhaust temp sensor to tell the ecu when the cat melts and blocks the flow. I've found a stainless 2.5inch dump on eBay for $150 delivered so I may take that option as it's direct fit, then il just get my guy to make a custom 2.5 system he's quoted less then $500 including a new cat if I want it. Thanks for the info.

Laterdays

[h100vw]

I am not aware of the 110kw/K03 engines having a temp sensor, only the K04s. So I think it would be a bad idea to assume that you can get away with knocking the guts out of the cat.
Not sure about your high flow cats not existing comment either. Metal Cat - The Hi-Flow Cat - Arguably the world's best high flow catalytic converter

Gavin

[lilcrash]

Cats are made to cause as little disruption as possible. In most exhaust parts catalogues standard and "high flow" cats have the same part number. I have had the argument enough times to accept that people can have there own opinion and waste there money how ever they feel necessary. Just in my opinion I am happy to buy a $200 cat with the same part number as the $550 "high flow" option.

What is this stage 2 software you mentioned?

Laterdays

[h100vw]

Phase 2 in Custom-Codes case provides for a few more KWs over the Phase 1, if you have fitted a downpipe, a bigger intercooler and maybe an intake. At the same time it is assumed, depending on the vehicle in question, that it may throw codes and a check light. This will be disabled if appropriate.

Just be sure you check what that second probe does, before you knock the guts out of the cat. It'll force a bandaid fix on the software if it's not a temp probe.

Do you know what the engine code is? On the sticker inside the service book.

Gavin

[lilcrash]

Eng code/ trans code - AWU EGX.

Its has a pod filter( was on there already) and I will fit a down pipe but an intercooler won't happen. There is a lack of space and my wife won't let me cause it will look silly

[h100vw]

Just had a look at ETKA and I can only see a lambda probe in the downpipe, before the cat. So you should be OK with the software. Looks like it may be a K03s which would be a bonus.
Gavin

[lilcrash]

I wonder what the 2nd sensor is then ???

[h100vw]

Is it in the downpipe or the manifold?

Picture of the 8L S3 std downpipe and a 3 inch one. These don't fit your Beetle but you can see both probes.

Google Image Result for http://www.thettshop.com/images/large/701475_1.jpg

[h100vw]

Google Image Result for http://www.more-bhp.com/user/9n3_cat.jpg

Is yours like this one?

[lilcrash]

Yer that looks like the same shape. The second sensor is in the cat. Probaly about 250-300 mm behind the first one. Whats the difference from a ko3 and a ko3s??

[h100vw]

They'll flow more air = more power when chipped. You could expect to see 15 extra hp from a K03s over a K03.

I will withdraw my earlier comment then, you need to check on software if you intend to do anything with the cat.

[lilcrash]

Ok Kewl. How much does chipping cost? And where can I get it done?