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ED30 Decat - General Exhaust System

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tony_danza:
Fairly sure it's a second Lambda, I have no idea why? Not sure it can be played with in VCDS either, you'd need someone who can hack into the ECU??

I've just re-read properly, you've an ED30 and you're just looking to get 260bhp with an intake and a de-cat DP. You could just have it remapped and get 300bhp and a load more torque on your standard kit, it'd be less money.

JonnyC would be a decent person to ask as he swaps his DP for a decat one on track days & 1/4 miles (doddle to do), I'm pretty sure Revo have given him a specific map for doing so. 

pazz:
My apologies Tony, you're right about the second lambda sensor. Just spoken to a tuning company that I've taken previous non-VAG motors before who are actually VAG specialists.

He explained that the car runs a lambda sensor on the turbo outlet and a second lamdba further down. One monitors upstream with the other the downstream flow. Remove the cat and you put the system into limp mode as it records an imbalance in the up/downstream flow from stock.

So basicaly you have to map it to fool the lambda sensors.

tony_danza:
No need to apologise, but I knew it wasn't a simple "fix", which is a shame sadly.

There may be some other way around it with a dummy lambda which just gives a constant signal of whatever the ECU expects, I couldn't find much detailed info and I decided against it.

pazz:

--- Quote from: tony_danza on March 25, 2009, 02:05:52 pm ---I couldn't find much detailed info and I decided against it.

--- End quote ---

Well I can understand why, the bloke I've been speaking to just recommended I get a stage 1 map and if I come across some money go for a full system with high-flow cat.

Trouble is I didnt really want to damage the MPG as the car is a daily driver to work. So debating the whole modding idea now  :confused: A full system would be nice but then theres the fun of attracting buyers with an "aftermarket" exhuast.

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