cat efficiency codes, cats and spacers

[noone]

I've played with the N75, J's, a swapped out version, MBC's, etc. Unless its not working properly, the stock one is best.
The turbo is small, its not going to flow strongly above 4500rpm, my Polo is super torquey from 2500-4000rpm, thats where the fun-band is with the stock turbo.

[sambb]

My problem though is that my tune doesn't match my hardware anymore and so the stock N75 isn't coping. So if there's an N75 out there that can get more pressure into the wastegate for a given amount of closed time/duty cycle then it will probably help me control initial spool up better. For example on vortex threads people that had surging issues were swapping to different suffix N75's and their surging would stop ( I think it was the "J"), and the ECS N75 race (which apparently is just a rebranded "H" suffix VAG N75) has much bigger I.D's so controls bigger pressures differently. You had an N75 race at one stage didn't you noone?

[Dugle]

The dump pipe combined with the 200 cell cat will cause a CEL. Happened to me after laps at Lakeside about 4 days after installation.

I had no CEL problem with my dump and 200 cell cat before tune, maybe it's due to me not doing laps.

[sambb]

Do you have a 2nd cat sensor spacer?

[Paazuzu]

I had no CEL problem with my dump and 200 cell cat before tune, maybe it's due to me not doing laps.

Fair enough mate, I stand corrected. Mine was fine for about a week and then I went to laps and it threw the code.

[sambb]

Does anyone have the part number for the stock N75 on our car? Mines an 06' and only has 'eaton' written on it with the number 6Q0906283 and EM3 written below that. I don't see the 'J', 'K' etc suffix that n75 part numbers apparently have. Unless its what we already have, I'm on the hunt for a 058 906 283 with the 'C' or 'F' suffix. Anyone got one laying around?