Quote:
Originally Posted by 3X3=5
I've already done the MPPK and Race Chip on my 35i, and it's pretty quick but I'm looking for a little more.
For those that have done a catless downpipe on their 35i, do you find that there is increased exhaust smell? If so is it bothersome? I've read the check engine light may (or may not) come on at times. Has anyone found any kind of plug in module/override for this? It sounds like there's a significant power gain to be had with a catless downpipe, but I don't want to end up with a smelly car and CEL coming on.
Before anyone replies that I should have just gotten the 50i, as I mentioned in another thread I didn't do so because of the frequent repairs on my E70 50i. Perhaps that was a mistake as it sounds like the reliability has significantly improved with the N63tu, but regardless, here I am with my 35i that I'm otherwise happy with.
|
In e90 world (same n55 engine) there was a solution to CEL, so I think there should be something to make it work with f15
AFAIK, catless downpipe is indeed a requirement for max power output - it makes turbines spool faster and they can be made to boost higher (with a proper tune that takes into account catless DPs) without fear of burning cats and engine. So there's more than one reason for DPs to be installed. However, in e90s smell was not present due to secondary cats present by default on e90 n55. Do you know if f15 35i has secondary cats?
Update: not sure, but it looks like there are no secondary cats on x5 - so probably there will be smell on idle. Maybe consider catted DPs?