Thoughts On Supercharging my E90 M3

[----Flyin-High----]

Originally Posted by 415cpa

I use these O2 sensor spacers that have a mini-cat built into them. Was able to get all readiness monitors set including the O2 sensor.

https://www.ebay.com/itm/O2-Oxygen-C...item3af9d816a9

did you just plug those in and put the o2 sensor into them?

[pbonsalb]

With test pipes that leave the rear cats in place, the inexpensive eBay minicats might work. If fully catless, probably not. Give them a try and report back with your results.

[SAMM3Y]

Originally Posted by pbonsalb

No, the faster you spin the blower, the more drag on the crank. I would personally still supercharge my E90M3 that has 100k miles, but I would be doing so knowing and accepting the increased risk. And if I supercharged, I would not buy the lowest power kit. I would go for the power I want.

I have been thinking about changing the main bearings as preventative maintenance. It would be fun. I did the rod bearings myself about 5 years ago. I don’t know that changing the mains in necessary — few cars have had main bearing failures, but it would give me some peace of mind. I have also thought about just buying a used F10M5 instead since it would already have the power I want and could be easily modded for more.

Oh I see what your saying, Right on I'll check that thread, thanks.

[----Flyin-High----]

if anyone is wondering the minicats worked. Driven for 250 miles no CEL light

[pbonsalb]

Are you catless or just test pipes with rear cats in place?