[Pinscher]

Hi Fellas,

Some of you may know, i'm new to BWM and own a 328xi from 2007. it has like 62k KMs on it so it's a pretty happy car.

The point of this post is to get a feeling for power returns after i mod the car.

So, I have a 3 stage intake i will install and i will be doing the Performance Exhaust mod to my stock muffler, and also an AA tune. Since I will not be doing a Dyno, ever, the real numbers are irrelevant to me, but what I was wondering is if the 3 stage with Exhaust/tune mods will improve power more so than just the 3 stage with tune.

Thank you in advance.

[Biginboca]

You really can’t feel any difference on mods that are under 10hp. 15-20hp is where you really start to be able to notice a change.

So you should be able to do some research and figure out which mods you are considering will make a felt change and which are only visible in gps timers and dynos.

Exhaust mods you really want headers (~20hp) to make a worthwhile difference. A secondary cat delete is also worth maybe 8hp. Any other exhaust mods are not worth much maybe 3-5hp.

[Taskmaster]

Originally Posted by Biginboca

You really can’t feel any difference on mods that are under 10hp. 15-20hp is where you really start to be able to notice a change.

So you should be able to do some research and figure out which mods you are considering will make a felt change and which are only visible in gps timers and dynos.

Exhaust mods you really want headers (~20hp) to make a worthwhile difference. A secondary cat delete is worth maybe 8hp.

This.

Skip the exhaust and do the 3 stage the, MVS/MILVS and a good tune. The torque is what you'll feel the most on the automatic.

[rjahl]

Originally Posted by Taskmaster

This.

Skip the exhaust and do the 3 stage the, MVS/MILVS and a good tune. The toque is what you'll feel the most on the automatic.

He's correct.

3 stage, Milvs, and tune. Best bang for the buck. If you can deal with headers, they are good Gains as well. Everything else is "white noise".


I'm not 100% sure about the AWD but I would try running the EU version of the 330 tranny tune. It should manage the extra power a little better and shift points will be better suited for your new power band.

[Pinscher]

Originally Posted by rjahl

He's correct.

3 stage, Milvs, and tune. Best bang for the buck. If you can deal with headers, they are good Gains as well. Everything else is "white noise".


I'm not 100% sure about the AWD but I would try running the EU version of the 330 tranny tune. It should manage the extra power a little better and shift points will be better suited for your new power band.

I'll have to keep an eye out for headers for sure, though it's the most expensive part of all the upgrades it seems.

It's unfortunate that half of what you said is out of my knowledge base. Can you clarify what Milvs is, and does a AA tune include the Tranny tune?

[Eagle1oh7]

Well you have AWD, so that doesn't help your gains.

[Pinscher]

Originally Posted by Eagle1oh7

Well you have AWD, so that doesn't help your gains.

I'm not worried about that. The decision was already made to buy AWD