[Krash92]

Hey guys, I'm new to the world of BMW's. I purchased the 2013 335 M Sport and now I'm waiting on my Challenge Downpipe, & Berger Stage 2 kit to be installed. Does anybody know how much more horsepower I'll get out of those mods?

[Pauleebe]

You ordered and are having the kit installed but don't know how much power you'll receive?

[ejholt]

Originally Posted by dfoley092

Hey guys, I'm new to the world of BMW's. I purchased the 2013 335 M Sport and now I'm waiting on my Challenge Downpipe, & Berger Stage 2 kit to be installed. Does anybody know how much more horsepower I'll get out of those mods?

I spoke with the folks who sell the DP today, matter of fact I ordered one for my 2014 M-Sport. They told me 20 hp / 30 ft lbs.

On the Stage 2. I'm also ordering one and waiting for clarification on performance. But I've heard upwards of 120 hp. That is what their site states.

There is also a Cold Air Intake as well - aFe. They claim 11 hp / 15 ft lbs.

I've got my GT Haus Quad Exhaust coming tomorrow. I've asked them for performance #s and still waiting. I assume it's in the 20 hp range.

I'm guessing close to a 150 hp gain for $5K and still manage 30+ mpg. All in theory though. Would need to dyno to keep everyone honest.

[F32]

Anywhere between 4 and 57.

[Krash92]

I looked at Injen cold air hbut they don't make one for the 13 F30 automatic only the manual. I'll have to look at the AFE. Have you looked at the evolution exhuast?

[Enilder]

Originally Posted by dfoley092

I looked at Injen cold air hbut they don't make one for the 13 F30 automatic only the manual. I'll have to look at the AFE. Have you looked at the evolution exhuast?

Uh what?

[jtuds]

Isn't the power add something you look into before you decide to have it installed on your car?

Did you test drive your BMW before buying it...or are you just a fly by the seat of your pants kinda guy?

[ejholt]

Originally Posted by dfoley092

I looked at Injen cold air hbut they don't make one for the 13 F30 automatic only the manual. I'll have to look at the AFE. Have you looked at the evolution exhuast?

I did, but based on the leading 5 I saw. GT Haus had the best and I think it is probably the most expensive.

[Krash92]

Thanks ejholt. I like the way they sound. I'll have to compare the two.

Jtuds, I'm not that kind of guy, I know the average hp for each part. I wanted to see if anybody has the same set up and if they've dyno'd it.

I thought this was a forum for advise not for smartass.

[Pauleebe]

Originally Posted by jtuds

Isn't the power add something you look into before you decide to have it installed on your car?

Did you test drive your BMW before buying it...or are you just a fly by the seat of your pants kinda guy?

That was my point as well.

[drob23]

Originally Posted by dfoley092

Thanks ejholt. I like the way they sound. I'll have to compare the two.

Jtuds, I'm not that kind of guy, I know the average hp for each part. I wanted to see if anybody has the same set up and if they've dyno'd it.

I thought this was a forum for advise not for smartass.

I'm not familiar with tunes from personal experience, but everything I've read leads me to believe it's not necessarily an additive thing when you install these components. There is a lot of co-dependency to achieve the max performance.

For FI engines, it seems the most passive improvement comes from combining the intake and headers to reduce restrictions. The exhaust might also be a big factor considering your N55 has a turbo. Once you have these in place, the tune should become much more effective with properly matched high octane fuel.

My point is if you simply chip your car, then I doubt the tune will really have as much ROI since the restrictions are so heavy on both sides of the engine, so maybe the only advantage is the timing change with higher octane fuel.

I'm interested to see how the power delta is for the N54 vs N55 on a similar tune. I'd guess (this is completely speculation) that the N55 has better response stock, but the N54 has better high end tuning potential since the twin scroll might be more restrictive.

[BavarianFanatic]

Originally Posted by dfoley092

I thought this was a forum for advise not for smartass.

You must be new around here...

[BavarianFanatic]

Originally Posted by drob23

I'm not familiar with tunes from personal experience, but everything I've read leads me to believe it's not necessarily an additive thing when you install these components. There is a lot of co-dependency to achieve the max performance.

For FI engines, it seems the most passive improvement comes from combining the intake and headers to reduce restrictions. The exhaust might also be a big factor considering your N55 has a turbo. Once you have these in place, the tune should become much more effective with properly matched high octane fuel.

My point is if you simply chip your car, then I doubt the tune will really have as much ROI since the restrictions are so heavy on both sides of the engine, so maybe the only advantage is the timing change with higher octane fuel.

I'm interested to see how the power delta is for the N54 vs N55 on a similar tune. I'd guess (this is completely speculation) that the N55 has better response stock, but the N54 has better high end tuning potential since the twin scroll might be more restrictive.

Correct assumptions. They are NOT additive and one mod can definitely influence another. For example, for an NA motor, a nice set of headers and a low restriction exhaust will allow it to breathe and uncork a few HP. But the same mod on a supercharged motor will actually hurt performance unless you swap pulleys. Mods to turbo motors can be equally as perplexing at times. It's important to have an overall plan and to stick to the plan. Randomly tossing parts on any motor can yield unexpected outcomes. I'm not saying that the OP is doing this. Just a simple PSA.