[maperformance]

I recently picked up an E92 335i that will be used primarily as my daily driver but will see some weekend road course action. I've got access to a dyno so I figured I would do my best to document the performance gains realized with each individual modification. The data below represents the first three steps in my journey, enjoy!

Before and After Walnut Blasting: +17whp and +13wtq from a $399 maintenance service, yes please!



Post Walnut Blasting (Baseline) vs Cobb Stage 1 Sport: I was pretty impressed with the Stage 1 Sport, but who can argue with +65whp and +82wtq from just a flash?



Baseline vs Cobb Stage 1 Aggressive: Due to some knock the Stage 1 Aggressive map actually performed worse than the Stage 1 Sport. Given the fact that I was running 93 octane throughout this testing I can only assume this disparity is due to differences in either fuel or altitude in comparison to their test vehicle.



Baseline vs Custom Pro Tune: Apparently there was some power left on the table from the Stage 1 Sport OTS map which only makes sense in that every vehicle's "situation" (fuel, altitude, etc.) is different. I couldn't be happier given that we realized +73whp and +104wtq from tuning alone!



Cobb Stage 1 Sport vs Custom Pro Tune



Cobb Panel Filter vs BMS Dual Cone Intake: I had seen the BMS DCI recommended quite frequently as the intake solution of choice, so I had to try it out for myself. As you can see the vast majority of the power band is within what I would consider margin of error from run to run, thus BMW did a pretty good job with the intake from the factory! However, above ~6300rpm the BMS DCI does start to show some gains with a maximum of +11whp and +8wtq. Are these gains worth the $95, only you can make that decision!

[Myrder]

Very interesting. What boost are you hitting on these runs. I've heard stock intake is fine but once you are above 15psi DCI is the way to go....?

Also huge props for providing more dyno data and such.

[maperformance]

I believe it was between 14-15psi if I recall correctly.

[BigHoncho]

So no DP or FMIC, thats why you're using stage 1?

[georgelb]

Nice. Thanks for the data, Chris. The majority of dyno charts that get posted are missing a relevant baseline. How many miles on the car? Any pics of what the carbon build up looked like to make such an impact once cleaned out?

[Sean335i]

Most impressive thing is $399 walnut blasting!

nice write up too, great info!

[2000max]

Originally Posted by maperformance

I believe it was between 14-15psi if I recall correctly.

Chris, any plans on producing parts for this platform?

[1nityrider]

Halleujah!! When I get my COBB, I now know where I will take it for custom tuning. I didn't know you guys are on this platform now. I called a while back and someone told me no. Do you guys do that walnut blasting too?

[maperformance]

Originally Posted by BigHoncho

So no DP or FMIC, thats why you're using stage 1?

Correct.

Originally Posted by georgelb

Nice. Thanks for the data, Chris. The majority of dyno charts that get posted are missing a relevant baseline. How many miles on the car? Any pics of what the carbon build up looked like to make such an impact once cleaned out?

Approximately 68k miles:

Originally Posted by 2000max

Chris, any plans on producing parts for this platform?

Most certainly, keep an eye on the vendor section

Originally Posted by 1nityrider

Halleujah!! When I get my COBB, I now know where I will take it for custom tuning. I didn't know you guys are on this platform now. I called a while back and someone told me no. Do you guys do that walnut blasting too?

This is indeed a recent development for us, so far I'm loving my BMW

[1nityrider]

Originally Posted by maperformance

This is indeed a recent development for us, so far I'm loving my BMW

This is great news man!! My worries as to how best to tune my car have now being answered.

[spxxx]

N54 or N55?

[maperformance]

N54

[Chromey]

Thanks for the post, great to see..

[CT335xi]

Chris who pro tuned the car and get some dp's and a fmic on there already

[maperformance]

Originally Posted by CT335xi

Chris who pro tuned the car and get some dp's and a fmic on there already

They need to add BMW to this listing And yes dp's and FMIC are in the works!

[marsflis]

Originally Posted by Sean335i

Most impressive thing is $399 walnut blasting!

nice write up too, great info!

hahaha I was thinking the same thing

[marsflis]

So looking at this there is no point on changing to a DCI for someone who does a lot of daily driving, with the downside that they make the turbos work harder and dont create power until 6k+. I wil def. be sticking to my drop in for now, thanks for the write up OP

[BQTuning]

Originally Posted by maperformance

Cobb Panel Filter vs BMS Dual Cone Intake: I had seen the BMS DCI recommended quite frequently as the intake solution of choice, so I had to try it out for myself. As you can see the vast majority of the power band is within what I would consider margin of error from run to run, thus BMW did a pretty good job with the intake from the factory! However, above ~6300rpm the BMS DCI does start to show some gains with a maximum of +11whp and +8wtq. Are these gains worth the $95, only you can make that decision!

I am going to be straight up, I am not a DCI fan when it comes to our stock turbos

I do not think this comparison is a "legitimate" comparison due to the many factors that have rendered those results between stock box and DCI

If you were making a comparison between CAI vs CAI or DCI vs DCI then the camparison would be just on a dyno

However, the stock box was at a terrible "disadvantage" against the DCI for the following reason:

The stock box was designed to benefit from the car's "preasure" zone at higher loads ie higher speeds. The front grill is a high preasure zone area, thats why the intake ducts are there. The faster the car moves the better for the intake better for the turbos

On a dyno the stock box is basically a cripple and to make it worse even more restrictive when there is little to no preasure to help with air flow . The DCI is less restrictive but causes the turbos to over work and cause the waste gates to open more.

Look at your logs and your will see increased wastegates and the increase of MAF just to make the same boost as it would with the stock box

Your test is what it is on a dyno but unfair to the stock box due to what it was designed for and to benefit from. So, have the car run on a 1/4 and you will see the realistic differences. I garranty the stock box will trap high speed than the DCI on the same car same tune

I have a local here @RnmEvo9 who tested the BMS DCI and the stock box on Cobb Stage 2+ Agreesive. He trapped lower speeds with the DCI . I had similar results to his and it was in the winter

If anyone thinks shifting pass 6k RPMs with a DCI is going to win against a car shifting just before 6k RPMs on a stock box your going to be very disappointed.

Note: BMW does not use DCI in any of their professional race cars and there is a specific reason for this

[2Times]

Originally Posted by BuraQ

...

If anyone thinks shifting pass 6k RPMs with a DCI is going to win against a car shifting just before 6k RPMs on a stock box your going to be very disappointed.
...

I was going to say that I usually shift at 6200 at most in 1st gear anyway, 6100 in 2nd and 6k 3rd+

I guess it's a different story if you're 6MT with RBs or something along those lines where the extra RPMs matter.

[maperformance]

Why shift so early? It looks to me like the power carries to 6500 pretty well?

[marsflis]

Originally Posted by BuraQ

I am going to be straight up, I am not a DCI fan when it comes to our stock turbos

I do not think this comparison is a "legitimate" comparison due to the many factors that have rendered those results between stock box and DCI

If you were making a comparison between CAI vs CAI or DCI vs DCI then the camparison would be just on a dyno

However, the stock box was at a terrible "disadvantage" against the DCI for the following reason:

The stock box was designed to benefit from the car's "preasure" zone at higher loads ie higher speeds. The front grill is a high preasure zone area, thats why the intake ducts are there. The faster the car moves the better for the intake better for the turbos

On a dyno the stock box is basically a cripple and to make it worse even more restrictive when there is little to no preasure to help with air flow . The DCI is less restrictive but causes the turbos to over work and cause the waste gates to open more.

Look at your logs and your will see increased wastegates and the increase of MAF just to make the same boost as it would with the stock box

Your test is what it is on a dyno but unfair to the stock box due to what it was designed for and to benefit from. So, have the car run on a 1/4 and you will see the realistic differences. I garranty the stock box will trap high speed than the DCI on the same car same tune

I have a local here @RnmEvo9 who tested the BMS DCI and the stock box on Cobb Stage 2+ Agreesive. He trapped lower speeds with the DCI . I had similar results to his and it was in the winter

If anyone thinks shifting pass 6k RPMs with a DCI is going to win against a car shifting just before 6k RPMs on a stock box your going to be very disappointed.

Note: BMW does not use DCI in any of their professional race cars and there is a specific reason for this

Well put BuraQ, yet again making easy to understand comparisons between the stock box and DCI... Absolutely saving for the AFE stage 2 intake

[CaptChaos]

Great data, thanks for posting.