[2Times]

Originally Posted by maperformance

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

Torque drops off so fast, better off shifting early.

[nitehawk]

Thanks for posting. Didn't realize walnut blasting made such a difference regaining power throughout the entire rpm range

[FrankyGTR]

damn im getting that done wow my car feels so fast so i been putting it off i have about 63kmiles

[Jed]

Originally Posted by 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!

I assume your post-walnut cleaning dyno is in a completely stock/no mod car?

Great numbers!

[maperformance]

Yes, this was before any modifications.

[maperformance]

Part II of my dyno testing has been posted here!

[Greginaz]

Thanks for posting real data!

[Pr335bob]

Thanks for this data ! All my questions answered step by step or rather upgrade to upgrade. This is very valuable info. Thank you for putting the time and effort into doing this.

[maperformance]

Originally Posted by Pr335bob

Thanks for this data ! All my questions answered step by step or rather upgrade to upgrade. This is very valuable info. Thank you for putting the time and effort into doing this.

No problem at all!

[Julian2485]

Originally Posted by marsflis

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

What afe stage 2 intake are you referring to ?

[Murph335]

Great data! I daily drive both cars and the sci and dci make more turbo spool sound. To me it's well worth it. Turbo spool is an intoxicating sound. commute is more enjoyable.

Add a v8 rumble and it's best of everything...= venom gt $1m

[SeriousE92]

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

So it's completely safe to run the stock box on a Stage 2 aggressive tune? What filter did you use, stock or aftermarket?

[BQTuning]

Originally Posted by SeriousE92

So it's completely safe to run the stock box on a Stage 2 aggressive tune? What filter did you use, stock or aftermarket?

I cant "vouche" for how safe it is cause it would be something I would not do myself....I think...lol. I can only say based on another person's success, looking at his logs, he had no issues and his wgdc stayed more closed as apposed to a DCI setup, and the car performed phenominally well.

[Glowin]

Originally Posted by SeriousE92

So it's completely safe to run the stock box on a Stage 2 aggressive tune? What filter did you use, stock or aftermarket?

If Cobb's own recommendations are anything to go by, they say in their map notes for Stage 2 maps: "Recommended Upgraded intake system (DCI, panel filter or otherwise)"

Whereas for the 2+ maps, it's Required.
.
.
@maperformance - why didn't you address BuraQ's great post addressed to your testing methods? (#18)

[boost junkie]

Just getting rid of that giant airbox makes the DCI intake worth it. Awesome data btw. Time to get my valves cleaned!

[biz77]

I find the opposite of Bura regarding DCIs.
The below graph shows the difference between stock air box with stock paper filter, the stock air box with no filter element and the Injen dual cone intake. This was done on my 2010 535iXdrive equipped with stock downpipes and stock intercooler. Fuel is E50. This was done using Virtual Dyno, meaning out in the real World on the road where I have real airflow. All runs were done back-to-back-to-back within an hour of each other on the same exact piece of road in the exact same ambient conditions.


I saw even better results on my E90 335i with a BMS DCI.