[michaelalex17]

please close thread. thanks

[FVM3]

No problems with warranty and the engine but leaks little low end torque

[michaelalex17]

thank you for responding, why would it effect low end torque?

[DJtoad]

Originally Posted by christopherchenm

No problems with warranty and the engine but leaks little low end torque

No problem with warranty? While I agree it shouldn't affect the warranty, there's a long thread about what happened to member "prowess symphony".

OP, I had those DCIs on my 535i for a few weeks. I don't have any other mods so I wasn't expecting any kind of performance gain, but was looking forward to hearing the turbos whine a bit. Maybe it was because the 535i has more insulation, but I really couldn't hear much of a sound difference in most situation and there did seem to be a bit less low end torque with them installed. The warranty concerns didn't outweigh the benefits in my opinion so I pulled them off for now. I'll put them back on once the warranty is done and I get a tune.

[E90PAT]

Originally Posted by DJtoad

No problem with warranty? While I agree it shouldn't affect the warranty, there's a long thread about what happened to member "prowess symphony".

OP, I had those DCIs on my 535i for a few weeks. I don't have any other mods so I wasn't expecting any kind of performance gain, but was looking forward to hearing the turbos whine a bit. Maybe it was because the 535i has more insulation, but I really couldn't hear much of a sound difference in most situation and there did seem to be a bit less low end torque with them installed. The warranty concerns didn't outweigh the benefits in my opinion so I pulled them off for now. I'll put them back on once the warranty is done and I get a tune.

if you pair it with a tune, you really hear them.

[FVM3]

Originally Posted by michaelalex17

thank you for responding, why would it effect low end torque?

hmm...hard to explain...need some experts here to explain but same as some after market exhaust which gains HP but leaks low end torque

[Forcefed3]

Well you shouldnt be going into the dealer every few days... but you can go back to stock with out anyone knowing. And no, it doesnt cause problems. Also, I have not noticed any power loss in the low RPM's.

[michaelalex17]

Originally Posted by christopherchenm

hmm...hard to explain...need some experts here to explain but same as some after market exhaust which gains HP but leaks low end torque

if someone can please chime in and explain why it causes loss of low end torque it would be helpful. i emailed terry at burger motorsports and he said theres improved power throughout the entire power band and i looked at the dyno which confirmed that. so can someone please use evidence to show that it in fact causes a loss of low end power. thanks

[Forcefed3]

Originally Posted by michaelalex17

if someone can please chime in and explain why it causes loss of low end torque it would be helpful. i emailed terry at burger motorsports and he said theres improved power throughout the entire power band and i looked at the dyno which confirmed that. so can someone please use evidence to show that it in fact causes a loss of low end power. thanks

There is no loss in low end torque. If anyone has a dyno showing otherwise please show it.

[**335i**]

i have 2 dynos with baseline (no dci) stock box and then with dcis dont think that my dynos graphs will help

[Iwantm3]

Don't waste your money

[M3 Eater]

i think that some compression (resistance is expected by the DME and the DCI removes all resistance) is lost when you remove the box. This lets the engine breath much better through the mid range and up top but the velocity of the air on take off is a bit slower because there is so much more room for air to flow. Once it gets going everything is aok! I have heard tons of reports of minor throttle response loss during take off. If you want cones and resistance (great for take off but chokes you out in the midrange and up top) I have been running bms dci for some time now and I love it. I even made a heat sheild for it but realized that my car likes more air....all it can get...it would rather have lots of warm air than just a box full of cold!

I have a variation of DCI available for sale... AEM Brute Force Cones....and the BMS couplers... pm if you would like to save on DCI. My cones are not open ended so anyone stock, jb+ or running 14psi or less will have better throttle response with these closed end cones.(in my opinion) I have been running 16.5 psi with them just fine but switched recently to some open ended cones and noticed a difference. Cones are indestructable! I got them becuase I knew I'd be working in that area on my charge pipe, DVs and manifold but now I am done and have installed more delicate, wire framed, open faced cones from Vibrant. Throttle isn't as touchy but mid range and top end seem to keep giving more and more each pull.

[**335i**]

dci are realy good it was my first mod related with engine also nice sound

[Iwantm3]

I havn't noticed any sound difference, I mean maybe a little but not like I've expected at all , when you install and intake on a japanese v6 it gives you a crazy sound with 335i it's mehhhhhh

[Forcefed3]

Originally Posted by Iwantm3

I havn't noticed any sound difference, I mean maybe a little but not like I've expected at all , when you install and intake on a japanese v6 it gives you a crazy sound with 335i it's mehhhhhh

But you are still getting more airflow. Thats why you purchase it, not for sound.

[RON1X]

I no longer have my DCI, but if you pair it with a tune the sound is very noticeable. People on the sidewalk/ near the street would stare when I applied a lot of throttle and that was before I had exhaust. I only say this because you need a tune with the DCI to really hear the difference (and its a big difference). I got the DCI more for the performance aspect though Its a decent mod, but I read a lot about heatsoak with the DCI, so until I get a cold air intake, I am using a K&N drop in and am happy with it. Although the DCI install is very simple and easy, just make sure the tubes fit tight, you don't want any debris getting in the engine

[badass335]

Its all about heatsoak. On a dyno, they are running fans etc with the hood open (for most cases) so it never really shows. it. It may be little but when you take off low end, you are sucking in hot air from the engine as the cold air isn't being pulled into the engine yet. Mid-range and above the car is moving creating airflow thus cooler air. I believe there were multiple threads on this and one by Former Boosted IS where he compares his Stett CAI to the DCI, you can see a minor but definite increase witht the Stett pipe.

I have a vented hood and then decided to get the Dinan CAI and it does make a difference. Again, not huge but every little bit helps plus it looks great!

[M3 Eater]

tons of threads on heat soak as well.... turbo cars just need lots of air.... cold is better yes, but lots of air is better still... there are tons of posts depicting that hundreds you spend on cai is hardly worth the 5 or 6 whp you get from having cold air.

DCI 8-15 whp with tune $99
Stett CAI 10-22 whp with a tune $449

Yes the stett is better, no doubt but $400 better?? you'll get much more if you buy a basic meth kit and dci for the same money... 45whp on map 5

I think there may be a point at which when you have a solid FMIC and meth that the DCI will render more air for more whp when compaired to the Stett CAI with the exact same mods. This is a topic for discussion for sure.....
I am slowly on my way to having both meth and fmic... once I get there, I think I will be glad that I have DCI instead of CAI. The long tubes associated with CAI always are going to restrict air intake and make the turbos work a bit harder, even if they are sucking air from a cold spot in the bumper.

DCI will not hurt your car, there is some throttle lag but hardly noticable and once you get moving....It has less restriction on the incoming air than any other intake no matter what the price. It is an excellent first, 2nd or 3rd mod and allows room from growth, getting steadily more and more effective the harder you push the car.

My favorite intake...INJEN dci with plenium to send air to one of the cones, short tubes for low restriction, big cones for lots of air, velocity stack for even less restriction of air. It to is $400 and in no way $300 better than BMS or Vishnu DCI. Thats why I don't have one. If I could pick one up used for say $200... I think its $100 better 3-5whp but thats it. Spend any more on an Intake and you may as well get a DINAN or Simota carbon fiber box to show off how much money you have to waste....(very common among bmw owners)

[badass335]

Originally Posted by M3 Eater

Spend any more on an Intake and you may as well get a DINAN or Simota carbon fiber box to show off how much money you have to waste....(very common among bmw owners)

That's me! Dinan baby! but i got a deal from a fellow e90 member. AND i have the FMIC And i have meth..

Me likey go very very fast....

[BrianMN]

Originally Posted by M3 Eater

tons of threads on heat soak as well.... turbo cars just need lots of air.... cold is better yes, but lots of air is better still... there are tons of posts depicting that hundreds you spend on cai is hardly worth the 5 or 6 whp you get from having cold air.

DCI 8-15 whp with tune $99
Stett CAI 10-22 whp with a tune $449

Yes the stett is better, no doubt but $400 better?? you'll get much more if you buy a basic meth kit and dci for the same money... 45whp on map 5

I think there may be a point at which when you have a solid FMIC and meth that the DCI will render more air for more whp when compaired to the Stett CAI with the exact same mods. This is a topic for discussion for sure.....
I am slowly on my way to having both meth and fmic... once I get there, I think I will be glad that I have DCI instead of CAI. The long tubes associated with CAI always are going to restrict air intake and make the turbos work a bit harder, even if they are sucking air from a cold spot in the bumper.

DCI will not hurt your car, there is some throttle lag but hardly noticable and once you get moving....It has less restriction on the incoming air than any other intake no matter what the price. It is an excellent first, 2nd or 3rd mod and allows room from growth, getting steadily more and more effective the harder you push the car.

My favorite intake...INJEN dci with plenium to send air to one of the cones, short tubes for low restriction, big cones for lots of air, velocity stack for even less restriction of air. It to is $400 and in no way $300 better than BMS or Vishnu DCI. Thats why I don't have one. If I could pick one up used for say $200... I think its $100 better 3-5whp but thats it. Spend any more on an Intake and you may as well get a DINAN or Simota carbon fiber box to show off how much money you have to waste....(very common among bmw owners)

Hmmm, I've never heard of the throttle lag or loss of low-end torque before this thread.

Also not sure where the $449 for the Stett CAI came from. I bought it for $375 a couple weeks ago. Does it make the turbos work harder/is the air coming in 'insufficient'??? My testing and WGDC logs, as well as FBIS' testing suggest that the Stett CAI does NOT make the turbos work harder.

[Forcefed3]

Originally Posted by BrianMN

Hmmm, I've never heard of the throttle lag or loss of low-end torque before this thread.

Also not sure where the $449 for the Stett CAI came from. I bought it for $375 a couple weeks ago. Does it make the turbos work harder/is the air coming in 'insufficient'??? My testing and WGDC logs, as well as FBIS' testing suggest that the Stett CAI does NOT make the turbos work harder.

+1
The throttle response is increased. And while some dynos may show as little as 1 whp gain, it does not reduce HP or TQ.

[michaelalex17]

bump