DIY and Parts: Mr5 Intake System (Cold Air Intake) for the 135i

[spxxx]

There is absolutely no way that switching from DCI to Mr. 5 changes WOT smoothness. I've run a Mr. 5 intake several times and produced many logs with the only difference being WGDC increasing by ~5% with the Mr. 5 vs DCI and my IAT being slightly lower after idling in traffic with the Mr. 5.

I do like the stealth look, I was considering running the Mr. 5 after I install my inlets, will have to do some logging and check wgdc.

[cbl117]

Originally Posted by spxxx

There is absolutely no way that switching from DCI to Mr. 5 changes WOT smoothness. I've run a Mr. 5 intake several times and produced many logs with the only difference being WGDC increasing by ~5% with the Mr. 5 vs DCI and my IAT being slightly lower after idling in traffic with the Mr. 5.

I do like the stealth look, I was considering running the Mr. 5 after I install my inlets, will have to do some logging and check wgdc.

Can you educate me on what waste gate duty cycle does for you. And what's preferred? I.e higher or lower duty cycle.

Thanks .

[spxxx]

Originally Posted by cbl117

Can you educate me on what waste gate duty cycle does for you. And what's preferred? I.e higher or lower duty cycle.

Thanks .

wgdc is how much "effort" the turbos require to put out in order to reach a certain boost level. Lower is better and is indicative of healthy or new turbos that don't need to work hard and a low amount of restrictons (small inlets, clogged air filters, etc) are all restrictions on the turbos and will increase wgdc

[highbrowed]

Originally Posted by e36addict

Uhm.. what? That looks ridiculous.. and pointless. Just get a BMS DCI lol

This. But to each his own.

[cbl117]

Originally Posted by spxxx

wgdc is how much "effort" the turbos require to put out in order to reach a certain boost level. Lower is better and is indicative of healthy or new turbos that don't need to work hard and a low amount of restrictons (small inlets, clogged air filters, etc) are all restrictions on the turbos and will increase wgdc

Thanks. Makes sense.

[dbchun]

Originally Posted by thetaobear

- Hard Logs and Numbers (coming up!)

==========
Hard Logs and Numbers

Coming up!

ever get a chance to run some logs? thanks for sharing this mod

[muddtt]

I bought some of the parts to do this on my convertible, but there is a bar behind the headlight that prevents any tube from going down. I 3D printed some parts that were going to be for my flange. You can go and buy the aluminium part if you think that's more stable. Anyways $115 + shipping if you're interested.

[Obiwan31]

Originally Posted by thetaobear

Not sure if this has been done for the N55 engine. This is for the N54

N55 airbox design is not similar to the N54 one. Here is what I've done on my N55 135.

Chhers,

Obi

[muddtt]

Here's the E88 Convertible version I finished.

The vert has a tube near the headlight to stiffen the car which prevents a 2.25" tube from going down. Ended up using two 1.25" tubes instead which just fits. Of course, it's not as much volume as the larger tube, but still better than nothing.



Used some 3D printed parts to accommodate the two tubes. I used some gasket material and hardware to mount the parts to the airbox so I could remove it and make changes if necessary.





For the filter side I 3D printed a part to accommodate the same filter used in this build.



If you want the 3D models to make your own let me know.

[Downeaster1]

Originally Posted by Obiwan31

N55 airbox design is not similar to the N54 one. Here is what I've done on my N55 135.

Chhers,

Obi

Originally Posted by muddtt

Here's the E88 Convertible version I finished.

The vert has a tube near the headlight to stiffen the car which prevents a 2.25" tube from going down. Ended up using two 1.25" tubes instead which just fits. Of course, it's not as much volume as the larger tube, but still better than nothing.



Used some 3D printed parts to accommodate the two tubes. I used some gasket material and hardware to mount the parts to the airbox so I could remove it and make changes if necessary.





For the filter side I 3D printed a part to accommodate the same filter used in this build.



If you want the 3D models to make your own let me know.

Hats off to both of you as that looks like a fairly clean design and install. The proper materials (in my opinion) were used, and it looks very clean and not hacked at all. Good stuff!

[thetaobear]

Wow, you guys are going serious with this. Looks super clean!!!

Overtime, the hose gets a little cut up. I am really wondering what is the best hose to get these days that is more robust.

Originally Posted by muddtt

Here's the E88 Convertible version I finished.

The vert has a tube near the headlight to stiffen the car which prevents a 2.25" tube from going down. Ended up using two 1.25" tubes instead which just fits. Of course, it's not as much volume as the larger tube, but still better than nothing.



Used some 3D printed parts to accommodate the two tubes. I used some gasket material and hardware to mount the parts to the airbox so I could remove it and make changes if necessary.





For the filter side I 3D printed a part to accommodate the same filter used in this build.



If you want the 3D models to make your own let me know.