[Mr. 5]

As promissed,
I tested my intake Saturday morning to see if the changes made improvements.
For those who don't want the excutive summary, the Mr. 5 Intake performed the best out of the DCI and the OEM air box.
For those who don't know, this was my original design:
http://www.e90post.com/forums/showth...3538&highlight

This is the updated version which I used during this test:
http://www.e90post.com/forums/showth...9293&highlight

Now before anyone starts to think that these results are scewed then think again. I'm not selling this. It was just an idea that I had (Thanks Dinan) to grab the coldest air for the engine without the restrictions.

Also, I chose a road that goes slightly up hill so we don't have the "Those 60-100 runs are slow compared to what others are getting" posts. I also wanted to see how each intake did under pressure.
All off topic posts will be deleted since we are only talking about the comparisons of intakes.

This is what I did:

3 Runs with my Intake
3 runs with the OEM air box
3 runs with the DCI
2 runs with my intake again to make sure I wasn't seeing things.

I highlighted the best run of each.


Mr. 5 Intake

Time 4.63
Peak Boost 15.95
Average Boost 14.006
Average Wastegate Pulse Duration 45.28%
Peak Wastegate Pulse Duration 49.48%

Time 4.63
Peak Boost 15.95
Average Boost 14.08
Average Wastegate Pulse Duration 45.25%
Peak Wastegate Pulse Duration 49.43%

Time 4.66
Peak Boost 15.95
Average Boost 14.09
Average Wastegate Pulse Duration 44.88%
Peak Wastegate Pulse Duration 50.23%



Stock

Time 4.73
Peak Boost 16.095
Average Boost 14.031
Average Wastegate Pulse Duration 46.09%
Peak Wastegate Pulse Duration 52.88%

Time 4.68
Peak Boost 16.24
Average Boost 14.09
Average Wastegate Pulse Duration 49.09%
Peak Wastegate Pulse Duration 54.84%

Time 4.69
Peak Boost 16.385
Average Boost 14.10
Average Wastegate Pulse Duration 46.00%
Peak Wastegate Pulse Duration 53.91%



DCI

4.67
Peak Boost 16.24
Average Boost 14.33
Average Wastegate Pulse Duration 45.48%
Peak Wastegate Pulse Duration 50.54%

4.72
Peak Boost 16.24
Average Boost 14.34
Average Wastegate Pulse Duration 45.44%
Peak Wastegate Pulse Duration 51.42%

4.70
Sorry, but I forgot to hit the start button to log.



As you can see, the best times obtained were done with the Mr. 5 intake and the average boost, peak boost and wastegate duty cycles were less than with the other intakes.

When I finished the testing with the DCI, I was curious if it the conditions changed at all from when i ran the Mr. 5 intake earlier so I put it back on to see if I could replicate the results and I did.
I didn't do any BT logs but it's obvious that my intake did pretty well.

4.68 and 4.62 were the times when I put my intake back on so actually my best time was 4.62.

[Terry @ BMS]

Nice testing Craig! Do you have photos of the latest incarnation of the Mr 5 intake?

[JPSlick]

I'm actually not surprised here..

Question, does your intake make any more noise over the stock intake? Really like the sound of the DCI (I know that sounds ricey, but my car is too quiet otherwise considering im on stock exhaust).

[Mr. 5]

Originally Posted by Terry @ BMS

Nice testing Craig! Do you have photos of the latest incarnation of the Mr 5 intake?

Thanks Terry. They are in the second link but I'll post some of the pictures here. The filter down below was replaced with one of the DCIs:

[Terry @ BMS]

That design looks much better than your first one! Looking at the wastegate duty cycles clearly shows the compressors are working less with the Mr.5 intake and DCI compared to the stock airbox. I know you went with single 3rd gear pull to avoid shifting variance, but a 60-130 run might show a more realistic spread. With only 4-5 seconds its hard to see the real performance difference between the three. But at 9-10 seconds we'd see more of a spread.

PS. The testing seems to indicate what we saw in our testing. Specifically that there was a slightly potential advantage with the stock filter + 2nd filter compared to the DCI. But our testing was 40-120 and we saw less than .1th gain and only on some runs. After a few tests back and forth we concluded the open element was about as good, easier to install, and less expensive. It is possible your new design out flows our development design though. Maybe I'll hack up another airbox and make a Mr5 replica for testing.

[CBR335]

Hey Craig, do you have plans to replace the flexible accordion pipe with a smooth version sometime? I know the diameter is large already, but I'm sure it would flow even better. You could use thin-walled PVC in a pinch, assuming it will withstand the heat.

[Mr. 5]

Originally Posted by Terry @ BMS

That design looks much better than your first one! Looking at the wastegate duty cycles clearly shows the compressors are working less with the Mr.5 intake and DCI compared to the stock airbox. I know you went with single 3rd gear pull to avoid shifting variance, but a 60-130 run might show a more realistic spread. With only 4-5 seconds its hard to see the real performance difference between the three. But at 9-10 seconds we'd see more of a spread.

I agree that a wider range of acceleration would be better but i really didn't want to mess with any shifting. If I had an auto then it would have been a no brainer.

Originally Posted by CBR335

Hey Craig, do you have plans to replace the flexible accordion pipe with a smooth version sometime? I know the diameter is large already, but I'm sure it would flow even better. You could use thin-walled PVC in a pinch, assuming it will withstand the heat.

No, I'm happy with this.
The inside of this 3" ducting is really smooth and I kind of doubt there would be an increase.

[CBR335]

Well, the numbers look good and it will be interesting to test test the longer runs that Terry suggested. More solid data is always a good thing.

Craig, I like that you back up your claims with data unlike many others.....that post on other forums of course.

[temperamental]

the best of both worlds....an open and close...case

[cstavaru]

The fact that the average boost with the Mr. 5 intake AND stock intake is 14PSI and the average boost with the DCI is 14.3PSI is interesting. My conclusion is that the DCI sucks less-dense air thus more air is needed to supply the needed amount of oxygen to the engine, needing more boost. Colder air is better

[Former_Boosted_IS]

Originally Posted by cstavaru

The fact that the average boost with the Mr. 5 intake AND stock intake is 14PSI and the average boost with the DCI is 14.3PSI is interesting. My conclusion is that the DCI sucks less-dense air thus more air is needed to supply the needed amount of oxygen to the engine, needing more boost. Colder air is better

I think that you are reading far too much into that. That is well within the variance of the runs and tune. Wastegate Duty Cycle is the important info there.

[BMW_TT]

Job well done

[Mr. 5]

Here is a difference between the initial filter that I was using and the one that I'm using now.

The filter that I'm using now is the Macht Schnell DCI filter and has a 3" opening. I purchased an aluminum 3" pipe that connects to the 3" ducting.
As you can see, there is very little restriction.

[Terry @ BMS]

Originally Posted by cstavaru

The fact that the average boost with the Mr. 5 intake AND stock intake is 14PSI and the average boost with the DCI is 14.3PSI is interesting. My conclusion is that the DCI sucks less-dense air thus more air is needed to supply the needed amount of oxygen to the engine, needing more boost. Colder air is better

It could be. Also could be normal testing variance. Everyone will agree colder air in higher volume is better. It's always a volume problem. Lots of hot air or less ducted cold air. Look at how many people stay with the stock airbox because they feel they are getting colder air only to be working their compressors much harder to suck it in?

[T-Mack]

Originally Posted by Terry @ BMS

It could be. Also could be normal testing variance. Everyone will agree colder air in higher volume is better. It's always a volume problem. Lots of hot air or less ducted cold air. Look at how many people stay with the stock airbox because they feel they are getting colder air only to be working their compressors much harder to suck it in?

I cant write sufficiently well for talk with yours but i can understand you!!! In my 1.8T K04 has done a lot of testing with different intakes and i could see all this: "It is better lots of hot air that less ducted cold air". I had a CDA intake and the boost give more psi without the box that with CDA complete.

I hope that you understand me....

[R1000K3]

Originally Posted by Mr. 5

No, I'm happy with this.
The inside of this 3" ducting is really smooth and I kind of doubt there would be an increase.

I agree, the cross section area should be sufficient now. It may even be near optimal in this solution, a perfectly smooth surface does not necessarily transports flow better than if there is some surface turbulence (e.g. golf balls).

[Mr. 5]

Originally Posted by R1000K3

I agree, the cross section area should be sufficient now. It may even be near optimal in this solution, a perfectly smooth surface does not necessarily transports flow better than if there is some surface turbulence (e.g. golf balls).

Yep, it works realy well.
The other day I went to a Mustang Dyno for testing and ran 390 whp and 420 wtq on a mustang dyno with 91/meth.

[Former_Boosted_IS]

Originally Posted by Mr. 5

Yep, it works realy well.
The other day I went to a Mustang Dyno for testing and ran 390 whp and 420 wtq on a mustang dyno with 91/meth.

Kuddos to Mr.5!! Got the car on a load bearing Mustang Dyno!

[BMW335E93]

Hey 5,

Do you have any new developments going on?

[335iMspizzle]

you take the top cover off the airbox ?

[aoschadlin]

Originally Posted by 335iMspizzle

you take the top cover off the airbox ?

The top cover only comes off for photos.

[marvel48]

Originally Posted by aoschadlin

The top cover only comes off for photos.

Why cant it stay off all the time? Does the filter need to be held down by something?

Thats what i thought the setup was and thought it optimal; stock snorkel and ducted intake providing cool air plus the open filter allowing less restricted warm air.

[aoschadlin]

Originally Posted by marvel48

Why cant it stay off all the time? Does the filter need to be held down by something?

Thats what i thought the setup was and thought it optimal; stock snorkel and ducted intake providing cool air plus the open filter allowing less restricted warm air.

The lid completes the channel for outside air to come up through the filter and across to the reservoir for the turbo intakes. Leaving the lid off means the air comes directly into the reservoir without going through the filter at all.