[Borsig]

just going by the review

[Former_Boosted_IS]

Remember I had to relocate things for my HID kit among other things. Realistically it is a 45 minute job if you are uninstalling it for service visits. Why would you ever remove an intake for service? They cannot hijack us like that on an intake.

[ADVANT123]

Any data points from the stock intake to compare?

[Former_Boosted_IS]

Originally Posted by ADVANT123

Any data points from the stock intake to compare?

I do not, but in my opinion that is futile. The reason I say this is that we know the wastegate duty cycles are through the roof to keep up boost at high rpms on stock airboxes. Since that is the case, we know the turbos are spinning faster to produce the same boost. Why? Because the stock airbox is a restriction at higher boost levels and the turbos must spin faster to get the air necessary to supply the required boost. That alone makes the comparison futile in my opinion.

[ADVANT123]

Originally Posted by Former_Boosted_IS

I do not, but in my opinion that is futile. The reason I say this is that we know the wastegate duty cycles are through the roof to keep up boost at high rpms on stock airboxes. Since that is the case, we know the turbos are spinning faster to produce the same boost. Why? Because the stock airbox is a restriction at higher boost levels and the turbos must spin faster to get the air necessary to supply the required boost. That alone makes the comparison futile in my opinion.

I'm more interested in seeing how the stock airbox compares in "driving around town" and sitting at idle for prolonged periods. Is the stock airbox a restriction, or is the stock air filter a restriction. Does anyone make a better performing drop-in filter?

[Former_Boosted_IS]

Originally Posted by ADVANT123

I'm more interested in seeing how the stock airbox compares in "driving around town" and sitting at idle for prolonged periods. Is the stock airbox a restriction, or is the stock air filter a restriction. Does anyone make a better performing drop-in filter?

The testing I have seen shows the drop-in filters performed identical to the paper filter.

[Ironring Racing]

FBI (lol!), do you think it would be possible/easy to shroud in the cone intake filter to the front grill opening (maybe with a water trap/drain on the bottom), to regain some of the RAM air effect lost from the stock box?

This increase in intake pressure would directly reduce the compression ratio and thus reduce the turbo dc. If this could be done, I believe that would address the final remaining issue with the intake and possibly make the STETT intake quite simply the best one out there.

As I posted in Mr. 5's thread, I was talking to Steve Dinan personally and asked him about his intake, which starts out similiar to the STETT but ties into the stock airbox. To address the issue of water he put a water trap, similiar to a snorkel water diverter, on the intake to divert large volumes of water away.

Great work, I'd been holding off on an intake for the same reasons you just proved out, higher temps. Looks like the STETT is a good product.

[Terrance28]

Originally Posted by ADVANT123

I'm more interested in seeing how the stock airbox compares in "driving around town" and sitting at idle for prolonged periods. Is the stock airbox a restriction, or is the stock air filter a restriction. Does anyone make a better performing drop-in filter?

If you are worried mostly about driving around town then just stick with the stock airbox.

[stressdoc]

Nice review and data analysis!

This doesn't look like it will fit in combination with the accessory cooling radiator of the BMW Perf engine kit, but I don't imagine that too many folks would be interested in both...

[Former_Boosted_IS]

Originally Posted by Ironring Racing

FBI (lol!), do you think it would be possible/easy to shroud in the cone intake filter to the front grill opening (maybe with a water trap/drain on the bottom), to regain some of the RAM air effect lost from the stock box?

This increase in intake pressure would directly reduce the compression ratio and thus reduce the turbo dc. If this could be done, I believe that would address the final remaining issue with the intake and possibly make the STETT intake quite simply the best one out there.

As I posted in Mr. 5's thread, I was talking to Steve Dinan personally and asked him about his intake, which starts out similiar to the STETT but ties into the stock airbox. To address the issue of water he put a water trap, similiar to a snorkel water diverter, on the intake to divert large volumes of water away.

Great work, I'd been holding off on an intake for the same reasons you just proved out, higher temps. Looks like the STETT is a good product.

Honestly, I feel it is really shrouded in a sense. You are opening up the duct next to the fog to feed cold air into the location. The intake is enclosed by plastic seals to the fender well, bumper, and engine compartment. The only gap is where the pipe goes into the fender well. You could probably easily fab something to seal up this area? I am sure a bypass valve could be used to ensure water could never get in there. How many would be interested in this? I can pose the idea to STETT.

[Former_Boosted_IS]

Originally Posted by stressdoc

Nice review and data analysis!

This doesn't look like it will fit in combination with the accessory cooling radiator of the BMW Perf engine kit, but I don't imagine that too many folks would be interested in both...

stressdoc, thanks for the compliments. I have yet to ever have high water temps yet and I have done some logging. I wonder if it is needed if you take care of the high IATs that result from the stock IC.

[Ironring Racing]

Originally Posted by Former_Boosted_IS

Honestly, I feel it is really shrouded in a sense. You are opening up the duct next to the fog to feed cold air into the location. The intake is enclosed by plastic seals to the fender well, bumper, and engine compartment. The only gap is where the pipe goes into the fender well. You could probably easily fab something to seal up this area? I am sure a bypass valve could be used to ensure water could never get in there. How many would be interested in this? I can pose the idea to STETT.

Yes, I would. Please ask STETT if they'll look at doing that.

At that point I think it would address all of the above issues. With your IAT testing, and RAM to reduce the turbo dc at speed, it would be the best intake I've seen out there, with possibly the exception of the Gruppe (but I don't know what the filter area is on the Gruppe).

[Former_Boosted_IS]

Originally Posted by Ironring Racing

Yes, I would. Please ask STETT if they'll look at doing that.

At that point I think it would address all of the above issues. With your IAT testing, and RAM to reduce the turbo dc at speed, it would be the best intake I've seen out there, with possibly the exception of the Gruppe (but I don't know what the filter area is on the Gruppe).

I posed the question and will let you know if I hear anything else.

[jippii ensio]

Originally Posted by Former_Boosted_IS

I posed the question and will let you know if I hear anything else.

Great, CAI with RAM would get my attention.

[Former_Boosted_IS]

Originally Posted by jippii ensio

Great, CAI with RAM would get my attention.

Please do not take this wrong, but I seriously doubt we will ever get RAM. I personally don't think it would make an ounce of difference on these cars, but that is just my opinion. You certainly could custom fab one in fender well if you wanted though.

[Type-R Yo!]

Does the Stett CAI fit in a 2009 335i Sedan with the M-Sport front bumper? Because I have the M-Sport package on my car. Thanks

[Former_Boosted_IS]

Originally Posted by Type-R Yo!

Does the Stett CAI fit in a 2009 335i Sedan with the M-Sport front bumper? Because I have the M-Sport package on my car. Thanks

There are a lot of them out there, so maybe someone with this setup can chime in?

[longodj]

Just finished install. In a word: phenomenal.

[XPO186]

Originally Posted by longodj

Just finished install. In a word: phenomenal.

further impressions?

[Borsig]

Originally Posted by Type-R Yo!

Does the Stett CAI fit in a 2009 335i Sedan with the M-Sport front bumper? Because I have the M-Sport package on my car. Thanks

There is no peice to remove beside the fog light...

I will be working on a place for it to draw more air from this week when I install my fmic.

I may modify the brake duct or something.

[bigpuna]

This is a much better design then the DCI. Outside of running the well designed stock intake this would be the only intake I would consider. Nice work with the testing and data

[Former_Boosted_IS]

Originally Posted by bigpuna

This is a much better design then the DCI. Outside of running the well designed stock intake this would be the only intake I would consider. Nice work with the testing and data

Bigpuna, thanks for the appreciation. I never intended to do this, but it seems to be work that helped the community.