[Xanderdbs]

I wanted to see if anyone has Modded the stock B58 Intake ?

i just want a little more flow and better sound without actually visually changing the stock looking box.

id appreciate any insite

-Xander

[chenry]

I remember back in my VW/Audi days (mid to late 80's) we would cut holes in the factory airboxes (there were certain areas where that was recommended for sound and power) etc....it seems you are asking about a similar mod (sorry if I interpreted your post incorrectly) and not about open element air filters, replacement boxes, or drop in filters.....all of which are available. If that's the case - I've been on the forums for a while and have not seen a mod for the stock box.

Just my 2-cents - best of luck with your quest

Edit: I think I remember someone modifying the intake silencer (or whatever it's called) but that would only net you increased sound

[grassy_91]

Originally Posted by chenry

I remember back in my VW/Audi days (late to mid 80's) we would cut holes in the factory airboxes etc....it seems you are asking about a similar mod (sorry if I interpreted your post incorrectly) and not about open element air filters, replacement boxes, or drop in filters.....all of which are available. If that's the case - I've been on the forums for a while and have not seen a mod for the stock box.

Just my 2-cents - best of luck with your quest

Edit: I think I remember someone modifying the intake silencer (or whatever it's called) but that would only net you increased sound

Reminds me of what people were doing to the stock airboxes on the 2nd gen Lexus is250/350 to get more sound without spending $300 on an intake. OP: for this car if you want to do something simple and not break the bank, I’d recommend the bms (Burger Motorsport) intake to gain a little bit of extra sound.

[Xanderdbs]

Originally Posted by grassy_91

Reminds me of what people were doing to the stock airboxes on the 2nd gen Lexus is250/350 to get more sound without spending $300 on an intake. OP: for this car if you want to do something simple and not break the bank, I’d recommend the bms (Burger Motorsport) intake to gain a little bit of extra sound.

Originally Posted by chenry

I remember back in my VW/Audi days (mid to late 80's) we would cut holes in the factory airboxes (there were certain areas where that was recommended for sound and power) etc....it seems you are asking about a similar mod (sorry if I interpreted your post incorrectly) and not about open element air filters, replacement boxes, or drop in filters.....all of which are available. If that's the case - I've been on the forums for a while and have not seen a mod for the stock box.

Just my 2-cents - best of luck with your quest

Edit: I think I remember someone modifying the intake silencer (or whatever it's called) but that would only net you increased sound

Originally Posted by grassy_91

that's what I was looking into seeing if anyone had done that step by step

Reminds me of what people were doing to the stock airboxes on the 2nd gen Lexus is250/350 to get more sound without spending $300 on an intake. OP: for this car if you want to do something simple and not break the bank, I'd recommend the bms (Burger Motorsport) intake to gain a little bit of extra sound.

It's not the cost but more of the stock looking engine bay as California is getting more and more irritating. And this is for my daily driver

[B58]

Originally Posted by chenry

I remember back in my VW/Audi days (mid to late 80's) we would cut holes in the factory airboxes

Swiss cheese mod

[B58]

Originally Posted by Xanderdbs

It's not the cost but more of the stock looking engine bay as California is getting more and more irritating. And this is for my daily driver

Drop in filter is probably your best option. It won't make any noise though. Even with the BMS intake there is some sound, but the inlet pipe has the silencer on it so it sorta cuts away some of the noise.

[jrdoming]

Might be able to do a custom pipe to delete the silencer and run it to the stock airbox which would give more noise. There is a YouTube video I saw a while back where someone order some piping to replace theirs and make the bms intake louder.

[arkitectonix]

You would have to get a new intake elbow to replace/remove the helmholtz resonator on the intake tube for better sound. I just installed the Dinan (since I got a killer deal for BNIB $400). The Dinan retains the lower box, removes the resonator, and adds a bigger air filter. I would personally not go BMS intake. I've read too many anecdotal incidents of it sucking in a lot of the residual hot air and can cause you to run lean, creating more issues. I could be wrong but I've read that you must have the JB4 tune to prevent the CEL from the BMS intake (maybe this is only for the N55?) Yes, the BMS will make a better sound, but Dinan will give me a piece of mind. If cost is an issue, I wouldn't touch the air box at all. It's already very well designed from BMW.

[mike@x-ph.com]

I would not make any change to stock parts in case you decide to sell the car and get warranty work on that specific part

[BornATeste]

I did this, probably didn't change anything tho.
I think there is a slight increase in induction noise.

[B58]

Originally Posted by BornATeste

I did this, probably didn't change anything tho.
I think there is a slight increase in induction noise.

I'm trying to understand what you did here. Just removed the bottom foam?

[ErkanTR16]

I would not mod a stock intake box. Just doesn't make any sense to me.

Buy an aftermarket intake.

[kern417]

I think the main issue with the stock intake is that the box is integrated with the maf housing. On most systems there is a pipe, maf housing, and then separate box. So inside the box you can swap the panel filter for a cone that'll bring in more air. I want a closed intake but not willing to pay $500+ for one.

[BornATeste]

Originally Posted by B58

I'm trying to understand what you did here. Just removed the bottom foam?

I removed the foam and I ground out all of the ribs. The idea was to take advantage of all of the volume of the lower box and smooth out the flow path. The goal being less turbulent incoming air and less restriction to make the 180 degree turn to get into the maf tube. I have no way of proving that this works without flow sim software.

[BornATeste]

If someone has a completely stock lower air box and wants to send it to me, I'd consider doing a dyno session to see if there is any difference.

[Nugget]

I put in the hot climate intake duct and a K&N filter.

https://www.babybmw.net/forum/viewtopic.php?t=112827

[overkill1125]

I'm not sure if anyone has done any of these intake mods while keeping the original filter?

Ross Racing F Chasis B58 Intake/Inlet Pipe:

https://www.ebay.com/itm/Ross-Racing...53.m1438.l2649

FTP Intake pipe:

https://www.ftpmotorsport.com.tw/pro...-intake-pipe-1

[fsugatorbait2]

Originally Posted by overkill1125

I'm not sure if anyone has done any of these intake mods while keeping the original filter?

Ross Racing F Chasis B58 Intake/Inlet Pipe:

https://www.ebay.com/itm/Ross-Racing...53.m1438.l2649

FTP Intake pipe:

https://www.ftpmotorsport.com.tw/pro...-intake-pipe-1

I have the FTP pipe, slight increase in noise. Bought mine second hand otherwise for the $180 they're asking, I wouldn't say it's worth it.

[Wires]

I was going to do a CAI, but they got back ordered forever.

When I check cross sectional area of the inlets and outlets, and the outlet of the inbox is larger than the charge pipe, but the hot weather intake is much smaller.

I figured since the CAI's suck air from the engine bay with "no reduction in power", that yanking that intake pipe off would reduce the restriction.

[UrbanCarCulture]

I thought the growing trend was keeping the stock air box and increase the width of the intake piping as oppose to switching to an aftermarket intake?

Don't you get better results with stock air box?

[weehe126]

Originally Posted by Wires

I was going to do a CAI, but they got back ordered forever.

When I check cross sectional area of the inlets and outlets, and the outlet of the inbox is larger than the charge pipe, but the hot weather intake is much smaller.

I figured since the CAI's suck air from the engine bay with "no reduction in power", that yanking that intake pipe off would reduce the restriction.

So you removed the intake pipe that pulls air in from the radiator area but kept the stock air box? Sounds like the worst of both worlds

[Wires]

If you check the stock airbox, the M3 variant is just the same box, with a larger cutout to suck hot air from behind the headlight. This leads me to believe that if a M3 can produce around 440HP stock on almost the same intake system, then the air box isn't a restriction.

From any dyno plot, the K&N I installed nets about 5HP, a full CAI 9HP. The "hot weather intake" restricts to a small inlet, does a sharp right turn to suck air through a restrictive plastic mesh debris cover. Removing that screen should show some immediate restriction improvements, and I figure it the M cars can pull air from behind the headlight with the same style of box and gain greater gains than my tuned B58, then is it really a bad idea? The hole is still there from the rad, so there should be cold air forced into that area when the car is moving.