Modified Air Box
#1
MBWorld Fanatic!
Thread Starter
Modified Air Box
Hey guys, I would like to modify/customize the air box for your Mercedes. Im making them now for the C43. Is the air box you guys have the same as the C43?
If yes email me at geo3617(@)gmail.com if you're interested in buying one. You also have the option to send me your air box and save 80.00.
What I do is make the air box taller to breathe better. And I remove all the square baffles from inside the air box for smoother and less restrictive air flow.
After I do the work on the air box it will be like the Renntech air box minus the carbon fiber and minus the price that it sells for. The Renntech box goes for like $1500 plus your box.
I'm charging $525.00 shipped to your door.
Custom air boxes have shown 10HP and same with torque. I made one for myself and honestly loved it. So I decided to make more for those interested. I will upload some pictures later.
If yes email me at geo3617(@)gmail.com if you're interested in buying one. You also have the option to send me your air box and save 80.00.
What I do is make the air box taller to breathe better. And I remove all the square baffles from inside the air box for smoother and less restrictive air flow.
After I do the work on the air box it will be like the Renntech air box minus the carbon fiber and minus the price that it sells for. The Renntech box goes for like $1500 plus your box.
I'm charging $525.00 shipped to your door.
Custom air boxes have shown 10HP and same with torque. I made one for myself and honestly loved it. So I decided to make more for those interested. I will upload some pictures later.
Last edited by speed43; 07-02-2020 at 10:18 AM.
#3
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Thread Starter
Here's how they come out minus the gloss. Gloss was just to show the quality of the air box....
Notice the oem how low the top plastic is in the front where the air flow sensor hooks up. After modification it's about 4 inches taller! The hood does close perfectly.
Notice the oem how low the top plastic is in the front where the air flow sensor hooks up. After modification it's about 4 inches taller! The hood does close perfectly.
#6
MBWorld Fanatic!
There is a purpose to the baffles to allow "even flow" across both sections of the intake - kindof intentional - and frankly the stock box has never been accused of being restrictive - although a good thing to replace both air filters frequently/like-5K miles
#7
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Thanks. I been trying to see how I can go about finding at least one person to test out my air box. I'm interested in finding out if it will fit other cars. The difference from stock is height. So if the box don't fit I like them to tell me how much to lower. You say you're curious, can I ask about what? Is it if it will actually make power or...? Also, do you have a Mercedes that uses the c43 air box? If yes would you like to be a tester?
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#8
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Thread Starter
So now I leave the strips of plastic that go the same direction as the air flow.
I get rid of the small plastic ones which than takes away the square to leave the longer ones to direct air. Hope that makes sense.
#9
Junior Member
Thanks. I been trying to see how I can go about finding at least one person to test out my air box. I'm interested in finding out if it will fit other cars. The difference from stock is height. So if the box don't fit I like them to tell me how much to lower. You say you're curious, can I ask about what? Is it if it will actually make power or...? Also, do you have a Mercedes that uses the c43 air box? If yes would you like to be a tester?
#10
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1922 Ford Model T / no OBD
My 320 in W211 body has one of those big boxes, what I think gives less restriction than older box with single filter, but there is no way I can measure the difference if such exist.
In my teen years my hobby was flying models and one of the first engine modification was polishing the intakes, what did make noticeable difference from sand-cast aluminum passages.
But those were miniature engines that could pump close to 1 HP from cu cm.
Comparing to 3,000HP from 320 engie
Last edited by kajtek1; 04-14-2016 at 12:03 PM.
#11
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Thread Starter
Can you snap some pics from under your hood? I need close ups of the top,and the sides of the air box. And if you could reach to the MAF and firewall and snap a picture. Also if you could check how much clearance you have from the middle of the air box to the hood insulation. On the c43 it just barely clears but hood does close. I'm hoping your car has better clearance or same so I don't have to make the box smaller.
#12
Junior Member
Can you snap some pics from under your hood? I need close ups of the top,and the sides of the air box. And if you could reach to the MAF and firewall and snap a picture. Also if you could check how much clearance you have from the middle of the air box to the hood insulation. On the c43 it just barely clears but hood does close. I'm hoping your car has better clearance or same so I don't have to make the box smaller.
#13
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Thread Starter
Wow that's a lot of cars! I will pm you my email.
#14
MBWorld Fanatic!
You know there was a thread in the w208 section about air boxes. The used the 320 box the 430 box the 55 box and an e55 box too I believe. The used all new filters of the same brand and did dyno pulls with each one. The 320 single arm box had the best HP number out of all of them.
#15
MBWorld Fanatic!
Thread Starter
Hey guys OOgsAggie, was nice enough to post the cars that fit the renntech air box. So mine will also fit those cars and the ones you own. So if your interested send me an email at geo3617(@)gmail.com.
Last edited by speed43; 04-22-2016 at 07:13 PM.
#16
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Test Fitted Today
Thanks to SerbNerd as he came by today and allowed me to try my custom air box on his car. It will fit but you have to remove the cover below. Because it does touch the air box. Not much of a big deal for the gains you will get, but its up to you. The other option would be for you to send that part to me so I can modify it. Than i will send the air box and the modified cover and your set.
Soon there will be a user review, hopefully by next week.
Heres some pics that show how to remove that cover.
Soon there will be a user review, hopefully by next week.
Heres some pics that show how to remove that cover.
#17
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2001 E430, 2002 ML55
The plastic shroud we removed is used to "buffer" air from the slits on the hood to the cabin air intake/filter.
Not sure why Mercedes made it so large but imo it's not needed. Modification to this shroud can be done to not have it dip so low into the engine bay.
I'd like to test the box compare to the stock one on a dyno. Assuming it's similar flow wise to the renntech CF airbox, this would be a great upgrade while retaining the stock look when opening the hood! Personally I don't like the look of carbon fiber :p
Not sure why Mercedes made it so large but imo it's not needed. Modification to this shroud can be done to not have it dip so low into the engine bay.
I'd like to test the box compare to the stock one on a dyno. Assuming it's similar flow wise to the renntech CF airbox, this would be a great upgrade while retaining the stock look when opening the hood! Personally I don't like the look of carbon fiber :p
#19
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Thread Starter
It does yes. But cant have everything all the time you know. Wish i could have helped you guys keeping everything stock AND improve your performance. But either that cover comes off or gets modified in order for the performance gains. I will have the box i made for this model next week sometime. If any of you want it just let me know, but you have to take the cover off.
Last edited by speed43; 04-23-2016 at 01:44 PM.
#21
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Thread Starter
Not trying to debate with you. Just sharing a solution for performance gains.
I have come up with a solution to make your cars go fast and smooth. You guys just need to think how to go around these small obsticles. The power is so well worth it!
Last edited by speed43; 04-23-2016 at 02:11 PM.
#23
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http://www.ebay.com/gds/How-Will-a-P...7633507/g.html
Last edited by speed43; 04-23-2016 at 04:03 PM.
#24
I just wanted to share that I tried out the modified airbox on my E55 today. I didn't drive enough miles for the ECU to adapt, but I felt benefits nonetheless. Throttle response felt snappier and low end power felt stronger. The motor seemed to rev more freely. I have a loud exhaust note but I think I could hear a nice sounding induction noise in the mix.
I did have to remove the hood panel in order to close the hood for the test drive. In full disclosure I'm not willing to modify the panel to get the box to fit, so I sent the box back to speed43 today. I do think he is on to something with his modifications. I'm looking forward to dyno results. He is willing and capable of making modifications in order to make this work. So if you're interested, I would contact him to discuss your options.
I did have to remove the hood panel in order to close the hood for the test drive. In full disclosure I'm not willing to modify the panel to get the box to fit, so I sent the box back to speed43 today. I do think he is on to something with his modifications. I'm looking forward to dyno results. He is willing and capable of making modifications in order to make this work. So if you're interested, I would contact him to discuss your options.
#25
Super Member
Maybe if the rear of the airbox is a little rounded like the RennTech carbon box instead of squared out, the airflow might be better and not have it so high. You then don't have to take out the plastic piece on the top...Just a thought
Last edited by snooozie; 06-05-2016 at 09:20 PM.