Airbox mod 2--mpg benefit
#21
![Default](https://5series.net/forums/images/icons/icon1.gif)
If someone has the skills and could make aprototype and also make one for me for the idea
That would be great-heck whover makes it can feel free with my blessing to market them!
The other thing as I have been reading into the art of intake design on modern engines--peak hp is pretty much never gained or effected from the airbox-so a dyno peak hp would not necessarily change-however it is the "tuned" point of the rpm band that can see a 15 percent increase in hp/torque which is not huge but if it is throughout the mid range band which is the goal, atleast in the n52 where it lacks torque and power in the low-mid range-then this would make a big improvement in performance without increasing the peak hp.. whic his why peak hp is often decieving.
Also if someone could even enlighten me on how to make a mold out of fiberglass?
![Smile](https://5series.net/forums/images/smilies/imported/smile.gif)
The other thing as I have been reading into the art of intake design on modern engines--peak hp is pretty much never gained or effected from the airbox-so a dyno peak hp would not necessarily change-however it is the "tuned" point of the rpm band that can see a 15 percent increase in hp/torque which is not huge but if it is throughout the mid range band which is the goal, atleast in the n52 where it lacks torque and power in the low-mid range-then this would make a big improvement in performance without increasing the peak hp.. whic his why peak hp is often decieving.
Also if someone could even enlighten me on how to make a mold out of fiberglass?
#22
Contributors
Join Date: May 2009
Location: SoCal
Posts: 10,496
Likes: 0
Received 2 Likes
on
2 Posts
My Ride: 2008 550I LOADED, all options except HUD and NV
![Default](https://5series.net/forums/images/icons/icon1.gif)
My only question is: What was the brand of tape you used? Any specific model # for the tape?
I think most of us could use another mpg or 2, so this seems like a great and cheap mod to get a little more efficiency - even if it doesn't produce a single HP.
I think most of us could use another mpg or 2, so this seems like a great and cheap mod to get a little more efficiency - even if it doesn't produce a single HP.
![Thumbsup](https://5series.net/forums/images/smilies/imported/thumbsup.gif)
#23
![Default](https://5series.net/forums/images/icons/icon1.gif)
The first go around I just used thick black duct tape 3m. The second go around I used the heat tape simply to add more permenent strength as it is a thicker tape and possibly some heat shielding effects.
As I forgot to note I also put sheets of folded over aluminum foild underneath the tap for additional heat reflecting capability.
IMO any mod that you can "notice" either mpg or butt dyno it is worth it-since afterall the point o fmods is to imrpove driving experience unless you are racing. To me the throttle is so much more effective--not in the sense a sprint booster makes it "touchy" but rather it seems to deliver more power than the ful throttle before this and at a faster rate. My guess is it is increasing the low end torque and hp--not effecting peak hp thus giving some gains down low but at no loss in the high range which is typical with many mods.
As I forgot to note I also put sheets of folded over aluminum foild underneath the tap for additional heat reflecting capability.
IMO any mod that you can "notice" either mpg or butt dyno it is worth it-since afterall the point o fmods is to imrpove driving experience unless you are racing. To me the throttle is so much more effective--not in the sense a sprint booster makes it "touchy" but rather it seems to deliver more power than the ful throttle before this and at a faster rate. My guess is it is increasing the low end torque and hp--not effecting peak hp thus giving some gains down low but at no loss in the high range which is typical with many mods.
#24
![Default](https://5series.net/forums/images/icons/icon1.gif)
Alright guys my final sign in on this mod-I took out my box completely today and went at it with the final layer of The hig reflective foil tape that is rflective on both sides. I completed coated the entire box with this VERY smooth (like glass) tape that also has the big benefit of reflectin radiant heat away but also the smooth glassy surface should do the least to disrupt the air flow compared to a rougher duct tape or even the insulation tape..
My box is WAY louder at this point-I really did a good job to seal off about 1 inch around the box-ultimately changing its measurments around by an inch on each side.
I also a added a layer of duct tape all around the edges where the box's clip together to further seal the box absolutely air tight. It is loud--probalby 70 percent of the AFE open box at this point, I am pretty happy.
Happy modding!
My box is WAY louder at this point-I really did a good job to seal off about 1 inch around the box-ultimately changing its measurments around by an inch on each side.
I also a added a layer of duct tape all around the edges where the box's clip together to further seal the box absolutely air tight. It is loud--probalby 70 percent of the AFE open box at this point, I am pretty happy.
Happy modding!
#26
![Default](https://5series.net/forums/images/icons/icon1.gif)
TOp and Bottom of course-would be useless if you dont do both IMO-I outlined it in the pictures above--it looks pretty cool actually-its all smooth silver mettalic tape all in a big funnel sloping gently from the sides to the intake hole instead of the sharp right angles and waffle baffles of the stock box
#27
Senior Members
Join Date: Jul 2009
Location: N Hollywood, CA
Posts: 615
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 545i Sport Package, Black/Grey. Got it July 09.
Model Year: 2004
![Default](https://5series.net/forums/images/icons/icon1.gif)
is this similar to what you used?
![](http://ecx.images-amazon.com/images/I/41deXRmEbBL._SL500_AA300_.jpg)
![](http://ecx.images-amazon.com/images/I/41deXRmEbBL._SL500_AA300_.jpg)
#28
![Default](https://5series.net/forums/images/icons/icon1.gif)
Thread
Thread Starter
Forum
Replies
Last Post
spediegunz
E60, E61 Parts, Accessories and Mods
0
08-30-2015 09:43 AM