[pwr hungry]

I thought I read in a thread recently that there are ducts for the M3 rep bumpers now so you don't have to run the crappy fogs. Does anyone know if they have them for cars with the factory oil cooler and if so, where I could get my hands on them?

I've been randomly working on reworking a set of OEM M3 ducts for the past 7 months and would be more than glad to just throw them aside for some prefabbed ones! haha

[pwr hungry]

Anyone?

[Marcadelic]

i think the only ones are the oem ones

[Game]

7 months of reworking the OEM ducts??

Took me 5 minutes with the dremel and got them to fit no problem.

[FlowState]

https://www.pegasusautoracing.com/gr...oupID=DUCTBUMP

use a dremel as needed. $140 for a piece of plastic is the most retarded thing I've ever heard. The most expensive one here is $30 so just make a custom one.

[pwr hungry]

Originally Posted by Game

7 months of reworking the OEM ducts??

Took me 5 minutes with the dremel and got them to fit no problem.

When you work on it like 20 min at a time and want everything to mount like oem, fit like oem, and look oem, it takes a little more work than trimming. I would be interested in pics of yours on the car for comparison though if you don't mind.

[pwr hungry]

Originally Posted by DUI Elite

https://www.pegasusautoracing.com/gr...oupID=DUCTBUMP

use a dremel as needed. $140 for a piece of plastic is the most retarded thing I've ever heard. The most expensive one here is $30 so just make a custom one.

Appreciate the link, but perfect fit and finish is worth the money to me...i can always just work and make more.

[Game]

Originally Posted by pwr hungry

When you work on it like 20 min at a time and want everything to mount like oem, fit like oem, and look oem, it takes a little more work than trimming. I would be interested in pics of yours on the car for comparison though if you don't mind.

Best I could do -

[FlowState]

Originally Posted by pwr hungry

Appreciate the link, but perfect fit and finish is worth the money to me...i can always just work and make more.

More power to you.

Some people enjoy working on their car with their own two hands and save some coin while doing it. Just threw the link in in case OP wanted to build one for himself. Its not hard to do. Its not hard to be perfect if you're passionate about it. You're more likely to have a guy cutting corners to beat book time at a shop so he can make more money at the end of the day.

[pwr hungry]

Originally Posted by Game

Best I could do -

Looks great from the vantage point. If you can, do you mind taking some close up pics once the weather there gets better?

[Deep_Blue]

This is timely... my car is in the shop right now getting my M3 rep front painted.

I bought the OEM vents from ECS. Took the factory front off myself to save some labor.

The passenger side vent bolts right up. Trimming isnt necessary but to make it fit perfectly i trimmed a small triangle off above the mounting location closest to the engine. <<<EDIT: This is true for fittament to the cooler, but not to the bumper. The passenger vent does NOT line up with the M3 rep bumper duct inlet. I didnt learn this until test fitting at the body shop.

Pictures below show the before and after. Sorry for the picture quality, it was dark and rainy, and the watermark, i forgot i was shooting RAW and had to use a cheapo converter I downloaded to view on my laptop.

Before and after:







The driver side vent on the other hand, is not in any way compatible with the 335. On the M3 it goes up into the airbox (or hood vent, cant remember which). So you essentially have to trim it so that there is just an open hole facing up in front of your wheel well liner (up toward the charge pipe, driver's side of the engine). There is a little lip on the vent (looks like to catch water and debris) but I'm concerned this setup would throw a bunch of crap from the road up into the engine bay.

My body shop just quoted me $547 to paint and install the front. I think the whole vent thing is driving up the cost (3 hours to fit and trim parts)

Part of me just wants to say paint it and I'll do the rest.

Oh and here's the bumper in front of the car, just for fun

[pwr hungry]

Thanks Deep Blue. I wonder if it's different for the e92s? On my ducts i cut and fabb'd in brake ducts to keep all the OEM functionality. That's the part that is so time consuming. I just wish a company would take this on and sell some. :/

[Deep_Blue]

Originally Posted by pwr hungry

Thanks Deep Blue. I wonder if it's different for the e92s? On my ducts i cut and fabb'd in brake ducts to keep all the OEM functionality. That's the part that is so time consuming. I just wish a company would take this on and sell some. :/

What did you do on the driver's side? On the e90 the ducting feeds into the wheel well. Its a pretty sorry excuse for brake ventilation if you ask me. Did you route the duct back down into the wheel well?

It could be a good feeding duct for a Mr5 intake

[pwr hungry]

Originally Posted by Deep_Blue

What did you do on the driver's side? On the e90 the ducting feeds into the wheel well. Its a pretty sorry excuse for brake ventilation if you ask me. Did you route the duct back down into the wheel well?

It could be a good feeding duct for a Mr5 intake

I cut the snorkel off and plastic welded over the huge hole, cut a hole in the back and the used HVAC foil tape to create the shape to mold plastic around to get from the M3 duct back to the opening in the fender liner. I'll try to get pics of what I have so far up this weekend maybe if I get motivated to pull the bumper and get the shaping for the passenger side mocked up.

[Deep_Blue]

Wow thats intense. Im leaning more toward just having the shop paint the bumper, then doing the ducting and install myself. I think i could set it up to feed directly to a cone filter (with some sort of screen installed over the top of the ducting outlet in case a rock, acorn, or chipmunk decides to visit at high speed).

If i did brake ducts again i think I would do tubing to directly behind the rotors.

[pwr hungry]

Originally Posted by Deep_Blue

Wow thats intense. Im leaning more toward just having the shop paint the bumper, then doing the ducting and install myself. I think i could set it up to feed directly to a cone filter (with some sort of screen installed over the top of the ducting outlet in case a rock, acorn, or chipmunk decides to visit at high speed).

If i did brake ducts again i think I would do tubing to directly behind the rotors.

Yeah, i'd love to do that if i had a lip like the GT one or whatever it's called, but i went with the much more affordable Vorsteiner rep for the M3 rep bumper.

[Deep_Blue]

Its official, just having the shop paint and trim off the foglight brackets. I'm doing the install myself. Now just need to flind a floor jack....

[pwr hungry]

Originally Posted by Deep_Blue

Its official, just having the shop paint and trim off the foglight brackets. I'm doing the install myself. Now just need to flind a floor jack....

Throw up some pics of what you come up with!

[pwr hungry]

Ok. So, I finally took the time to get out into the garage and work on the last rendition of ducts for the car today. The only things left to do to them before putting them on are a skim coat of plastic on the passenger side duct to fill in any negative spaces, sand and then paint flat black. On to the pics and info.

Driver's side duct:









Now, you may be wondering what you're seeing...the white is a Fusor spread on plastic that I am using as a filler, and the areas of black plastic that are not from the original duct are just fiberflex plastic welding rod that was added bit by bit to build up every inch of "new" duct. More on that in a few. This is what it looks like installed at the moment.







The last image is shot from the wheel well to show how nice and flush the brake duct portion lines up with the fender liner.

Next, the passenger duct, which was what I focused on today. This one has been quite a pain in the ass. It has the most going on and in order to keep it fully functional I had to cut the front half off of the back half, realign it, and then weld it all back together. Then I cut an opening in the bottom right portion to build out the brake duct. The pics below show the method I employed to mock them up and then build up all the plastic necessary to create what I have now. And the pics:











And a few "installed" pics:







Lastly, some pics of the passenger side duct with all the fiberflex rod built up. I have a few more bits of foil tape to pull out of the inside and then I'll apply a skim coat of Fusor plastic, sand it smooth, and then paint it flat black.







Now the fun part!!! I'm thinking that once they're fully finished, I may just mold the interior cavities of the ducts and do a little experimenting with DIY vacuum molding. I really need a hobby and it seems like a good one. lol. So, if all goes well, and you guys like the way these turn out. I may turn some of these out for those of you that ask nicely. Although, given it's taken me like 7 months to suck it up and do the work to get this far, I wouldn't hold your breath for any copies to be anytime soon. Feedback welcome. Just don't be negative and not create your case please.

[Deep_Blue]

Wow, looks like you've put a lot of work into those.

The only concern i see is with your passenger vent shown below



It looks like there is a sizeable lip below the oil cooler directing air back into the wheel wells. The OEM fit for the original oil cooler duct and the M3 duct is to fit tight against the oil cooler so that air has nowhere to go but through the cooler. I would be concerned that you are giving the air a path of lesser resistance into the wheel wells, diverting it from your oil cooler.

My concern would be trading oil cooling efficiency (which is huge in these cars, especially if running at tune) for brake cooling that is marginal at best.

All those ducts do is spit air into the wheel wells. A real brake cooling system looks like this.

http://www.m3post.com/forums/showthread.php?t=316897

I think adapting something like this to the 335 would be much more effective than the stock ducts and would free up the passenger duct to be solely devoted to oil cooling, while leaving the driver duct free for some kind of intake DIY.

[pwr hungry]

Yeah, i've wondered about where the air is gonna go too and am going to try to hook a floor fan up to the duct once it's installed and see what happens. I've been running ductless since putting the bumper on and temps have been fine, but we'll see once it's all said and done. If it negatively impacts cooling, it'll definitely get changed.

[Deep_Blue]

How easy is it to work on the ducts with the bumper on? If you take off the lower shield can you get them in and out?