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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 03-12-2012, 08:10 PM   #321
Tarmac_E46_M3
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Operation ICFD was unsuccessful... ICFD = Install Carbon Fiber Doors.

I stopped my Ma Shaw to check them out, to see how t would hold up to holding the window motor and all that... Doors look great, almost 100% identical to the Oem doors. Issue was, I wasnt sure if it could support the weight and if I could reenforce it... How can I? So, instead of buying them, I decided to do more research before attempting that. I WILL have cf doors one day...

But, I didn't walk away empty handed. I bought the rear lexan window, oversided to fit it as close in there as possible. So that's next on the list to install, a good 20 lbs once its on. I ordered the rear side windows as well, those should be around next week. I'll wait till I get everything to start working on that.

Now... I want to find out what adhesives and what not I need to install the window to look as close to possible an Oem install.

Any recommendations are welcome!

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Old 03-19-2012, 09:15 PM   #322
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Car is in the shop to get the 4.10 put in, as well as do the entire subframe reinforcement kit (from VAC) and poly bushing in everything back there, except the diff will have solid diff "bushings". Next on the list is coilovers... then I'm taking a break after that. With the cooling system overhaul, fixing all the busted ass bushings and the diff leak... I'm finally drained of money, haha.

But... there is still "inexpensive" stuff I can do. I'll be removing the EVAP soon, that should be a good 10 lbs with everything. I coated the panel between the rear seat area and the trunk with the rubber spray stuff, actually came out really well (I'll post pics later). Idea behind it, is that it will help with the sound coming from the trunk. If I notice a difference with that, I'll coat the trunk with it. Tough, clean looking layer as well as a "lightweight" sound deadening alternative.

You know the trunk floor, how it as that dip in it, where the flat pump thingy was.... well I'm thinking I'm going to cut that out, out a little custom made xbrace under there, then seal it up with a flat 1/8" steel panel. Basicallt get rid of all that extra metal and just make it flat. That way when I coat it too, it I can get rid of the trunk mat (10 lbs there) and the floor won't get scratched up and look weird.
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Old 03-19-2012, 09:44 PM   #323
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What suspension are you going with?

Nice work btw, I love seeing M3's go on a diet!
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Old 03-19-2012, 09:51 PM   #324
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I'll be going with BC Racing ER's, 14k/8k springs (true rear coilover setup). maybe, maybe a step down from that... we'll see.
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SOLD: :( E46 M3 SMG; Evolve-R Tune; much, much more... 2980 lbs.

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Old 03-19-2012, 10:04 PM   #325
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Picture of the trunk path panel covered in the rubber spray stuff:
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SOLD: :( E46 M3 SMG; Evolve-R Tune; much, much more... 2980 lbs.

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Old 03-19-2012, 11:23 PM   #326
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Quote:
Originally Posted by Tarmac_E46_M3 View Post
I'll be going with BC Racing ER's, 14k/8k springs (true rear coilover setup). maybe, maybe a step down from that... we'll see.
We recently became a dealer for BC Racing and will be doing a daily drive-ability assessment and an on track testing/evaluation of their BR kit on our 330i come early April.

If you have any questions feel free to let me know! I'll try my best to get you the best price out there on the ER's. We really see them as having the best bang for your buck suspension solutions.

We will be doing a big write-up and will hopefully be getting some video footage for those of you interested!

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Old 03-19-2012, 11:26 PM   #327
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Nice, sounds,good!!!

---------------------------

So people... Here is ANOTHER extreme idea coming from this guys head.... Side exit exhaust. Yes, I've read how much work it is... Have you seen my car?! Lol.

Well, here's the rough draft of how I see it in my head. Pipes will be 2.5":


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SOLD: :( E46 M3 SMG; Evolve-R Tune; much, much more... 2980 lbs.

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Old 03-20-2012, 12:13 AM   #328
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90 degree bends in exhaust pipes are a huge no no
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Old 03-20-2012, 12:27 AM   #329
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Oh, ok. Why's that? Only reason I thought it would be ok is because the 911/cayman/etc have exhausts with 180 degree bends...

how should it look? This is why I share... Lol... I wasn't sure about the design.



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SOLD: :( E46 M3 SMG; Evolve-R Tune; much, much more... 2980 lbs.

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Old 03-20-2012, 12:54 AM   #330
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This is kind of what I mean, just add an xpipe and resonators in there after the bends... and pretent the bends are better than that, lol. But you get the point:
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Old 03-20-2012, 12:56 AM   #331
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You'll often hear of exhaust systems claiming to reduce turbulence in the exhaust resulting in a net gain in horsepower. But what is the turbulence doing that's so bad? The main thing you need to know about turbulence is that it is inherently unstable and chaotic. The result of this in pipe flow is increased drag, which leads to greater back pressure. While bends and obstructions in the exhaust system yield lower exhaust velocity, they also result in higher turbulent intensity which exacerbates the losses.
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Old 03-20-2012, 01:06 AM   #332
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That makes sense, thanks for that bit f info.

But.... I'm confused now. Is the bend to the exit in my rough draft bad or good? o_O It's definitely not going to be that sharp, but will need to eventually exit in that area, while retaining the passenger seat.
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Old 03-20-2012, 01:18 AM   #333
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Slight bends are okay. Drastic bends are bad. Turbo motors however do require a fair bit more back pressure than our motors so that could explain the case of you seeing exhaust systems with huge bends.

If you do a 45 deg mandrel bend in section 1 before the first resonator and another 45 deg mandrel bend after the second resonator you should get the turn you are trying to achieve without the turbulence.
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Old 03-20-2012, 01:21 AM   #334
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Ah, ok. So, say I did 1 45 degree bend, a few inches, then another 45 degree bend to get the full turn; would that work? Or still an issue? Basically I'm trying to figure out how I can make it work while retaining the passenger seat, so my space is somewhat limited to behind the passengers seat, to fit the exhaust in there.
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Old 03-20-2012, 01:27 AM   #335
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Really hard to say without looking underneath the car. Next time you are under there, look at your exhaust system and think of how you can reroute it with 45 degree bends or less to achieve the location you desire. It could end up being four 22.5 deg bends; three 30 deg bends or two 45 deg bends to get to your target location. Get it?
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Old 03-20-2012, 01:29 AM   #336
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Yeah, that makes perfect sense, actually. I'll check it out once it get's out of the shop. For now, I guess, I can just study the picture in post #330.
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Old 03-20-2012, 01:31 AM   #337
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I didnt see the pic till now, I have an idea for you and will post a pic of my idea in the am.
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Old 03-20-2012, 01:33 AM   #338
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Oh, sweet! thanks.
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Old 03-20-2012, 12:06 PM   #339
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How about this layout, similar to your initial design. Wouldnt have to change much. I would throw a universal muffler at the end rather than an extra set of resonators. Then throw some muffler wrap or heavy duty insulation over the muffler to make the passenger still comfortable.
Click image for larger version

Name:	e46_m3_undercarriage-vi.jpg
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Old 03-20-2012, 12:44 PM   #340
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Quote:
Originally Posted by SH330CI View Post
How about this layout, similar to your initial design. Wouldnt have to change much. I would throw a universal muffler at the end rather than an extra set of resonators. Then throw some muffler wrap or heavy duty insulation over the muffler to make the passenger still comfortable.
Attachment 442780
Yeah, I actually like that. Would probably make the xpipe a better merge too, since its more of a flowing bend than a sharp bend.

I was actually thinking of wrap this morning. Probably also relocating the OEM heat shields with some gold tape in that area too. Then the top I would modify the carpet, or something similar, to keep the carpet like insulation to help more with it sound/heat.

Now... I just need to actually get in there and see how hard it is. My buddy can weld, and he's a mech, I think making the box won't be an issue, we can probably figure all that out. I would definitely want to take it to a pro for the exhaust portion.

Thanks for the input!
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SOLD: :( E46 M3 SMG; Evolve-R Tune; much, much more... 2980 lbs.

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