Velocity stack filters1/6/2024 ![]() ![]() You can use a CSL style oil dipstick or bend the stock one to move it out of the way. You can see the trumpets are held in place using the factory pin (right trumpet, just under my index finger to the right) I could have probably found a cheaper filter, but let's face it, the ITG filters look sick. Cost me about $175 all in including the CSL conversion pieces, the most expensive part was the ITG filters. You don't want to vent into the engine bay, especially close to the air cabin intake, it stinks, ask me how I know. I also routed the brake booster air shutoff valve into the same place. I used the stock airbox oil drain on my catch can so I would never have to empty mine. You'll need to route your valve cover vent hose into a catch can, and then do something with it. You'll probably want to do some air ducting to duct cold air towards the trumpets.Ħ) PCV system. You can wrap it with vinyl or spray paint it. This is the template I used from somebody over on m3cutters - thank you - I used a thin piece of aluminum I bought at Home Depot. I used ITG JCS-11 filters, you can get them here Ĥ) You'll need to run alpha-n or do a CSL conversion as I did, so external IAT sensor and/or CSL MAP sensor depending on if you're alpha-n or not.ĥ) You'll probably want to make a plate that goes under the trumpets and helps direct air. The pre 10/2004 are where it's at.ģ) Get some filters, while rolling without might look cool sucking in small children and breaking your engine isn't. You can grab the STL and print/modify it yourself off my website here: Ģ) pull your stock trumpets out of an airbox - I bought a spare online for $40. There is a flat part of the clamp in the middle, that side you'll want to print facing down towards the build plate. You'll want to print it in ABS or PETG as it has better heat resistance, I used PETG. My clamp uses the pre 10/2004 style throttle body boots BMW part number 11612466477. Basically, unscrew the endcap off the trumpets and either cut or push them out. This is really the same as the PSDesign kit - they use factory ITBs too although they say otherwise.ġ) You can use my trumpet clamp design if you'd like, it's made for pre 10/2004 style trumpets. If anybody else wants to try, the shopping list is pretty simple. Windows up, my daughter filming - it's a bit definitely louder in real life, especially with the windows down. I have a stock exhaust so the car is basically stock quiet until over 3000rpms and than you Any sound clip / video would be awesome as well □Sure, I'll keep you posted. ![]() I really wonder how it'll do in the longer term - please continue to post as time goes on to show the progress? Perhaps this could be a beta for a kit that you could potentially provide for the community if enough people have interest. Probably my best option is to use a CSL style airbox.so that's why BMW made that eh. I've thought about running hose into the exhaust using a venturi valve, or perhaps routing it through an oil separator/oil catch can and then into the IACV.but I'm not sure I want to route it directly into the IAVC - sounds like a great way to gump up the IACV. The stock system dumps back into the airbox so you don't smell anything, but running open velocity stacks there really isn't a good place pipe that back into the intake. I've designed a plate to go under them to help direct airflow into the trumpets, but I haven't put it on since I'm not sure if I want to keep this setup or not.īut it's the PCV system, running an open PCV sucks - just sticks. The PCV can was my first beta print, I was going to reprint one in black or paint it black - I just had a bunch of white filament.įor tuning, I'm running MSS54HP non-h-bridge DME using a stock CSL tune with a CSL MAP & IAT sensors. Literally, the only thing that cost any money was the ITG filters ($22/each) Stock thumpets out of the stock airbox - same as the CSL turmpets.Īlso designed a PCV catch can to route brake booster and valve cover vent, it connects on the bottom to the stock oil return I designed a clamp in Fusion360 that holds two trumpets together (so you need three total) so all the factory trumpets can use all the stock mounting hardware. While I've been designing a CSL style airbox in my spare time I designed I'd try the Velocity stack / open ITB setup. ![]()
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