01-08-2019, 06:53 PM | #1 |
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328i brake system upgrade thoughts
I have a base 328i with the stock base brakes. Personally I think they are awful (at least for my spirited driving) and definitely don't make me feel comfortable under heavy braking or braking from high speeds.
I'd like to purchase a BBK, but the price for a kit is extremely expensive (brembo, stoptech, even oem m-sport, etc.) I know brakes are not something to cheap out on so I come here asking for any thoughts on how to improve my brakes. I was thinking about getting drilled rotors, carbon pad and better brake fluid. No specific brands yet, just thinking about cheaper alternatives to shelling out $2k-$3k for a BBK. Any thoughts on this? Also suggestions on brands for pads & rotors appreciated. Or would this all be a waste of money in the end? As ugly as the base brakes are and how much I'd love a nice set of fat brembo's, stopping more reliably is most important. Or should I just save $$$ and eventually get a BBK? Note: My brake system is in good condition. The pads have plenty of life left on them, rotors are good, no warping or rough spots and my brake fluid is fine as well. So that isn't the reason for the poor performance of these brakes.
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01-08-2019, 07:05 PM | #2 |
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You will see a nice improvement with just changing the pads. Drilled rotors only benefit you if you do a lot of extremely hard braking (allows the gasses to vent) which is more for track use. Brake fluid doesn't really do much.
Brembo should have replacement pads for your setup. |
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01-08-2019, 07:12 PM | #3 |
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Agreed. Look at the options for Porterfield & Hawk pads. Usually you can expect more dust on your wheels with improved braking.
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01-08-2019, 07:16 PM | #4 |
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I'm on the same stock brakes. Just pads alone will help a lot, I'd suggest trying that first. If you're going to upgrade rotors, go slotted over drilled. The combination of RBF 600, EBC Reds, ECS slotted rotors, and SS lines performs better than you'd expect on track. There are many pad options, for a OE+ try out Akebono, further than that an Porterfield or EBC offering.
Just know that brake performance is really dependent on tires. Big brakes are good for big heat absorption, not necessarily stopping quicker.
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01-08-2019, 07:21 PM | #5 |
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Thank you everyone for the feedback so far. I will look into suggested brands and it's good to know I have other options. I can't see myself tracking the car so it doesn't have to be over the top. I'm also going for a kind of sleeper build in the sense that I don't have many aesthetic mods but rather performance. So base brakes with better stopping power should be perfect. Eventually I'll buy a BBK, keep the bright colors down but for now, this helps a lot. Thanks again everyone
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01-08-2019, 07:41 PM | #6 | |
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01-08-2019, 08:00 PM | #7 | ||
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01-08-2019, 08:03 PM | #8 |
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Will do. Looking around, hawk has both front and rears at good price point for street and light track pads. But will keep looking. Will update once decided.
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01-08-2019, 08:04 PM | #9 | |||
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01-09-2019, 01:28 AM | #11 | ||||
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01-09-2019, 07:59 PM | #12 |
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Don't waster your time upgrading the rotors, you will not notice any improvement there. Also, unless you're on the track, where you could potentially boil over the fluid, reg brake fluid is fine. Just make sure your bleed the system often to get the air out. You will notice the brakes being more "responsive" when you do. Just takes the mushy feel out of the system by removing the air out of the lines. Stainless steel lines also would help with that.
Better pads (more performance oriented pads) will definitely help with stopping power. I like PFC pads from my experience (Porsches and M3), but have no idea if hey make a pad for the 3 series, i bet they do. |
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01-09-2019, 08:34 PM | #13 |
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I kinda knew rotors wouldn't make a big improvement, I figured I'd get some slotted half for the look and half because by the time I do pads and stainless steel lines (at the least), I'll probably need to replace the rotors anyways. I can't imagine I'd do a track day but on some spirited back road driving with many turns I may just get better brake fluid. Correct me if I'm wrong, but performance brake fluid wouldn't change braking for daily driving? So mine as well for those days of hard braking here and there.
Also I will check out used kits for 335 or m3. Would there be any fitment issues (besides wheels clearance)? Like with the brackets?
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01-14-2019, 04:21 PM | #14 |
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I recommend stoptech rotors and pads
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01-19-2019, 10:37 PM | #15 |
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I had StopTech Sport pads and stainless limes on my F22 and it made a big difference. I also went with ATE fluid and did a fluid flush and the pedal feel was awesome. Tons more brake dust though because of the softer pad compound. The wear sensors didn't fit the pads so I just tied them up. I am going this route with the F31 as well but will add slotted rotors from StopTech' cryogenically treated line. Spent less than $500 total and made a huge difference for street and mountain roads.
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01-22-2019, 05:33 PM | #16 |
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I had the same dilemma as you. But from my experience race teams use stock brake sizes in endurance racing and it works for them. The setup just needs to be right.
Anyways here is my setup for fun spirited driving and back rounds that has not faded yet and brake feel is improved over stock Base brakes along with stopping power. *E90 Sedan or Coupe 2007 to 2012 rotors are exact same as the F30 with 312mm front and 300mm rear base brakes* Slotted Rotors (I Believe they are PowerSlot Rotors) Hawk HPS 5.0 pads Goodrich Stainless lines Motul RBF600 Fluid
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01-22-2019, 05:54 PM | #17 | |
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01-24-2019, 03:31 PM | #18 |
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Yeah, some pieces from the older gen usually are compatible with the new gen as I have found from time to time when I get the cars in to the shop and check on the parts etc.
For this setup I confirmed with NAPA, Autozone, and Oreilly. Also checked part numbers and all match and checked out. So Pulled the trigger and all fits and was the same. This only works if you are a Sedan or coupe and only get the Sedan or coupe brakes for the e90.
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03-18-2019, 07:58 PM | #19 |
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*Update*
Just purchased Hawk 5.0 pads front & rear as well as Stoptech stainless steel brake lines. My rotors still have good life on them and to "brake" up the cost (pun intended) I'll get new rotors down the line.
I'll keep updating with how just the pads and lines will improve the cars braking capability. I'd imagine these two things alone will bring noticeable improvements. Going to an event at Princeton Airport in 4/6 that involves runway pulls so upgrading the pads and lines seemed like the minimum I should do for this to feel comfortable braking from high speeds with not a ton of road. I should be able to get them in time and hopefully installed on the 328 before the event!
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03-18-2019, 10:45 PM | #20 | |
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I don't recall the stock caliper/rotor setup on your car. My 2015 335i x-Drive came with 4-piston Brembos on the front and 1-piston Bosch calipers on the rear. A lot of front dive on hard braking. On the recommendation of an ex-racecar driver friend, I found a pair of used rear M-Sport 2-piston (blue) Brembos and their stock rotors. Along with the Hawk 5.0's and SS lines, the car now squats on hard braking instead of front diving. A huge difference! Oh, I highly recommend G2 Epoxy Caliper paint. I did my front and back calipers in gloss black and added white Brembo decals. (Pay really close attention to the recommended operating air temperature. If the air temp is too hot the paint gets really thick and doesn't flow as well. Follow instructions and the paint will flow and even out like you sprayed instead of brushed them.) Awesome finish and it's wearing like iron. I wash the car and the calipers look like brand new. I also wired brushed the rusty brake hats and used G2 Silver epoxy. Now they look brand new all the time too. Hope this helps. |
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03-19-2019, 03:48 PM | #21 |
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I'm thinking I will definitely see big improvements with my braking after these simple upgrades. Unfortunately I have the base model and I have standard 4- piston fronts, but not brembos. The rotor size for base brakes is 312x24 front 300x20 rear.
This is a temporary upgrade for my base brakes until I can find a good deal on some 4-piston fronts brembos from a 335 m-sport/ m3/ etc. at that point I will have hawks, stainless steel lines and better rotors then I will be more than okay for my driving habits. I will look into that paint as well. But I know a decent amount of shops that powder coat brake calipers for good prices. I have seen that last quite a long time as well. Thanks for all your input, I appreciate it!
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03-19-2019, 07:15 PM | #22 | |
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Stick with pads and fluid, ss lines if you want to, you'll notice a big improvement. The only F30 in motorsports actually ran the same basic setup with two piece rotors.
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