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A dairy for my e90 335i LCI BBK project
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06-14-2022, 03:22 AM | #1 |
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A dairy for my e90 335i LCI BBK project
Hello there, I'm a new holder of an e90 335i LCI sedan from Japan.
This story is to be a diary or archive for my car's mod, turning it from a regular BMW to MY CAR. Hence, there're tons of PERSONAL preferences and biases. It couldn't be a reference, but a pure dairy. However, please make a correction if I'm wrong on some critical points, Thanks! ========================================= The story begins 2 weeks ago when my car's electric pump broke. Since I have to have it repaired, I want to somehow "strengthen" it for better street/touge performance. I don't bring it to a track, but I'm planning to. At the moment my car is totally original, except for the genuine 400M wheels setup (F:225/40/18@8Jx18 ET34+3mm spacer; R:255/35/18@8.5Jx18 ET47+15mm spacer). Then I got a set BMW Performance BBK from ECS tuning. Yes, I have done a little bit of research, that this BBK should be a DOWNGRADE from the stock brake sets because of smaller sizes. The reason I go for it is purely one thing: color. I'm not a big fan of the Big 6-pot calipers in red or blue, which looks like a statement something like "I'm fast". On the other hand, the phoenix gold Performance BBK grabs my eyes, and it should be a nice accent for my white car. And, compared to the F30/80 ///M performance BBK (which also offers a phoenix gold one), the 370/340 rotor seems too big and heavy. In Japan, which is surrounded by tons of low-speed corners (AKA. touge), most of the time I wouldn't make hard breakings like such in tracks. So, the thing I'm serious about is WEIGHT reduction for the 1600+kg body. (And the cheaper 135i rotors) I'm assuming that the brake force itself is sufficient, and the front tires' width is a more critical matter. So I'm going to go for a 255/30/18 @9Jx18 ET?? square setup in the future. The BMW Performance BBK may offer better controllability by the 28/32/36mm diameter piston setup. For the reducing thermal ability, I'm planning for a set of DIY CFRP air ducts. So here is my plan: 1. Reinforce my BMW Performance BBK into steel pistons from RacingBrakes, to prevent cracks of the ceramic piston caps. 2. Have the ///M3 front control arms swapped to increase a little bit camber angle. 3. Fit the rear brake rotors and calipers for the M135i's 4. Have the 255/30/18 @9Jx18 square tire setup 5. If not satisfied, swap to F30/80 ///M performance BBK If somebody gots a similar experience, please don't hesitate to lend me some knowledge I'll make further updates later. Have a nice day! Last edited by EgoMania; 06-14-2022 at 09:37 AM.. Reason: correction |
06-14-2022, 09:38 AM | #2 |
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1 - BMW Performance BBK Reinforcement
As we all know, the BMW Performance BBK has a poor reputation - it cracks.
But luckily there is a potential to prevent it. Yes, the rebuild kit. I got it from RB for the pistons, then got the sleeves from another eBay shop. Here are my kits. This is what the pistons looked like. I have researched for a while, and have found there're aluminum pistons offered by stoptech, and these steel ones from RB. Due to the pistons working in bad thermal circumstances, I just assumed the steel ones could be a little bit more reliable. And, the RB made them "teeth" to block the heat into brake fluids. Here are the optional tools. I bought a portable electric air compressor, attached a nozzle, and tried to pull out the genuine pistons. Luckily, the calipers gave me 4 caps to protect the brake line holes (see the blue stuffs). So I made a tiny cut on one, the pumped air in the caliper. It works! Last edited by EgoMania; 06-14-2022 at 10:31 AM.. Reason: update |
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06-14-2022, 09:41 AM | #5 |
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4 - 255/30/18 @9Jx18 square tire setup
Last edited by EgoMania; 06-15-2022 at 10:04 AM.. Reason: update |
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