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BMW 3-Series (E90 E92) Forum
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Building the E92 328csl
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07-10-2020, 02:34 PM | #265 |
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07-10-2020, 04:34 PM | #266 | |
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They are the lightest seats I could find that weren’t carbon and hella expensive. (Not that these were cheap they were $2k shipped from Germany) They were universally praised as comfortable from guys 5’6” to 6’4”. And weights from 160lbs to 230lbs. They integrated with the pyrotechnic charge in the seat belt buckle properly to allow that function to work as per oem spec. They are the only bucket seat I found that did this, and only for the pole position “ABE” which isn’t sold in the US. I believe this is the single reason they were chosen by BMW for the GTS. This was extremely important to me since I’ll be deleting and coding out side airbags in the oem seats I felt I cannot compromise on safety any further. In the end this made them the only acceptable choice. If I was going to run harnesses then there were other options and I maybe would have gone for the Sparco Evo II. I’m very much looking forward to putting these seats in! I think it will feel like wearing the car rather than sitting in it. I can’t wait!
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07-11-2020, 09:05 AM | #267 |
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I got Recaro Sportster CS's with integral side airbags. The seat belt pre-tensioners were compatible and fitted. But Pole Positions look great in a racer; the Sportsters are more of a DD option, which is what I needed...
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E92 pre-LCI 325i - Ohlins R&T; H&R spacers; M3 strut brace; Swift thrust sheets; 3 x chassis braces; diff brace; N53 V-brace; 034 subframe inserts; BMS clutch stop; BMS CDV; RE g/box mounts; Delrin shift bushes; Saikoumichi OCC; Cyba scoops; BMW Perf Exhaust; HEL s/steel brake hoses; M3 rear spoiler; Recaro Sportster CSs; M3 white dash LEDs; LED Angels; LED side repeaters; BMW Perf black grille; CSL reps; SSDD carbon diffuser; Monster Wrap black roof/clear front
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07-11-2020, 09:42 AM | #268 | |
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I’m really counting every pound on this build trying to maximize the low horsepower N52 have, and paying twice the price for half the weight loss made it a less attractive option. That said, I believe Sportster CS are truly the best seat you can get for our cars if you aren’t counting every pound!
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07-13-2020, 01:21 PM | #269 | |
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07-13-2020, 01:27 PM | #270 |
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07-14-2020, 08:56 PM | #271 | |
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07-15-2020, 10:29 AM | #272 | |
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Biginboca I think freedomfries did similar mod on his car. He might be able to provide some insights as well. https://www.e90post.com/forums/showthread.php?t=1616729 |
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07-15-2020, 10:38 AM | #273 | ||
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Buy a big-ass M10 (or are the M12) piece of threaded rod. Put three nuts on and crank that bad boy down until it crushes. Two nuts lock out at the end of the threaded rod and the other applies the force. I also bought some hardened washers to distribute the load (greasing these really helped). It won't take quite as much force as it looks like, but I greased the threaded rod to ensure smoother operation. You won't need a hardened threaded rod either. Ge the strongest grade they have at Ace and grease it up - will be fine. I wouldn't use that tool you have. Here is what you're trying to do, just on a larger scale: And yes, this is what freedomfries figured out. Huge help! |
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07-15-2020, 10:41 AM | #274 | |
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07-15-2020, 03:06 PM | #275 |
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Thanks. I didn't even know our belts did that. You're right, I wouldn't want to lose this function. Now that I recall when I swapped my interior I had to install the buckles and I recall fitting it into the harness connector. It might still be possible to hook this into the harness with the seats removed.
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07-17-2020, 04:24 PM | #276 |
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Chassis brace install completed today. Thank you to freedomfries and tlow98 for doing all the legwork and paving the way for this mod. Following in their footsteps this took me about 3 hours from taking out the jack to finished cleaning up. It probably would have been an all day project without them paving the way!
For this install you will need 3 items: Chassis Brace p/n 31102283032 4 x M10 Rivnuts p/n 07147199279 4 x 16mm M10 Bolts p/n 33326768354 This is the chassis brace you will be purchasing. To start you are going to drill out the 2 rivets holding the plastic jack pad and remove the pad. Then you need to cut down the brace. Cut the back half of the brace off behind the middle screws. Try to leave as much material as possible in the flat center section before that rear wards hump starts. You should have something like this Now go under your car. Remove your under paneling, just the the 2 16mm bolts that hold the front of V brace to the subframe, and then install the 4 nutserts into the subframe at the outermost hex shaped openings. If you hold the cut chassis brace you made earlier up to the chassis you’ll see exactly where the 4 nutserts go. You’ll also need to permanently remove these 2 panel supports that sit in front of the steering rack Loosely install brace with a couple bolts and trace the V Brace lines with a long ruler over it to mark the triangle cut out. This will show you where you need to remove the triangle section. Also while you have the brace there and are marking it, mark the second hole you need to drill for the second V brace bolt to pass through. The drivers side bolt has no hole on the brace as it comes. (You could also do this after you cut the triangle.) Come out from under the car and cut the triangle, and then flip the brace over and using a BFH lay the brace on a brick or paver and hammer the dimple out which is surrounding the hole the sharpie is pointing to. This whole section needs to be flat to fit under the existing metal V brace. You can see I already hammered it flat and marked that second hole you need to drill for the V brace in this pic Pretty much done now! Go back under the car and using a flat implement (flathead screwdriver, pry bar, etc) pry the V Brace center section downwards from the subframe and slide chassis brace between it and subframe for final install. Install the 4 x 16mm bolts into the nutserts you installed and the 2 16mm V Brace bolts. All done! Install your paneling over it and no one will ever know it’s there!
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07-18-2020, 02:53 AM | #279 |
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Great guide! Driving impressions please...
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E92 pre-LCI 325i - Ohlins R&T; H&R spacers; M3 strut brace; Swift thrust sheets; 3 x chassis braces; diff brace; N53 V-brace; 034 subframe inserts; BMS clutch stop; BMS CDV; RE g/box mounts; Delrin shift bushes; Saikoumichi OCC; Cyba scoops; BMW Perf Exhaust; HEL s/steel brake hoses; M3 rear spoiler; Recaro Sportster CSs; M3 white dash LEDs; LED Angels; LED side repeaters; BMW Perf black grille; CSL reps; SSDD carbon diffuser; Monster Wrap black roof/clear front
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07-18-2020, 09:49 AM | #280 |
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It started raining here after I finished the install yesterday and it hasn’t stopped raining yet. I’ll update once the roads are dry and I can push the car to see how it feels
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07-18-2020, 11:26 AM | #281 |
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07-18-2020, 04:48 PM | #282 |
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It finally stopped raining and the roads dried up here so just took a short ride to check out the results of the chassis plate. It really makes a difference I can feel and I was not expecting this to be as noticeable as it is!
I noticed it right away when I pulled out of my driveway and drove down my street just like I do every day on the same bumps and imperfections. The chassis definitely feels more solid on these little bumps and it adds a little more of that go kart feel to the steering. I really didn’t expect it to make as much difference as it does lol. I would say this was a great addition for $80, 6lbs of weight added, and a few hours work! tlow98 I appreciate your strong endorsement of this mod and I’m grateful you pushed me to do this because it really complements the M3 control arms and M3 steering rack wonderfully.
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Last edited by Biginboca; 07-18-2020 at 04:55 PM.. |
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07-19-2020, 08:57 AM | #283 | |
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In any case, did you end up removing the outer edge of the panel as noted in your post on top of page 12? |
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07-19-2020, 09:44 AM | #284 | |
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07-19-2020, 02:57 PM | #285 | ||
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Also, after seat we nee to see this rig on the scales Biginboca ! You can rent race scales for reasonable iirc :-) Or just drive to a dump Quote:
Closing that bottom - effectively taping up one end of your cardboard box makes an incredible difference. And, as ever, if the factory took the time, energy, and resources to do it, then it's probably a very measurable benefit to the consumer. As far as why people don't do to - most 3 series owners are coming from other, less performance-oriented platforms where this sort of thing never existed and they also aren't coming from the M series, where this stuff is standard. Plus, why do this when you can spend $600 on a burble tune, yo? But seriously, it's a more nuanced thing that takes some digging. There are actually some aftermarket options for lower braces that freedomfries found that look interesting. Some company from Russia makes what looks to be worthwhile bracing. Last edited by tlow98; 07-19-2020 at 11:41 PM.. |
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07-19-2020, 03:15 PM | #286 | |||
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Do you have the name of the Russian company that make these braces please? |
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