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09-26-2019, 05:28 PM | #45 | |
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2011 BMW 128i - Check out my STX build thread!
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09-27-2019, 02:27 PM | #46 | |
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That said, to my eye the decreased steering angle is not speed dependant, so seems like a mechanical effect, not an aero one. The slowest corner on that track (5) is so dynamic with changes in elevation and camber that one never approaches steady state. All the other corners are longer and more directly comparable. Not that there is a huge variation in corner speeds to compare. Also, less steering is required at every point in the corner, even before there is appreciable cornering force generated. The decrease in steering angle seems to be proportional to steering angle, not speed or speed squared. That seems like a mechanical effect to me. |
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ajsmithvmi92.00 |
09-30-2019, 01:41 AM | #47 |
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Partly inspired by your thread, I ended up doing a project replacing most of the rear ball joints with the Lemforder 3067901 joints. I ended up a local group buy for these and the parts turned out really well.
Installed the rear M3 control arms and pressed in the Lemforder ball joints in them. The mounting face for the arms is tapered so I did a simple CAD design and we got the adapter washers CNC'ed out of 304 stainless. The ball joints pressed into the trailing arm bushing locations. The ball joints were pressed to depth taking into account the thickness of the custom washers I already have the German Auto Solutions front monoball pressed into the M3 arms, and the rear end is now fully ball jointed apart from the inboard camber link. With this current setup I note that the rear end is a lot more stable and doesn't move around as much, less oversteer when I throw the car into a corner. Was suprised at the improvement even when not driving that hard. Addtionally I note the rear end is more compliant/comfortable over slow/medium bumps and less comfortable on sharp bumps. The damping overall seems to be better without the rubber bushes twisting up and contributing to the overall spring rate.
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Last edited by vtl; 10-06-2019 at 05:35 PM.. |
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10-05-2019, 07:22 AM | #49 | |
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a Stay tuned! |
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10-06-2019, 05:36 PM | #50 |
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Fixed up the image links, bimmerpost has broken them all
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10-08-2019, 04:05 PM | #51 |
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If someone wanted the conical adapters could the cad files be shared, perhaps for a nominal fee? Hypothetically of course.
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MCS 1WNR Dampers | Ground Control Camber Plates | E90 M3 front control arms| E90 M3 front tension arm w/ Turner monoball bearings | E90 M3 Steering rack conversion | SPL Adjustable Outer Tie Rod Ends | M3 Rear Camber Arms | SPL Adjustable Rear Toe Arms | M3 Front Caliper Conversion | 275/35/18 Toyo RA1s | 18x9.5ET22 Apex EC-7’s | mFactory LSD | AIM EVO4S with GS Dash | New for 2020: LS1 Swap!
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10-08-2019, 05:38 PM | #52 | |
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Anyone interested in following how the project turned out from start to finish can see in my build thread here https://www.1addicts.com/forums/show....php?t=1302309 Installation notes Due to the fact that the Lemforder mounts are only 1.5mm narrower in width to the stock tapered bushings, there is no space to make a tapered washer 1.5mm thick. I ended up designing the washer to be 4.5mm thick, then pressing the ball joint offset 3mm to make the geometry the same. Illustrations here: https://www.1addicts.com/forums/show...&postcount=293
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10-09-2019, 02:37 PM | #53 |
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Thanks!
On a related note, will the lemforder ball joints fit in the non-m suspension arms?
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MCS 1WNR Dampers | Ground Control Camber Plates | E90 M3 front control arms| E90 M3 front tension arm w/ Turner monoball bearings | E90 M3 Steering rack conversion | SPL Adjustable Outer Tie Rod Ends | M3 Rear Camber Arms | SPL Adjustable Rear Toe Arms | M3 Front Caliper Conversion | 275/35/18 Toyo RA1s | 18x9.5ET22 Apex EC-7’s | mFactory LSD | AIM EVO4S with GS Dash | New for 2020: LS1 Swap!
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10-09-2019, 05:11 PM | #54 | |
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The curved upper camber arm has an additional benefit in that is provides extra clearance for the M sway bars if you ever wanted to go down that route. Otherwise at full droop the straight non M arm actually touches theM3 sway bars and certain aftermarket sway bars.
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06-17-2020, 04:46 AM | #55 | |
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I'm trying to decide between Turner/GAS and another option which claims it has more than 2.5x the impact & load bearing area... but I'm skeptical... |
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06-17-2020, 04:07 PM | #56 | |
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For your info, the crests on my worn out part measure 2.742" diameter. Looking at the worn crests it is apparent that they represent only about 50% of the bearing area. It is not unreasonable to assume that when new they only provided 40% (= 100% / 2.5) of the available bearing area, although I would guess even less. The diameter of the part I made to replace it is 2.758", with 100% bearing surface. |
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06-18-2020, 12:43 PM | #58 |
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10-23-2020, 10:48 AM | #60 |
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Can anybody confirm that Lemforder 3067901 is the same as Lemforder 33326792553? They look the same but I'm unsure about the dimensions.
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10-24-2020, 07:05 PM | #61 | |
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33326792553 has an OD of 47.3 mm. It is the standard outboard camber arm bearing that is pressed into the bearing carrier. |
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10-24-2020, 07:13 PM | #62 | ||
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ModeCarbon V1 CF lip/PF AG CF SS ext./ARKYM CF Diffuser/OSS AE's/B&G Springs/CF Performance Spoiler/V2 Led Performance SW/Meisterschaft GT exhaust
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