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01-25-2023, 05:54 PM | #133 | |
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02-01-2023, 03:43 PM | #134 | |
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Giken diff is great, on track I can feel it lock up faster than my OE diff, then on the street it is completely silent and quite similar to OE. Perfection for a street/track car. A lot of other mods I would rank before the diff--such as suspension, bucket seats, safety stuff, even exhaust (I love the sound of the S65) but still think this is a good mod and I'm glad I did it while my car was down. I actually suspect changing the ring/pinion and final drive ratio would be more bang for your buck but also would just swap the diff at the same time if you were going to the trouble. I left mine 3.15 (DCT) for now since I haven't made a final decision on supercharging (or not) yet. I should also note that for a track focused car, I would follow dogbone's advice and also do a Spec X customized OS Giken so that the locking behavior is optimized for the track. For reference my OS Giken install thread is here - LINK
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2021 Alfa Romeo Stelvio Quadrifoglio | 2.9L | Trofeo White Tri-Coat | 8-spd
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02-01-2023, 04:31 PM | #135 |
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Drives: 2011 M3/Porsche 992 GT3RS
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I run 295/30-18 RE-71RS which run a bit wider than even the A052 of the same size and am able to clear with 12mm spacer on 10.5 ET22. This is with strom uprights and no other after market control arms up front. I'm debating adding SPL stuff to the front to add more camber (not that the car needs it, just to clear my stock fenders)
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'06 BMW M3 ZCP 6MT | JRZ RS Pro + Hyperco 650/750 | Epic Tune | Brembo 355mm BBK | too many to list
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02-01-2023, 05:14 PM | #136 | |
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02-01-2023, 11:24 PM | #137 |
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Drives: 2011 M3/Porsche 992 GT3RS
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MCS 3 way
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'06 BMW M3 ZCP 6MT | JRZ RS Pro + Hyperco 650/750 | Epic Tune | Brembo 355mm BBK | too many to list
'11 BMW M3 ZCP DCT | Akra Evolution | Eventuri intake | MCS 3-way | 4.6L Carbahn S65 | Zebulon Aero | AP Racing Radi-CAL BBK by Essex | 305/645-18 Pirelli DHB Porsche 992 GT3, 991.2 GT3RS, 718 Spyder instagram.com/titomanlio |
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02-02-2023, 12:48 PM | #138 | |
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02-02-2023, 06:13 PM | #139 |
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Why does no one make inverted dampers like attached
The top plate is a simple design. The pillow ball sits in a separate race held in by allen screws. Easy design with a lot of flexibility. You can modify it for more castor/camber. The damper top nut sits flush to the plate and slides under the strut tower.
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04-11-2023, 11:54 PM | #140 |
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So ///mobbin and tlrid3r have installed the Strom uprights.
What were the end results with these? There seemed to be lots of talk about under steer being worse. Anyone looked into some billet rear upright to correct roll centre the same as these fronts?? |
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04-12-2023, 06:07 AM | #141 | |
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Confirming again the massive bump steer correction at my much lowered ride height. This was one of my main motivators in going for this part. Anecdotally I have also set PR’s at the two tracks I’ve visited, including COTA, but many many variables there. Maybe the point here is I don’t have any negative feedback yet, balance of the car was great on track. The next test for me is going to be tire wear. Just installed a new set of Cup 2’s on my drive to the track set but not a ton of track days on the calendar so may be awhile before I provide more thoughts. I have also considered a rear roll center correction kit and there is a company in Germany that makes one via solid offset bushings but as I feel balance is good I haven’t been motivated to make more changes. tlrid3r has this kit installed and may have more feedback.
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2021 Alfa Romeo Stelvio Quadrifoglio | 2.9L | Trofeo White Tri-Coat | 8-spd
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05-06-2023, 01:45 AM | #142 |
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I just ordered a Wisefab kit for the rear, well the drift kit is for the front, but they have a kinemtics revised grip kit for the rear. I believe the correction is for more than 20mm. If it works as they write, it would be the ultimate kit.
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05-06-2023, 09:44 AM | #143 | |
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link for anyone interesting in seeing the RCC rear
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Journal: Link E9x ZCP Suspension Info: Link Track Chat Discord: https://discord.gg/VsKbTyqBVj SF Bay Area: DM For coding services |
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05-12-2023, 10:54 PM | #146 |
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I have done front roll center correction with Strom uprights and rear roll center correction with MK offset bushing kit.
Car is balance and I believe it’s allowing me to use less spring and keep the car stable and happy even with mild aero. Car is neutral. No excess understeer like I experienced at first with just upright. I did increase more front caster, that was cherry on top. I’m very happy with handling. Now the driver skill is lacking.
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///M3... Don't want more power, Just want it to turn sharper one step closer each time. -Ohlins TTX Raceline, PolePostions seats, Akrapovic EVO, ARC-8, 1/2 Cage, Seat Delete, Stoptech BBK, solid Subframe and diff bushing, spherical bearing on everything.
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08-13-2023, 12:02 AM | #147 |
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Just read through this…I picked up a set of the strom uprights; I also have the spl arms; did anyone figure out the rubbing issue with 18” (e88) wheels?
I put everything together and when tested fitted the wheels, realized that the inner barrel is hitting the TR bolt (head). I am going to remove all the spacers tomorrow (except conical spacer) and try it again. Let me know if anyone figured out the setup with spl arms. Thanks.
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08-13-2023, 08:18 AM | #148 | ||||
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strom upright + spl TR + e88 fitment
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what was the solve for this combination (strom upright + spl TR + e88 fitment)?
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2015 M3 - GT4 replica Ongoing build thread https://f80.bimmerpost.com/forums/sh....php?t=1802471 For Pics / Video's visit Instagram https://www.instagram.com/ninekrpm1/ |
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09-06-2023, 10:37 PM | #149 |
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SOLD - SOLD - SOLD
If anyone is looking for a set, I have set for sale…never used. Reason for sale, these are not compatible with SPL arms…so have decided to revert to OEM knuckle + spl arms. $2750 + shipping (significant savings for a new set)
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09-14-2023, 04:11 PM | #151 |
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I would like to know who was the drunk who "invented" these knuckles.
Ninekrpm sell that garbage and buy m4 gts billet knuckles. With these knuckles you can use 513m rims 10.5" et46 without spacer, and 763m 11" et30 without spacer. These knuckles are authentic work of art of bmw. With gt4 ball joints it looks spectacular: On 18 rim: Last edited by Track/S; 09-14-2023 at 04:52 PM.. |
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09-14-2023, 05:13 PM | #152 | |
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Good choice in suspension |
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09-15-2023, 01:31 AM | #153 |
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09-15-2023, 04:35 AM | #154 | |
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For more than -3° of camber need some work on camber plates and adjustable arms. I did not measure the geometry changes. |
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