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BC Coils inner clearance and camber
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06-10-2014, 03:17 PM | #1 |
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BC Coils inner clearance and camber
I have 2 questions
1. I'm planning on getting a new set of wheels and some BC coils soon, but I'm a little concerned about the wheel clearing the coil since the coils look a little wider than the stock strut. Can someone that has these measure the clearance between the strut and the wheel and also post your wheel specs. My front wheels will probably be 19x9.5 et27, but I can change the offset if I need to clear the coilover. 2. How much fender clearance will I gain from camber? I think stock is around -.75 degrees and I want to have -1.5 degrees of camber up front. So how much will the top of the wheel move in with the extra -.75 degrees of camber? |
06-10-2014, 10:48 PM | #2 |
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The issue on clearance when you got to coilovers normally comes from the factory strut/shock flares out at the mount so normally have no issues with clearance. Most coilovers use a threaded housing to raise and lower which puts the coil spring in contact with the tire in some cases.
What offset wheels are planned? |
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06-11-2014, 11:23 AM | #3 | |
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9.5et27 245/35/19 11et36 275/30/19 Last edited by bmw325i; 06-11-2014 at 11:28 AM.. |
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06-11-2014, 10:32 PM | #5 |
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I can pick the offsets so I am trying to avoid the spacer. I can go down to 9.5 et25 or 26, but I want to know how much camber I would need to get 5mm more clearance. I am trying to get the wheels perfectly flush.
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06-12-2014, 12:59 AM | #7 |
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06-12-2014, 02:31 AM | #8 |
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It's kinda difficult to get exact measurement, but i have no more than 9mm gap to my BC BR Racing shocks with 18x9.5 et22 and 225/40/18. According to @#Tee: Each degree of camber will pull the rim in 10-12mm.
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Last edited by MonacoBlueE90; 06-12-2014 at 02:43 AM.. |
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06-12-2014, 03:56 AM | #9 |
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06-12-2014, 07:08 AM | #10 | |
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10-12mm is more than I expected with 1 degree of camber. If that's true it would be pretty easy to fit 9.5et22 without poking. |
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06-12-2014, 07:09 AM | #11 |
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06-12-2014, 07:51 AM | #12 | ||
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This is what member #Tee said to me when i asked it some time ago. I don't really have idea about that. Direct quote of what he said back then, Quote:
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06-12-2014, 08:18 AM | #13 |
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sorry late on this guys, youll be perfectly fine with the 9.5 +27. theres plenty of inside gap...the bc body flares out at the body about 3mm (more than other coils). so at those specs theres at least 3mm gap.
youll be poking 4mm with the -.65 so adding another .75 youll be tucking at least 5mm. at this point you can just use the camber to control the poke but maximum poke would be 4mm (top of fender to rim). just be careful on the drive height cause the front stretch is very minimal. youre really pushing the limits of being functional flush with some meat on the tires + aesthetically pleasing flush/poke.
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06-12-2014, 09:27 AM | #14 | |
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Thank You Edit- how much camber do you think is needed for 9.5et22 to be flush with the fender. |
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06-12-2014, 09:31 AM | #15 | |
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06-12-2014, 09:40 AM | #16 | |
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heres a 9.5 +22 225.35 10 +25 255.30 natural camber all around. on springs iirc..not sure if this reference helps any...i didnt take the pix.
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06-12-2014, 09:48 AM | #17 |
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It seems like all the pictures I see with et22 poke even with camber |
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06-12-2014, 10:03 AM | #18 |
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oh if youre on an e90 youre safe, ya its just the angle of the shots the front bumper curves down and in alot so the poke is exaggerated. the 245.35 is a very minimal. try this formula ...i posted this a few times
you can imagin a stretch ratio use reference above 225x.35 = 78.75/9.5 = 8.2 ratio lower the ratio more stretch angle 255x.3 = 76.5/10 = 7.65 rato you can clearly see the difference with the stretch between 8.2 vs 7.65 above now just plug in your numbers 245x.35=85.75/9.5 = 9.0 pending on the tire brand ratio around 9 and up it will start to square up... so the stretch is VERY minimal. 275x.3=82.5/11 = 7.5 so just by looking at the 7.5 and the 9 i know the stretch will not look the same once mounted. if this is a concern to you...then you can change it up for aesthetic reasons. if not just run it as is.
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06-12-2014, 10:24 AM | #19 | |
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Monacobluee90 do you have some pictures of 9.5et22 up front? |
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06-12-2014, 12:45 PM | #20 |
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Yeah only these two currently, tho. Camber is -1 degrees.
By the way 19x9.5 et25 with 245/35/19 http://www.e90post.com/forums/showthread.php?t=877645
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06-12-2014, 03:50 PM | #21 | |
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06-12-2014, 03:58 PM | #22 | |
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I did this by drawing a triangle and using the angles to calculate the length of each side and based on this 1 degree of camber pushed the top of the triangle out about 5.33mm. |
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