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Old 06-21-2019, 09:09 PM   #1
norcalpb
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Camber bolts or crash bolts for max spring perch clearance?

Hi all,

I have a set of Apex ARC-8 Wheels that are 17x9 +42. With 0 camber and stock top hats, the tire is about 3mm from the lower spring perch

I am looking to add camber via bolts but I am not sure if I should get camber bolts or crash bolts.

From my understanding crash bolts move the entire hub closer to the strut via the top hole which could cause problems, but camber bolts push the lower part of the hub out via that lobe thing, which angles the hub.

Since camber bolts typically re-use the OEM upper 16mm bolt, would that mean that the hub would be further away form the strut than the crash bolts, and allow for more camber?

TIA
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Old 06-21-2019, 10:56 PM   #2
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Not exactly. You can use the lobbed bolt in the lower hole, but the pivot point of the hub on the shock body will be centered at the 16mm bolt. This means that even though you are pushing the hub away from the shock body at 14mm bolt location, the top of the wheel will still be angled inwards toward the spring perch (because of course it is, its neg. camber). Now it might give a tiny bit of extra room to work with, but it probably won't be anything worth relying on.

I'm in the same boat as you here, only with 17x8 +45 wheels. Tirerack recommends 3mm as the minimum clearance you should have between the tire and spring perch. I've got -.9 currently with about 8mm of clearance, which leaves me room for possibly up to -1.5, but that's the max without using spacers or getting new wheels. I love my OZ Legerra HLTs though, so...no.

I can see why you're also interested in those Pedders top hats. lol A quality set of top hats/camber plates really is the answer for you here I think, assuming you're like me and don't want to change your wheels...
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Old 06-22-2019, 08:19 AM   #3
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May i suggest also powerflex pff69-801g bushings then? They won't net much extra camber, i got some 0.8dg above maxed out camberbolt's range, but as they are on front control arm rear joint, they space it a bit out to get camber.
As for camber bolts .. there exist for both lower 14mm (SPC 81305) and upper 16mm holes (Whiteline KCA416)
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Old 06-22-2019, 12:01 PM   #4
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May i suggest also powerflex pff69-801g bushings then? They won't net much extra camber, i got some 0.8dg above maxed out camberbolt's range, but as they are on front control arm rear joint, they space it a bit out to get camber.
As for camber bolts .. there exist for both lower 14mm (SPC 81305) and upper 16mm holes (Whiteline KCA416)


I think the issue is less a matter of how to get more camber, and more a matter of how to get extra clearance for said camber.


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Old 06-22-2019, 12:13 PM   #5
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You have a few options... Spacers, different offset wheels, or coilovers will make the gap between your wheel and suspension larger: allowing you to add more camber.

Unless I'm missing something, with only 3mm of room, you will need to choose one of those options...
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Old 06-22-2019, 01:12 PM   #6
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Upper camber plates are you only option, unless you change something else.
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Old 06-22-2019, 04:26 PM   #7
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You have a few options... Spacers, different offset wheels, or coilovers will make the gap between your wheel and suspension larger: allowing you to add more camber.

Unless I'm missing something, with only 3mm of room, you will need to choose one of those options...
I have a set of RPF1s in 17x9 +35 that’ll fit everything I want to do but just such a shame about the ARC-8 fitment...I currently have STi spring/B6 Bilstein that’ll last me a while before they blow and I have to get a 60mm coilover kit.

I had also ordered 5mm spacers but saw afterwards they should really be used with aftermarket lugs so I returned them. I’m not sure 3mm spacers will give me my desired results so I may put these wheels up for sale
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Old 06-22-2019, 04:34 PM   #8
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Originally Posted by BlueWhelan View Post
Not exactly. You can use the lobbed bolt in the lower hole, but the pivot point of the hub on the shock body will be centered at the 16mm bolt. This means that even though you are pushing the hub away from the shock body at 14mm bolt location, the top of the wheel will still be angled inwards toward the spring perch (because of course it is, its neg. camber). Now it might give a tiny bit of extra room to work with, but it probably won't be anything worth relying on.

I'm in the same boat as you here, only with 17x8 +45 wheels. Tirerack recommends 3mm as the minimum clearance you should have between the tire and spring perch. I've got -.9 currently with about 8mm of clearance, which leaves me room for possibly up to -1.5, but that's the max without using spacers or getting new wheels. I love my OZ Legerra HLTs though, so...no.

I can see why you're also interested in those Pedders top hats. lol A quality set of top hats/camber plates really is the answer for you here I think, assuming you're like me and don't want to change your wheels...
I think I知 going to do SPC camber bolts in the lower hole, and if I can稚 get any camber due to clearance issues I値l use the bolts to simply even out camber.

As you can see by this pic, I値l take any of the negative camber I can get lol.

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Old 06-22-2019, 04:37 PM   #9
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Upper camber plates are you only option, unless you change something else.
I originally had some HVT camber plates but they were a little rough for my DD needs. I ordered Pedders angled rubber top hats hoping I can get at least .7 degrees + whatever natural camber there could possibly be from a 15mm drop.
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Old 06-22-2019, 04:45 PM   #10
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Quote:
Originally Posted by norcalpb View Post
I think I知 going to do SPC camber bolts in the lower hole, and if I can稚 get any camber due to clearance issues I値l use the bolts to simply even out camber.

As you can see by this pic, I値l take any of the negative camber I can get lol.

Adding negative camber will worsen the issue not matter where you stick the crash/camber bolt. Your only choice is coilovers, spacers, not run those wheels, or take some negative camber away.
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Old 06-22-2019, 07:40 PM   #11
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Originally Posted by norcalpb View Post
I have a set of RPF1s in 17x9 +35 that値l fit everything I want to do but just such a shame about the ARC-8 fitment...I currently have STi spring/B6 Bilstein that値l last me a while before they blow and I have to get a 60mm coilover kit.

I had also ordered 5mm spacers but saw afterwards they should really be used with aftermarket lugs so I returned them. I知 not sure 3mm spacers will give me my desired results so I may put these wheels up for sale
As an aside, how are you liking the STi/Bilstein setup? I'm eyeing that setup if something happens to my PP Sachs.
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Old 06-22-2019, 09:10 PM   #12
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As an aside, how are you liking the STi/Bilstein setup? I'm eyeing that setup if something happens to my PP Sachs.
I’m loving it. My car is primarily a DD so I wanted road clearance for my awful local roads but still be lower than stock. I combined this setup with shorter bump stops to make my suspension travel essentially stock. I feel like the sti springs (mine are JDM) pair with the full length B6 struts/shocks very nicely because of its minimal 10-15mm drop. Very comfy, and I can actually go fast on a warped canyon road.

However they are progressive and on the softer side (about 175#f, 225#r). To take advantage of my 200tw tires I bought the 2017+ rear sway bar and a Perrin 19mm front bar. This feels very similar to my old RCE springs minus the squat and dip present with this current setup.

I still think I could run faster times with stiffer overall spring rates at the track, but I am 99% DD. In the future I will most likely go with RCE SS1 coilovers to avoid these fitment issues, hopefully keep a soft DD ride, while significantly reducing body roll.
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Old 06-24-2019, 12:42 PM   #13
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You can try having both camber bolts on the top and bottom slots and adding the powerflex lower front arm camber bushing to get more camber and still have a bit space from the spring perch. IIRC a one guy on the forum was able to reach -3 camber with that setup on stock coilovers and I think he tracks as well

The consensus is not to run 2 camber bolts but I have not had it snap or slip. I personally run two camber bolts in my fronts for over 10k miles as DD with spirited runs here and there. Just got new tires and did an alignment and was able to achieve -2.5 on both sides. IIRC, at one point, I was able to achieve near -3 camber with those two bolts.

Edit: it was actually @churchx (user from above) who has the setup I mentioned.
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Old 06-24-2019, 01:58 PM   #14
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You can try having both camber bolts on the top and bottom slots and adding the powerflex lower front arm camber bushing to get more camber and still have a bit space from the spring perch. IIRC a one guy on the forum was able to reach -3 camber with that setup on stock coilovers and I think he tracks as well

The consensus is not to run 2 camber bolts but I have not had it snap or slip. I personally run two camber bolts in my fronts for over 10k miles as DD with spirited runs here and there. Just got new tires and did an alignment and was able to achieve -2.5 on both sides. IIRC, at one point, I was able to achieve near -3 camber with those two bolts.

Edit: it was actually @churchx (user from above) who has the setup I mentioned.
The power flex seems like a good idea but on the expensive and 菟ermanent side. I知 going to look into how much a bushing tool is to see if I can minimize installation costs.

And yes just one eccentric bolt for me. 2 may be safe, but that値l be for another time if necessary.
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