Help SPC Front Camber Kit Rattle
"We sent 2 sets of G35 arms to a couple of guys. They both installed them but I don't have final alignment readings yet to complete the fit up analysis.
One used Eibach springs and the other was coilovers. So we should have decent representation for the different styles.
Initial feedback from the Eibach user was that unless he hit really hard, ie going too fast over a bump, he was not getting interference.
The other piece of knowledge users will have to understand is that with a lowered vehicle eventually something has to bottom out. The intended
stop mechanism is the bump stop or bump stop washer. We did start to supply washers with all kits leaving the factory.
One last item to clarify. One of the users said the arms were holding up the ride height of the car. That's not possible unless the arms are installed improperly, which was the case. You cannot tighten the bushings with the arms hanging down. This preloads the bushing and under this condition the arms can hold up the car.
The arm bushings need to be tightened at their estimated final ride height location. Once this was clarified to the user, he readjusted the arms and bushings and the car ride height sat where expected. This is covered in the installation instructions but is easy to overlook.
I'll pass on more as soon as I know
Jeff"
Registered User
Joined: Dec 2008
Posts: 553
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From: Toronto
Hey Andy, I know things are still up in the air with SPC, but how long can I safely hold on to the front arms and be reassured that I can still get a refund from you or a replacement at least for the G35 arms if that ends up being the fix?
Update:
2 nights ago, I installed bumpstops onto my passenger side BC Coilovers.
Here is a quote from the email I sent to Jeff@SPC detailing how I came up with the amount required. Also attached is a picture of showing the number needed.
2 nights ago, I installed bumpstops onto my passenger side BC Coilovers.
Here is a quote from the email I sent to Jeff@SPC detailing how I came up with the amount required. Also attached is a picture of showing the number needed.
Jeff,
This may come as a surprise, but I found that 13, yes, 13 urethane washers were needed for the passenger side strut. I’ll explain how I came to this conclusion.
When I had the G37 arms on, I installed 4 washers on the driver side. I thought this was enough to mitigate contact, though I may have been wrong. After installing these, I jacked up the passenger side and slid the BC bump stop far down the shock tube. When I received the G35 arms, I installed them, then drove the car over a week and over 1200 miles, hitting metal to metal a few times. Last night, I tore down the passenger side suspension, removed the spring, and found the BC bump stop traveled up the shock tube, but was short of the metal sop by a good 2”. I grabbed a stack of washers and started loosely fitting them up. 12 washers fit just fine, but I was able to wedge 1 more washer in to make it really tight <see photo at end of email>. Then I went ahead and installed all 13 washers in a permanent fashion.
I feel confident that this amount of washers will end the frustration with hitting metal to metal. I will say that this most likely has more to do with BC Racing using poor R&D practices to find a better bump stop size for the G37 application. Granted, washers would be necessary due to the height increase that SPC imposed on the arms, but no more than about an inch worth. This, unfortunately, will likely only be applicable to those – like myself – who have BC Coilovers as their suspension. Other coilovers may have longer bump stops and might require fewer washers. Fortunately, I have enough washers to install 9 more on my driver side.
This may come as a surprise, but I found that 13, yes, 13 urethane washers were needed for the passenger side strut. I’ll explain how I came to this conclusion.
When I had the G37 arms on, I installed 4 washers on the driver side. I thought this was enough to mitigate contact, though I may have been wrong. After installing these, I jacked up the passenger side and slid the BC bump stop far down the shock tube. When I received the G35 arms, I installed them, then drove the car over a week and over 1200 miles, hitting metal to metal a few times. Last night, I tore down the passenger side suspension, removed the spring, and found the BC bump stop traveled up the shock tube, but was short of the metal sop by a good 2”. I grabbed a stack of washers and started loosely fitting them up. 12 washers fit just fine, but I was able to wedge 1 more washer in to make it really tight <see photo at end of email>. Then I went ahead and installed all 13 washers in a permanent fashion.
I feel confident that this amount of washers will end the frustration with hitting metal to metal. I will say that this most likely has more to do with BC Racing using poor R&D practices to find a better bump stop size for the G37 application. Granted, washers would be necessary due to the height increase that SPC imposed on the arms, but no more than about an inch worth. This, unfortunately, will likely only be applicable to those – like myself – who have BC Coilovers as their suspension. Other coilovers may have longer bump stops and might require fewer washers. Fortunately, I have enough washers to install 9 more on my driver side.
Registered User
Joined: Oct 2007
Posts: 1,381
Likes: 2
From: Ponte Vedra, FL
13?!? Good god. There has to be a better product. We need an official position by SPC on what they're going to do.
I'd be willing to bet that someone with some KWv3's would find that they may only need 4 or 5 washers to achieve the same thing...
I think you missed a key part of Finagle69's post that said: "I will say that this most likely has more to do with BC Racing using poor R&D practices to find a better bump stop size for the G37 application."
Neither of us with the arms have gotten official alignments yet to determine the full + and - range. We are working on getting that done. However, I estimated per post #105 that the + range with G35 arm in G37 with -0.5 caster was about +1.3deg adjustment maybe a little more. Again, official alignments pending.
Registered User
Joined: Oct 2007
Posts: 1,381
Likes: 2
From: Ponte Vedra, FL
Neither of us with the arms have gotten official alignments yet to determine the full + and - range. We are working on getting that done. However, I estimated per post #105 that the + range with G35 arm in G37 with -0.5 caster was about +1.3deg adjustment maybe a little more. Again, official alignments pending.
Not sure how you figure that.
Per the information I posted in #105, if you are at -2.0 on Eibach Prokits then you can get to about -0.7 [-2.0 + 1.3 = -0.7]. Spec front camber is a range of -1.17 min, -0.42 nominal, +0.33 max.
Now I am on Eibach Prokit and was able to set them at about the nominal camber setting since I was at -1.7 and -1.3 on the front L&R before the arms. So I was able to get both fronts to about -0.4.
Hope that helps clarify.
Personally, I think the G35 arm works great with the Eibach Prokits and is a completely acceptable solution.
And I don't care who designs the arms, sooner or later you are going to have to run bumpstops on way low coilovers as there is only so much room before the fender is the limiting factor.
Per the information I posted in #105, if you are at -2.0 on Eibach Prokits then you can get to about -0.7 [-2.0 + 1.3 = -0.7]. Spec front camber is a range of -1.17 min, -0.42 nominal, +0.33 max.
Now I am on Eibach Prokit and was able to set them at about the nominal camber setting since I was at -1.7 and -1.3 on the front L&R before the arms. So I was able to get both fronts to about -0.4.
Hope that helps clarify.
Personally, I think the G35 arm works great with the Eibach Prokits and is a completely acceptable solution.
And I don't care who designs the arms, sooner or later you are going to have to run bumpstops on way low coilovers as there is only so much room before the fender is the limiting factor.
Registered User
Joined: Oct 2007
Posts: 1,381
Likes: 2
From: Ponte Vedra, FL
Not sure how you figure that.
Per the information I posted in #105, if you are at -2.0 on Eibach Prokits then you can get to about -0.7 [-2.0 + 1.3 = -0.7]. Spec front camber is a range of -1.17 min, -0.42 nominal, +0.33 max.
Now I am on Eibach Prokit and was able to set them at about the nominal camber setting since I was at -1.7 and -1.3 on the front L&R before the arms. So I was able to get both fronts to about -0.4.
Hope that helps clarify.
Personally, I think the G35 arm works great with the Eibach Prokits and is a completely acceptable solution.
And I don't care who designs the arms, sooner or later you are going to have to run bumpstops on way low coilovers as there is only so much room before the fender is the limiting factor.
Per the information I posted in #105, if you are at -2.0 on Eibach Prokits then you can get to about -0.7 [-2.0 + 1.3 = -0.7]. Spec front camber is a range of -1.17 min, -0.42 nominal, +0.33 max.
Now I am on Eibach Prokit and was able to set them at about the nominal camber setting since I was at -1.7 and -1.3 on the front L&R before the arms. So I was able to get both fronts to about -0.4.
Hope that helps clarify.
Personally, I think the G35 arm works great with the Eibach Prokits and is a completely acceptable solution.
And I don't care who designs the arms, sooner or later you are going to have to run bumpstops on way low coilovers as there is only so much room before the fender is the limiting factor.
Last edited by JLai; Apr 19, 2009 at 03:31 PM.
Registered User
Joined: Mar 2009
Posts: 86
Likes: 0
From: Orlando, Fl
Not sure how you figure that.
Per the information I posted in #105, if you are at -2.0 on Eibach Prokits then you can get to about -0.7 [-2.0 + 1.3 = -0.7]. Spec front camber is a range of -1.17 min, -0.42 nominal, +0.33 max.
Now I am on Eibach Prokit and was able to set them at about the nominal camber setting since I was at -1.7 and -1.3 on the front L&R before the arms. So I was able to get both fronts to about -0.4.
Hope that helps clarify.
Personally, I think the G35 arm works great with the Eibach Prokits and is a completely acceptable solution.
And I don't care who designs the arms, sooner or later you are going to have to run bumpstops on way low coilovers as there is only so much room before the fender is the limiting factor.
Per the information I posted in #105, if you are at -2.0 on Eibach Prokits then you can get to about -0.7 [-2.0 + 1.3 = -0.7]. Spec front camber is a range of -1.17 min, -0.42 nominal, +0.33 max.
Now I am on Eibach Prokit and was able to set them at about the nominal camber setting since I was at -1.7 and -1.3 on the front L&R before the arms. So I was able to get both fronts to about -0.4.
Hope that helps clarify.
Personally, I think the G35 arm works great with the Eibach Prokits and is a completely acceptable solution.
And I don't care who designs the arms, sooner or later you are going to have to run bumpstops on way low coilovers as there is only so much room before the fender is the limiting factor.