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  #1  
Old Oct 27th, 09, 3:44 PM
BB_Mike BB_Mike is online now
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Question SPC upper arms: travel limit downard?

What are some of you doing to limit the downward travel of the SPC arms seeing as how they don't use the stock upper control arm bump stop?


I guess most are relying on gravity but my application will most likely lift the front wheels off the ground. If it doesn't, then I've failed miserably.

SC&C, I think, recomends the Competition Engineering kit seen here:
http://www.competitionengineering.co...onents_368.pdf

I wonder if I can skip the welding part and use the orginal bump stop hole in some way? Maybe tie it down into the sway bar hold on the lower control arm? the link above looks like something I can make from a hardware store. I don't need the adjustability though becuase I am not going to limit my travel down to low numbers like the drag cars like. I just want to keep the upper arm from slamming into the frame is all.
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Old Oct 27th, 09, 4:05 PM
stealth71 stealth71 is offline
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Default Re: SPC upper arms: travel limit downard?

Best bet is to add limiting straps from the drag world (what you posted a link to). This has been my plan just haven't needed to implement it yet. Was planning on tackling it with the nitrous install.
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Old Oct 27th, 09, 4:25 PM
bochnak bochnak is offline
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Default Re: SPC upper arms: travel limit downard?

Mark recommended these to me at some point:

http://www.mastercraftsafety.com/limitstraps.php

I won't worry about it with my weak engine.
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Old Oct 27th, 09, 4:49 PM
camcojb camcojb is offline
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Default Re: SPC upper arms: travel limit downard?

I just used short rubber stops and a flat plate under the ball joint.



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Last edited by camcojb; Oct 27th, 09 at 5:18 PM.
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Old Oct 27th, 09, 5:23 PM
BB_Mike BB_Mike is online now
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Default Re: SPC upper arms: travel limit downard?

Good idea on the added plate. I have the screw in upper BJ, so I don't have that as a noticable option, but it's an idea I wont dismiss.

Thank you for the limit straps link. I knew I'd heard/read about a flat strap somewhere, I just didn't think to plug the words "strap" into my google searching.

My next question would be about how much travel there is.

Camcojb, is that with the car's weight sitting on the wheels?
Would you guess that makes for about 3" of downward travel?
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Click here for pictures of my 72 convertible and 71 chevelle.

72' 3820# convertible
BB402, Merlin heads, TH350, 3.23 posi 1/8th mile: 8.6 @86mph

71' coupe project:
goal: 150+MPH, 9s driven to and from track, 10" tire, 1000+HP
Build: 540cid, twin turbo, 4L80e, .... more to come....

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Old Oct 27th, 09, 6:10 PM
The WidowMaker The WidowMaker is offline
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Default Re: SPC upper arms: travel limit downard?

on my 70 the front of the upper arm hits the frame. i have some thin ~2" dia poly mounts that are going on the frame. im not worried about it while racing though, only for jacking the front end up.
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