Triangulater 4-link mounting options - Hot Rod Forum : Hotrodders Bulletin Board
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Old 01-17-2010, 06:13 PM
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Triangulated 4-link mounting options

Hey guy's, I've got a 70 nova that I am putting a triangulated 4 link in. I currently have a 12 bolt rear end that came out of an A-body. Now it has the factory mount on the pumpkin for the upper swing arms. The question that I have is, should I use those factory mounts or just weld new tabs to the axle housing? If I use the factory ones I can mount the uppers at a 45* and the arms will be longer. If I weld new tabs to the axle housings I can only mount them on a 30* and they are shorter. What do you think is a better option for me? I'm not to sure if it really matters.

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Old 01-18-2010, 07:20 PM
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anyone! bump
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Old 01-18-2010, 09:04 PM
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45 just seems more symmetrical to me,
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Old 01-18-2010, 10:40 PM
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I thought the same thing. I just don't know the technical end of things. Does it create more stress when at a 30*? I was just hoping someone could give me some of the technical information. I believe that all the factory setups that I have ever seen are set at a 45* and most of the after market kits recommend a 45* as well. What are the negatives to running them at a 30* instead of a 45*.
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Old 01-19-2010, 05:48 AM
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There may be something here: http://www.racetec.cc/shope/

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Old 01-19-2010, 06:00 AM
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IMHO, the 30 setup would be better for drag racing, the 45 would be better for turning. You want the upper links perpendicular to where the greatest forces will occur. That's why Pro Stock/Pro Mod cars run parallel 4 links with an extra diagonal link, and road racers will usually run the 45 uppers.
To me, the 30 setup is kinda halfway in between.
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Old 01-19-2010, 12:01 PM
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I like the top bars to be 45 degrees and the bottom ones almost straight. My lower bars run right below the frame rail.



I adapted a street rod TCI 4 bar setup to use coil springs ( I hate coil over shocks ). It rides pretty well and will hook up GREAT on most any surface ( but concrete works BEST ).

It is also easy to adjust the ride height

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Old 01-19-2010, 05:06 PM
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Deuce, very nicely done. Nice to see others take such pride in there craftmanship. Done a lot of research and have decided that a 45 would be best. Running them on a 30 creates around 42 percent more force laterally on the end links as compared to a 45. Been on biilyshope site running through the numbers and just trying to figure out what is the best mounting options for my car. Plan on building in plenty of adjustability so getting the geometry right shouldn't really be an issue. This site is a life saver, it has allowed me to do things that I never thought I could do before. Like figure out my own geometry.
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Old 01-20-2010, 08:36 PM
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Does this picture help you out?
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Old 01-20-2010, 10:21 PM
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Yes, thank you. Looks good!
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