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home made coil over conversion

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Old 10-26-2009, 07:36 PM
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67fastbak
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Default home made coil over conversion build up

i have a 67 fastback and i want a better race style coilover conversion thats better then stock or mild aftermarket replacement parts and i want it to be on a budget. so i decided i would build my own since i already build a-arm off road race cars with 20 inch plus inches of travel i figured this wouldnt be to hard. it will be a conversion where the coil overs mount on the lower control arm not on the upper and the arms and struts will be made out of round chromolly tubing and use chomolly heim joints with screw in ball joints with sleeves. the coil overs will be QA1 single adjustable with 450 pound springs. i just wanted to let people see and know what your opinions on the project are.

in the pics are the parts that i have so far im still waiting on the heims and coilovers to come im but i m planning or starting to build the control arms tomorrow.
Attached Thumbnails home made coil over conversion-img_0051.jpg   home made coil over conversion-img_0050.jpg   home made coil over conversion-img_0049.jpg  

Last edited by 67fastbak; 10-28-2009 at 08:54 PM.
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Old 10-26-2009, 08:05 PM
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jasond393
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I know you are not done yet, but when you are would you make a list of what all is needed? Thanks
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Old 10-26-2009, 08:32 PM
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Nick.Simonds
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Originally Posted by 67fastbak
450 pound springs
Maybe it is different with coil overs or something, but aren't 450 a little soft?
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Old 10-26-2009, 08:35 PM
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cprstreetmachines
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Not exactly, the leverage is applied different with this type of mounting point. The 450 is about a 650-700 lb spring in the stock location.

What ever you do, if you haven't bought them already skip the QA1's. They probably be leaking before you get them.
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Old 10-26-2009, 08:39 PM
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Nick.Simonds
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Originally Posted by cprstreetmachines
Not exactly, the leverage is applied different with this type of mounting point. The 450 is about a 650-700 lb spring in the stock location.

What ever you do, if you haven't bought them already skip the QA1's. They probably be leaking before you get them.
Interesting, learn something new ever day.
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Old 10-26-2009, 08:59 PM
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67fastbak
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yes i alredy ordered the qa1s i was under the impression that they were alright since most of these types of conversions use them but if they leak ill rebuild them and use better seals.

and yes coil overs use lighter springs mostly due to the different angle that they are mounted at. there is a formula for finding the rate due to the angle that theyre mounted
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Old 10-27-2009, 06:54 PM
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67fastbak
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made some progress on the lower arms today. i just made a simple jig to make sure theyre straight and even
Attached Thumbnails home made coil over conversion-img_0053.jpg   home made coil over conversion-img_0054.jpg   home made coil over conversion-img_0055.jpg   home made coil over conversion-img_0057.jpg  
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Old 10-27-2009, 06:57 PM
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67fastbak
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and a few more pics
Attached Thumbnails home made coil over conversion-img_0058.jpg   home made coil over conversion-img_0059.jpg  
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Old 10-27-2009, 09:28 PM
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Scott H.
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.....

Last edited by Scott H.; 01-23-2010 at 11:01 PM.
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Old 10-27-2009, 09:39 PM
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67fastbak
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no i have a smallblock. what do you mean by setback of the coilover? :/
and i am going to build my own camber kit but its not going to be adjustable it will be a square with a hole directly in the center and then ill use the hein joints to adjust the camber
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