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Old 03-08-2008, 09:57 AM
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Corvette C4 IRS Suspension Geometry?

Does anyone have any links for the factory C4 IRS suspension geometry?

It would be greatly appreciated.

I know I can get a shop manual. I was just hoping there was a suspension (how-to) for the C4 out there somewhere.

Dave

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Old 05-15-2008, 02:21 PM
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I have fabricated the rear frame section for my 50 Merc to use a C4 IRS and I have installed a kit from Flat-Out Engineering to use a C4 IRS on my 56 F100. What specific geometry were you looking for? I have some Visio drawings that I worked up for both the IFS and the IRS if you need them.
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Old 05-15-2008, 05:43 PM
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Quote:
Originally Posted by CharlieLed
I have fabricated the rear frame section for my 50 Merc to use a C4 IRS and I have installed a kit from Flat-Out Engineering to use a C4 IRS on my 56 F100. What specific geometry were you looking for? I have some Visio drawings that I worked up for both the IFS and the IRS if you need them.
I appreciate it. I got the information I was needing from a thread I made later. I was told 3-4 degrees for the propeller shafts, and I "think" he said dog bone front braket set at a 60 degree angle from 90. Off the top of my head I can't remember exactly what he said....but I made a copy and have it in my build folder at work. Do those angles sound right? I'd appreciate those drawings. They might help as I still have to cut and modify my frame. I have a good idea of what to do now....but any thoughts would be appreciated.

Thanks,
Dave
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Old 05-10-2014, 08:26 PM
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Found your post through a search function. I'm looking for a dimension of spindle pin height to the cradle at ride height, to use when calculating wher to put cradle in my 56 chev passenger car frame.

Do you still have drawings available?
Thanks of you can.
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Old 05-12-2014, 06:40 PM
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1984 to 87 C4 measured drawing

I recently posted to 1929fordhotrod.com a complete set of measured drawings using the C4 suspension on a custom chassis for a 1928 to 31 Model A frame. You can easily adapted these drawing to other builds.

Last edited by 1929fordhotrod; 05-12-2014 at 06:41 PM. Reason: typo error
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