4 Link Setup

[grumper]

I have been thinking about a 4-link setup for my RPU. I wanted to run my thoughts past the group to see if anyone can see any glaring issues. I've attached a rough illustration of what is lingering in my gray matter. Am I okay with attaching the bars to the kick-up of my frame? I haven't put together any measurements yet, this is the first step, but I wanted to make sure it was kosher before working out sizes.

http://www.roddersatlas.com/images/4link.jpg

[tinmann]

Unless your blueprint is updated with more mounting holes to give your bars far more adjustability, then what you're really talking about is a "4 bar" set-up not a "4 link" set-up. Totally different animal.

[grumper]

You're right Tinmann, my bad. I meant 4 bar.

[dale48mrc]

Just my 2 cents here,but wouldn't the bars be awfully short?I'm thinking binding issues.What kinda four bar are you thinking of,parallell or triangulated?

[grumper]

It's the binding that I'm curious about. I'm thinking of parallel bars but I'm wondering what the ideal length of the bars would be.

[ss34coupe]

I agree, you frame setup might make it difficult to hve proper length four bars, maybe a triangulated system is the way to go - where the top bars go from the centre of the rearend off to the side of the frame. Look at the online catalogs of some rod parts companies for ideas.

[tinmann]

I've measured a few 4 bar set-ups and it seems like most rear bars fall into the 32" to 34" length variety. Top and bottom bars being the same length. Unless you are considering triangulated 4 bar, in which case the top bars are typically shorter. With triangulated, you won't need a panhard.

[HotRodPete]

Might be worth a look

http://cgi.ebay.com/ebaymotors/06-Drag-Race-4-Link-Suspension-Plans-GASSER-HOT-ROD_W0QQcmdZViewItemQQcategoryZ10076QQihZ021QQitem Z310051098800QQrdZ1QQsspagenameZWDVW

He has other plans

Pete

[1Bad56]

check out July 2008 Street Rodder mag on pages 192 and 200. Both 4-bar set ups are similar to what your are thinking about on an extreme Z'd chassis. One uses a long panhard bar and the other one uses friction shocks with some pretty fancy bracketery to keep the rar in place.

[grumper]

Thanks I'll keep my eye open for that mag.

grumper