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Old 03-04-2007, 11:32 AM
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Help me with my Rearend setup (handling/ride quality)

This is going in my '36 Ford PU...for the front IFS, I'm going with the Heidts SuperRide2, the rear will be a straight axle...question is, for s Street truck concering ride quality and handling, is there any advantage to running a 4link with coil overs vs. parallel leafs?

I plan on turning this into my daily driver when done, so looking for the best ride/handling I can get...without going into IRS.

Thanks

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Old 03-04-2007, 11:41 AM
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There are many advantages to using coils/4 bars over leafs.
Greater ease of adjustability in spring rate and ride height, neutral anti dive/squat characteristics, better lateral movement control, no spring wrap upon hard launch, (sooner or later, yer gonna launch it. ) Better control of pinion angle.
And they look better.

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Old 03-04-2007, 02:46 PM
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Oh yeah...she'll get a launch or two

Thanks.
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Old 03-04-2007, 06:16 PM
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I have a 36 Ford PU with a Fat Mans stage III front end (coil overs) and Air Ride Technology Triangleated 4 bar with coil overs on the rear. I would not change a thing. I had leaf springs on it for 20 years and 207000 miles before rebuilding. It improved the launch, ride quality and cornering ability. I don't know of any other suspension I would rather have unless it would be an independent suspension and am not sure that would be an improvement.

Trees
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Old 03-05-2007, 05:00 AM
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For the street, I would recommend either a 3link, a triangulated 4link, or Art Morrison's 4BAR (NOT 4link). These minimize binding problems during cornering and the 3link and 4bar can be adjusted for optimum dragstrip performance. See adjustment tips at:

http://home.earthlink.net/~whshope
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Old 03-05-2007, 09:50 AM
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trees...great info and just what I wanted to hear!


Billy,



Could you give a brief explanation between the 4bar vs 4llink you mentioned? I didn't know there was a difference.

I'm going to go throug yoour site (again) to see if I can find the information.
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Old 03-05-2007, 11:32 AM
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Quote:
Originally Posted by LiftFlat
trees...great info and just what I wanted to hear!


Billy,



Could you give a brief explanation between the 4bar vs 4llink you mentioned? I didn't know there was a difference.

I'm going to go throug yoour site (again) to see if I can find the information.
I don't think I give much of a description there. With a 4link, the brackets are solid to the housing and frame and the links are adjustable within the multi-hole patterns available in the brackets.

With a 4bar, link pairs are located between two brackets which keep the bars parallel at all times. These brackets are then adjustable on hole patterns in another pair of brackets which are solid to the housing and frame. Since the bars in each link pair are always parallel, there can be no binding during cornering.

With a 4link, you achieve 100% anti-squat when the instant center falls anywhere on the no squat/no rise line. With a 4bar, 100% anti-squat occurs when the link pair is parallel to the no-squat/no rise line. (In other words, the tangent is equal to the center of gravity height divided by the wheelbase.)
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Old 03-05-2007, 11:58 AM
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Quote:
Originally Posted by LiftFlat
TI plan on turning this into my daily driver when done, so looking for the best ride/handling I can get...without going into IRS.
The responses above are on the money...and if you REALLY want to achieve a Cadillac Ride, make the top mount for the coil-over adjustable so you can alter the angle of the spring. Yes, you can control the ride somewhat by adjusting the coil over spring tension (height) but this also alters your ride height. By being able to adjust the spring angle AND the spring tension, you can dial in a near perfect ride to suit any driver while also maintaining the ride height you want.
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Old 03-05-2007, 12:43 PM
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Lot's of great information guys, I really appreciate it.
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