Four Link Suspension - Drag car

• Jun 15, 2004

• #2

red300zx99x

Automotive

May 20, 2004

55

US

I'd run simulations with varing IC's and choose the IC that had the highest average rear wheel load over say the first 60ft or so, or however long you have traction problems. But their are probably other ways

 

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• Jun 15, 2004

• #3

patprimmer

New member

Nov 1, 2002

13,816

US

How do you intend to 167 mph with 5.8 gears.

What is your rolling dia of the tyre.

What RPM are you using.

Is the trans auto or manual.

What is your top gear ratio.

We run about 170mph at over 8000 rpm with 33"tyres and 4.3 diff, and a powerglide.

I can't help with the 4 link as we run ladder bars and set them up about parallel with the ground.

Regards
pat pprimmer@acay.com.au
eng-tips, by professional engineers for professional engineers
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• Jun 17, 2004

• Thread starter
• #4

podo

Electrical

Jun 1, 2004

7

US

To red300zx99x;
You described what I think I need - a good simulation package. Do you know of any, and how do I obtain one?
Thanx,
podo

 

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• Jun 18, 2004

• #5

red300zx99x

Automotive

May 20, 2004

55

US

Check the forum faqs

 

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• Jun 20, 2004

• #6

BillyShope

Automotive

Sep 5, 2003

263

US

A simple...yet very effective...setup is to keep each link pair parallel (i.e., upper link parallel to lower link), but angled up, from the rear, at an angle with a tangent equal to 17/105 = 0.162 (or 9.2 degrees). This will yield no squat or rise and, at the same time, will not give you any binding problems while cornering. (I'm assuming the links are in the normal "straight ahead" drag race configuration.)

If you wish to cancel out the driveshaft torque (and, of course, you do), add 5 degrees to the right side pair and subtract 5 degrees from the left side. This will get you very close and provide the best 60 foot times.

 

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