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Old 03-29-2003, 04:36 PM
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Post Dropped Axle

Can someone tell me what advantages or disadvantages there are for "four-link" and "hair pins" with a dropped axle? I can see where the four link would be easier to adjust, but like the look of the Hair pin. I am trying to decide which way to go on a Model T Touring.

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Old 03-29-2003, 06:06 PM
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a four link gives less bind and twist to the axle.
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Old 03-30-2003, 04:01 AM
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Arrow

As stated a four bar will work smoother, what wasn't said is that you can use a hairpin setup with an I-beam axle but you'll eventually break a tube axle with a hairpin because they won't twist like the I-beam.

[ March 30, 2003: Message edited by: woodz428 ]</p>
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Old 03-30-2003, 05:46 AM
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Also not yet stated is that the caster (the degree of angle) changes a lot less with a 4 Bar than with the hairpin. Most rod builders use the 5-7 degrees figure to set up the 4 Bar front ends. The 4 Bar setup is the most correct setup you can use with a straight axle (engineering wise). The 4 Bar is a parallelogram. The hairpin is considered better looking (by some).

If you have fenders.....the 4 Bar should be strongly considered. No fenders...... a hairpin setup does look best.




Also what has been said about the tube/I beam usage is TRUE. A tube will break with split wishbones/hairpins <img src="graemlins/sweat.gif" border="0" alt="[sweat]" />

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