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 Post subject: 4 link?
 Post Posted: Sat Feb 21, 2009 9:12 pm 
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Location: N.J.
If I measure it out on the floor where do I get the length from?? Lower bar or top bar???

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 Post subject: Re: 4 link?
 Post Posted: Sat Feb 21, 2009 10:13 pm 
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Length of...? Intersection point?


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 Post subject: Re: 4 link?
 Post Posted: Sat Feb 21, 2009 10:45 pm 
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I mapped out the 4 link width and how far apart the bars are and I am just trying to figure where to measure the length of the intersecting point to see it it's close to the 4 link program I am using........

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 Post subject: Re: 4 link?
 Post Posted: Sun Feb 22, 2009 12:09 am 
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Set it on the ground and line it up, run strings on top. Programs are math based and should be accurate.


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 Post subject: Re: 4 link?
 Post Posted: Sun Feb 22, 2009 1:01 am 
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Beretta wrote:
If I measure it out on the floor where do I get the length from?? Lower bar or top bar???

If I am understanding the question correctly, the IC is normally measured from a vertical line even with the axle centerline forward to the IC and how far above or below the ground/floor.

If you measured the hole locations correctly for the chassis/4-link program you are using it is fairly simple geometry to calculate the IC. Like Mark said, the program should be right on if the numbers given were correct. But if you are laying them out on the floor based on those same measurements, they should be closer than you can measure.

Rick


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 Post subject: Re: 4 link?
 Post Posted: Sun Feb 22, 2009 11:02 am 
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Location: Clawson, Mi.
Barry,

I had a guy help me and he had the program, and I had the chassis, but I just put my chassis up on my 12 inch blocks race ready, and measured from all my link bar bolts to the ground, front, and rear, and top and bottom and sent the info to him and he gave me my I/C length and we just subtracted the 12 inch block dimensions and BINGO!!!!! =; =; Is this what your looking for????

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 Post subject: Re: 4 link?
 Post Posted: Sun Feb 22, 2009 11:16 pm 
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Wheel base and pinion angle are set off the two left bars and the right lower, any adjustment to pre load is the right uppers job. Use blocks or jack stands to level and so you can get under and don't forget to place drivers weight in seat and disconnect anti roll bar and add for jack stands. If it was designed well, you should be able to move any one bar to any forward location with less than a couple turns and bot change wheelbase if done separately after any preload is removed. The rear location holes most times require changing length some, but if done one at a time like above, the wheek base should remain the same.

When measuring and drawing, it's just like shooting. Aim small, miss small.

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 Post subject: Re: 4 link?
 Post Posted: Tue Mar 10, 2009 7:49 am 
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Just get out the tape measure, measure the vertical locations of the rear holes, the distance forward...from the rear axle centerline...to those same rear holes, the vertical distances to the front holes, and the lengths of both upper and lower links. Then, go to the free spreadsheet on Page 13 of my site.
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