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z65mm6
04-02-2006, 09:53 AM
Need some help with a project.
Reading some of the recent threads piqued my interest, but I didn't want to hijack someone elses thread.
this started out as a MII that was widened by 4" between the control arm mounting points
I narrowed the LCA mounting points by 4 "(stock MII width)
The UCA mounting points I lowered by 1"
The LCA's were lengthened by 4" and measure 17.25"
The UCA's were lengthened by 2" and measure 9.9"
this is the resulthttp://us.a1.yahoofs.com/users/432b967ez9cfe3c9/2f24/__sr_/7ec3.jpg?phA4AMEBLUJGikT2

the above was generated assuming a roll of .8 degrees
the arms were lengthened to help with scrub radius (-1.20")
I'm wanting to run a 26" tall tire on an 8" wide rim.
I'm thinking of an offset somewhere around 50mm.
Overall this should increase the height by about 2 inches over what I think ford originally intended.

The roll center seems high but I'm wanting to run a 406 FE. that coupled with the taller body of a truck I'm guestimating a COG of 30" so I'm hoping that will work to my advantage.

Where might I go with this, what else might I think of changing. This isn't intended to be a corner burner by any means, the closest it might get to the track is a support vehicle.

From where it sits now the rack will have to be somewhere around 7.5" wider than the stock MII rack to accomodate the mentioned changes.

Another avenue I was thinking of was leaving the UCA's and mount alone and just narrowing the lower mount and increasing the length of the LCA's but I think that would have negligible effect on geometry.

Thanks for your help

sinned
04-02-2006, 01:02 PM
Your page is unavailable, possible bad link.

Always do your roll analysis at 2.00* roll, -.50* of steer and .25 bump. This is a real world worst case trail braking corner. Simply .80* of roll is a fast lane change, no real challenge to the suspension being encountered.

z65mm6
04-02-2006, 02:00 PM
Well lets try this again
https://static1.pt-content.com/images/noimg.gif

okay revised to show 2.00* roll, -.50* of steer and .25 bump
tried a different server hopefully this one will work.

Thanks Denny

sinned
04-02-2006, 04:16 PM
Your link still doesn't work but I can see the screen shot you have posted just above. That is what I was afraid of, massive lateral RC movement. This will make the chassis feel very nervous. By the RC moving around so much during maneuvers, you will constantly be trying to correct not just for under/over steer but also because the handling characteristics will be changing dynamically mid-corner.