Handling issues - need adjustment advice |
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Handling issues - need adjustment advice |
Brian Fuerbach |
Jan 20 2022, 02:57 PM
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#1
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Member Group: Members Posts: 119 Joined: 1-July 19 From: Orange, Ca Member No.: 23,266 Region Association: Southern California |
When driving large sweepers like freeway on ramps at high speed I experience what I can only describe as front end scrubbing. Not understeer, more like the front is just not planted and tracking. Things get better with a full tank of fuel. Is that just the nature of the 914, full tank factored into weight bias, or can the suspension be tuned to emulate the weight.
Here is what Im working with; -19mm adjustable sway-bar set about 1” back from full soft. -Koni yellow adjustable shocks -Stock front torsions -Rear springs are aftermarket (reddish orange color) but I do not know the poundage. Any input would be appreciated. |
slivel |
Jan 25 2022, 10:58 AM
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#2
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Old car....... older driver Group: Members Posts: 508 Joined: 10-July 04 From: San Diego Member No.: 2,332 Region Association: Southern California |
This thread may have played out but I just love to explore the complexities of chassis and suspension. I think suspension and chassis engineers must be some of the most gifted in the auto world. In a previous career in telecom we said the same thing about antenna designers.
Here's a thought experiment: Many do not realize that tires have a spring rate. If you change out your stock wheels and tires, say 15" wheels and 60 ratio sidewalls for 16" wheels with 50 ratio sidewalls you have effectively increased the overall spring rate of the suspension. When the tire encounters a bump, the suspension takes up some of the shock but not all. The tire deforms and the sidewall absorbs some of the shock too. Low profile tires with short sidewalls typically have a higher spring rate. So the higher performance of low profile tires is due in part to increased spring rate, though tread design, compound, and carcass are also a big part. |
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