Upper control arm washers
04-17-2018, 12:56 AM
#1
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Upper control arm washers
Is it legal to run with none in scca street class?
04-17-2018, 12:09 PM
#3
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Post 12/13 states otherwise is why I ask and am looking for clarification...
https://www.corvetteforum.com/forums...s-washers.html
https://www.corvetteforum.com/forums...s-washers.html
Last edited by PRE-Z06; 04-17-2018 at 12:09 PM.
04-17-2018, 02:03 PM
#4
It seems pretty clear cut...
The rule was written for the C4 as those came with spacers and shims - the shims were the part intended by the factory for alignment adjustment; not the control arm spacers. The equivalent to removing the spacers on a C4 would be modifying/milling down the upper C5/C6 dogbones to get more camber.
C5s and C6s only get shims (which look like washers); they are adjusted at the factory and even the dealership as part of a normal alignment. There is no set number for any given car, and again this can change any time they do an alignment as part of your factory approved service.
Recap: C4s have shims & spacers, while the C5/C6 just get shims, thereby making the above rule a moot point of discussion on 1997+ vettes
Originally Posted by SCCA
Control Arm Spacers - Chevrolet Corvette (1984+)
The spacers located on the fasteners for the front upper control arms may not be removed or modified to gain additional camber/caster. Only the shims may be removed...
The spacers located on the fasteners for the front upper control arms may not be removed or modified to gain additional camber/caster. Only the shims may be removed...
The rule was written for the C4 as those came with spacers and shims - the shims were the part intended by the factory for alignment adjustment; not the control arm spacers. The equivalent to removing the spacers on a C4 would be modifying/milling down the upper C5/C6 dogbones to get more camber.
C5s and C6s only get shims (which look like washers); they are adjusted at the factory and even the dealership as part of a normal alignment. There is no set number for any given car, and again this can change any time they do an alignment as part of your factory approved service.
Recap: C4s have shims & spacers, while the C5/C6 just get shims, thereby making the above rule a moot point of discussion on 1997+ vettes
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PRE-Z06 (04-17-2018)
04-17-2018, 04:08 PM
#5
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It seems pretty clear cut...
The rule was written for the C4 as those came with spacers and shims - the shims were the part intended by the factory for alignment adjustment; not the control arm spacers. The equivalent to removing the spacers on a C4 would be modifying/milling down the upper C5/C6 dogbones to get more camber.
C5s and C6s only get shims (which look like washers); they are adjusted at the factory and even the dealership as part of a normal alignment. There is no set number for any given car, and again this can change any time they do an alignment as part of your factory approved service.
Recap: C4s have shims & spacers, while the C5/C6 just get shims, thereby making the above rule a moot point of discussion on 1997+ vettes
The rule was written for the C4 as those came with spacers and shims - the shims were the part intended by the factory for alignment adjustment; not the control arm spacers. The equivalent to removing the spacers on a C4 would be modifying/milling down the upper C5/C6 dogbones to get more camber.
C5s and C6s only get shims (which look like washers); they are adjusted at the factory and even the dealership as part of a normal alignment. There is no set number for any given car, and again this can change any time they do an alignment as part of your factory approved service.
Recap: C4s have shims & spacers, while the C5/C6 just get shims, thereby making the above rule a moot point of discussion on 1997+ vettes
Last edited by PRE-Z06; 04-17-2018 at 04:09 PM.