ptf
Tyre kicker
Posts: 4
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Post by ptf on Sept 15, 2020 10:07:39 GMT 12
So the Nissan 350z have a known issue with suspension geometry when lowered. It seems there are few ways to remove the negative camber from the front alignment. What is LVVTA's opinion on the following upper control arms: www.spcalignment.com/component/spc/?task=part_description&pid=73000 (SPC 73000) Is this part certifiable? The common NZ locally available equivalent "Hardrace" don't have enough positive camber adjustment. |
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Post by Chris on Sept 16, 2020 8:17:31 GMT 12
So the Nissan 350z have a known issue with suspension geometry when lowered. It seems there are few ways to remove the negative camber from the front alignment. What is LVVTA's opinion on the following upper control arms: www.spcalignment.com/component/spc/?task=part_description&pid=73000 (SPC 73000) Is this part certifiable? The common NZ locally available equivalent "Hardrace" don't have enough positive camber adjustment. Hi Dan, there has been an increase in requests regarding the style of arm, which is assembled from multiple pieces. Due to the design, it does not meet the wording of the LVV Suspension Systems Standard, which states. “A suspension arm that is fitted to a low volume vehicle which is a volume-produced aftermarket bolt-in type, and which is mounted directly to the vehicle’s unmodified original suspension attachment points, therefore, maintaining all original suspension geometry, other than to allow additional adjustability, must:
(a) follow sound time-proven designs, and be consistent with the common time proven makes….”
Because these components are not time-proven and also as arms can be built up from individually-purchased components from different sources, this makes them custom arms and as such TAC Design Approval is required for them. Cheers Chris |
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ptf
Tyre kicker
Posts: 4
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Post by ptf on Sept 16, 2020 11:10:01 GMT 12
Hi Chris,
thank you for the explanation.
Could you confirm the suitability of the ABS Shim/Relocator kit (included in the SPC 73000 arm) and if this part requires additional LVVTA certification?
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Post by Chris on Sept 16, 2020 11:27:44 GMT 12
Hi Chris, thank you for the explanation. Could you confirm the suitability of the ABS Shim/Relocator kit (included in the SPC 73000 arm) and if this part requires additional LVVTA certification? Yes they would require cert, whether they would be able to be certified, I cannot answer as there is nothing in the existing requirements that would cover it, so would need to be put through TAC. What sort of modifications are you doing and how much camber have you got, as there may be alternative solutions. |
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ptf
Tyre kicker
Posts: 4
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Post by ptf on Sept 16, 2020 15:47:32 GMT 12
Hi Chris,
Just running a basic Tein Basis-Z coilovers, the height is a decent drop from factory - negative camber can't be dialed out at the current height and is currently sitting around -2.0 degrees
Have tried to align with similar arms such as Hardrace, but the maximum positive setting was close to the factory arm.
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Post by Chris on Sept 16, 2020 16:04:58 GMT 12
Hi Chris, Just running a basic Tein Basis-Z coilovers, the height is a decent drop from factory - negative camber can't be dialed out at the current height and is currently sitting around -2.0 degrees Have tried to align with similar arms such as Hardrace, but the maximum positive setting was close to the factory arm. Hi Dan We allow either half a degree over maximum factory specification or -1.50 degrees, whichever is greatest. For example - factory specification is -0.75 degrees +/- 0.50 degrees (max factory spec -1.25 degrees) then we would allow up to -1.75 degrees of camber. Keep in mind that above is full degrees, some wheel alignment machines measure using degrees and minutes. (half a degree is 30 minutes) That example - factory specification is -0.45 degrees +/- 30 minutes (max factory spec -1.15 degrees) we would allow up to -1.45 degrees of camber. If you are unable to get under maximum spec then you may be left with having to raise the vehicle to bring the camber back in line. Cheers Chris |
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ptf
Tyre kicker
Posts: 4
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Post by ptf on Sept 30, 2020 16:46:05 GMT 12
Hi Chris, Just running a basic Tein Basis-Z coilovers, the height is a decent drop from factory - negative camber can't be dialed out at the current height and is currently sitting around -2.0 degrees Have tried to align with similar arms such as Hardrace, but the maximum positive setting was close to the factory arm. Hi Dan We allow either half a degree over maximum factory specification or -1.50 degrees, whichever is greatest. For example - factory specification is -0.75 degrees +/- 0.50 degrees (max factory spec -1.25 degrees) then we would allow up to -1.75 degrees of camber. Keep in mind that above is full degrees, some wheel alignment machines measure using degrees and minutes. (half a degree is 30 minutes) That example - factory specification is -0.45 degrees +/- 30 minutes (max factory spec -1.15 degrees) we would allow up to -1.45 degrees of camber. If you are unable to get under maximum spec then you may be left with having to raise the vehicle to bring the camber back in line. Cheers Chris Thanks for the clarification. In terms of TAC approval, I was advised that there might be an option to send in the part in to gain TAC approval, or do technical drawings always need to be provided? |
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Post by Chris on Oct 1, 2020 7:27:36 GMT 12
Hi Dan We allow either half a degree over maximum factory specification or -1.50 degrees, whichever is greatest. For example - factory specification is -0.75 degrees +/- 0.50 degrees (max factory spec -1.25 degrees) then we would allow up to -1.75 degrees of camber. Keep in mind that above is full degrees, some wheel alignment machines measure using degrees and minutes. (half a degree is 30 minutes) That example - factory specification is -0.45 degrees +/- 30 minutes (max factory spec -1.15 degrees) we would allow up to -1.45 degrees of camber. If you are unable to get under maximum spec then you may be left with having to raise the vehicle to bring the camber back in line. Cheers Chris Thanks for the clarification. In terms of TAC approval, I was advised that there might be an option to send in the part in to gain TAC approval, or do technical drawings always need to be provided? Hi Dan TAC approval can be applied for, keeping in mind that there is no guarantee they will be accepted, the first step would be to provide material specifications and all dimensions of each component. TAC may want to see the arm but there is no point sending the arm until they request it. Cheers Chris |
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