miket
Junior Member
Posts: 5
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Post by miket on Jun 13, 2022 20:38:53 GMT 12
Hi, a friend and I wish to build a pair of Haynes Roadsters which are Lotus 7 clones using Ford Sierra running gear. We have been collecting together the parts required and wish to know if there are any changes to be made from the plans in the book in order to meet the NZ regulations. In other words will a car built to the book plans be certifiable in NZ? Regards Mike.
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Post by Chris on Jun 14, 2022 9:11:38 GMT 12
Hi, a friend and I wish to build a pair of Haynes Roadsters which are Lotus 7 clones using Ford Sierra running gear. We have been collecting together the parts required and wish to know if there are any changes to be made from the plans in the book in order to meet the NZ regulations. In other words will a car built to the book plans be certifiable in NZ? Regards Mike. Hi Mike There are several iterations of the Haynes Roadster manual, and based on experience with other similar kit cars, it is quite likely that there will need to be changes made to meet NZ requirements. The IFS requires TAC approval at the very least. My advice is to get a copy of the CCM - digital download for free here - www.lvvta.org.nz/shop/new-zealand-car-construction-manual-full-version/ to compare the requirements from the CCM with the Haynes Roadster manual and it will help you go in the correct direction at the very least. Cheers Chris |
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miket
Junior Member
Posts: 5
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Post by miket on Jun 14, 2022 20:37:17 GMT 12
Hi Chris, thanks I have a copy of the manual and it is a little unclear regarding tube sizes for the front wishbones as the Table 6.1 gives tube sizes that are larger than the haynes book, then on page 6-59 Custom independent front suspension A-arm material specifications - it says the TAC will allow smaller sizes for lightweight Lotus 7 clones. I do intend to use the heavier tube in deference to the state of our roads. Availability of suitable tube is a problem however, as one key importer is no longer bringing seamless tube into NZ. I may have to look at using ERW tube. Another possible problem is the recommended brake sizes, the standard Sierra front disc is 240mm dia vented, the recommended disc size in table 8.1 is 280mm dia vented, does this mean that the standard sierra disc is not suited for a vehicle of nearly half the weight? Thanks in advance for your comments, Mike.
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miket
Junior Member
Posts: 5
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Post by miket on Jun 15, 2022 20:35:23 GMT 12
Hi, is seamless line pipe, schedule 40 weight, and ASTM 106 grade B, acceptable for use on custom independent suspension arms? The diameter and wall thickness is heavier than required in the book plans or the constructors manual.
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Post by Chris on Jun 17, 2022 9:56:38 GMT 12
Hi, is seamless line pipe, schedule 40 weight, and ASTM 106 grade B, acceptable for use on custom independent suspension arms? The diameter and wall thickness is heavier than required in the book plans or the constructors manual. Can you please send some specification sheets including sizes for this tube to tech@lvvta.org.nz and we can compare to the requirements. |
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miket
Junior Member
Posts: 5
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Post by miket on Jun 17, 2022 19:15:14 GMT 12
Thanks will do.
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miket
Junior Member
Posts: 5
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Post by miket on Jun 17, 2022 20:20:36 GMT 12
Hi Chris, after carefully reading the Haynes book and the NZ car constructors manual and steel suppliers documentation I have found the answer. We are nearly ready to submit documentation for the build approval process. Thanks Mike.
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