RUNAMUCK Posted February 3, 2012 Share Posted February 3, 2012 Hey Clint, What would the rules be regarding shortening the length of a full chassis? Ie, say a 1946 dodge truck. Quite a long truck, really needs to put cut down to mor ratrod friendly length. I'm told it'd most likely be a "C" section Chassis. Could it just be cut down, and welded up? Or would it have to be ground back so you couldn't tell it'd been done, and then just plead ignorance? A distant cousin of my dads has one that's been sitting on his farm for 25 years, but it pretty rust free. The authentic outdoor weathered look just screams rat rod. But it's far too long. Quote Link to comment Share on other sites More sharing options...
Brock-Lee Posted February 3, 2012 Share Posted February 3, 2012 Hey cletus, what is the go with chopping frame rails shorter, but then welding beefier steel in? would that need to be certed? Or would it be ok if it looked legit enough? depends, what are you looking at doing? any structural modifications need cert. The frames measure 65(w)x45(h)x1.2 wall. If I replace them with something that's 65x25x5mm would that be ok? What sort of strength are we looking for, second moment of area? Y is deceasing so to keep the stress constant fir a given force you have to increase I value by the same factor that you are removing rail height ie 1.8. Edit: my bad if im telling you to suck eggs etc its just this is what I am doing atm to prove to my cert guy what in doing is legit etc. Quote Link to comment Share on other sites More sharing options...
cletus Posted February 3, 2012 Share Posted February 3, 2012 Hey cletus, what is the go with chopping frame rails shorter, but then welding beefier steel in? would that need to be certed? Or would it be ok if it looked legit enough? depends, what are you looking at doing? any structural modifications need cert. The frames measure 65(w)x45(h)x1.2 wall. If I replace them with something that's 65x25x5mm would that be ok? What sort of strength are we looking for, second moment of area? what is the application? what part are you replacing? the whole chassis rail? or just a part? on an mx5? would probably need a certifier to look at it to give you an accurate answer. Supplying engineers calculations will be helpful ie what brockolee said Edit: my bad if im telling you to suck eggs etc its just this is what I am doing atm to prove to my cert guy what in doing is legit etc. not at all..... im still learning how to suck an egg properly Quote Link to comment Share on other sites More sharing options...
cletus Posted February 3, 2012 Share Posted February 3, 2012 Hey Clint,What would the rules be regarding shortening the length of a full chassis? Ie, say a 1946 dodge truck. Quite a long truck, really needs to put cut down to mor ratrod friendly length. I'm told it'd most likely be a "C" section Chassis. Could it just be cut down, and welded up? yep thats fine, cut it on an angle, butt weld it back together, then a fish plate twice as long as the height of the rail over the join. there are other methods in the book but thats probably the easiest to explain/do Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted February 3, 2012 Share Posted February 3, 2012 Cheers Clint! You're the man. Would the fish plates also need to go on the top and bottom of the [ section? Or just each side? Depending on how crisp the folds in the chassis rail section are, it could be possible to fold up an inside and an outside fishplate to completely cover the join. Or wouwld it be prefered to only have it inside and on the outside of the vertical rail section to enabale a good longitudinal weld? Quote Link to comment Share on other sites More sharing options...
Mitch.W Posted February 4, 2012 Share Posted February 4, 2012 i just got some fixed back bucket seats and my standerd rails bolt straight up and its the perfect hight thats a plus! so do i need a cert? Quote Link to comment Share on other sites More sharing options...
zep Posted February 5, 2012 Share Posted February 5, 2012 Does the cert plate have to be riveted on? Most I see are. Quote Link to comment Share on other sites More sharing options...
DJZ Posted February 10, 2012 Share Posted February 10, 2012 Is the form you need to fill out regarding the modifications to the car before cert available online? I can't seem to find it on the LVVTA website. Quote Link to comment Share on other sites More sharing options...
cletus Posted February 12, 2012 Share Posted February 12, 2012 Cheers Clint! You're the man.Would the fish plates also need to go on the top and bottom of the [ section? Or just each side? Depending on how crisp the folds in the chassis rail section are, it could be possible to fold up an inside and an outside fishplate to completely cover the join. Or wouwld it be prefered to only have it inside and on the outside of the vertical rail section to enabale a good longitudinal weld? what you are describing would be fine. its only required on one side of the rail. an alternative is to cap the top and bottom part of the [ instead of the vertical part personally i think it looks neater to do just the inside of the [ (or what you described, completely cover the inside join) when i did the chassis join on a previous project it was a box section, cut it in half, cut 100mm extra from the inner wall each side of the join, fish plate on the inside of the rail, then folded up 200mm long [ section for the inner wall and tig it all together, was hard to see where it was joined Quote Link to comment Share on other sites More sharing options...
cletus Posted February 12, 2012 Share Posted February 12, 2012 i just got some fixed back bucket seats and my standerd rails bolt straight up and its the perfect hight thats a plus! so do i need a cert? no you should be sweet Quote Link to comment Share on other sites More sharing options...
cletus Posted February 12, 2012 Share Posted February 12, 2012 Is the form you need to fill out regarding the modifications to the car before cert available online? I can't seem to find it on the LVVTA website. ive never seen a form like that? maybe a certifier made one up and gave it to you? its a good idea actually, would make life easier identifying whats been changed on a car Quote Link to comment Share on other sites More sharing options...
DJZ Posted February 12, 2012 Share Posted February 12, 2012 Hmm, he showed me one ages ago, it looked pretty offical and he said it's a standard thing. I'll get one off him tomorrow and see. Quote Link to comment Share on other sites More sharing options...
cletus Posted February 12, 2012 Share Posted February 12, 2012 if you could see what number is on it or even a pic would be handy. Might be something thats prior to me starting certing that i dont know about. It may be the 2nd page in the formset, that lists all the mods on the car, usually is filled out by the certifier. Quote Link to comment Share on other sites More sharing options...
cletus Posted February 13, 2012 Share Posted February 13, 2012 Does the cert plate have to be riveted on? Most I see are. yes should be attached with 4 rivets to a part of the body/chassis that cant be removed. Quote Link to comment Share on other sites More sharing options...
JoKer Posted February 13, 2012 Share Posted February 13, 2012 how do they 'prove' cars with mods done 'pre-cert' era are actually legit? know of a few hot rods with '8s in them that "dont need cert" according to owners Quote Link to comment Share on other sites More sharing options...
cletus Posted February 13, 2012 Share Posted February 13, 2012 from LVVTA website- Do I need LVV Certification if I have a Modification Declaration Certificate? Cars that were modified prior to 1 January 1992 were issued with a Modification Declaration Certificate at that time. The Modification Declaration Certificate is valid as long as the vehicle is continually registered and until changes are made to the vehicle, at which time the vehicle must be LVV certified and issued with an LVV plate. Provided the vehicle is still the same as it was in 1992, the Modification Declaration Certificate continues to be valid today for WOF purposes. The WOF issuer is able to check with LVVTA or NZTA to verify details on the certificate. Quote Link to comment Share on other sites More sharing options...
escorted Posted February 18, 2012 Share Posted February 18, 2012 Can you sell a deregistered car without the original ownership papers from when you purchased it? Can you obtain new papers? Quote Link to comment Share on other sites More sharing options...
two_days_late Posted February 19, 2012 Share Posted February 19, 2012 Hey bro's, just got this new daily and it has this random black stuff over the corner lights and indicators. They still seem to work fine through it. Just wondering if its legal for a WOF or if I should try and get it off before I take it through? Quote Link to comment Share on other sites More sharing options...
d.p.n.s Posted February 23, 2012 Share Posted February 23, 2012 can i use rose joint Tie rod ends on my escort van. the van will need a cert when its finished but is this something i can legaly use on the road? once certed cheers dan Quote Link to comment Share on other sites More sharing options...
Nominal Posted February 23, 2012 Share Posted February 23, 2012 can i use rose joint Tie rod ends on my escort van.the van will need a cert when its finished but is this something i can legaly use on the road? once certed cheers dan Highly not likely. Quote Link to comment Share on other sites More sharing options...
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