Nick, I reckon these are good questions. Sorry I cant help,
because I am after the same answers but for a street 1600!!!
Can anyone help us??!
TIA Andrew
> List members, I have some questions regarding seam welding and general competition
>body-shell preparation.
> I have located a reasonably good Stanza shell and have an L20B ready to go in.
>Before it does I would like to seam weld and strengthen the body shell to prepare it
>for the rigorous thrashing it is about to receive.
> I have had a look at the very good Ford Escort site at www.osella.com.au.
>
> 1. I would like to use an oxy-acetylene welder to do the seam welding - I don't have
>access to a MIG. The application of heat is so much slower with an oxy set than with
>an arc welder, will excessive annealing take place? - I am specially concerned about
>front strut towers and chassis rails.
> In simpler language will my body shell be stiffer or softer after seam welding with
>an oxy set?
>
> 2. The general technique recommended by the Ford works rally department in the 70's
>(see website above) was to seam weld 1/2 inch, then leave 1 1/2 inches, then weld 1/2
>inch, etc.. Leaving gaps prevents cracks spreading and I suppose the size of the gaps
>offsets any annealing or embrittlement.
Any comments or suggestions?
>
> 3. I have inspected a Datsun 1600 rally car and noticed a long plate ( reaching from
>the bulkhead to the front crossmember) welded onto the outside of the driver's side
>chassis rail (i.e. inside the wheel well). This plate was supposed to reinforce the
>steering box - I don't see how it does it,
it could be there for another reason, any ideas? An angle bracket inside the car
mounted from the steering box to the body shell / chassis rail would be better.
>
> 4. Should there be gusset plates from the bulkhead to the chassis rails? Again, see
>the Ford Escort site for details. However, the Datsun is designed differently in this
>area, the bulkhead slopes away to the rear of the car.
>
> 5. The front radius rod brackets take a fearsome hammering and could probably be
>pulled out bolts-and-all from the front crossmember. I've seen it happen on a (rusty)
>200B. How can this area be reinforced?
>
> 6. Are there any known weak points in a live-axle Datsun?
>
> Any help or advice would be much appreciated.
> Regards,
> Nick
>
>
>
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