Hi Larry:
No, definitely no problems. It was mostly just curiosity. I once saw a
Datsun 240Z with a supercharged 350 chevy motor. The owner indicated
that he had installed some chassis modifications to keep the car from
twisting like a pretzel.
It seems that torsional stiffness is something that is regularly
mentioned in the newer car magazines (ie 'this years model has 30% more
stiffness, etc.) and that's with 35 years of structural improvements
over our cars. Made me wonder just how much behind we really are. Of
course as I write this I think about the Morgans which I gather USED the
chassis flex as part rough road absorption system. Anyway, since our
cars don't have a welded hardtop and convertibles are notorious for
flexing, I wondered what I could do to stiffen the chassis without
installing a roll cage. Does it need to be stiffer for day to day use?
Probably not, but when I run out of other projects, it might be worth
getting into.
Of course if I ever get to something like Tim Ronak's level of power, it
sounds like I might need to look into it :-)
Thanks for the input, Larry, and I'll be interested in seeing what Tim
decides to do for his car.
Regards
David
Larry Paulick wrote:
> Dave, weld the seams in the car where there are only spot welds, and
> after that, start with tubing, i.e. roll cage. But are you having a
> problem now?
>
> Larry
>
> sosnaenergyconsulting wrote:
>
>
>>Hi all:
>>Short of a cage (for us street-only types that want to be stealthy) is
>>there anything that can be done on the chassis plane itself (example:
>>adding subframe connectors to the Mustang Fox platform) to create
>>additional torsional stiffness?
>>
>>Regards.
>>
>>David (sometimes stealthy)Sosna
>>
>>Bob Palmer wrote:
>>
>>
>>
>>
>>>Henry, Tim,
>>>
>>>My thoughts on this are that the steady-state torque on the chassis is the
>>>same and symmetric, whether you use solid or soft mounts, but the momentary
>>>torque will be much higher (e.g., when you shift gears) with solid mounts. I
>>>agree with Tim that a through-bolt or equivalent to limit extension of both
>>>motor mounts is the best solution. Anything you can do to stiffen the
>>>chassis is still a good idea, with or without solid mounts.
>>>
>>>Bob Palmer
>>>rpalmer@ucsd.edu
>>>robertpalmer@paulhastings.com
>>>rpalmerbob@adelphia.net
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