Echidna
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| posted on 7/10/08 at 07:37 PM |
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Sierra upright lightening
Has anyone ever tried to lighten a Sierra upright? I think that this upright is quite heavy and strong and it would be a good idea to
"steal" some grams, preferably using FEA software.
[Edited on 7/10/08 by Echidna]
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coozer
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| posted on 7/10/08 at 07:58 PM |
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Don't do it! Not worth the thing giving up mid corner.
If you want lightness get a bespoke light upright to start with...
1972 V8 Jago
1980 Z750
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Echidna
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| posted on 7/10/08 at 08:13 PM |
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Which upright would you recommend?
The Cortina uprights from Raceleda are light but very expensive and with almost zero KPI.
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blakep82
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| posted on 7/10/08 at 08:18 PM |
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save weight elsewhere!
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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smart51
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| posted on 7/10/08 at 08:32 PM |
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Given that the upright supports the weight of a sierra cosworth V6, it is more than strong enough for a locost. It is theoretically possible to
remove some weight and it still be strong enough.
The fact that you are asking for opinions on here shows that you are not confident enough in your ability to engineer weight out of the component.
That being the case. I'd leave it alone.
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Echidna
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| posted on 7/10/08 at 08:34 PM |
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Unsprung weight is more important that any other weight. Also, the Sierra uprights are designed to withstand to a lot more loads than the loads of a
lightweight car.
[Edited on 7/10/08 by Echidna]
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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Echidna
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| posted on 7/10/08 at 08:37 PM |
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quote:
The fact that you are asking for opinions on here shows that you are not confident enough in your ability to engineer weight out of the
component. That being the case. I'd leave it alone.
I am asking here to know if there are anybody who has done it before. There are a lot of ways to be sure that your solution will work with success.
And i am an engineer.
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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smart51
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| posted on 7/10/08 at 09:00 PM |
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quote:
Originally posted by Echidna
I am asking here to know if there are anybody who has done it before. There are a lot of ways to be sure that your solution will work with success.
And i am an engineer.
I am an engineer too and that's why I'd leave it alone. Fair enough though, If an expert showed me exactly what I could and
couldn't remove then that would be fair enough.
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Wadders
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| posted on 7/10/08 at 09:13 PM |
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I reckon it would be easier and probably safer to fabricate your own uprights, that way you can dictate the geometry and to an extent the weight.
Al.
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snapper
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| posted on 7/10/08 at 09:17 PM |
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I would not remove metal from such a serious stressed component from the advise gained on a forum. Which advise is correct? get it wrong and you could
die.
A carbon seat or ally panels could save as much
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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Ivan
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| posted on 8/10/08 at 07:21 AM |
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I would definitely rather go the route of a properly designed and fabricated part than the unknown of fiddling with an already manufactured part as
you just don't know the material properties of the Sierra part or it's design parameters.
Rorty's idea of laser cut keyed parts to improve integrity and more particularly accuracy has a lot of appeal to me.
And you can get better geometary as mentioned above.
And if you are an experienced design engineer you just might come up with something really special  i.e. light, durable, strong, with the right
geometery and reasonably priced.
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