scootz
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| posted on 11/11/09 at 10:59 AM |
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Chassis Weight...
Had a look in the search facility to see what kind of chassis weights folk were finding... I'm seeing figures of 35-40kg 
Is this the norm for a typical 7 space-frame?
It's Evolution Baby!
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speedyxjs
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| posted on 11/11/09 at 11:02 AM |
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Mine is heavier as im using thicker walled steel. i can only just lift mine off the ground on my own so must be around 50 - 60 kg at a guess
How long can i resist the temptation to drop a V8 in?
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scootz
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| posted on 11/11/09 at 11:08 AM |
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Blimey... the Quantum stainless monocoque is 98kg!
Will have to loose some of that flab from elsewhere methinks!
It's Evolution Baby!
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l0rd
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| posted on 11/11/09 at 11:08 AM |
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Well
Everybody suggest that they use anput 46m of steel.
Depending on the thickness of it, you have about 1Kg per meter.
So the chassis would be about 46Kg and then you need to add all those brackets etc.
I would think a complete chassis to be in the region of 65-75Kg?
[Edited on 11/11/09 by l0rd]
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MikeCapon
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| posted on 11/11/09 at 11:22 AM |
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Just for interest
Square tube 25 X 1.6 = 1168 g/m
Square tube 25 X 1.5 = 1100 g/m
Round tube 25 X 1.6 = 917 g/m
Round tube 25 X 1.5 = 864 g/m
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MikeRJ
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| posted on 11/11/09 at 11:26 AM |
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quote:
Originally posted by scootz
Blimey... the Quantum stainless monocoque is 98kg!
Will have to loose some of that flab from elsewhere methinks!
The Quantum is well known as a bit of a heavyweight 7 compared to many of the space frame cars.
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scootz
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| posted on 11/11/09 at 11:28 AM |
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quote:
Originally posted by MikeRJ
quote:
Originally posted by scootz
Blimey... the Quantum stainless monocoque is 98kg!
Will have to loose some of that flab from elsewhere methinks!
The Quantum is well known as a bit of a heavyweight 7 compared to many of the space frame cars.
Does it get teased by the other 7's in the car park for being a bit of a flabby kid!?
It's Evolution Baby!
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Colnago_Man
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| posted on 11/11/09 at 11:37 AM |
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My Mk Chassis was 59kg including powercoat.
Caveat : This was weight using a strong friend and some bathroom scales!
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scootz
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| posted on 11/11/09 at 11:50 AM |
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650kg is the figure for a fully equipped Pinto based Quantum Xtreme. My mission is to get it into the 5's.
Winter action plan...
DELETE
Spare Wheel Assy (already done - 14kg).
Windscreen Assy (already done - 9kg).
Heater and Wipers (already done - 4kg).
CHANGE
15" TSW's and Yoko's to 13" Barnby Split-Rims and ACB-10's (should see 20kg total reduction).
Sierra Iron Calipers to Ali (should see 4kg total reduction).
Leather sofa's... sorry Seats to GRP (should see 7kg reduction).
Mahoosive Battery to Odyssey (already done - 3kg reduction)
Engine (Pinto to Duratec) - 40kg reduction.
So that's a theoretical 101kg total reduction... assume an initial 200BHP from the Duratec, then a theoretical 370 BHP per tonne.
I'm far too long in the tooth to believe it will all pan out so sweetly, but an encouraging guesstimate if nothing else!
The ultimate aim over the next couple of years will be to get it to the 500 bhp per tonne mark!
It's Evolution Baby!
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l0rd
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| posted on 11/11/09 at 11:55 AM |
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I would also suggest custom made disc brakes
S*d the original ones.
Alloy bellhousings is the way to go
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l0rd
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| posted on 11/11/09 at 11:58 AM |
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Also, you can save a couple of pounds by ditching the inboard suspension.
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hughpinder
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| posted on 11/11/09 at 12:09 PM |
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The calculation for my chassis with all brackets/braces etc shows it will come in at about 68 kg, but that includes 14kg for the roll cage
Hugh
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Hammerhead
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| posted on 11/11/09 at 01:23 PM |
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I think in the region of 80kg is about right, (or about the weight of a average man)
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motorcycle_mayhem
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| posted on 11/11/09 at 03:16 PM |
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Looking at the paddock sometimes... saving a few Kg's off the chassis seems a bit silly when I see 19st of lard squelching it's way into
the cockpit.... shudder.
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alistairolsen
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| posted on 11/11/09 at 03:23 PM |
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you can fix the 19stone later, its hard to remove weight from the chassis.
I had a chassis that was overweight and binned it and started again because I figured that saving 100 on th chassis was daft when to rectify it id
destroy £200 in panelling and cause a lot of work!
My Build Thread
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matt_gsxr
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| posted on 11/11/09 at 03:54 PM |
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Scootz,
I don't know the purpose of your build, but are you sure you want ACB10's for road use?
I only ask because I was running this set-up and it was a crazy tramlining monster, which to be honest felt dangerous.
I think you might save even more weight than 20kg all around as I saved that going from Escort/Orion 14inch pepperpots, to ACB10's on 13inch
4-spoke revolutions, and I know the Barnby's to be a 2kg lighter per corner than the Revs.
FWIW I have put the old wheels back on to keep me on the right side of the road.
Matt
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scootz
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| posted on 11/11/09 at 06:27 PM |
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Hiya Matt... I ran them on my Caterham and loved them.
I know what you mean about the tram-lining, but once I got used to it I was in my element!
It's Evolution Baby!
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blakep82
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| posted on 11/11/09 at 06:29 PM |
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hmm, wonder what mine weighs... i'll never find out now lol i'm not stripping it all back down. yet... save that for the final build.
how could i weigh it? any fishing scale type contraptions that weight up to a fair bit? sharks maybe?
________________________
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scootz
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| posted on 11/11/09 at 06:40 PM |
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Easy... just weigh yourself on the bathroom scales, then pick up your car and hop on the scales again.
The second figure minus the first figure will give you the weight of your car!
HTH!
It's Evolution Baby!
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blakep82
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| posted on 11/11/09 at 06:45 PM |
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ah! why didn't i think of that!
just thinking, the first book shows some bloke picking up a almost finished chassis. practically holding it above his head.
a heavy suitcase at the airport is usually about 35kg.
i can't lift my chassis on my own, but 4 of us got it off a lorry easy enough
seen
this
not sure if i'm convinced it looks like it'll lift 150kg though
________________________
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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flak monkey
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| posted on 11/11/09 at 06:46 PM |
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When I modelled one in cad with all the brackets and floor etc IIRC it came out at about 75kg with an ali floor.
David
Sera
http://www.motosera.com
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bimbleuk
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| posted on 12/11/09 at 09:01 AM |
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Striker chassis have a rep for being light but I think its more to do with the smaller overall dimensions.
I looked at a Striker chassis yesterday which has been re-engineered to fix the known weak points and specifically fits a Duratec (which they usually
struggle to accommodate). Definitely going to be heavier but I can see how much stiffer it will be when finished.
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Hammerhead
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| posted on 14/11/09 at 01:56 PM |
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quote:
Originally posted by flak monkey
When I modelled one in cad with all the brackets and floor etc IIRC it came out at about 75kg with an ali floor.
David
did that figure include welding wire?
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blakep82
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| posted on 14/11/09 at 02:02 PM |
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quote:
Originally posted by Hammerhead
quote:
Originally posted by flak monkey
When I modelled one in cad with all the brackets and floor etc IIRC it came out at about 75kg with an ali floor.
David
did that figure include welding wire?
was wondering that myself. my chassis has something like 87m of welding in it. thats going to add a fair bit
________________________
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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iank
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| posted on 14/11/09 at 02:23 PM |
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quote:
Originally posted by blakep82
ah! why didn't i think of that!
just thinking, the first book shows some bloke picking up a almost finished chassis. practically holding it above his head.
a heavy suitcase at the airport is usually about 35kg.
i can't lift my chassis on my own, but 4 of us got it off a lorry easy enough
seen
this
not sure if i'm convinced it looks like it'll lift 150kg though
Some bloke being Ron C. The chassis he's waving around is rumoured to be (and whisper this quietly) one made from aluminium that never made the
road.
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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