SPYDER
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| posted on 2/4/09 at 08:28 PM |
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Lightweight Stryker Chassis 30 kgs!!!
I offer you the opportunity to build a superlightweight BEC or CEC even.
This is a ROUNDTUBE Stryker chassis, apart from the extreme back end which is the usual rectangular. It weighs a smidge over 30 kilos!!
As far as we know, this roundtube chassis is unique!
We reckon that a 350 kilo BEC build is achievable, possibly less. What do you think?
We acquired it from Stuart Taylor Motorsport ( where it was a lightweight development exercise) along with a Phoenix chassis, the building of which
has left us with no time to build the Stryker.
It is set up for a live axle and we have an Escort axle casing which goes with it. This is fitted with brackets IIRC.
There's a pedal box too.
There are no front suspension mounts so the builder can choose whatever configuration they like.
This will obviously require more than a casual knowledge of geometry, although there are plenty of cars out there from which to take measurements.
There are a few areas which we feel require a little more bracing, namely the floor. This was going to have bonded composite panels. Shouldn't
add much weight though. The front may require similar attention and will depend, of course, on the chosen configuration. It really is a blank
canvas.
It does have surface rust all over. Nothing serious but it looks worse than it is. Honestly. It was like this when we got it. It is stored in my
garage. The buyer may wish to tackle this themselves to save cost, or have it blasted.
I'll donate a pack of Scotchbrite!
I recommend viewing. We are 5 mins from M1 J27. It will easily go on a roof rack.
We will give all assistance and advice possible.
I have a set of Stryker uprights for sale seperately.
I doubt that you will find a lighter chassis, the possibilities are endless. I only wish we had time to do it ourselves. We were even contemplating
GSXR750 power. 150 hp and half a million revs!!
Have I whet your appetite? Have I got you thinking?
How light dare you go?
£250 and it's yours.
Any comments you may have are more than welcome, but I'm not asking for a critique on chassis design. As I say, this was an experimental chassis
made by STM. It is unfinished and will require some in-depth knowledge to complete.
In the right hands it could be a very special build, possibly one of the lightest???
Geoff.
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Garage Clearout
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| posted on 2/4/09 at 08:38 PM |
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considering most 7 chassis weigh under 60kg's powercoated, and that includes proper roll bar, steel bulkheads and all the suspension mounts,
I fail too see how that chassis can be anymore than about 10-15kg's lighter than any other chassis when it's complete.
take 15kgs of the average light built striker and it will still weigh over 400kgs.
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SPYDER
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| posted on 2/4/09 at 08:52 PM |
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You may be right, it depends on the spec of "the average light built stryker" and how determined you are to keep " building in
lightness"
With race bodywork and light wheels and tyres etc., who knows?
I still think 350 could be on.
Geoff.
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flak monkey
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| posted on 2/4/09 at 08:56 PM |
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quote:
Originally posted by Garage Clearout
considering most 7 chassis weigh under 60kg's powercoated, and that includes proper roll bar, steel bulkheads and all the suspension mounts,
Not true, most 7 chassis are in the region of about 80kg when complete minus all the panels, but including brackets and rollhoop etc.
That STM chassis will be lighter, but not much by the time you have added a decent rollcage, finished the triangulation and added all the brackets. I
would say theres at least another 20-25kg worth of metal to go into it.
Sera
http://www.motosera.com
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SPYDER
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| posted on 2/4/09 at 09:18 PM |
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Chassis is now sold.
I doubt if it will need 25 kgs more going in to it. It's only 30 kgs now. 25kgs is nearly the same amount again?? The main addition will be the
roll bar.
I'll ask the new owner to weigh it again with the mounts on and extra bracing done. I'm as interested as you are!
Thankyou for your comments.
Geoff.
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SPYDER
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| posted on 2/4/09 at 09:23 PM |
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The uprights are sold too.
Geoff.
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Garage Clearout
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| posted on 2/4/09 at 09:32 PM |
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quote:
Originally posted by flak monkey
quote:
Originally posted by Garage Clearout
considering most 7 chassis weigh under 60kg's powercoated, and that includes proper roll bar, steel bulkheads and all the suspension mounts,
Not true, most 7 chassis are in the region of about 80kg when complete minus all the panels, but including brackets and rollhoop etc.
That STM chassis will be lighter, but not much by the time you have added a decent rollcage, finished the triangulation and added all the brackets. I
would say theres at least another 20-25kg worth of metal to go into it.
I suppose that depends how many chassis you've weighed, but almost everyone i've seen weighed has been about 60kg's
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t.j.
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| posted on 2/4/09 at 09:32 PM |
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The chassis looks a bit skinny to me.
It is sure not ment to have an IRS.
And the inner seatbelt mounting point it missing, but where to place?
Please feel free to correct my bad English, i'm still learning. Your Dutch is awfull! :-)
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cloudy
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| posted on 2/4/09 at 10:06 PM |
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Tube is the way to go for getting the most strength out of a given weight, and 350 is possible (I should know  ) you'd need a really
lightweight prop and diff though...
Looks like the beginnings of an interesting project...
James
www.warnercars.com
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fridgeracer
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| posted on 3/4/09 at 01:05 PM |
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Agreed tube is the way for a light chassis.
That's a good project for someone.
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