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Project Fracas - 6Sp A20Nft


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#101 Exmantaa

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Posted 11 March 2016 - 01:03 PM

@ Ed; did you check with your "Tesla" supplier Patrick? Think he still has that 2-11 FIA Überrollbügel, which is triangulated and has those front support struts.

Possible adaptible for in a track Speedster/VX220??



#102 Doctor Ed

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Posted 11 March 2016 - 05:50 PM

this one?:

 

https://www.ebay-kle...956553-223-1616

 

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neat bit of OEM work, but prob a bit much to slice up for use in a VX



#103 Doctor Ed

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Posted 11 March 2016 - 06:56 PM

Having not previously removed a VX220 roll bar could you post some photos up showing the cut outs?

 

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#104 Exmantaa

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Posted 12 March 2016 - 11:04 PM

This one maybe?

https://www.ebay-kle...580370-223-1285

 

S2 rollbar:

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#105 Doctor Ed

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Posted 13 March 2016 - 03:17 AM

That's the one I bought ;) Maik just hasn't removed the listing yet Curious to see how things like seatbelts and the rollbar cover line up / mount Anyone know if the car spits errors if the seatbelt pretensioners are unplugged? Elise belts (which would obviously fit) don't have the pretensioner function

Edited by ed.oates, 13 March 2016 - 03:21 AM.


#106 smiley

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Posted 13 March 2016 - 03:40 AM

Yes they trow an error when unplugged. Theres a resistor solution, but don't the specs. Someone else will pop in for that.

#107 Doctor Ed

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Posted 13 March 2016 - 08:52 AM

A pretensioner isn't a bad safety idea, so a bit loathe to ditch them. Really shouldn't be that hard to get VX spools to fit

#108 Aerodynamic

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Posted 13 March 2016 - 08:54 PM

2 ohm is the bridge resistance. Hehe a pretensioner is a very good idea. Who knows about this stuff.

#109 The Batman

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Posted 13 March 2016 - 09:01 PM

Need a 1.7ohm resistor to get rid of seat belts :)

#110 Doctor Ed

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Posted 13 March 2016 - 10:37 PM

im sure the elise belts would save 500gr or so.... :P



#111 Mopeytitan

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Posted 14 March 2016 - 02:21 PM

I had my seat belts out with nothing fitted and didn't get any errors...

#112 Mopeytitan

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Posted 14 March 2016 - 02:21 PM

By nothing I mean no resistors I had harnesses :lol:

#113 Doctor Ed

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Posted 18 March 2016 - 08:22 AM

lol and behold... S2 roll bar doesn't fit. Mounting feet of the one I just received are about 20mm wider than the vx bar On the upside, the S2 bar does look like a good steel donor so I can beef-up the vx bar, add a harness bar etc

#114 Arno

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Posted 18 March 2016 - 11:40 AM

lol and behold... S2 roll bar doesn't fit. Mounting feet of the one I just received are about 20mm wider than the vx bar  

 

Do you mean that the plates/holes at the bottom are differently shaped and don't match with the holes in the chassis or that the hoop is too wide?

 

In the last case.. Umm.. Yeah.. That's often kinda normal.. People do have to sometimes put some ratchet-straps on these hoops to 'squeeze' them together at the bottom a little, then get all the bolts fitted and torqued down and then release the strap.

The main ali chassis is not sized any differently width-wise between the VX and the Elise(s).

 

Bye, Arno.



#115 Doctor Ed

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Posted 18 March 2016 - 07:02 PM

hoop is too wide. 20mm too wide :huh:

 

ill see if i can compress it a little, but im also looking at the rear support bolt flanges, and they seem to be a slightly different position too.

 

anyway, thanks for the tip, i hadnt imagined that an OEM piece would require that amount of man-handling, so assumed it must just be different



#116 haggi961

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Posted 18 March 2016 - 11:33 PM

The lotus one fits in my car but needed some work with the bulkhead to be bonded back on and some spacers made up to push the rollover bar in the right direction.

#117 haggi961

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Posted 18 March 2016 - 11:50 PM

It would bolt straight in tho but the rollover bar I have is the modern version with the different brackets on the top part for the big roof. The lotus rollover bar is so light compered to rhe vx one.

#118 Arno

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Posted 19 March 2016 - 10:24 AM

ill see if i can compress it a little, but im also looking at the rear support bolt flanges, and they seem to be a slightly different position too.

 

Compared to the orignal VX mounting location that's possible yes.

 

The Toyota engined Elise back stays are similar in design to the VX ones (Rover powered ones are angled and shaped differently), but you either need to make a hybrid or custom back-stays anyway to link up the Elise roll-over hoop to the VX chassis backstay mounting points or weld in new mount points on the Elise hoop in the VX locations.

 

You are grafting bits from one shape/design car in/onto another so things are bound not to match up ;)

 

Bye, Arno.



#119 Doctor Ed

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Posted 19 March 2016 - 01:05 PM

I'm going to make completely new back stays, so it's not a big deal, just a matter in them meeting the firewall correctly (more or less).

#120 Doctor Ed

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Posted 19 March 2016 - 07:20 PM

so a quick comparison...  :happy:

 

first up weights:

vx220: 7.9kg (including headrests)

S2 Elise: 6.1kg (complete)

 

(remember the headrests alone weigh 1.2kg)

 

and some pics of them semi fixed to a chunk of wood, and the S2 compressed with a ratchet strap (which after about 10mm of over compression, sprung back to the right width unassisted)

 

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