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Gas shocks for front flip up window

The drivers front window on many Volvo C30x’s flip out.    They are held out via two rigid steel spars which must be manually placed.     That simply won’t do.

So I replaced them with gas shocks.   two 30 lb gas shocks.

Trog Gas Shocks Window 3

I was able to reuse the bottom spar mount, but had to weld on a new mount on the window frame for the upper end of the shock.

Trog Gas Shocks Window 2

Trog Gas Shocks Window 1

  1. WJM
    May 18th, 2010 at 14:06 | #1

    Hope you won’t be driving that way, with the window open….any major bump will send the window crashing down.
    There are gas-shox with rotating clamp mechanism, for a rigid lock, but I doubt even those could take the full force of 10G or more….

    Btw, before anyone wonders: yes, you can drive at full speed with the window(s) open; air speed can even be neatly controlled by opening/closing the side windows, from a (remarkably mild) breeze to full storm.
    Or better: in hot/humid climates, you *must* drive with that window open, otherwise you will suffer a heat-stroke, with the additional heat radiating from below (engine+radiator)….:))

    Note also that the front window is already vulnerable to large bumps in the ‘slightly’ open position (overturning the bottom clamps as ‘pusher’), because all the weight then hangs on the top hinges, instead of being tightened into the rubber seal….that is possibly a good thing of your shox, taking some of the load off the hinges (but at any major bump, that advantage is limited too….).

    Alternative: originally Volvo had also a toothed elbow-joint available, apparently factory in some markets (Malaysia); the ones used in the Dodge Power Wagon W52 are supposed to fit….this would then also allow incremental/inbetween positions, more than just ‘unclamped’ & fully open.

  2. wesc
    May 19th, 2010 at 13:50 | #2

    Yep, only for non-driving (or very slow speed on level ground). I’ll look into the rotato-lock gash shocks.

  3. Andrew
    July 5th, 2011 at 15:40 | #3

    Hi, I was following your build, what happened?

  4. wesc
    July 10th, 2011 at 07:27 | #4

    Been on hold for a bit due to other projects. Post coming explaining…

  5. wesc
    July 13th, 2011 at 20:30 | #5

    I’ve since taken Trog for some drives with the front window open on some pretty bumpy dirt roads at 30mph No problem with the window slamming down. There’s quite a bit of sticktion on gas shocks that is difficult to overcome.

  6. August 3rd, 2011 at 15:00 | #6

    wesc :
    I’ve since taken Trog for some drives with the front window open on some pretty bumpy dirt roads at 30mph No problem with the window slamming down. There’s quite a bit of sticktion on gas shocks that is difficult to overcome.

    Hmm….but mechanically/geometrically, the different position of your window-side hinges could make things worse, even for the bending of the window itself, cq even before coming down (and possibly crashing into the window frame/bottom (although that also depends on damper friction, more than just stiction (possibly even progressively with speed? (that would be nifty; perhaps also an interesting detail to ask any supplier/manufacturer you get into contact with)).

    Also not sure about the exact speeds I drove in the Gobi desert (more gravel & dirttracks than sand), but I don’t think any of my multiple airborn experiences were close to full speed….so 30mph might be enough for that kind of physics….;))
    (the very last road in Mongolia I had that experience was while competing with a Citroen 2CV….afterwards the driver asked me whether that washboard-road was indeed so horribly rutted, or that he should start renovating his complete steering system before entering China….never ever before in that Citroen 2CV had he experienced the feeling as if the steering collumn would rise out of the dashboard and fall apart in his hands….:))
    (and this is a vehicle that was promoted by Citroen in the 50′s as being suitable for farmers to transport their raw eggs with….:))
    (if that one doesn’t cope with a road like this, nothing should….but a LWB Volvo 6×6 could still top it, at least in road stability….:))
    (though my steering wheel also felt as it would fall apart….gruelling)

    PS: be sure to put at least some elastic straps around the dashboard-compartiment on the right….otherwise all the crap in there comes flying into the face of the co-pilot, during those airborn manoeuvres….:))

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