|Simon Smith's AK with gas struts|
Using the bonnet stay purchased from GD, I calculated the length of struts to order. I decided that 8 mm diameter was adequate - this is the rod diameter. I then worked out the stroke and the extended length that I required, which was around 220 mm and 470 mm respectively. The nearest gas strut stroke that SGS offered in their NitroLift range was a 200 mm stroke with an extended length of 450 mm (measured to the shoulder of the cylinder) - part number GSV8-200.
The end fixings ordered were 10 mm ball stud type and this adds 25 mm to the end of the centre of the fixing, with an M6 male fitting. This will give an extended length for the strut of 500 mm (450 + 25 +25) and a stroke of 225 mm (200 + 25) which should be ok. The total cost was around £45, plus the brackets etc, so say £50.
To keep the bonnet stays open, with the bonnet lifted, I also ordered a safety lock for each strut. These did not fit - see later!
Thanks to Rob here for the guidance - see the link to his blog to the right of this article.
To locate the strut to the inner wing, I made a pair of brackets from 25 mm angle 3 mm aluminium, with three 6 mm holes (one in the centre for the strut location/pivot point). The brackets were 250 mm long and fitted up behind the lip of the engine bay. One needed a small amount of filing as the return was slightly smaller.
|Bracket with three 6 mm holes|
|Hole positions for the bracket|
|Bracket fixed in place|
The cylinder of the strut was positioned at the end farthest away from the body fixing point (nearest to the windscreen). The other end was fitted to the pivot point on the body. I then compressed the gas strut (after releasing the pressure for about 15 seconds [apparently this reduces the pressure from 700 N to around 250 N!] - but check your own struts for this) and marked the pivot position on some masking tape attached to the wing. The distance was 300 mm from the centre of the body pivot. I then transferred this to some masking tape on the bonnet.
|Pivot position marked on wing and bonnet|
|M6 rivnuts in place|
|Strut from inside the engine bay|
|Strut from outside the car|
|Locking tube fouled the lower mounting point when the bonnet was lowered|