johntatlow Posted July 10, 2005 Report Share Posted July 10, 2005 Hi, Can anyone give me some advice on how to fit a harness with a standard seat. Do you use a 3 or 4 point harness Where do you put the ancor points? Any help much appreciated The car is a TR5 by the way Quote Link to post Share on other sites
Guest mrodbert Posted July 11, 2005 Report Share Posted July 11, 2005 John, We have a roll bar fitted inside the Surrey top and fixed to the chassis. It's a single rollover and two back stays one, as described in the blue book. Neil Revington do a good one that doesn't impede visibility too much. We then attach a 4 point harness to the roll bar and chassis. However, we do have old style "historic" rally bucket seats that do hold you firmer than the originals. Hope this helps, Mark Quote Link to post Share on other sites
johntatlow Posted July 11, 2005 Author Report Share Posted July 11, 2005 Hi, This is exactly the smae set up as I want - any chance of a photo of the mountings - e-mail to johntatlow@btinternet.com if possible Thanks John Quote Link to post Share on other sites
Tr4Tony Posted July 11, 2005 Report Share Posted July 11, 2005 John One of the key things is to make sure that the belts do not 'push' down on the shoulders of the occupant when they are used - if so you get spinal crush injuries (which are common in low sports cars for this reason). You need to make sure that the belt angle is very shallow - mounting them on the floor on the 'parcel shelf' is not a good idea unless you can loop them round the rollover bar diagonal / horizontal or a specific mounting point. I have a cage in my TR4, belts bolted into the shelf, but 'diverted' around the horizontal so that they 'pull' almost horizontally off my shoulders. This works well. On my 4a I have them on the parcel shelf and honestly its a job I need to do to change them around - they are not right. You could also use a 3 point fixing (i.e. only one rearwards strap) but you may find these uncomfortable in use as i did as im tall. Regards Tony Quote Link to post Share on other sites
johntatlow Posted July 11, 2005 Author Report Share Posted July 11, 2005 Thanks Tony This is what I had read - I do not have a horizontal bar and was wondering how people have solved the problem. Is it a no way to mounting on the parcel shelf as this would be similar to a normal seatbelt? Regards John Quote Link to post Share on other sites
Tr4Tony Posted July 11, 2005 Report Share Posted July 11, 2005 Id call it ba no way - you can mount a horizontal bar between the wheelarches to do the job ok - maybe this is worth a try. This is what I will do on my TR4a. Regards Tony Quote Link to post Share on other sites
david ferry Posted July 12, 2005 Report Share Posted July 12, 2005 The roll over bar on my 3a was built with a horizontal bar between the sides, just below the top of the body, so that the harnesses can attach to this rather than the rear shelf, which would be too low. I also use bucket style seats with these 4 point harnesses. This has got around this potentially dangerous problem of spinal injuries. If I were you, I would have a look at cars at the International, assuming you are attending. You will see a variety of different mounting methods. You can talk to owners, the professionals and see the different installations. My car will certainly be there in the concours hall. Regards David Quote Link to post Share on other sites
Guest mrodbert Posted July 12, 2005 Report Share Posted July 12, 2005 John Tony's right (as per usual ) the parcel shelf is a bad idea. We have the shoulder straps attached to mounting points that are an integral part of the rollbar uprights and cross member, rather than the looped over a horizontal bar as I've seen some on other cars. We got the whole set up done by TRGB when we bought the car. Just an additional point - In my opinion having a rollbar without a decent 4 point harness and seat just creates an additional heavy metal object to put a crease in your cranium if the worst happens. I know some people think you shouldnt have a bar if you're not wearing a helmet, but I'd rather have something than nothing in the event of a "moment". Regards, Mark Quote Link to post Share on other sites
GSKTR4 Posted July 12, 2005 Report Share Posted July 12, 2005 Both Ade and I have the twin roll hoop arrangement as these have integral mounting points for harnesses built-in in just the right position. Also gives you something to mount an extinguisher on. Can't remember where we got them from though ... TRGB maybe? Quote Link to post Share on other sites
Ade-TR4 Posted July 13, 2005 Report Share Posted July 13, 2005 It is TRGB, and they're about 170 notes. They've been specifically designed for TRs so that a soft-topor Surrey will still fit properly cheers Adey Quote Link to post Share on other sites
GSKTR4 Posted July 13, 2005 Report Share Posted July 13, 2005 Oy, you're still on your honeymoon!! leave the TR stuff till you get home - then you can help me weld my rack mounts and nsf suspenion mounts back on Quote Link to post Share on other sites
Tr4Tony Posted July 13, 2005 Report Share Posted July 13, 2005 Adey is just so hard core its unreal ........... Quote Link to post Share on other sites
rudi Posted July 14, 2005 Report Share Posted July 14, 2005 Till now, in my TR3 the 3 point harnesses (4 point harness is not allowed acc. Belgian FIVA rules) are bolted (eyes, plate and nut) in the front attachement points of the fuel tank retaining strap. That is too low and not in the centre of the seat, I agree (but works fine anyway). Having a rollover bar installed recently (Safety Devices via RTR) I intend to install an add. horizontal cross bar with attachements. What size (diam, wall thickness) should be this horizontal bar? Cheers, Rudi Quote Link to post Share on other sites
Ade-TR4 Posted July 14, 2005 Report Share Posted July 14, 2005 sorry, I think I may have an addiction... Quote Link to post Share on other sites
GSKTR4 Posted July 14, 2005 Report Share Posted July 14, 2005 sorry,I think I may have an addiction... a good overdose should put you off for a while - try the International w/e Quote Link to post Share on other sites
marvmul Posted July 14, 2005 Report Share Posted July 14, 2005 Before fitting the harness in my car, I've asked around amongst racers : from the shoulders backwards, the shoulder straps should not be sloping upwards, but horizontal or preferably downwards. Maybe this puts strain on the spine in case of an accident, but it helps preventing the body sliding sidewards out of the harness and forces the body firmly in the seat. An horizontal bar between the top or middle of the inner wheelarches is about right, perhaps the parcel shelf is a bit too low indeed. If you want to make a TR real safe, you need a roll cage, a 4 or 5 point harness fixed on the chassis (lower straps) and the roll cage (shoulder straps), and a strong bucket seat that is attached to the chassis, not merely to the floor. Quote Link to post Share on other sites
jean Posted July 17, 2005 Report Share Posted July 17, 2005 This is how I did it in my 3, but this is only for road use. Jean Quote Link to post Share on other sites
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