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Can I Mount My 4 Point Harness Like This?

abcent

By abcent,
in Motorsport Discussion & Builds

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Roy Grand Master

Roy

Posted
Posted

Even if you have a fixed back seat its easy to drill a whole in the tunnel with a pad un the underside for fastening the eye bolt for harness use.

Then for your lap sash you can easily weld a tab onto the new base frame that you use for the rails on the fixed back seat. The std seat belt botls on/off the seat frame on R32 GTSt, so its not that difficult to have the best of both worlds.

Best value seat on the market is Velo. Look great, very comfortable and very good quality

Esprit.jpg

G.P-90.jpg

I use to have the Espirit in my car before going to the carbon Momo. Soon to have a carbon Cobra...would have a matching pair but for...well thats another story :)

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djr81 Grand Master

djr81

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Even if you have a fixed back seat its easy to drill a whole in the tunnel with a pad un the underside for fastening the eye bolt for harness use.

Then for your lap sash you can easily weld a tab onto the new base frame that you use for the rails on the fixed back seat. The std seat belt botls on/off the seat frame on R32 GTSt, so its not that difficult to have the best of both worlds.

Best value seat on the market is Velo. Look great, very comfortable and very good quality

Esprit.jpg

G.P-90.jpg

I use to have the Espirit in my car before going to the carbon Momo. Soon to have a carbon Cobra...would have a matching pair but for...well thats another story :wave:

I was looking at the fat arse version (I have child bearing hips, all the males in my family have them) of the GP90. They have the benefit of being made here in Oz. Which is always nice. They are a damn fine seat.

I assumed the bottom two belts on a six point harness would go through the base of the seat & fix to the same anchorages as the lap belts. Or have I got this wrong, too?

Beer Baron Grand Master

Beer Baron

Posted
Posted

no, they are anchored in the centre underneath the seat. you will need to drill a hole in the floor directly under the seat if you want to run the nut straps.

I had a velo GP90 too. yes they are a good value seat and can accomodate the 'ample gentleman' :wave:

Roy Grand Master

Roy

Posted
Posted

From memory, from the final seating position, you have 20 deg of vertical either forwards or rearwards for mounting your crutch strap. So that means there is no way you can utilise any factory pick ups for those mounting points. Again, if you need to use a 6 point harness then its not that hard to frill through the floorpan and with a comp plate mount the eye bolt for the harness.

Have you ever driven a car with a crutch strap? I have driven an old Van Diemen and the harness almsot made my cry it was so painful. So 1st thing is to check if you think you can get comfortable with the your balls being cut in half by a strap. :wave:

Beer Baron Grand Master

Beer Baron

Posted
Posted

yeah when I drive the race car (alfa) i leave the crutch strap off. it gives me the shits. I've tried both the T shape ones, and the V shape ones and they both suck. hence when i bought the willans for the GTR i bought it sans crutch breaker.

djr81 Grand Master

djr81

Posted
Posted
From memory, from the final seating position, you have 20 deg of vertical either forwards or rearwards for mounting your crutch strap. So that means there is no way you can utilise any factory pick ups for those mounting points. Again, if you need to use a 6 point harness then its not that hard to frill through the floorpan and with a comp plate mount the eye bolt for the harness.

Have you ever driven a car with a crutch strap? I have driven an old Van Diemen and the harness almsot made my cry it was so painful. So 1st thing is to check if you think you can get comfortable with the your balls being cut in half by a strap. :)

So do they chafe your bollocks when you head out (ie when they are large) or on the way back after you have scared yourself silly? (ie when they have shrunk to the size of sultanas) :blush:

I drove a Mazda with a 4 point harness. As I said the lap belts just rode up over my guts - hence if I did have a bingle all that would have happened would be that my spine would have snapped in half. No biggy but I thought a 6 point would prevent that. :(

Looks like another hole in the floor. Goodo. More than one way to lose some weight out of the car.

Roy Grand Master

Roy

Posted
Posted

If you tweak the harness lengths you can normally stop that from happening with a 4 point harness.

Also are you running the std seat, as most aftermarket seats will stop the lap straps from riding up. I find its best to never touch them. Move the seat back, do the lap straps only. Roll the seat forward as far as it goes using the rail to tighten the lap straps. Then click in the shoulder straps and tighten shoulder straps as required. Doesnt ride up at all

I hear what you are sayign about back injuries, seats and harnesses though...i share that same concern :blush:

Beer Baron Grand Master

Beer Baron

Posted
Posted

i just try to avoid crashing. it's worked so far. and yeah, as troy pointed out, harness with stock seat is crap. harness with bucket means the harness guides keep the harness lap belt nice and low.

djr81 Grand Master

djr81

Posted
Posted
i just try to avoid crashing. it's worked so far. and yeah, as troy pointed out, harness with stock seat is crap. harness with bucket means the harness guides keep the harness lap belt nice and low.

Well that was pretty much plan A - has worked a treat so far. The fact that the seat is too small & kills me by bruising the living @$%# out of my ribs & giving me back ache from no lumbar support is neither here nor there.

The problem is, like you say, that a standard or even reclineable seat with a 4 point harness sucks big time. On the other hand a fixed back with good hip bolsters & the holes to fit the harness doesn't work at all well with the standard belts.

Which pretty much leaves me up a well known creek.

post-5134-1176257072.jpg

irokin Contributor

irokin

Posted
Posted

How do the GP90s (XL, XXL?) compare with the Sparco Evo XL? I know the Evo XL fits me....but Id rather not spend that much on a seat Im gonna use once every few months. What about the Cobras in GT width?

Cheers,

Ben

Psymon Mentor

Psymon

Posted
Posted

When you say that, you mean the seat can still be in place but no one sitting there yes? That would work because i don't imagine i would have someone in the back seat at a track day! :)

Beer Baron Grand Master

Beer Baron

Posted
Posted

yep, seat can be in place, but no one can be on it. you will need to remove the seat to install the harness though, then put it back once installed.

  • 3 weeks later...
noone Experienced

noone

Posted
Posted

Stumbled across this the other day and seemed like a good option to me however it is designed for s14-15 but a similar idea might work for a skyline I thinks

Would stiffen up the car some too, was on ebay here:

http://cgi.ebay.com/ebaymotors/RACE-HARNES...sspagenameZWD2V

post-33041-1178194060.jpg

anyone seen similar for a line?

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