How many people are running seat belt harnses in a 2+2?

 

How have you done it?

 

Are you still able to get people in the back seats?

 

Was it worth it? and why?

I've had harnesses (up until the mot when they told me they had to go)

 

I used a couple of places really but not were ideal for people in the back.

 

There's two places best for mounting them up:

 

- cut out the covers over the rear three point seatbelt holes up behind the rear quarter windows, best place for getting a straight line at the back of the harness but cuts out people's headroom in the back and you have to unclip them to let people in

- bolt them into the centre where the clips go for the rear lap belts which means people can still get in out of the back without having the unclip and reclip the harness back in place

I've had harnesses (up until the mot when they told me they had to go)

 

I used a couple of places really but not were ideal for people in the back.

 

There's two places best for mounting them up:

 

- cut out the covers over the rear three point seatbelt holes up behind the rear quarter windows, best place for getting a straight line at the back of the harness but cuts out people's headroom in the back and you have to unclip them to let people in

- bolt them into the centre where the clips go for the rear lap belts which means people can still get in out of the back without having the unclip and reclip the harness back in place

 

If that means having the harnesses bolted low down then its dangerous.

 

I recently fitted a cheap set, Im looking to purchase some better branded ones in the future but for now these were a guide to see if i could in fact fit them which i could.

 

Silverbullet has a set of harnesses fitted on a harness bar. which is welded in the same part of the chassis as mine.

 

 

Heres what i did, it may not be the best way or safest way but it works. (ideally you should use a harness bar connected to a roll bar)

 

The inside seatbelt clip which is connected to the seat rail can be removed and a eye bolt bolted in its place its that simple. BUT you can no longer use the original seatbelt.

 

 

For the outside front point there is actually a plate already welded in the jap spec models and also the uk spec as the seatbelts were mounted there on uk specs but the jap spec also has the plate there also, so i pulled back the carpet and found the threaded hole, i then put the carpet back in place and made a hole through it with a screwdriver and screwed in another eye bolt.

 

 

 

The most complicated bit is the rear point :(

I took apart all the rear interior panels to get to the rear suspension turrets, Just in front of the turret i drilled a hole for the eye bolt then temporarily put the eye bolt through the hole and screwed it into a plate (which i bought separately) which has not been welded in place yet, i did this so i had a guide to weld the plate in place so i marked it up and welded a quick guide spot till it was stuck in place then i unscrewed the eye bolt and finished the welding (poorly my welder and skills are not great :() remember the strength from comes from the chassis not the welding as the plate is inside the turret so when all the force pulls on the plate it has to rip straight through the chassis through the other side. So even if i only welded one spot on the plate its still effective but obviously better to weld in on properly.

 

 

 

 

 

Whatever you do, DO NOT fit the rear point in the rear back seat belt thread holes, this is deadly and can crush your back in a head on accident.

I've had harnesses (up until the mot when they told me they had to go)

 

I used a couple of places really but not were ideal for people in the back.

 

There's two places best for mounting them up:

 

- cut out the covers over the rear three point seatbelt holes up behind the rear quarter windows, best place for getting a straight line at the back of the harness but cuts out people's headroom in the back and you have to unclip them to let people in

- bolt them into the centre where the clips go for the rear lap belts which means people can still get in out of the back without having the unclip and reclip the harness back in place

 

Think i know where you mean.

 

I have a carbing rear strut brace at home and was thinking of attaching them to that but that would mean a no no to rear passengers.

 

I will check these places thanks.

 

Anyone else any ideas?

 

Pics would be great so i could see for rear passenger room and for fitment.

If that means having the harnesses bolted low down then its dangerous.

 

I recently fitted a cheap set, Im looking to purchase some better branded ones in the future but for now these were a guide to see if i could in fact fit them which i could.

 

Silverbullet has a set of harnesses fitted on a harness bar. which is welded in the same part of the chassis as mine.

 

 

Heres what i did, it may not be the best way or safest way but it works. (ideally you should use a harness bar connected to a roll bar)

 

The inside seatbelt clip which is connected to the seat rail can be removed and a eye bolt bolted in its place its that simple. BUT you can no longer use the original seatbelt.

 

 

For the outside front point there is actually a plate already welded in the jap spec models and also the uk spec as the seatbelts were mounted there on uk specs but the jap spec also has the plate there also, so i pulled back the carpet and found the threaded hole, i then put the carpet back in place and made a hole through it with a screwdriver and screwed in another eye bolt.

 

 

 

The most complicated bit is the rear point :(

I took apart all the rear interior panels to get to the rear suspension turrets, Just in front of the turret i drilled a hole for the eye bolt then temporarily put the eye bolt through the hole and screwed it into a plate (which i bought separately) which has not been welded in place yet, i did this so i had a guide to weld the plate in place so i marked it up and welded a quick guide spot till it was stuck in place then i unscrewed the eye bolt and finished the welding (poorly my welder and skills are not great :() remember the strength from comes from the chassis not the welding as the plate is inside the turret so when all the force pulls on the plate it has to rip straight through the chassis through the other side. So even if i only welded one spot on the plate its still effective but obviously better to weld in on properly.

 

 

 

 

 

Whatever you do, DO NOT fit the rear point in the rear back seat belt thread holes, this is deadly and can crush your back in a head on accident.

 

Thanks for that. interesting...

 

Also you have removed your rear seats, i just posted a topic about that

 

look... :D http://www.300zx.co.uk/forums/showthread.php?t=124487

yes the rear seats are gone, and good ridence to them, no one fit in the rear anyhow, and it looks far better now, as long as you lay some carpet down where the seats would have gone.

J1mmys's harness fitment is pretty good, the best I've seen without a Cage.

 

Do NOT whatever you do fit them to the rear seat belt buckle holes.....it is extremely dangerous and will crush your spine in an accident. They need to be fixed as close to shoulder height as possible.

ouch i wouldnt want that.

 

I will give Jimmys a try.

 

How about taking it off the rear strut brace maybe? I would imagine mine is the same height as Jimmys

 

This is a picture of my brace where it attaches to the suspension. maybe take is off that hole visible in the pic. The one above the welded seem on the left.

 

ouch i wouldnt want that.

 

I will give Jimmys a try.

 

How about taking it off the rear strut brace maybe? I would imagine mine is the same height as Jimmys

 

This is a picture of my brace where it attaches to the suspension. maybe take is off that hole visible in the pic. The one above the welded seem on the left.

 

 

Not sure about that tbh...... its not designed to take impact forces in the direction a harness would put on it.

 

This is what you want where J1mmmy has bolted it to the rear strut area :

http://cgi.ebay.co.uk/Harness-eye-backing-plate-FIA-approved-x-3_W0QQitemZ370184905140QQcmdZViewItemQQptZUK_CarsParts_Vehicles_CarParts_SM?hash=item370184905140&_trksid=p3286.c0.m14&_trkparms=72%3A1689|66%3A2|65%3A12|39%3A1|240%3A1318

 

make sure you get a set that are built to FIA approval

you could have the actual harness strapped around the strut somehow like in a proper rally car where they are looped around the harness bars. I think... im going to look for an rally car interior picture now :D

 

I bought the plates from demon tweeks, cant go wrong really, my eye bolts came with the harnesses. Harnesses have an approved mark on the label somewhere, dont know if they are authentic though

right i think i know what they do now. Either attached to the roll cage/harness bar, or attached to points in the floor of the chassis but the straps are looped over a horizontal bar so they dont crush you when under tension. like this:

 

 

 

here i think they have bolted the eye bolts to the bar.

Edited April 14, 200916 yr by j1mmytt

heres another one :D

 

so you could weld in a bar somehow and fit the harness into the oem rear seat belt points then over the bar and through the seat. Hmmm i wanna do this now....

Why not got for a rear 4 point cage. You get the harness bar built in but with the benefit or improving chassis rigidy which improves handling. Plus a rear 4 point cage is unobtrusive to the seating area in the front.

I was looking at Takata harnesses but.. they have two bits which come out the back of the seats and stay as two instead of joining back as one. How would this work?

 

 

I was looking at Takata harnesses but.. they have two bits which come out the back of the seats and stay as two instead of joining back as one. How would this work?

 

 

 

Thats a 4 point harness (the most common style) , most aftermarket seats have 2 seperate slots above the shoulders so this is the style needed.

 

eg.

 

 

 

You can still fix them to a single mounting point together.

Edited April 14, 200916 yr by Yowser

oh right so bascially you dont need to join the two points back up just connect them both to the same mount point.

 

Has anyone fitted these to stock seats? as i cant have aftermarket seats with stock belts but i could run harness with stock seats perhaps. I will do it all at some point but tackle one at a time as and when i can afford to.

right i think i know what they do now. Either attached to the roll cage/harness bar, or attached to points in the floor of the chassis but the straps are looped over a horizontal bar so they dont crush you when under tension. like this:

 

 

 

here i think they have bolted the eye bolts to the bar.

 

That is a pretty nifty idea, i could take them back to the trut bar then down the back of it bolting into the boot. however the harness may not be long enough.

That is a pretty nifty idea, i could take them back to the trut bar then down the back of it bolting into the boot. however the harness may not be long enough.

 

Thats what i mean, you can loop them over the strut then back down and into the stock rear seat belt points. dam why didnt i do that......

J1mmys's harness fitment is pretty good, the best I've seen without a Cage.

 

Do NOT whatever you do fit them to the rear seat belt buckle holes.....it is extremely dangerous and will crush your spine in an accident. They need to be fixed as close to shoulder height as possible.

 

I never liked the harnesses as safe as they should have felt they never felt right to be hence i went back to series 1 door cards and standard belts.

 

To keep the rear seats in they are the only two places you can attach the belts unfortunately. The top three point harness holes hidden behind the facia are the safest places to bolt and still fit people in the back as far as i'm aware. Up high and pretty straight but ideally as stated you need a rear strut brace to get them dead centre and the right height

3 point harnesses can be fitted through seats with two holes too lagrath because the join is behind the seat

3 point harnesses can be fitted through seats with two holes too lagrath because the join is behind the seat

 

good point, I was being a bit thick there lol

Ahh very true :D

thats how mine are :D

Thats what i mean, you can loop them over the strut then back down and into the stock rear seat belt points. dam why didnt i do that......

 

there may be a problem there though as the strut brace is further back than the seat belt points so after it has gone over the rear strut brace would have to come back on its self.

 

not sure on the length either as that is a much longer route.

there may be a problem there though as the strut brace is further back than the seat belt points so after it has gone over the rear strut brace would have to come back on its self.

 

not sure on the length either as that is a much longer route.

 

measure it, my harness has enough length to touch the rear plastic trim.

Hi guys, would like to offer some advice regarding the fitting of your seat belt harness, either before prefrerable or at least after you have fitted them get along to some sort of race meeting and see if you can get one of the scruterneers to check what you have done, these guys can be a total pain in the arse at a meeting, but they save lives, and I'm sure they would be more than helpful.

 

Paul