Seatbelts

Makesy

Club Member
Hi guys,

I've seen a few bits on the forums about using Securing inertia belts but I'm getting a bit stuck on how to fit them.

One of my Z's has lapbelts, and the other is in pieces, so I don't know how it once looked.

I'm after a modern, safe upgrade to inertia belts and the best way to do it (preferably with pictures if anyone has any?)

Thanks in advance
 

Texasroadrunner

Club Member
I didn't like my original lap belts on my '72 since they were very worn out and the shoulder harnesses were missing. I decided to try some inertia belts. I found these on Ebay and they are the correct length. Click Here I did have to make extension brackets that bolt from the original threaded hole in the stock recess, that locate the new retractor higher since I doesn't fit in the stock recess. I do like having retracting harnesses. It was worth the price and the effort.
 

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Kieronpollock

Club Member
I’ve just installed the Securicon seat belts into mine using the original fitting points. Bolts were a faff but mechanic found suitable alternatives that worked. Faff is about setting up the dials on the mechanism so it releases easily
 

Makesy

Club Member
I’ve just installed the Securicon seat belts into mine using the original fitting points. Bolts were a faff but mechanic found suitable alternatives that worked. Faff is about setting up the dials on the mechanism so it releases easily
Thanks @Kieronpollock .

Which securon model did you use?

Could you take some pics of the install please? I'm flying blind as neither of my Zs has proper belts in :(
 

Makesy

Club Member
I didn't like my original lap belts on my '72 since they were very worn out and the shoulder harnesses were missing. I decided to try some inertia belts. I found these on Ebay and they are the correct length. Click Here I did have to make extension brackets that bolt from the original threaded hole in the stock recess, that locate the new retractor higher since I doesn't fit in the stock recess. I do like having retracting harnesses. It was worth the price and the effort.

Thank you. Really useful info!
 

Texasroadrunner

Club Member
Thank you. Really useful info!
The nice part is all the factory mounting hole locations and bolts work. I think I added some washers and longer bolts to the rear mounts by the hatch so they would pivot freely without binding. Almost looks like original equipment.
 

Sylv1

Club Member
Prefer systems that are designed to work without airbag if you can

Indeed torsion bar inside the system limits the stress on the belt in case of crash. Rate of torsion bar depends on the compromise between braking your body inertia to lower the intensity of crash on the dashboard and injures on your thorax due to belt.

In case of airbag, torsion bars are usually 450daN rated to let you land in the airbag which finishes to stop your beloved body.

In case of no airbag, rate is usually 600daN to avoid your head to approach the dashboard (even if dashboard is digital, the knock is not 😂) but causing more harms on the thorax


While saying that… crash protection by an old Z body is so poor that rate of seatbelts is probably not a prime criteria…
 

grb184

Club Member
Hi all. Looking to replace the fixed seatbelts in my 260z which are mounted on the rear strut towers. I have to set the seat quite far back due to my… how can I put it..rather portly stature

Looking for some inertia belts and fittings that will attach to the rear strut towers as the captive nut is not there on my c pillars. Any suggestions?

Thanks

Graham
 

Kieronpollock

Club Member
I started without any fitted and my belts were in very poor condition so I just have the two ‘female’ mechanisms going spare
 

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Skallywag

Club Member
I’ve just installed the Securicon seat belts into mine using the original fitting points. Bolts were a faff but mechanic found suitable alternatives that worked. Faff is about setting up the dials on the mechanism so it releases easily
Hi Kieron,
good post on seat belts, and I'm glad I caught it as I'm going to be upgrading my original lap belts. Did you have any issues fitting these to the car on their original mounting points?
 

Robotsan

Club Member
I started without any fitted and my belts were in very poor condition so I just have the two ‘female’ mechanisms going spare

Any idea if these would work with a 280z? My driver's seatbelt won't stay in the receiver. There's no 'click' when pushing it in. So just thinking it might be worth me trying these!
 

jonbills

Membership Secretary
Staff member
Site Administrator
Any idea if these would work with a 280z? My driver's seatbelt won't stay in the receiver. There's no 'click' when pushing it in. So just thinking it might be worth me trying these!
I expect the receiver is full of crap. take it off and shake it out?
 

johnymd

Club Member
I have fitted the securicon belts to at least one car. The issue I had was with the mounting point for the fixed receiver. The body mount hole is at an angle to the direction of pull so I tried to bend the securicon mount end to suit this angle. The end snapped of very easily!!!. So I made small extension from thick steel that has a bend in it so the securicon receiver pulls straight. If you just bolt it down to the existing mount hole I feel it may just snap off in the event of an accident.

Just something to think about. Always consider the direction of the load in an accident and what stresses are placed.
 

Robotsan

Club Member
It did occur to me after I sent that that maybe I could take it apart .. it didn't occur to me that it might just have crap in it though! Thanks .. will investigate!

Well I took the receiver off, but I can't see any way into it?! Seems riveted shut.

Also couldn't see a way of disconnecting the wiring for it. There's no plug to pull out, and the wire just goes all the way over the trans tunnel and to the other seatbelt and beyond.

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