Harness mounting points and rollcage cross bars

Just after some advice on the harness mount points for a mk1

Whats your thoughts on these harness bars on the cages









This is how I dont want to bolt them

 

hi mate been thinking the same thing . i have been told that if they are too low you could snap the seat !

i will prob end up mounting them on the floor tho as im lazy

 

The green car is the accepted 'Clubman' fit, which is what you're after Craig. Two eye bolts into the rear seat belt mounting points below the rear seat squab area.

The yellow car looks dodgy, because they're bending over a tube behind the drivers seat. Unsure.

 

Yellow car = no pp Chris`s point

White car = no, too high

Green car = OK as long as it`s right through the `double skin` there, two of those points are not standard are they ?

If the white car`s cross bars were lower then that`d be ideal.

My own car - has always passed scruitineering for hills / sprints and trackdays but Ian Carvell made the point that it`s probably not OK for racing as the harness bar is effectively bolted to the shell at the rear arches .. and may pull out under impact - if it did I think I`d be dead before that !

 

just right.

http://vwinbits.fotopic.net/p42948331.html

edited as fotopics being an ****. and again! :@

 

Neat ..... what`s the distance from seat to harness bar please ?

 

can't remember. but it's just close enough so i don't need to cross the harnesses over. if i remember right you need to do that for anything over 70cm from the back of the seat.

 

Thanks ... was not aware of the crossover `reg`?

 

I'm sure I've heard the opposite? - unless it related to the double-to-single rear straps, which are now non-MSA compliant..

 

sure it was in the trs instruction manual. if length between seat back and wrap over of the harness was to be over a certain lenght then the straps should be crossed over.

i could be wrong though.

 

Looking at a diagram in the Willans guide it shows the tail straps crossing by means of the supplied `buckle` ..... I`ll dig out the full instructions tomorrow as I`ve always deleted this `buckle` ?

 

buckle rings a bell. think i've got them rattling about the boxes still. will check instructions when im at the unit tomorrow.

 

Couldn`t wait ...



Quote Willans:

"Do not modify this harness"

It came with the tail straps already crossed in the `buckle` hence I`ve modified it !

" The twin tail strap crossover point should be positioned approx. 12" (300mm) behind the seat back and should not be able to contact the seat or any other part of the vehicle hardware when the harness is in use.

Looks like I`m putting the `buckles` back on

Have never been picked up at any scruitineering though ...

 

mine was wrapped around the cross rear bar on the cage. I would not drill a cage tube personally...
My new cage is having 2 small cross pieces inset having spoken and delivered the car this morning to CC between the X bit and the side tubes.

they're also fitting me the seat rails -

 

Looking forward to seeing your cage etc. Bill, how long will it take ?

My harness bar although drilled has the threaded `sockets` welded into the tube.

 

they want the car for 3 weeks.. took it there yesterday and the place is stacked full of cars being done.. busy as hell..

sockets.. good idea.. proper job. I loop my harness over the bar, removed my eyelets on mine.

 

on that green car the belts should really be crossed over. I have mine like that.

I have used the original seat mouting points as these will have had to have been tested and passed regs meaning they should withstand X Kn of force (im not 100% sure on how much, as its dependant upon the seat wieght etc and thats not my dept at work...) if you are mouting to the roll cage then be aware that the cage will have to be securely fitted, idealy welded in and with good spreader plates etc.

Unless you are entering propoer racers I would just use the original mounts ala the green one and so long as you have a good seat, ie FIA approved and you are within the 45deg limit you will be ok i would have said

 

if the yellow car was mine i would of taken the clip of the belts and looped them around the roll bar behind the seat

 

I always thought that if you had harnesses just bolted to the floor, in an impact, the force could snap the seat back and YOUR back

With the std inertia belt, you have a high mount above your shoulder, using the green car, all the mounting points are on the floor, which if you tighten them will pull towards the floor, crushing anything inbetween ie. you.

A shoulder height cage harness bar is surely better ?

 

Yep thats right Nige because of the force pulling down instead of holding you back into the seat, we always fit level harness bars and also a must if using a Hans device.