MX-5 OC Forum

well today i mocked up some seat rails just to see how things are set 

the washers are postioned where the seat (sparco sprint) bolts are

this is the best position for me as i am 6ft4

im kinda stock as what to do, i dont want to drill the floor :confused:

 Drill the floor and use big "repair" washers, and remove the  standard rear mounting

my thinking is this

the seat in an impact dosnt take the strain as i will be bolting a belt buckel to the trans tunnel .. so if i dont cut the diy raila at the rear bolts but leave 3 to 4 inches more so i can bolt on the seat .. like this the white is the rail contuned 

 In English?

If you do what I think you mean, the seat will be unstable. Although it is not under load in an accident, because of the belt, during cornering at speed it will move

i built a seven type kit car, had massive seat  mounts to satisfy the vosa inspection.

but thats only my opinion.  your ar*e is in the seat.

steve

 The seat belts and seat work together in an impact, if the seat is not securely fastened to the car the harnesses will not work as seat movement will allow slack,  the belts hold you into the seat so that the seat provides the opposing forcde (Newton's law and all that)you risk broken collar bones at the very least.

Ari Vartinenen's horrendous injuries in the Argentinian Rally were mainly due to the seat collapsing and breaking so the seat belts effectively went slack.

You will also need to put in big spreader plates for the seat belts to attach to unless you use the original mountings.

As essgee said it's your ar*se

the idea i had wont work after all as access is zero behind the seat 

so i am going to have to bolt the seat to the floor

what will i need to do now ?

Hey James, how did you get on?