Just got my 4-pt Schroth belts for my FD which I am installing with a roll bar and factory seats. Three of the attachments are snap in, but the lap belt on the inboard side is a bolt-in type. I'm assuming that this should be bolted to the same place as the factory buckle (attached to the seat, not the floor) but I wanted to be sure.

Can someone verify this for me? Thanks!

-ch

 

I don't know if this is some kind of kit just for the FD but usually you go to the floor with harnesses(or tunnel). That way you aren't relying on the seat staying put to hold you in.

 

This sounds odd...what do you mean by snap in? all harness points should be to the chassis not the seat.

 

I think by snap he means this type..

 

Chris,
You can use the rear bolt hole in the chassis for the seat belt retention bar... it's that rod that extends back behind the seat rail on that side. An eyelet will thread right in there. or if it will fit, you can use the rear seat rail mount bolt (though I think it's a different thread)

 

If you're auto crossing a 4 point harness is great but if you plan on doing any kind of high speed driving you'll need a 5 or 6 point harness to protect your good stuff behind your rib cage. The 4 point harness will rise up sliding the waist belt with it which won't be kind to any of your organs.

 

Hey, thanks guys for the help. I used the bolt in the back that Peter was talking about.

Fritz, I hear what you're saying, but I think the Schroth ASM 4-pt is better than the factory 3-pt. They've proven their anti-sub technology in real-world racing. (Essentially, the inboard shoulder harness expands by about 4" which moves your chest over the lower belt.)

That said, I may upgrade to a seat that has an anti-sub hole but I hate to give up the nice R2 seats!

-ch

 

You could always modify the seat to add a hole for the sub belt.

 

The 4 point Schroth harnesses are different.

They have a loop sewn into the inboard belt.

It releases on impact, preventing submarining.

http://schrothracing.com/products/streetlegal/1575

 

I just installed a set of these in my FD last month.

You have to take the seat out to install the inboard belt on the seat.
If anybody tells you different (as I was told) ask them for specific instructions.
Trust me, you have to remove the seat. Taking the seat out is 5 minute job.

You can attach the belt directly to the bolt that the stock belt is attached to.

 

Did you put the belt under or over the stock latch?

Thanks,

-ch

 

This is highly discouraged as the stock seat does not have any lateral stability. In a crash, the force of the anti-sub against the base of the seat can cause it to fail allowing unwanted movement. Schroth and other manufacturers specifically say not to do this.

That said, it's a free country.

-ch

 

Under on the passenger side, though I don't think it really matters.

The stock bolt is pretty big, both in diameter and length.

On the driver side I removed the stock belt.

BTW, if you remove the stock driver side belt, just leave the
the wire under the seat disconnected. The switch for the
driver side seat belt is normally closed, so disconnecting the
switch will make the ECU think the belt is latched.