Harness Install

[dialp911]

I have a 1992 C2 Coupe that I want to install my 5 point harneses in and I don't want to drill holes through the floor any ideas on mounting these without drilling for the lap belts and the sub belt ????

Thanks Steve

[dad911]

Do you have a racing seat (with the openings)? If not, it is probably not a good idea to install harnesses. They can come off your shoulders with the high-back Porsche Seats. Harness manufacturers have pointed this out in the installation manuals, and many PCA regions are changing rules to reflect this for DE events.

The other problem is the electronics stuffed under the seats where the holes need to be drilled.

You may be better off with 6 point harnesses.

[craig001]

Second the post above, but you can buy a BK, Sparco, or Weltmiester Harnass Guide Bar and use the stock seats. BK makes the adapters for both bolt in and quick release set-ups that install into stock locations. I don't think that our host sells them, but I know a couple of Rennlist sponsor do. If you go to the BK website they have links to distruibutors. Kelly-Moss and OG Racing come to mind right now.

[dialp911]

I have the harness bar installed and used a BK harness bar in my prior car... My real concern is to mount the lap belts and the sub belt without drilling through the floor boards... I was hoping to find a brace that would mount under the seat that I could attach my eyehooks to and thus clip my harnesses to... or almost any other option that would not require drilling through my floorboards... (This is a much nicer car than my last one)

[craig001]

BK makes QR clips for both sides of the seats. That's what I have.
BK Tunnel Side Mount , BK Outside Belt Mount. These bolt in fairly easily. For the sub strap the guy I bought my stuff from fabbed up a set-up out of aluminum angle and an eyebolt.

[dad911]

Originally posted by craig001
Second the post above, but you can buy a BK, Sparco, or Weltmiester Harnass Guide Bar and use the stock seats. BK makes the adapters for both bolt in and quick release set-ups that install into stock locations. I don't think that our host sells them, but I know a couple of Rennlist sponsor do. If you go to the BK website they have links to distruibutors. Kelly-Moss and OG Racing come to mind right now.

Harness manufacturers actually disaprove using harnesses with high-back porsche seats - http://www.schrothracing.com/docs/Competition_Instructions.pdf

[dialp911]

I am getting new seats as well, I am looking at the corbeau seats

What I am hoping to do is fabricate a piece of angle iron to bolt through the seat Frame holes that I can put three eyehooks into on for each lapbelt and one for the sub belt...

Anyone think this is a bad idea ????

[Don Plumley]

Ultimately it's your personal safety and what you feel comfortable with (any GCR's notwithstanding). For me, I'm not comfortable using seat mounting hardware for seat belts - it's a single point of failure. If I'm in a bad crash and my seat rips out from the floor, I don't want my seat belts coming out then too. Yes, I know that factory belts often attach to the seat.

For the lap belts, why aren't you using the stock belt mounting points? You can use rated eye bolts with longer shanks to preserve the stock belt mounts. The problem with using seat frame holes is the angle of the belt. Have a look at the Schroth installation guide (online) and see what they recommend.

For the sub belt, there are braces that attach to the seat frame holes (under the rails) and provide either a one or two position mount. The trick is to get it far back enough - you want at least 20 deg from vertical.

[Tom W]

Sorry for the urge to rant but ... Yes, I think it's a bad idea.

I will never understand the desire to take a car to the track, but not want to drill 2 holes in the floor pan. You'll risk your life and your car by crashing into a wall but worry more anout potential resale value than your safety?

You can do what you want for most DE groups (PCA being a big exception) but no racing organization feels that attaching it to the same spot as the seat is a good idea. No harness manufacturer (that I'm aware of) thinks that what you are describing is a safe way to mount the belts either.

While a lot of thought and engineering has gone into the belt design, you want to throw it all out the window by using some soft iron in a situation where strength and integrity are required. The force of decelerating your weight plus the seats weight at (potentially) 20-50 g's is substantial.

Use a proper race seat and drill the two 5/8" holes in the proper spot(s) for the sub-belt you will use. Use the proper eye bolts and backing plates. When you want to sell the car, remove the bolts put some new rubber down and seal it with silicone and put the carpet back on top.

That's my $0.02. Please don't take the response personally, it's meant in general and simply reflects my views to the question you asked.

[Don Plumley]

Tom was more direct than me, but we are in violent agreement.

[Tom W]

I get into trouble by being too direct at times.

[dialp911]

I have decided to drill the holes in the floor

Thanks for all the help.....