Four or Five point seat belt install??
11-26-2011, 01:21 AM
#1
Racer
Thread Starter
Four or Five point seat belt install??
Has anyone done an install of a four or five point harness for a 997 S coupe?
I did an install on my previous car but it was a pretty easy and straightforward installation but I suspect it would be a much larger and more complicated effort.
No roll cage..
I did an install on my previous car but it was a pretty easy and straightforward installation but I suspect it would be a much larger and more complicated effort.
No roll cage..
11-26-2011, 03:09 AM
#2
Rennlist Member
Join Date: Dec 2009
Location: Southern California
Posts: 1,429
Likes: 0
Received 15 Likes
on
15 Posts
Five-point requires a hole in the seat. You can't run it over the front cushion of the stock seat. Probably for the same reason, but I've never inquired. Clearly, a man would just as soon not build up momentum sliding under the lap belt for ten or twelve inches before the crotch belt takes the weight. I like to ... uh, arrange things around that fifth belt while in the pits and the "hole in the seat" rule has that benefit even if it isn't their explicit intent.
Either type requires at least a harness bar of course. Someone noted recently that survivable accidents with a roll cage or with ordinary belts can leave you relatively dead if you're held upright by a five-pointer and end up using your spine as a roll bar.
The four-pointer that permits upper-body motion would solve that last problem, and it is more effective than a stock three-point belt, though not all could we wish.
If no one responds with personal experience I'll dig up the supplier I was considering for this purpose. They have a good website that discusses all these issues.
Gary
11-26-2011, 03:36 AM
#3
Race Director
I installed a 6 point Schroth harness in my 997.2 S. I use a Brey Krause harness bar and a Brey Krause sub strap mounting bar under the drivers seat. My seats are the 997 GT2/GT3 sport buckets with the pass throughs in the bottom cushion and in the seat back. Installation was straightforward; you just have to remove the driver's seat to mount the sub strap bar. Brey Krause makes a couple of styles of harness bar. If you have a Bose system like I do, you need to use the harness bar designed for the Cab. Clearance is close between the support bar and the seat backs on the sport buckets with the seats all the way back, but there are no issues with contact.
Gary's points about safety, harness bars versus roll bars, and mounting of the sub belt, are valid. Also, as you're no doubt aware, the shoulder belts shouldn't be routed around the seat back. As an autocrosser, I'm not too worried about rolling my car, so my belts are mainly to keep me located in my seat. If I were going to track my car on a regular basis, I'd go with a real roll bar.
http://bkauto.com/porsche/r9032.php
http://bkauto.com/porsche/harness_mo...es_porsche.php
Gary's points about safety, harness bars versus roll bars, and mounting of the sub belt, are valid. Also, as you're no doubt aware, the shoulder belts shouldn't be routed around the seat back. As an autocrosser, I'm not too worried about rolling my car, so my belts are mainly to keep me located in my seat. If I were going to track my car on a regular basis, I'd go with a real roll bar.
http://bkauto.com/porsche/r9032.php
http://bkauto.com/porsche/harness_mo...es_porsche.php
