Originally Posted by Mahjik (Post 6922958)

Do you have a rollbar? If not, most people discourage the use of harnesses without rollbars.

I have used a 5-point on the stock seats without the cutout. It doesn't not provide the proper protection, but it does work.

Originally Posted by rynberg (Post 6923469)

M2 rollbar or just the harness bar?

If you aren't going to run the anti-sub belts, I would wear the stock seatbelts in addition to the harness (never a bad idea anyway).

Originally Posted by ArmitageGVR4 (Post 6923478)

That begs the question is a 4 point bar with no anti-sub any LESS safe than the factory 3 point seatbelt at the track?

Originally Posted by maxcooper (Post 4092022)

I've got a 6-point harness that I clip to the same eye bolts as the lap belt using the stock belt mounting holes. I put the sub straps through the space where the seat bottom and seat back meet and sit on them before they come up through my legs and attach to the bottom of the buckle/camlock. The sub straps are joined at the ends by a single plate that clips into the camlock.

The only thing I don't like about this setup is that it doesn't hold you as tightly in the vertical direction as a "straight down" sub strap setup would. Especially for short folks like me that have the seat more forward of the lap/sub belt anchors than a tall person would. But I believe the sub straps would serve their purpose in the event of an accident by preventing me from sliding out under the lap belt.

Note that the standard harness mounting eye bolts somewhat amazingly thread right into the stock holes -- I guess the seat belt bolt attachments are a federal regulation or something like that, hence the standard (non-Metric) threads.

-Max

Originally Posted by afterburn27 (Post 6925287)

I know a few guys who have 6 points with stock seats and they just run the anti sub belts off to the sides under your legs. It works well and isn't uncomfortable.

Max Cooper had this setup in his FD:



Here's the thread: https://www.rx7club.com/showthread.p...hlight=harness


Personally, I plan on running a 5-pt with my racing seat in the driver's side and keeping the stock seat with a 6-pt harness for the passenger. I know this is generally frowned upon by track officials, but my car is still a street car and not everybody can fit into a small racing seat. There are also some 'chunky' instructors out there. lol

Originally Posted by NO PISTONS (Post 6926364)

why would you keep the stock seats and run racing harnesses.

Originally Posted by NO PISTONS (Post 6926364)

why would you keep the stock seats and run racing harnesses. if your going to do that buy aftermarket seats and you dont have to go with expensive sparco seats apc makes really nice seats and with the cutouts

Originally Posted by ptrhahn (Post 6926460)

I tried running a 6-point with the sub straps running back through the split in the seat, and to be honest, it totally scrunched my nutz. I hated it.

With a stock seat, try a CG lock. I'm running one now even with my EVO, and I may just stick with it. I haven't bought a 5-point to try yet w/ the sparco, but I may not bother.

Originally Posted by ptrhahn (Post 6926592)

SPARCO EVO.

Originally Posted by NO PISTONS (Post 6926364)

...apc makes really nice seats and with the cutouts

Originally Posted by Mahjik (Post 6926388)

Fitting aftermarket seats into a 3rd Gen is not day in the park. Also, most people don't have dedicated track cars, so they want to have seats they can be comfortable in on the streets as well as being "held" in driving position on the track using a harness. There are trade-offs you have to manage when making the car dual purpose (street/track).

Originally Posted by rynberg (Post 6926671)

Please feel free to stay in the ebay section instead of the race tech forum....

Originally Posted by NO PISTONS (Post 6930162)

Well fitting aftermarket seats in the drivers side isnt hard but putting one in the passenger side well thats a different story:icon_no2: that can be difficult

Originally Posted by Silkworm (Post 6931374)

Out here, last I checked, NASA requires that if you run race safety equipment, you're required to have all of it. So run a harness, you better have a roll bar and seat back brace. Maybe that rule has relaxed lately, it's been about a year since I've been out there.

in any case, I'm 100000% sure they will not allow you to run harnesses without a correctly installed anti submarine belt(s). Don't even waste your time asking them.

Originally Posted by afterburn27 (Post 6932745)

The last part is true, although I have seen some people slip by with four points. Rare though...

And they like you to have a rollbar if you are running a harness and vice-versa. They do not require a seat back brace as far as I know.

This is for HPDE events BTW. (I work for NASA)

Originally Posted by jkstill (Post 6933316)

How does NASA view the Schroth 4 Point belts with ASM?
ASM = AntiSubMarine

Schroth sews a loop in the inboard harness strap. This is
used to prevent submarining.

http://schrothracing.com/products/streetlegal/1611

All rather academic for me, as there are no NASA events in Portland OR that I am aware of.