From what I've read, going into the seat rail point isn't a good idea. That point is fine for the stock 3 point belt, but a 3 point also allows you to move around during a crash with the airbag "catching" you, so it's not taking ALL of the forces in a crash. Plus on the track there's always the possibility for a crash to be much worse.

 

Is this just speculation? Has anyone load tested an eye bolt with backing plate in the tunnel? IMO if Honda chose that location for the stock lap belt, then I do not see how it would be insufficient for a harness lap belt, it wouldn't absorb all of the forces in that configuration either you have both sides, subs and shoulder belts. Actually I would think that it would experience less force than it would when used with a 3 point.

I'm not taking sides, I'm simply posting the question so that I can arrive at the safest solution.

 

I have to agree with jcbarnard in this situation. Even with the 3-pt factory belt, all of the force of your lower half will be transmitted to the lap belt. The airbag and twisting only comes into effect on the upper torso.

In other words, the force transmitted to the lap belt in both cases should be more or less equal. And since the factory mounted the inside lap belt to the seat rail, I saw no problem doing it with the 6 pt, especially since my Bride Seat Rail had provisions for it.

Obviously the shoulder portion in a 6 pt will take much more strain over the factory setup, hence the need for properly mounted harness bars.

 

jcbarnard, if your running 6pt harness you shouldn't really have them hooked up to OEM seats (so why do you ask about the oem rail as a mounting point?). Of course they CAN be hooked up with a shoulder strap tensioner or whatever it's called so the shoulder belts don't fall down off your shoulders (because there are no holes). And there isn't a hole for the substraps to be attached so your now looking at a 4pt which brings submarining into it and thats a whole other discussion.

best case scenario, buy a FIA approved race bucket and mount 6pt to eyebolts. I see no problem with having bolt in and attaching to the OEM seat rail anchor points to the body but those probably aren't appropriate angles to have the belts resting.

FYI, I just bought two 6pt sparco clip in harnesses from JRP in Mississauga. The harnesses come with eyebolts (6 in each box) so just fab up some backing plates and put them all into the body and be done with it. Thats what i'm doing.

 

Honda pretty much HAD to choose to mount the belt to the slider, because otherwise the sliding seat does not work with 3-pts.

 

^ Well that makes a lot of sense. Thanks for the info guys.

Obsession, I will not be using OEM seats and plan on using a 6 point belt, roll bar with harness bar and Hans. Regardless of the harness, something I want to do is retain the 3 point belt running through the lap holes in the bucket seat. I know very little about seat/rail mounting, but I'm assuming from your post that it's not common for bucket rails to to have an anchor point for an OEM buckle? This is a different topic entirely I guess and something I never thought much about.

 

actually I think it is common. I know the buddyclub super low down rails I have (for a bucket) DO have the an OEM attachment point. If i'm not mistaken, there is one on each slider so I guess YOU COULD mount the lap belts to that, but I don't know that I would want to

read up on rollbars though. It's not recommended to use the 3pt system with a rollbar.... heavily debated topic.

jc, whats your location? I'm in Cambridge. You should stop by and see my set up. Just getting it put together now. The seats I got are Sparco sprints and i'm having a heck of a time mounting them in the car.

 

[QUOTE=s2kobsession,Dec 17 2008, 12:54 PM] read up on rollbars though.

 

I ran the factory 3 point with my VIOS III seats for a few weeks. It was an absolute nightmare trying to fish out the OEM belt receptacle from between the seat and center console. With the huge bolster, it's really buried and almost impossible to reach.

I just use the 6 pt all the time. It takes an extra 20 seconds to buckle. It's really just a pain for the passenger (has to adjust size every time passenger changes, may not be used to it).

 

This is exactly what I want to do. Except I would run the lap belt through the seat hole if it didn't sit tight enough around me going over the sides.
https://www.s2ki.com/forums/index.php?act=m...&img=76202&md=1

I have no plans of changing anything on the passenger sides, and I also would not run a harness on the street it's just not an option for me.

Judging by the picture, I don't see any reason why that solution won't work for me and allow me to run either belts when needed. After track days, I can simply disconnect the 6 point and leave it behind the seat.