Join Date: Jul 2009
Location: Southeast Michigan
Wear it for a couple track days and see what happens. The buckle will ride up past your pelvis no matter how tight you cinch it. If you hit anything that causes you to move forward there is nothing to prevent you from submarining underneath. The Schroth tearaway claims that the outer belt will stretch and allow your torso to go forward a bit, like a traditional 3 point belt. So maybe it works. And maybe not.
The chances of getting actually injured in a track day are pretty small, so I'm not hugely surprised if you haven't heard of anyone actually getting injured by a 4 point. Let's hope it stays that way. Enough people who have done this for a long time would never use a 4 point that I became convinced.
Aside from all that, once you go to a 5 or 6 point you will realize that the only real utility out of a harness is to use it with a 5th or 6th point, since it actually keeps you in the seat. With a 4 point once the buckle wriggles up it's fairly useless at the task of keeping you tight, and more importantly keeping your butt tight to the seat.
It's not a big job to get the remaining strap. You need to get a slit in your seat to thread it through and a good attachment point in the floor. Sector 111 sells a kit to do that. A pro race shop that is at all familiar with Lotus can do it for you in a few hours, or custom make a good bolt system. The slit in the seat can be trimmed by a leather shop so it looks OEM or for a few bucks Sector 111 sells a plastic harness hole ring. I don't think it's hugely comfortable, so after a year of using that I went the leather shop route with the same seats you have.
[SOLD] 2005 Lotus Elise, NFB with orange trim N/A+ Nitron DA's+gPan+little tiny Odyssey battery++ Lotus Sport seats+ DBA 5000's/Stainless++Lotus Sport wheels ++ V2 stuff like gas tank, arms ++Track pack harness bar/6pt++2Bular GT3 and sport cat++ quick release and a few steering wheels++ custom rear delete++ Magical Racing mirrors with custom mounts ++ RTD brace ++ toe link upgrade++ other little stuff