I recently fitted a set of Reverie seats, Sector111 bar, and Schroth harness. I'm pretty happy with the results, and after trying various options for the sub strap anchors, I have what seems like a safe setup. Here are some shots and brief descriptions:
First, I wasn't satisfied with attaching the sub straps to the under side of the seat rail for reasons already discussed: the small size of the bolts holding the seats in. So, I went the same root as Sleepless and had Colin at Cantrell Motorsports fit an aluminum plate (3/16" I believe) to the under side of the tub. (See shots of Sleepless' car above to see what this looks like).
We started off using eye bolts as anchors for both the laps and subs, but the length of eyebolt + clip-in buckle on the Schroth Profi II 6H harness is greater than the space between the floor and the seat rail, so even under tension, the subs never would come taught to the anchors. Thanks to Joe and Matt at HMS motorsport (http://www.hmsmotorsport.com/
) for sending me the bolt-in version of the buckle (aka part "B24") that requires less space. Here is what they look like bolted in:
I'd like to take this opportunity to thank Matt and Joe at HMS and Colin Cantrell. They really went "above and beyond" by sending me various belts and fasteners to try until we found the right solution.
I selected the Reverie seats because they are very light, allow the proper angles for the harness setup, provide much better lateral support than the stock seats, fit me great, and look fantastic in the car!
Even without padding, I have sat for hours in these seats without being uncomfortable.
We had to widen the slot in the seat for the subs a bit to get them to 4 inches. Also, I was worried that the sharp edges on the seat would cut into the webbing on the harness, so my wife and I designed and sewed up a sleeve to protect the belt from the seat edges. Here are some shots of the sleeve cut out, fully assembled, and inserted into the seat. We used a tough "bullet proof" cloth for the sleeve and a stiff plastic piping around the edge to keep it from slipping down through the seat. This worked very well and inserts solidly into the slot.
Also, as discussed above, there is a sharp metal angle that the right hand, drivers side, lap belt rubs against due to the fact that the anchor on that side of the seat has to be back behind the seat. I ground this down to make it less sharp and intend to make another sleeve to protect the webbing there as well.
I am using the "race" harness bar from Sector111. Here is a shot of the drivers side setup. The car looks so cool without the passenger seat, I'm tempted to just leave it out
Next steps and additional safety mods planned:
1. Get a HANS and check fitment. The shoulder straps currently hit me just about right without modifying the strap holes, but once I get the HANS, we'll evaluate if the shoulder holes need to be closer together. Given the Schroth instructions, it is likely we will have to widen the holes so that the straps are closer to the recommended 4" apart at the bar without rubbing on the inside edge of the shoulder strap holes.
2. Shoulder pad. The only part of the seat that doesn't fit me perfectly is the upper shoulder area. The harness tends to pull me backwards, arching my back. I have mocked up a "wedge" pad that is about 10" high, 18" wide, and 2.5" thick at the top that not only is more comfortable, but will help create some space behind my head for the helmet and hans, hopefully avoiding the issues that Sleepless mentioned above. I plan to use confor-foam for the pad.
3. Fire supression system.
4. Electric cutoff.
5. Tow hooks.
6. Looked at the roll cage from hypersports, but it's too costly and too heavy (50lbs!). Maybe a petty bar??
I've never driven a car while in a harness, so this will take some getting used to, but I can't wait to try it out at the track. Maybe now I won't be honking my horn on sharp corners while trying to brace myself using the wheel
. Also, I've always liked the feel of hard breaking when riding as a passenger in a harness... so looking forward to that as a driver.