If Sparco said they were designed to be used with the stock belts, then I wouldn't worry over-much at all. Maybe I was looking a the wrong seat, but when I googled "Sparco Fighter," I got pix of a typical high-bolster race-type shell with belt guides fairly low in the bolsters. Maybe I got bad info. If so, my apologies for kinda pushing the panic button... Is this the seat? Also, note the belt routing...
You are going to LOVE how well connected you are to the car. You'll start feeling the car doing stuff you didn't even know was going on before...
Okay, let's clean up a few misconceptions here... When you put a car on a race track, ANY race track, in ANY run group, you are assuming a risk, both of material damage to the car, as well as possible bodily injury. Those are just the simple facts, i.e. "That's just the way it is." Yes, in the "lower" run groups (HPDE) you can mitigate risk to a much higher degree than in the full-on competition groups (TT and W2W), however that risk is still there. In 2011, I was in three on-track wrecks (a singularly BAD year for me in that respect!). One in HPDE-1 (instructing), and two in HPDE-3/4 (instructing one, driving the other). Last year, I was in two near-miss incidents (two students, same car, no high-HP experience, but lots of LeMons time in a 110HP FWD shitbox) both in HPDE-1.
Since I got my Comp license in 2011, I've been in body-contact impound precicely ZERO times, running in CMC, 944SPEC, PTB, ST-3, and Enduros. And yes, during that time, I've taken home hardware and set track records on more than one occasion, so I'm not exactly "taking it easy" out there...
Bottom line is that "track days" are not automatically safe, and racing wheel-to-wheel does not automatically equate to crashing. W2W adds the extra risk factor of close-proximity driving for extended periods of time, but ALL are subject to the vagaries of mechanical issues. Tire failure, brake line rupture, cracked brake rotor, failed balljoint or tie rod, debris on the track (including rain and/or antifreeze and/or oil); all can conspire to put your car into jeopardy with you in it... To say nothing of the OTHER GUY that screwed up and collects you.
Safety is, at least for me, a MAJOR priority for any on-track car. I would personally like to see a rollbar/seat/harness/HANS requirement for ANY open-passing group, but from a marketing standpoint, that would be a hard sell...
The MM roll
bar is a work of art. Philostang has one in his TT car, and it's solid, well-built, and cake to install. I'll let him comment further if he feels the need. A roll
cage is a different animal, and NOT in ANY way recommended for a daily-driver or dual purpose car. Something about having your head a few inches away from steel tubing when you're not wearing a helmet is not exactly smart on the street. As I mentioned, for me safety is a key item. I had a bar, seats, harnesses and a HANS in mine the day I figured out that I was going FASTER in TT than the eqivalent race classes... And yes, I completely understand the budget thing! I'm currently running around 35HP under my class bogey, but here is my prioritized mod list:
1. Onboard fire system to supplement the hand-held in the car.
2. FIA right and left side containment nets (and I already have a Halo seat!)
3. FIA FT3 fuel cell
4. Cams and a re-tune.
Maybe I'm over the top on the safety thing, but I think you can see where I'm coming from.
Well, thank you for your service!! I didn't know you were in... what branch, if I may ask?