I will be working on moving from HPDE days to some TT competitions. I am less concerned about the car setup now and more focused on the hard part being safe and reliable. I have listed a handful of things that will improve both in the order of importance to me. I would appreciate you guys take a look and offer any opinions.

Safety

With respect to safety I just pick up a fire suit, shoes, gloves......... so I have the starting point. Now I am looking into making the car a bit safer. Here are a few points that I was looking at in order.

1. Roll Bar
----- Bolt In for starters

2. Halo Seat & Harness & Hans
----- 4 Point Harness
----- I have been told not to use an antisubmarine harness w/o a full cage

4. A lot of wire lock

5. Master Power Kill Switch w/ roll over protection

6. Halon Fire suppressions System

7. Full Roll Cage
------- Safety Nets

8. Fuel Cell



Reliability

1. Data Acquisition
------ Add - Oil Pressure, Fuel Pressure, Oil Temperature

2. Cooling
------ Air diverters, baffles and under tray
------ Upgrade the radiator

3. Brake Cooling Ducts

4. A lot of wire lock

5. Baffled Oil Pan

6. Additional Fuel Pickup / Surge Tank

 

Why shouldn't you use a 5 or 6 point without a full roll cage?

 

I would definitely go with a 6 point harness

 

Agreed, 4 point harnesses are down right dangerous, if you get the "Schroth Rallye 4" it's supposed to protect you from submarining, but I'd rather just get a 5 or 6 point harness instead.

 

If the roof collapses the on an OEM car the seat belt allows for submarining in order to keep you from getting crushed. Using a roll bar will help prevent it from collapsing but if it does let go or the A-pillars collapse you will want to get as low as possible.

Now with a full cage it is assumed it will not collapse and as long as you are strapped in and not flailing around chances are you will come out alive.

IE - No Cage, stick with OEM or OEM style restraints - With a Cage strap in as much a possible.

Again this is what I have been told but don't have anything to back it up.

 

That is a valid reason, but I was assuming you had at least a proper roll bar while using harnesses.

 

This is an 'old wives tale' and very bad advice. When the "roof collapses" you're upside down and your body is moving toward the ceiling as you stretch the single OEM belt. If that collapsing roof coming up to meet your head hits your helmet and shoves your body up and through your harness to the submarine position your neck is already broken. There is no "getting as low as possible." What's more likely to happen is your head will pivot left, right or forward if you don't have a HANS.

I've heard this same argument for the OEM roll hoops and the OEM single shoulder strap. Theory is the collapsing roof can shove you sideways with a single strap where a double shoulder strap will hold you upright and break your neck. I don't believe that argument either. Personally I would prefer to roll in a completely stock S2000 with a 6 point harness, even in a stock seat. I believe you're much more likely to be hurt by your body's movement around the cabin that's allowed by the OEM single strap. Take into account how rare it is for an S to roll and the risk analysis shifts toward a 6 point harness being the safer option for track use. The A-pillar in the S2000 is very strong and in combination with the stock roll hoops and the rear of the car (3 main contact areas in a roll) does a great job of protecting the "living space."

 

Thank You Rob! I am going to start looking at seats, Hans and harness.

Would anyone happen to know if there is a good place to attached the shoulder straps without a rear roll bar/cage?

 

I don't know of any. You don't want to use the stock roll hoops because the plastic hoop shroud will break and allow too much harness movement. I had a Hard Dog roll bar with a harness bar in my car when I installed a 6 point harness and used it with the stock seat.

 

Either OEM all the way or race seat, 5-6 point harness, hans and 4 point roll bar with harness bar. I would not do anything in between or combination. You can get a fire bottle vs. the suppression system to cut cost if needed. I have no experience with fuel cell benefits.

What is wire lock? Are you talking about drilling bolt heads and adding safety wire?