A NB8B Turbo progress.

[NitroDann]

Than a 6, but better than the belt the seats were designed for? Doubt it.

The lap sash is basic and shitty, true, but it self tensions across your pelvis and while your back wont like a single diagonal strap on the front across a single shoulder, its a heck of a lot better than how a 4 point keeps you in the seat, literally relying on the strength of your intestines to hold you in.

No thanks.

Thats my opinion, and its held very solidly across American racecar groups and the yanks take race safety way way more seriously that we do.

Dann

[IanR]

I am not quite sure what to make of all the opinions on different harness setups, I have been doing reading on the topic myself as it applies to upright seats.

Crashing is always bad, but a crash that is so bad that there is a tangible difference on injury status between a 4 and a 5/6 point harness for my track day outings is a quite different to F1 driver requirements.

Having felt the difference at the track between lap sash in my Mx5 and a factory 4point I had in the exige I am not sure Dann what you mean by saying that it would be my intestines that are holding me in place, it is definitely more secure and load sharing having two shoulder straps over just one and the lower harness straps are far more secure than the moving lap sash system.

I have moved the Elise seats on (worst dble/quadrupole posting in the parts forum in history) and on the lookout for a more expensive set that can fit the bill. They were great for the price but not exactly what I am wanting.

On another note, getting some parts back from the spray painters... looking very nice, very happy!






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[greenMachine]

Re the harness question:

1. HNRS of some sort is becoming de rigeur, even where not required by regulation. Unless you have a Simpson HNRS device, read on.

2. The HANS HNRS depends on the shoulder straps holding it in place, meaning the shoulder straps need to be really tight (which they should be anyway)

3. The only way to get the shoulder straps really tight is to have them pulling against a crotch strap. Pulling against a lap belt just stretches it up towards the sternum(?), whereas the lap belt needs to be firm across the hips. I doubt that a four point belt could hold a HANS device firmly enough to do its job in a shunt, not sure what the manufacturers say though. Regardless of HNRS, a 5/6 point belt will hold you more firmly than a four and is the better configuration for that reason.

Most of us running dual duty cars have a race seat on a set of rails, it is a quick job to rattlegun the four bolts, pull out the stock/road seat, put in the race seat (and race harness while the seat is out), and rattlegun the four bolts back in. That way we are held firmly in place by both a 'proper' seat AND a tight harness.

I use a Stand21 HANS device, but even if I used a Simpson I would still use the crotch straps, it just hold you that little bit better.

On a different but related note, I guess you know the bar is not CAMS compliant. That is not a problem while you are road registered, but you might get some grief if you are running State-level competition, given some scrutineers can have their own ideas. It would be worth being prepared with a copy of the appropriate parts of 'the Manual', and watching to ensure that the Supp Regs don't require it for road registered cars. Hopefully a wasted effort, but a brawl with the scrutineers can spoil your day - and some of us have been through that. Apologies if this has been mentioned before.

[IanR]

Re the harness question:

1. HNRS of some sort is becoming de rigeur, even where not required by regulation. Unless you have a Simpson HNRS device, read on.

2. The HANS HNRS depends on the shoulder straps holding it in place, meaning the shoulder straps need to be really tight (which they should be anyway)

3. The only way to get the shoulder straps really tight is to have them pulling against a crotch strap. Pulling against a lap belt just stretches it up towards the sternum(?), whereas the lap belt needs to be firm across the hips. I doubt that a four point belt could hold a HANS device firmly enough to do its job in a shunt, not sure what the manufacturers say though. Regardless of HNRS, a 5/6 point belt will hold you more firmly than a four and is the better configuration for that reason.

Most of us running dual duty cars have a race seat on a set of rails, it is a quick job to rattlegun the four bolts, pull out the stock/road seat, put in the race seat (and race harness while the seat is out), and rattlegun the four bolts back in. That way we are held firmly in place by both a 'proper' seat AND a tight harness.

I use a Stand21 HANS device, but even if I used a Simpson I would still use the crotch straps, it just hold you that little bit better.

On a different but related note, I guess you know the bar is not CAMS compliant. That is not a problem while you are road registered, but you might get some grief if you are running State-level competition, given some scrutineers can have their own ideas. It would be worth being prepared with a copy of the appropriate parts of 'the Manual', and watching to ensure that the Supp Regs don't require it for road registered cars. Hopefully a wasted effort, but a brawl with the scrutineers can spoil your day - and some of us have been through that. Apologies if this has been mentioned before.

Thanks MrGreen,

Those are very good points, especially as it relates to the HANS device, makes allot more sense in that light.

I have only dríven at supersprint levels so far, but I should take all advice seriously as each decision for safety is wise.

Appreciate the input.

[NitroDann]

Submarining is prevented by the tightening of the lap belt in a lap sash. It tightens as your chest exerts force on the sash belt pulling downward on your pelvis.

A 4 point has no such mechanism, youre kept in the seat by an equal and opposite reaction, and what is opposite to your torso sliding forwards at 10g?

The lap belt pulling backwards.

Dann

[IanR]

Submarining is prevented by the tightening of the lap belt in a lap sash. It tightens as your chest exerts force on the sash belt pulling downward on your pelvis.

A 4 point has no such mechanism, youre kept in the seat by an equal and opposite reaction, and what is opposite to your torso sliding forwards at 10g?

The lap belt pulling backwards.

Dann

Ooh got the visual. Ok selected seats must have 5pt provisions!




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[RS2000]

Yes good points by gM & ND

[IanR]

Car back from the panel shop. Respiratory front and rear bars. Plus respray lhs quarter panels. The roll bar and air box were matched to the rocker cover silver (almost)... plus if you look closely you can see the mishimoto catch can install.


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[IanR]

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[Okibi]

Looks awesome, going to get the intake powder coated too?

[IanR]

Cheers, if you mean the intake plenum, no it will not get any painting, unless I have to take it off for some reason and have the car off the road... that will be all I am getting painted for a long time fingers crossed.


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[IanR]

A few things turned up in the mailbox, turning this...




Into this...




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[ManiacLachy]

Sometimes, the little things make a big difference. Looks much cleaner and nicer.

Did you get valve stems too? Probably wouldn't bother with those until it's time for new rubber though...

[Lokiel]

Remember to take them off on track days - they melt

[IanR]

Sometimes, the little things make a big difference. Looks much cleaner and nicer.

Did you get valve stems too? Probably wouldn't bother with those until it's time for new rubber though...

I haven’t looked at the stems...


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