Edited by destroid, 30 May 2016 - 04:13 PM.
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#1
Posted 30 May 2016 - 11:05 AM

- Tim, forty-two and shawnhayes like this
#2
Posted 30 May 2016 - 11:30 AM

Not the normal build thread, but these are some of the little modifications and maintenance tweaks I've done for street and track day use."It's the little differences." - Vincent Vega....HANS type deviceCategory: Spine integrity / SafetyNotes:Schroth SHR Flex. Comfortable and has features to keep the harness in place.Compatable with the Schroth ASM 4-point belts.
nice! lol like the sly humor.
But I was curious how you like the SHR flex? I was interested in getting it. I went from a Hans to the Necksgen...but this one with some of the features of the Necksgen and hans seems like a nice mix...
best of both worlds
can you write a review, snag some pics?
In7anity!!
#3
Posted 30 May 2016 - 11:36 AM

4-point HarnessCategory: Keeping your ass in the seat / SafetyNotes:Schroth Profi II ASM 4-point harness. Comfortable and designed for street cars - make sure to cross the rear shoulder belts
I like the thread, but there is some disagreement about that one amongst "experts". I was uncomfortable enough with the controversy that I just said screw it and got a rear cage with a six point.
I STILL don't know who is right about that one.
Shawn
P.S. just rechecked Scroth's instructions, and say to cross if greater than 18", but I've seen other harness makers show that as an "incorrect" install. I always say follow the manufacturer's guidelines.
Edited by shawnhayes, 30 May 2016 - 11:45 AM.
#4
Posted 30 May 2016 - 11:59 AM

Hi Shawn - some of my modifications/decisions were based on your excellent threads and advice.
I would like to install a half cage but then no rear passengers and good luck fitting 4 track wheels in the car. My philosophy when upgrading safety equipment:
Safety/Risk is a compromise and I had gone way too long without a HANS considering that even on the short New England tracks I can reach 142+ mph. Staying home is of course safer, but I bought the GT-R to drive and have fun with managed danger.
A cage would improve rollover protection and shorten the rear belt length, but track day incidents are usually offs into a wall vs. a rollover. The 4-point allows me to run a HANS type device which will improve survivability in most scenarios.
The seats have harness slots so there is no issue with the belts slipping off the seatback. I am 6 ft tall and even with the HANS, the belt slots are still higher than my shoulders so spine compression is mitigated. So while the rear belts are longer than recommended, Schroth has some quick-fit harnesses for BMW etc. that use this routing to the rear seatbelt points (with crossed belts as per their instructions).
The Nissan factory drivers setting Nürburgring times used a 4-point harness mounted to the factory front and rear seatbelt points which are obviously designed for crash loads.
The Nismo N Attack pack has the optional 6-point Willans harness and carbon seats but still uses the factory seatbelt points except for the sub belts.
- shawnhayes likes this
#5
Posted 30 May 2016 - 12:09 PM

I got the Schroth SHR Flex because I recognize the amount of engineering improvement vs. the HANS. Think of it like the first iPhone - you can tell they addressed issues with existing solutions.
Also since I got Schroth ASM harnesses that the company tested with the SHR Flex I think the combination is safer than mixing and matching.
I'll add a more detailed writeup but so far quite happy with the fit after one full track day.
Edited by destroid, 30 May 2016 - 12:44 PM.
- 7racer likes this
#6
Posted 30 May 2016 - 12:10 PM

Hi Shawn - some of my modifications/decisions were based on your excellent threads and advice.
I would like to install a half cage but then no rear passengers and good luck fitting 4 track wheels in the car. My philosophy when upgrading safety equipment:
Safety/Risk is a compromise and I had gone way too long without a HANS considering that even on the short New England tracks I can reach 142+ mph. Staying home is of course safer, but I bought the GT-R to drive and have fun with managed danger.
A cage would improve rollover protection and shorten the rear belt length, but track day incidents are usually offs into a wall vs. a rollover. The 4-point allows me to run a HANS type device which will improve survivability in most scenarios.
The seats have harness slots so there is no issue with the belts slipping off the seatback. I am 6 ft tall and even with the HANS, the belt slots are still higher than my shoulders so spine compression is mitigated. So while the rear belts are longer than recommended, Schroth has some quick-fit harnesses for BMW etc. that use this routing to the rear seatbelt points (with crossed belts as per their instructions).
The Nissan factory drivers setting Nürburgring times used a 4-point harness mounted to the factory front and rear seatbelt points which are obviously designed for crash loads.
The Nismo N Attack pack has the optional 6-point Willans harness and carbon seats but still uses the factory seatbelt points except for the sub belts.
I'm with you brother. I certainly think that 99.9% of the on track incidents are okay with the four points.
I've been behind an M3 that went upside down in the straight essess at VIR. Smoke and all and the driver crawling out the window upside down. Roof collapsed down to the cage he had installed.
And watched a Golf auger in at turn 1 due to the master cylinder coming off the firewall. Yep. For real.
Both cars had a cage of some sort and full six points. Both drivers WALKED away with nothing. Not even a scratch.
I hit 160 last month on the back stretch of VIR. I'm not saying that the four points wouldn't have been okay in those wrecks. I'm not. I'm not 100% sure that my bolt in cage would have done what the M3's cage did in the rollover - but it increases my chances. If just a little bit.
Shawn
- destroid likes this
#7
Posted 30 May 2016 - 12:20 PM

When I get a EBA-R35 Nismo - not if - I will do my own "N Attack Light" program of improvements. This will include rear seat deletes and a half cage. All the safety equipment can transfer right over - and most of the cost was the Helmet, SHR Flex, and clothing (vs. the harnesses and mounting hardware).
Watkins Glenn is on the calendar this summer with SCDA - so a lot of the safety upgrades were getting ready for the bigger and faster tracks.
Edited by destroid, 30 May 2016 - 01:13 PM.
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#8
Posted 30 May 2016 - 12:26 PM

- destroid likes this
In7anity!!
#9
Posted 30 May 2016 - 01:13 PM

Nice review of the SHR Flex - I agree with most of it. If you are an instructor and have to sit in multiple cars with various seat angle and harness configurations the SHR is probably very useful.
The GT-R is a very upright driving position and the SHR was comfortable and would catch my head when looking down. Definitely slide it back on your shoulders so the rear yoke is not right up against the helmet.
Schroth updated the instructions and the mounting post slot should be from level to 45 degrees down at the rear.
- 7racer likes this
#10
Posted 31 May 2016 - 10:54 AM

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