# Safe? or not so safe? **URL:** \ **Category:** NYSpeed Automotive\ **Created:** [February 12, 2007, 6:02am UTC](https://forums.speedlife.net/t/safe-or-not-so-safe/24426 "2007-02-12T06:02:45Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![King](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/king/32/7329_2.png) [@King](https://forums.speedlife.net/u/King)\ **Post date:** [February 12, 2007, 6:02am UTC](https://forums.speedlife.net/t/safe-or-not-so-safe/24426/1 "2007-02-12T06:02:45Z")
…not sure if this is considered technical… but what are your feelings on having the harnesses on the strut bar like this rather than an actual harness bar ![http://northshoreracing.com/SharedPictures/Z/zpic13.JPG](http://northshoreracing.com/SharedPictures/Z/zpic13.JPG) ---
**Author:** ![boardjnky4](https://avatars.discourse-cdn.com/v4/letter/b/96bed5/32.png) [@boardjnky4](https://forums.speedlife.net/u/boardjnky4)\ **Post date:** [February 12, 2007, 6:06am UTC](https://forums.speedlife.net/t/safe-or-not-so-safe/24426/2 "2007-02-12T06:06:26Z")
doesnt seem like too bad of an idea to me, but im no engineer. on a side not, when i had a Z, i did that whole ricey red vinyl thing and it was disgusting and i never regretted something more then that. I think that guy is a ricer and should just spend a couple hundred on a harness bar ---
**Author:** ![King](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/king/32/7329_2.png) [@King](https://forums.speedlife.net/u/King)\ **Post date:** [February 12, 2007, 6:07am UTC](https://forums.speedlife.net/t/safe-or-not-so-safe/24426/3 "2007-02-12T06:07:38Z")
> [@boardjnky4](#): > > doesnt seem like too bad of an idea to me, but im no engineer. > > on a side not, when i had a Z, i did that whole ricey red vinyl thing and it was disgusting and i never regretted something more then that. I think that guy is a ricer and should just spend a couple hundred on a harness bar thats the NSRZ32 car…hes on the board here…and would PWN any car you’ll ever own 😛 [http://www.nyspeed.com/forums/showthread.php?t=2875](http://www.nyspeed.com/forums/showthread.php?t=2875) edit: but yes the red looks dumb as hell ---
**Author:** ![JayS](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jays/32/15375_2.png) [@JayS](https://forums.speedlife.net/u/JayS)\ **Post date:** [February 12, 2007, 6:24am UTC](https://forums.speedlife.net/t/safe-or-not-so-safe/24426/4 "2007-02-12T06:24:52Z")
I’ve never understood the desire to have a 5 point in a car without a cage. You roll that thing and your neck gets to support 4000 lbs of car. The exception would be autocross where you have lots of lateral G, but very low risk of rollover. ---
**Author:** ![newman](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/newman/32/7569_2.png) [@newman](https://forums.speedlife.net/u/newman)\ **Post date:** [February 12, 2007, 6:28am UTC](https://forums.speedlife.net/t/safe-or-not-so-safe/24426/5 "2007-02-12T06:28:31Z")
i’d need to see the design of the strut tower bar. If it uses spherical endlinks, those really aren’t designed to handle side loading, mostly axial… ---
**Author:** ![King](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/king/32/7329_2.png) [@King](https://forums.speedlife.net/u/King)\ **Post date:** [February 12, 2007, 6:33am UTC](https://forums.speedlife.net/t/safe-or-not-so-safe/24426/6 "2007-02-12T06:33:56Z")
> [@newman](#): > > i’d need to see the design of the strut tower bar. If it uses spherical endlinks, those really aren’t designed to handle side loading, mostly axial… something like the top one maybe? instead of one of those adjustable ones ---
**Author:** ![fairgentleman\_Z](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fairgentleman_z/32/7263_2.png) [@fairgentleman\_Z](https://forums.speedlife.net/u/fairgentleman_Z)\ **Post date:** [February 12, 2007, 6:37am UTC](https://forums.speedlife.net/t/safe-or-not-so-safe/24426/7 "2007-02-12T06:37:17Z")
Strut tower bolts are usually kinda small, not idea for shear. 1/2" bolts are usually used for harness mounts (yes very oversized). Strut bolts are like 1/4" in diameter at most, so less than 1/4 of the area of the intended use… ---
**Author:** ![newman](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/newman/32/7569_2.png) [@newman](https://forums.speedlife.net/u/newman)\ **Post date:** [February 12, 2007, 6:43am UTC](https://forums.speedlife.net/t/safe-or-not-so-safe/24426/8 "2007-02-12T06:43:45Z")
> [@K Cuv](#): > > something like the top one maybe? instead of one of those adjustable ones That’s not nearly as bad as an endlink. Also, I seem to remember reading somewhere that the decceleration felt in a standard street accident were on the order of about 75G’s. On a 200lb human, that’s 15,000 lbs. The shear strength of 2 lower grade M10 bolts is about 8,280lbs X 2 = 16560… so you would be “safe”… but not really… also, the those bolts are not in pure shear, you have a small moment arm acting on the bolt, adding some tensile stress. I’d need to see some geometry to determine what the forces actually were… but it’s pushing it. ---
**Author:** ![King](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/king/32/7329_2.png) [@King](https://forums.speedlife.net/u/King)\ **Post date:** [February 12, 2007, 6:46am UTC](https://forums.speedlife.net/t/safe-or-not-so-safe/24426/9 "2007-02-12T06:46:27Z")
> [@newman](#): > > That’s not nearly as bad as an endlink. Also, I seem to remember reading somewhere that the decceleration felt in a standard street accident were on the order of about 75G’s. On a 200lb human, that’s 15,000 lbs. > > The shear strength of 2 lower grade M10 bolts is about 8,280lbs X 2 = 16560… so you would be “safe”… but not really… > > also, the those bolts are not in pure shear, you have a small moment arm acting on the bolt, adding some tensile stress. I’d need to see some geometry to determine what the forces actually were… but it’s pushing it. its sexy how technical you get when you’re concerned for my safety ---
**Author:** ![newman](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/newman/32/7569_2.png) [@newman](https://forums.speedlife.net/u/newman)\ **Post date:** [February 12, 2007, 6:47am UTC](https://forums.speedlife.net/t/safe-or-not-so-safe/24426/10 "2007-02-12T06:47:14Z")
> [@K Cuv](#): > > its sexy how technical you get when you’re concerned for my safety 😛 \<3 ---
**Author:** ![boardjnky4](https://avatars.discourse-cdn.com/v4/letter/b/96bed5/32.png) [@boardjnky4](https://forums.speedlife.net/u/boardjnky4)\ **Post date:** [February 12, 2007, 8:02am UTC](https://forums.speedlife.net/t/safe-or-not-so-safe/24426/11 "2007-02-12T08:02:00Z")
> [@K Cuv](#): > > thats the NSRZ32 car…hes on the board here…and would PWN any car you’ll ever own 😛 > > [http://www.nyspeed.com/forums/showthread.php?t=2875](http://www.nyspeed.com/forums/showthread.php?t=2875) > > edit: but yes the red looks dumb as hell ok cool, you got me there. but with all that money put into the car, why not just add a harness bar ---
**Author:** ![Viper966](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/viper966/32/7268_2.png) [@Viper966](https://forums.speedlife.net/u/Viper966)\ **Post date:** [February 12, 2007, 8:37am UTC](https://forums.speedlife.net/t/safe-or-not-so-safe/24426/12 "2007-02-12T08:37:09Z")
are you sure that harnass bar is being used as an anchor point and not just a pivot point for the straps to keep them from haning too low? ---
**Author:** ![newman](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/newman/32/7569_2.png) [@newman](https://forums.speedlife.net/u/newman)\ **Post date:** [February 12, 2007, 8:40am UTC](https://forums.speedlife.net/t/safe-or-not-so-safe/24426/13 "2007-02-12T08:40:37Z")
> [@Viper966](#): > > are you sure that harnass bar is being used as an anchor point and not just a pivot point for the straps to keep them from haning too low? also a possibility, however, if they are anchored directly below the bar, then up and over, the forces are the same, decreasing on a sinusoidal curve as you move further towards the vehicles rear. ---
**Author:** ![Viper966](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/viper966/32/7268_2.png) [@Viper966](https://forums.speedlife.net/u/Viper966)\ **Post date:** [February 12, 2007, 8:54am UTC](https://forums.speedlife.net/t/safe-or-not-so-safe/24426/14 "2007-02-12T08:54:44Z")
> [@newman](#): > > decreasing on a sinusoidal curve as you move further towards the vehicles rear. well DUH, everybody knows that… geezsh ---
**Author:** ![2TurboZ](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/2turboz/32/7577_2.png) [@2TurboZ](https://forums.speedlife.net/u/2TurboZ)\ **Post date:** [February 12, 2007, 9:09am UTC](https://forums.speedlife.net/t/safe-or-not-so-safe/24426/15 "2007-02-12T09:09:55Z")
I am pretty sure the car is getting caged this year. The strut tower bar is less than ideal for safety for all of the abover reasons but sometimes you work with what you have.