harness bars!!!

[turboyaris]

Hey guys, I apologize for the wait I know you have all been patiently waiting..... so without further ado, I present to you the harness bar, the test fit was on a sedan, I will be test fitting one on a liftback this week. I plan to sell them uncoated, leaving it up to the owner to powdercoat, I believe this will be easier for those of you wanting to color match your interiors or whatever. If you would like your harness bar powdercoated a standard color like black or silver, I can have that done for you with added cost. I am still finalizing the pricing, but it looks like uncoated the cost will be 200$, if you want yours coated, I will have to find the cost of powdercoating. These should be available the end of this week. The tubing is all 4130 chromoly, Tig welded up. In the pictures you may notice the piece isn't welded, it was just all tacked together to test fitment.

http://i6.photobucket.com/albums/y221/reebok182/P2080245.jpg

http://i6.photobucket.com/albums/y221/reebok182/P2080246.jpg

http://i6.photobucket.com/albums/y221/reebok182/P2080247.jpg

[lilredrocket]

:eyebulge::thumbup::respekt::headbang::eyebulge: that looks amazing I really want one now!! What about red?

[turboyaris]

there is about a milllion different colors of red... you'd probably want to choose yourself... or I could guess which red you want haha

[lilredrocket]

ok thanks for the fast reply

[turboyaris]

here is a small list of some that you can purchase yourself... its just a place I knew of that had color samples kinda....
http://www.caswellplating.com/powder/powder_colors.html
you can get as crazy as you want to with the candy coats and all that

[2006fronty]

Now the rear passengers will have an "OH SHIT" bar :laugh:

[Tamago]

is the mounting tab on the B pillar gonna be more substantial than that?

[BLAZINBLUEVITZ]

what is actual purpose of this bar?

[mikenacarato]

a harness bar lets you properly attach and use a harness with aftermarket seats. it does at a little bit of rigidity as well.....and i want one. :)

[Nexus1155]

i recommend selling it with some foam padding as another kit, because if you do have passengers ever, and get into an accident, theyre gonna have some missing teeth...

And on the B Pillar, is it just attached to plastic?

[cleong]

Is this intended to replace the factory seatbelts? Because if it is, I sure hope you've tested it to see how much weight it'll hold before giving way.

If its also meant to add stiffness to the car as an incidental benefit, this is hardly a full-on rollcage.

Based on what I can see, it does little more than add weight, unless you used large-diameter chromoly tubing throughout firmly welded to the bodyshell.

[turboyaris]

its not attached to plastic, it uses the same mounting points as the factory seat belt system. the mounting tab is 3/16" chromoly, I'm not sure how much more substantial you would want it. I won't include any foam to put on the bar... it's not something you can have installed while having passengers in your rear seat, foam or not. You can install it with or without the factory seat belts in place, if you have passengers in your car occasionally, it can be removed with 4 bolts, leaving the brackets in place.
It probably does little to add rigidity, the main purpose is aside from a roll cage, there is no way to attach 4pt harnesses in your car.

[jkuchta]

Very cool bro...thanks a lot for delivering another product for our cars!:respekt:

[Treyz]

Hmmm ... I like :D

Subscribed.

[BLAZINBLUEVITZ]

it's not something you can have installed while having passengers in your rear seat, foam or not. You can install it with or without the factory seat belts in place

unsubscribed.....

[mikenacarato]

this is really only useful to people who track their cars or want to put in harnesses the correct way and dont have people ride in the back. any date on sales yet, im actually doing a redline time attack this summer and would like to get this AND seats installed before hand.

[blacksandiegovitz]

I'l buy one from you for sure ! I was really hoping you were gonna complete this harness bar project. I cant see any real flaws in design. Do you have a shop to do the powder coating, how much?

[cali yaris]

he said he is selling them unfinished, but would find out the cost of powdercoating.

[whooppee777]

awesome now i'll have a great reason for not being the carpool car. "sorry its impossible to get in the back seats" I LOVE IT!

i'll be getting one in the near future. but not yet

[TEHxFALLEN V1.2]

Hooray!!

I cannot wait to see your finished LB harness bar... and buy one.

[turboyaris]

hopefully it will be the same bar, only time will find out... that will make it easier for me and my inventory

[TEHxFALLEN V1.2]

It better fit the LB!! lol

[Treyz]

^ x2

[mikenacarato]

^x3 lolz

[anonymous user]

This is something all tracked ncp91's should have.
Thank you for designing this.

[turboyaris]

if it doesn't fit, rest assured I will have a sedan and liftback model

[ChinoCharles]

Certified awesome. Thanks man.

[Tamago]

\the mounting tab is 3/16" chromoly, I'm not sure how much more substantial you would want it.

can you take a close up shot of that tab? i'm curious what is going on there :) very innovative setup!

[turboyaris]

Here is the picture of the top brackets
http://i6.photobucket.com/albums/y221/reebok182/0209090002.jpg
http://i6.photobucket.com/albums/y221/reebok182/0209090003.jpg

Here is the lower ones
http://i6.photobucket.com/albums/y221/reebok182/0209090004.jpg


about the only way you could make them more substantial is to weld on triangle gussets to the top bracket. The only problem with that is then you could no longer install the factory seatbelts as well... If you are interested in that, I can do yours like that Tamago. However, remember that the bracket would be weakest bending past 90, but the bracket is also angled downward, so the forces acting on it would essentially have to twist the bend, if that makes any sense.

[Tamago]

Here is the picture of the top brackets
http://i6.photobucket.com/albums/y221/reebok182/0209090002.jpg
http://i6.photobucket.com/albums/y221/reebok182/0209090003.jpg

Here is the lower ones
http://i6.photobucket.com/albums/y221/reebok182/0209090004.jpg


about the only way you could make them more substantial is to weld on triangle gussets to the top bracket. The only problem with that is then you could no longer install the factory seatbelts as well... If you are interested in that, I can do yours like that Tamago. However, remember that the bracket would be weakest bending past 90, but the bracket is also angled downward, so the forces acting on it would essentially have to twist the bend, if that makes any sense.

i already have a harness bar, i'm playin devil's advocate right now. ;). i'm just curious why you dont weld it solid (do the yarii vary THAT much at the B pillars? Sparco bars are welded solid and don't seem to have fitment issues)

what size bolt are you using to fasten that bracket (upper) and what did you put inside the actual bar tube to thread the bolt into?

don't get me wrong, i'm just asking the questions no one else is asking.. more worried about colors and pads :iono:

[turboyaris]

the fastening bolt is a 12mm bolt fine thread grade 8, as that is standard for the seatbelts, it comes with a spacer to facilitate the ability to have the seat belts and harness bar installed together. It is grade 8. the tube end is a extra thick washer .100" thick with a 1/2-20 grade 8 nut welded on the back side, and its all held together by a grade 8 1/2-20 bolt.

This style of tube end is plenty strong, we use it as a engine bay cross brace for late model cars all the time.

As for the difference in B-pillar dimensions, I am unsure, because I haven't had the opportunity to measure a liftback, I imagine they are close in measurement, but it has about 1.5" of difference built in in the unlikely event they are different.

[Tamago]

the fastening bolt is a 12mm bolt fine thread grade 8, as that is standard for the seatbelts, it comes with a spacer to facilitate the ability to have the seat belts and harness bar installed together. It is grade 8. the tube end is a extra thick washer .100" thick with a 1/2-20 grade 8 nut welded on the back side, and its all held together by a grade 8 1/2-20 bolt.

This style of tube end is plenty strong, we use it as a engine bay cross brace for late model cars all the time.

As for the difference in B-pillar dimensions, I am unsure, because I haven't had the opportunity to measure a liftback, I imagine they are close in measurement, but it has about 1.5" of difference built in in the unlikely event they are different.

good thinking. this means your bar will almost certainly fit the scion xA xB, honda FIT, basically all smaller cars :)

get some donor cars and get these things OUT there!

[turboyaris]

good thinking. this means your bar will almost certainly fit the scion xA xB, honda FIT, basically all smaller cars :)

get some donor cars and get these things OUT there!

You read my mind ;) , the only thing that might have to be changed is the little spacer that goes on the seat belt bolt to fit.

[cleong]

Just from a safety point of view I hope you're going to test the strength of the setup. For a 100mph car crash its been estimated that a driver experiences anything between 30-100Gs deceleration forces, forces which are concentrated on the attachment points of the harness bars.

For such a safety device it should first and foremost do what its supposed to do. Aesthetics are nice to have, but secondary.

[turboyaris]

well assuming those numbers, and the driver being a hefty 200 lbs, the resulting force would be 6,000-20,000 lbs divided in half by the fact that two seat belt fastening points are on the body (for a 4pt harness) would give you an acting force of 1,500-5,000 lbs divide that by the 4 mounting points of the harness bar system and you have an acting force on each bracket of 375-1,250 lbs, and that is negating the fact that the force would be acting to pull the bar forward parallel to the earth, while the harness bars mounting is at angles to that.

[Tamago]

Just from a safety point of view I hope you're going to test the strength of the setup. For a 100mph car crash its been estimated that a driver experiences anything between 30-100Gs deceleration forces, forces which are concentrated on the attachment points of the harness bars.

For such a safety device it should first and foremost do what its supposed to do. Aesthetics are nice to have, but secondary.

100mph car crash and without a HANS device, the driver will lose his head.. harness bar won't even be an issue at that point..

thank god it takes a good 2 and a half minutes to get to 100mph in a yaris :D

[turboyaris]

aw tamago, where is your desire to solve things mathematically

[cleong]

100mph car crash and without a HANS device, the driver will lose his head.. harness bar won't even be an issue at that point..



That's quite conjectural, as an F1 driver (David Purley) back in '77 survived a 180g impact, this is way before HANS were commonplace, or even invented:

He survived an estimated 179.8 G's in 1977 when he decelerated from 173 km/h (108 mph) to 0 in a distance of 66 cm (26 inches)

[jkuchta]

I think the harness bar will survive anything the rest of the driver's compartment will survive.

Slowing from 108 mph to 0 in 26 inches in a yaris without a full rollcage would be unsurvivable IMHO, no matter what restraint system was used. The front end of the car would intrude into the driver's compartment too far.

[cleong]

I'm not asking for a 100mph crash test, perhaps we're going off on a tangent here.
That being said, I have seen almost 100mph on my local track at the end of a 2200+ ft straight. And no, it didn't take two and a half minutes.

So long as a harness bar is at least as strong as the original seatbelts were I suppose that is good enough. Euro NCAP usually tests at only 40mph, though.

[kustom play]

i wonder if this will have the same issue the TC and XB had where the pillars the harness bar was attached to started to cave in after some time

[turboyaris]

i wonder if this will have the same issue the TC and XB had where the pillars the harness bar was attached to started to cave in after some time

by this, do you mean that over time the chassis of the tc and xb began to flex causing the B pillars to come closer together? If that is the case, this bar should help that, as it would continuously be holding it at the dimensions it is installed in, if your car has already had this "dimension change" that is the reason for the slot in the brackets, to allow for slight differences in chassis measurements


Oh and tamago, it looks like the hatchback is 3/4" wider at the B-pillar, or at least thats what the collision section of the factory repair manual says, page DI-5 and DI-8 measurement J-j is the measure from the top of the B-pillars, I will have to double check on a actual liftback.

[rob323]

Turboyaris, I have a small concern about the design, I will pm you.

[cali yaris]

Why not post it so we can all hear your concern?

[Tamago]

Turboyaris, I have a small concern about the design, I will pm you.

as do i. but no one wants to hear that.. they just want to know what colors they'll be available in.... well.. besides Garm that is.. :iono:

[rob323]

Nah, my concerns might be totally unfounded in which case it would just be pointless clutter and not beneficial to the thread.

[Tamago]

Nah, my concerns might be totally unfounded in which case it would just be pointless clutter and not beneficial to the thread.

so only positive comments are beneficial to the thread?

[turboyaris]

haha I take all concerns, I would like to know yours Tamago,

Robs concern was just in the design and in possibly adding an extra pair of legs, but as I informed him, I didn't believe that it would be a neccessary as I feel the unit would be strong enough to hold up. as many companies have a similar design.

Tamago, was yours just in the design of the upper bracket?

[Tamago]

Tamago, was yours just in the design of the upper bracket?

yes, still concerned with that L bend..

[kustom play]

by this, do you mean that over time the chassis of the tc and xb began to flex causing the B pillars to come closer together? If that is the case, this bar should help that, as it would continuously be holding it at the dimensions it is installed in, if your car has already had this "dimension change" that is the reason for the slot in the brackets, to allow for slight differences in chassis measurements


Oh and tamago, it looks like the hatchback is 3/4" wider at the B-pillar, or at least thats what the collision section of the factory repair manual says, page DI-5 and DI-8 measurement J-j is the measure from the top of the B-pillars, I will have to double check on a actual liftback.

no i mean people installed a harness bar in there TC and it started to sink the pillar below it

i might be able to dig up pics

dont know about the XB i know thats the reason we opted not to get it for our TC

happened here to somebody local you can see the pillars bent in, it wasnt a good thing

could of been the bar design or something but i know there were a few people who had that happen to them

[turboyaris]

hmm thats interesting... The only thing i can think of, is that if the bracket and the bar were welded together, as sparco's are, that possibly they were too small, and the customer just wrenched on the bolts and the bar would probably be stronger then the b pillars, he himself might have done it... I don't know, merely speculation

[Tamago]

why not adopt a plate like this... much stronger

you could always shim the bar for the "wider" b pillar configurations

http://img.photobucket.com/albums/v282/dexter_5000/Mods/harness%20bar/harnessbar01.jpg

[cali yaris]

^ very nice --

um... what colors does it come in?


LOL

[turboyaris]

haha sorry. tamago, I try to make my harness bars look a little nicer... plus the problem with that, or so it appears, is that the bar is higher then the opening in the seat for the harnesses, the bar is supposed to be just slightly lower then those openings... plus, what keeps that bar in place vertically? it looks like that bar could just rotate freely around the seat belt bolt... which could spell disaster.

[Tamago]

haha sorry. tamago, I try to make my harness bars look a little nicer... plus the problem with that, or so it appears, is that the bar is higher then the opening in the seat for the harnesses, the bar is supposed to be just slightly lower then those openings... plus, what keeps that bar in place vertically? it looks like that bar could just rotate freely around the seat belt bolt... which could spell disaster.


oh god.......

i knew i shouldn't have shown a picture of an un-finished bar... clearly this was a picture of the mockup for the hoop itself :laugh:

so obviously, if this is just a picture of a mockup of the hoop assembly, then the "placement" in relation to the seat height is invalid.

it wouldn't take too much effort to redesign your bar to be as strong as the one i posted (but please use a larger diameter tubing)

[id3379]

A+ for making it for sedan first!

The sedan's need WAY MORE aftermarket love.

[turboyaris]

haha i figured tamago, just had to give you some grief ;)

[Tamago]

haha i figured tamago, just had to give you some grief ;)

give all the grief you want, it's not my design anyway :wink: no one would want to run my setup :wink:

[turboyaris]

give all the grief you want, it's not my design anyway :wink: no one would want to run my setup :wink:


THAT'S CAUSE YOU OWN A SCION!!!!! :barf: OHHHHHHH hahaha :respekt:

[Jerkratt]

i deff want one of these especially when ig et my racing seats... im even buying a recaro baby seat for my son.. so now i gotta find a set of recaro seat to match :)

[Tamago]

THAT'S CAUSE YOU OWN A SCION!!!!! :barf: OHHHHHHH hahaha :respekt:


lol but seriously.. no one would want my harness bar..

it requires a rear seat delete.

[BLAZINBLUEVITZ]

i deff want one of these especially when ig et my racing seats... im even buying a recaro baby seat for my son.. so now i gotta find a set of recaro seat to match :)

TRD makes them in red or blue at 600 bucks......

[Tamago]

TRD makes them in red or blue at 600 bucks......

who MAKES them?

[turboyaris]

in case you sedan guys don't look in the private party section....

now for sale.....

http://www.yarisworld.com/forums/showthread.php?t=14539

[cali yaris]

if you post some dyno charts showing the hp gain, people will buy these like crazy. :biggrin:

seriously, very nicely done, hope they go fast!

[BLAZINBLUEVITZ]

who MAKES them?

recaro i believe. i found it on the trd japan website

[turboyaris]

if you post some dyno charts showing the hp gain, people will buy these like crazy. :biggrin:

seriously, very nicely done, hope they go fast!

shit I knew i forgot something... I dynoed it on my generator... Lit up the whole town

[Kenshin]

When can you start selling these? Have you got the quote for powder coat? I'm very anxious to buy one asap

[Jerkratt]

the seats are more like 1327.14... a piece.. http://trdparts.jp/english/parts_trd-recaro.html