harness bars!!! - Page 2 - Toyota Yaris Forums

whooppee777 · 02-09-2009, 04:53 PM

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 · 02-09-2009, 08:24 PM

Hooray!!

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

turboyaris · 02-09-2009, 08:33 PM

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 · 02-09-2009, 11:05 PM

It better fit the LB!! lol

Treyz · 02-09-2009, 11:08 PM

^ x2

mikenacarato · 02-09-2009, 11:12 PM

^x3 lolz

anonymous user · 02-09-2009, 11:14 PM

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

turboyaris · 02-09-2009, 11:31 PM

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

ChinoCharles · 02-09-2009, 11:33 PM

Certified awesome. Thanks man.

Tamago · 02-09-2009, 11:36 PM

Quote:

Originally Posted by turboyaris

\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 · 02-10-2009, 12:06 AM

Here is the picture of the top brackets

Here is the lower ones

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 · 02-10-2009, 12:10 AM

Quote:

Originally Posted by turboyaris

Here is the picture of the top brackets

Here is the lower ones

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

turboyaris · 02-10-2009, 12:27 AM

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 · 02-10-2009, 12:43 AM

Quote:

Originally Posted by 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.

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 · 02-10-2009, 12:46 AM

Quote:

Originally Posted by Tamago

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 · 02-10-2009, 01:17 AM

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 · 02-10-2009, 01:32 AM

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 · 02-10-2009, 01:33 AM

Quote:

Originally Posted by 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.

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

02-09-2009, 04:53 PM	#19
whooppee777 I used to have 1700 posts View User's Garage Drives: 2008 Yaris Hatch Join Date: Apr 2007 Location: Maryland Posts: 808	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 __________________ *First Boosted Yaris On The East Coast*

02-09-2009, 08:24 PM	#20
TEHxFALLEN V1.2 Banned View User's Garage Drives: '08 Lexus IS-F Join Date: Oct 2008 Location: Calabasas, CA Posts: 1,890	Hooray!! I cannot wait to see your finished LB harness bar... and buy one. __________________ DON'T LIKE ME? TAKE A SEAT WITH THE REST OF THE BITCHES WHO ARE WAITING FOR ME TO GIVE A FUCK. Sponsored by: Micro Image http://microimageonline.com

02-09-2009, 11:05 PM	#22
TEHxFALLEN V1.2 Banned View User's Garage Drives: '08 Lexus IS-F Join Date: Oct 2008 Location: Calabasas, CA Posts: 1,890	It better fit the LB!! lol __________________ DON'T LIKE ME? TAKE A SEAT WITH THE REST OF THE BITCHES WHO ARE WAITING FOR ME TO GIVE A FUCK. Sponsored by: Micro Image http://microimageonline.com

02-09-2009, 11:08 PM	#23
Treyz ~ ambient one ~ View User's Garage Drives: 2009 Bayou Yaris Liftback Join Date: Jan 2007 Location: Long Island, NY Posts: 1,046	^ x2 __________________ AMBIENTLIFESTYLE Tri-State Sport Compact EZine ambientlifestyle.com------------ambientlifestyle.ning.com Micro Image Store - Network - Online microimageonline.com------------microimage.ning.com

02-10-2009, 01:17 AM	#34
cleong Parallel Parking Pro View User's Garage Drives: Yaris 1.5 Manual Join Date: Dec 2006 Location: Singapore Posts: 590	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. __________________ Leong's NCP91 Toyota Yaris E Hankook V12 Evo 195/55/15 on Buddy Club P1 replicas 15x7 ET +38 Stebel horns, Philips Silvervision turn indicator bulbs TTE Lowering Springs, Camber bolts TRD Blue brake pads Fujitsubo Super Wagolis axleback exhaust DC Sports header

02-09-2009, 08:33 PM	#21
turboyaris Drives: 2007 Yaris Sedan Join Date: Jan 2007 Location: Southern New Jersey Posts: 459	hopefully it will be the same bar, only time will find out... that will make it easier for me and my inventory

02-09-2009, 11:12 PM	#24
mikenacarato SIPNDEW View User's Garage Drives: 15 STI Join Date: Oct 2008 Location: Brentwood, TN Posts: 2,281	^x3 lolz

02-09-2009, 11:14 PM	#25
anonymous user rarer than JDM -1 of 1! View User's Garage Drives: 07yaris Join Date: Oct 2008 Location: windward oahu Posts: 402	This is something all tracked ncp91's should have. Thank you for designing this.

02-09-2009, 11:31 PM	#26
turboyaris Drives: 2007 Yaris Sedan Join Date: Jan 2007 Location: Southern New Jersey Posts: 459	if it doesn't fit, rest assured I will have a sedan and liftback model

02-09-2009, 11:33 PM	#27
ChinoCharles Banned Drives: LB Join Date: Jul 2006 Location: OH Posts: 7,787	Certified awesome. Thanks man.

02-10-2009, 12:06 AM	#29
turboyaris Drives: 2007 Yaris Sedan Join Date: Jan 2007 Location: Southern New Jersey Posts: 459	Here is the picture of the top brackets Here is the lower ones 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.

02-10-2009, 12:27 AM	#31
turboyaris Drives: 2007 Yaris Sedan Join Date: Jan 2007 Location: Southern New Jersey Posts: 459	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.

02-10-2009, 01:32 AM	#35
turboyaris Drives: 2007 Yaris Sedan Join Date: Jan 2007 Location: Southern New Jersey Posts: 459	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.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
DIY (08' USDM Liftback): ESUSE Fog Light Install v2.0	goku87	DIY / Maintenance / Service	127	02-19-2023 08:01 PM
Gauging Interest: Whiteline Front/Back Adjustable Sway Bars	RaptorRacing	Wheels, Tires and Suspension Forum sponsored by The Tire Rack	35	12-15-2009 05:23 AM
F.S. MOMO Acropolis Evo Carbon Kevlar Competition Seat with 4 piont Harness	Ric n Sov's Vitz RS	Items for Sale by private party	2	10-19-2008 02:34 AM
Yakima Q towers and roof mounts (no bars, locks) for sale $125 shipped	pxpaulx	Items for Sale by private party	6	04-24-2007 11:54 AM
How exactly does an heavier duty harness work?	IsLNdbOi	Performance Modifications	5	09-26-2006 05:19 AM