Installing 5th Point on Harness
Thread Starter
Supreme Member
Joined: Oct 2001
Posts: 3,155
Likes: 2
From: Louisville, Ky
Car: 1991 Z28
Engine: 383
Transmission: T-5
Axle/Gears: 3.08 10 Bolt
Installing 5th Point on Harness
i have my interior completly stripped and i need to install the "ball buster" belt for my harnesses. whats the best way to do it. i planned to drill a hole in the floorpan and use the supplied bolt to bolt it down, then undercoat the understide. good idea?
Supreme Member
Joined: Nov 2004
Posts: 1,196
Likes: 6
From: Illinois
Car: '91 Z28 & '90 RS Vert & '89 RS
Engine: 5.7L & none & 2.8L (soon to be LSX)
Transmission: yes
Axle/Gears: One's with teeeeefs
You may want to use a thick piece of plate steel and weld it to the floor, if you have carpet out anyways. Then drill a hole and tap it to the tread pattern on your "supplied" bolt. Would be much stronger (safer) than just drilling hole in 22 gauge steel.
Thread Starter
Supreme Member
Joined: Oct 2001
Posts: 3,155
Likes: 2
From: Louisville, Ky
Car: 1991 Z28
Engine: 383
Transmission: T-5
Axle/Gears: 3.08 10 Bolt
i went with the generic APC seat. Sparcos were going to be purchased but i found these at a hell of a deal.
were you referring to the 5th point on the harness or the harness altogether?
http://www.jegs.com/cgi-bin/ncommerc...prrfnbr=158808
were you referring to the 5th point on the harness or the harness altogether?
http://www.jegs.com/cgi-bin/ncommerc...prrfnbr=158808
Thread Starter
Supreme Member
Joined: Oct 2001
Posts: 3,155
Likes: 2
From: Louisville, Ky
Car: 1991 Z28
Engine: 383
Transmission: T-5
Axle/Gears: 3.08 10 Bolt
nope my interior is completly stripped so im puttin my subframe connectors in there, cage, and mounting everything then. hopefully im also gonna run the lines for my nitrous and fix a spot thats got a good chance of rusting through.
Supreme Member
iTrader: (13)
Joined: Dec 2002
Posts: 2,535
Likes: 17
From: Bowdon, GA.
Car: 1988 Camaro
Engine: 355, 10.34:1, 249/252 @.050", IK200
Transmission: TH-400, 3500 stall 9.5" converter
Axle/Gears: Ford 9", detroit locker, 3.89 gears
If you want it to be safe and race legal you'll need to do alittle more than just bolt it anywhere
"crotch strap must anchor behind driver's chest line"
side seat belts must be at a 45* angle and anchored apart, width of driver, no more no less
Shoulder belts must be anchored to seat crossbar, and between level to 4" below driver's sholders. Never above and no more thsn 4" below
On the crotch strap, I would back up the sheet metal floor with a 6" x 6" x 1/8" steel plate on top and on bottom of floor pan. Put your bolt through a hole you drilled through both plates and floor pan. Use a longer bolt, and put 2 taps on it under the car. Use 12 tap as a jam nut, to keep the 1st one from backing off.
I would do the same with all belt anchor points that goes to the floor
"crotch strap must anchor behind driver's chest line"
side seat belts must be at a 45* angle and anchored apart, width of driver, no more no less
Shoulder belts must be anchored to seat crossbar, and between level to 4" below driver's sholders. Never above and no more thsn 4" below
On the crotch strap, I would back up the sheet metal floor with a 6" x 6" x 1/8" steel plate on top and on bottom of floor pan. Put your bolt through a hole you drilled through both plates and floor pan. Use a longer bolt, and put 2 taps on it under the car. Use 12 tap as a jam nut, to keep the 1st one from backing off.
I would do the same with all belt anchor points that goes to the floor
Trending Topics
Supreme Member
iTrader: (1)
Joined: Feb 2000
Posts: 7,964
Likes: 4
From: Norfolk, VA. USA
Car: 86 Trans Am, 88 Formula
Engine: 95LT4, 305TPI
Transmission: T56, T5
Originally posted by Night rider327
If you want it to be safe and race legal you'll need to do alittle more than just bolt it anywhere
"crotch strap must anchor behind driver's chest line"
side seat belts must be at a 45* angle and anchored apart, width of driver, no more no less
Shoulder belts must be anchored to seat crossbar, and between level to 4" below driver's sholders. Never above and no more thsn 4" below
On the crotch strap, I would back up the sheet metal floor with a 6" x 6" x 1/8" steel plate on top and on bottom of floor pan. Put your bolt through a hole you drilled through both plates and floor pan. Use a longer bolt, and put 2 taps on it under the car. Use 12 tap as a jam nut, to keep the 1st one from backing off.
I would do the same with all belt anchor points that goes to the floor
If you want it to be safe and race legal you'll need to do alittle more than just bolt it anywhere
"crotch strap must anchor behind driver's chest line"
side seat belts must be at a 45* angle and anchored apart, width of driver, no more no less
Shoulder belts must be anchored to seat crossbar, and between level to 4" below driver's sholders. Never above and no more thsn 4" below
On the crotch strap, I would back up the sheet metal floor with a 6" x 6" x 1/8" steel plate on top and on bottom of floor pan. Put your bolt through a hole you drilled through both plates and floor pan. Use a longer bolt, and put 2 taps on it under the car. Use 12 tap as a jam nut, to keep the 1st one from backing off.
I would do the same with all belt anchor points that goes to the floor
http://www.nasaproracing.com/rules/ccr.pdf
Page 55 is where the harness info was.
-The requirement for angle of shoulder harnesses has been changed from 40 degrees to 20 degrees. The seat can no longer be used as a belt guide to meet the rule; it must be met with the belt attachements. This may affect a lot of people.
-Window nets are good for 5 years, as per the update earlier this year
-Tow eyes are now REQUIRED
-Proper racing seat is RECOMMENDED
-Requirements for seat mounting reinforcements on non-steel floors
-Advisory that SA2000 helmets will be required for 2006
-Advisory to expect SFI 38.1 Head & Neck restraints to be required for 2006
-Updates to some of the definitions of "punting" and the like
15.5 Driver restraint system
(See diagram at end of section)
1. All vehicles must have a five (5), six (6), or seven (7) point seat belt system. Arm
restraints are required in open cars and cars with: Open T-tops, Open Targa
tops, missing moon/sun roofs, or glass moon/sun roofs.
2. A five (5) point system consists of a three (3) inch lap belt, two (2) or three (3)
inch shoulder belts, and a two (2) inch anti-submarine strap.
3. A six (6) point system is recommended for cars where the driver is seated in an
upright (to 30 degrees) or a semi-reclining position. It consists of two (2) antisubmarine
belts in addition to lap and shoulder belts. Note: FIA Approved belt
sets with 2” lap belts are acceptable with the six (6) point system.
4. A seven (7) point system is recommended for seats with more than thirty (30)
degrees of incline. Note: FIA Approved belt sets with 2” lap belts are acceptable
with the seven (7) point system.
5. The material of all straps should be Nylon or polyester, and in new or perfect
condition. The buckles should be metal quick release. There should be a
common release for all belts. [Note: Certain Momo brand belts were recalled by
the manufacturer. These are NOT suitable for racing.]
6. The shoulder harness shall be mounted behind the driver and above a line drawn
downward from the shoulder point at an angle of no more than twenty (20) forty
(40) degrees with the horizontal.
7. The seat, seat holes, and attachments to the seat are not permissible “harness
guides” for compliance with the angle requirement. Only specific harness guide
bars, or parts of the chassis or the cage are allow to be used for this purpose.
The guide bar, if used, should not present a sharp edge to the belt. It should
provide as much area of support as possible to distribute the load.
8. Only separate shoulder straps are permitted. “H” type belts are allowed. “Y”
type belts are not allowed. Each should strap must have an independent
mounting point.
9. All mounting hardware should be SAE grade five (5) or better. Large diameter
mounting washers should be used to spread the load. Bolting through floor
panels etc. is not acceptable without required washers.
10. All belts should meet at least one of the following:
A) SFI Specification 16.1 or 16.5 (for use with HANS only) and shall bear a
dated label of no more than two (2) years old. At least one date label is
required on belt sets.
B) A restraint systems meeting FIA spec #8853/1985, 8853/98, or D-
###.T/98, including amendment 1/92 may be used. FIA certified belts have a
label that shows an expiration date. The belts cannot be used past
December 31st of the year shown on the label. At least one date label is
required on belt sets.
11. All drivers should take care to ensure that their belts are properly worn, adjusted,
and latched. “Cam-lock” type belts can be subject to inadvertent release,
should the driver fail to ensure that they are properly latched.
12. Any driver involved in a high impact crash shall send all of their safety belts back
to the manufacturer for inspection, re-webbing if necessary, and re-certification
before they may be used again in competition. Proof of re-certification is the
driver’s responsibility.
13. All belts should be threaded to the manufacturer’s instructions. An example of
one type of threading instruction set that appears at end of this section.
Last edited by Zepher; Jan 14, 2005 at 05:48 AM.
Thread Starter
Supreme Member
Joined: Oct 2001
Posts: 3,155
Likes: 2
From: Louisville, Ky
Car: 1991 Z28
Engine: 383
Transmission: T-5
Axle/Gears: 3.08 10 Bolt
good lord. that is a lot of rules on restraints. now as far race legal what exactly are you referring to? as far as i know standard seatbelts are just fine to run at my track
Supreme Member

Joined: Jun 2001
Posts: 9,550
Likes: 4
From: Charleston, SC
Car: 91 Camaro Vert
Engine: 02 LS1, HX40
Transmission: 2002 LS1 M6
Originally posted by CamarosRUS
good lord. that is a lot of rules on restraints. now as far race legal what exactly are you referring to? as far as i know standard seatbelts are just fine to run at my track
good lord. that is a lot of rules on restraints. now as far race legal what exactly are you referring to? as far as i know standard seatbelts are just fine to run at my track
not really.
they come down to this:
good condition harness firmly secured in a location that allows a safe angle for the driver.
a improperly mounted belt does more harm then good.
Supreme Member
iTrader: (3)
Joined: Jan 2004
Posts: 2,311
Likes: 0
From: p'cola FL
Car: 88 iroc-z/28
Engine: 408 lsx
Transmission: 5800 stall
Axle/Gears: 4.71
DO NOT DRILL YOUR FLOORS. wolfe racecraft builds a crotch strap bracket that bolts to the seat track, looks slick, hides well, and is fairly cheap. supposed to be legal.
i run 11's and never had any trouble with tech.
i run 11's and never had any trouble with tech.
Thread Starter
Supreme Member
Joined: Oct 2001
Posts: 3,155
Likes: 2
From: Louisville, Ky
Car: 1991 Z28
Engine: 383
Transmission: T-5
Axle/Gears: 3.08 10 Bolt
you seem pretty adamant on that...is there a specific reason? and do you have a link that i could look at??
Supreme Member
iTrader: (3)
Joined: Jan 2004
Posts: 2,311
Likes: 0
From: p'cola FL
Car: 88 iroc-z/28
Engine: 408 lsx
Transmission: 5800 stall
Axle/Gears: 4.71
Originally posted by CamarosRUS
you seem pretty adamant on that...is there a specific reason? and do you have a link that i could look at??
you seem pretty adamant on that...is there a specific reason? and do you have a link that i could look at??
i painted my wolfe brackets black, bolted them up, but the lil black seat cover track brackets on and you cant even see them. looks factory.
http://www.wolferacecraft.com/detail.aspx?ID=252
Thread Starter
Supreme Member
Joined: Oct 2001
Posts: 3,155
Likes: 2
From: Louisville, Ky
Car: 1991 Z28
Engine: 383
Transmission: T-5
Axle/Gears: 3.08 10 Bolt
i do like that...a lot. but i dont see how exactly the 5th point would bolt to that. it looks like just a round tube.
Supreme Member
iTrader: (3)
Joined: Jan 2004
Posts: 2,311
Likes: 0
From: p'cola FL
Car: 88 iroc-z/28
Engine: 408 lsx
Transmission: 5800 stall
Axle/Gears: 4.71
Originally posted by CamarosRUS
i do like that...a lot. but i dont see how exactly the 5th point would bolt to that. it looks like just a round tube.
i do like that...a lot. but i dont see how exactly the 5th point would bolt to that. it looks like just a round tube.
Supreme Member
Joined: Nov 2004
Posts: 1,196
Likes: 6
From: Illinois
Car: '91 Z28 & '90 RS Vert & '89 RS
Engine: 5.7L & none & 2.8L (soon to be LSX)
Transmission: yes
Axle/Gears: One's with teeeeefs
"Ahhhhh.....I seeee....." says the blind man.
So you slide this bar thru the hoop in the bottom of the bottom strap on the harness and bolt this below the seats...
I get it I get it......
So you slide this bar thru the hoop in the bottom of the bottom strap on the harness and bolt this below the seats...
I get it I get it......
Guest
Posts: n/a
anyone here have a picture or know of anyone that is using 4th gen Camaro seats (or high back 3rd gens) with a 5 point harness and cage?
right now i have a cage waiting to go in, 4th gen leather, and 5 point harnesses... im going to weld on the bracket to fit the belts so they dont slide, but right now i dont have racing seats with slots for the belts.. is there a problem with them going over the top of the 4th gen seat at all? or is this a :nono:
right now i have a cage waiting to go in, 4th gen leather, and 5 point harnesses... im going to weld on the bracket to fit the belts so they dont slide, but right now i dont have racing seats with slots for the belts.. is there a problem with them going over the top of the 4th gen seat at all? or is this a :nono:
Thread Starter
Supreme Member
Joined: Oct 2001
Posts: 3,155
Likes: 2
From: Louisville, Ky
Car: 1991 Z28
Engine: 383
Transmission: T-5
Axle/Gears: 3.08 10 Bolt
thats cool. id appreciate the pic stage. i think i got it now, i was thinking too deep, lol (i actually forgot how my harnesses were put together until i looked at them tonight) but id still ike to see the pic.
those are a must now, but im concerned because my racing seats had to have custom brackets made and im afraid they might get in the way......damn
and AFAIK ive seen harnesses put on about every different type of seat made. it may not be "correct" but ive defenitly seen it.
those are a must now, but im concerned because my racing seats had to have custom brackets made and im afraid they might get in the way......damn

and AFAIK ive seen harnesses put on about every different type of seat made. it may not be "correct" but ive defenitly seen it.
Supreme Member
iTrader: (3)
Joined: Jan 2004
Posts: 2,311
Likes: 0
From: p'cola FL
Car: 88 iroc-z/28
Engine: 408 lsx
Transmission: 5800 stall
Axle/Gears: 4.71
i bolted mine in 1st, then the seat on top of the bracket.... im sure you could do it either way. i dont see a seat track getting in the way, unless you are really short and ther seat brackets are low, then you might not be able to pull it all the way forward.
4th gen camaro seats are a pita for a harness, IMO. i had a set, and the straps, when tightened, just didnt feel secure. if you really crunched on them, they would eventually slide off the sides of your shoulder.
i have seen this..... which would work awesome. head to a upholstry shop and see what they can do for you.
4th gen camaro seats are a pita for a harness, IMO. i had a set, and the straps, when tightened, just didnt feel secure. if you really crunched on them, they would eventually slide off the sides of your shoulder.
i have seen this..... which would work awesome. head to a upholstry shop and see what they can do for you.
Supreme Member
Joined: Nov 2004
Posts: 1,196
Likes: 6
From: Illinois
Car: '91 Z28 & '90 RS Vert & '89 RS
Engine: 5.7L & none & 2.8L (soon to be LSX)
Transmission: yes
Axle/Gears: One's with teeeeefs
that looks awwwwwwwwwwwwsome... I want I want I want
anyone else got pics of anything like this?
anyone else got pics of anything like this?
Supreme Member
iTrader: (1)
Joined: Feb 2004
Posts: 1,963
Likes: 0
From: Long Neck, De
Car: 2002 SS
Engine: Ls1
Transmission: T56
Axle/Gears: 3:42 posi
stage20! where did you get those seats, I have the same ones in my car..... well similar and i duno where they have from.. They have the 30th symbol on them.
Supreme Member
iTrader: (3)
Joined: Jan 2004
Posts: 2,311
Likes: 0
From: p'cola FL
Car: 88 iroc-z/28
Engine: 408 lsx
Transmission: 5800 stall
Axle/Gears: 4.71
Originally posted by crazy3rdgen
stage20! where did you get those seats, I have the same ones in my car..... well similar and i duno where they have from.. They have the 30th symbol on them.
stage20! where did you get those seats, I have the same ones in my car..... well similar and i duno where they have from.. They have the 30th symbol on them.
they have a headrest and the belts slide right under now.
the car is a 67-69 body that those seats were installed in, if that helps. ive been holding onto that pic for quite sometime.
good luck.
Senior Member

Joined: Sep 2002
Posts: 613
Likes: 0
From: Canada winnipeg
Car: '91 vert RS, '82 Z28
Engine: TBI 305, TPI 350
Transmission: Auto, 5 speed
with those APC seats how were you mounting them to the floor, i just bought the same set for my car just werking on the mounting, but i dont know if i want to fab brackets or build up the floor to make it level
Thread Starter
Supreme Member
Joined: Oct 2001
Posts: 3,155
Likes: 2
From: Louisville, Ky
Car: 1991 Z28
Engine: 383
Transmission: T-5
Axle/Gears: 3.08 10 Bolt
i bought brackets some company made for me. i forget the company but they were like $160 and they took the car and seats i had and made custom brackets
Thread
Thread Starter
Forum
Replies
Last Post





