Roll bar kit ........ finished
- Thread starter TrentNell
- Start date
Trent, the side bars need to cross over your elbow height while holding the wheel, if I'm remembering right. I don't have my rule book here.
Nice work!
I will have to check the book , only problem is that seems awful high i went and sat in the truck to check and it would have to be raised a foot maybe a touch more , i looked at alot of pics and dont remember any being that high ?
looking at some older rules it does state that the side bar has to pass between the shoulder and elbow , not hard to change I just sure wish my rule book would show soon . I figured a "kit" would have a detail like that covered 
oh well couple sticks of DOM will fix it right up . Thanks for the heads up Rob :hug:
oh well couple sticks of DOM will fix it right up . Thanks for the heads up Rob :hug:
Trent,
They don't certify rollbar's to my knowledge. It is up to each track you go to
Ya i seen that in the rule book after , I only ground a few high spots and didnt make the weld any thinner but it clearly says its not allowed so ......... I only did the one bar ( drivers ) it needs to be replaced any way so it should"nt matter here is some info i have gathered from the rule book , all of the rest besides the drivers side bar looks to be OK .
All roll bars must be within 6 inches of the rear, or side, of the
driver’s head, extend in height at least 3 inches above the driver’s
helmet with driver in normal driving position or be within 1 inch of
the roof/headliner in the area above the driver's helmet, and be at
least as wide as the driver's shoulders or within 1 inch of the
driver's door. Roll bar must be adequately supported or crossbraced
to prevent forward or lateral collapse. Rear braces must be of the same diameter and wall thickness as the roll bar and
intersect with the roll bar at a point not more than 5 inches from the
top of the roll bar. Crossbar and rear braces must be welded to
main hoop. Sidebar must be included on driver’s side and must
pass the driver at a point midway between the shoulder and elbow.
Swing-out sidebar permitted. All roll bars must have in their
construction a cross bar for seat bracing and as the shoulder
harness attachment point; cross bar must be installed no more than
4 inches below, and not above, the driver’s shoulders or to side bar.
All vehicles with OEM frame must have roll bar welded or bolted to
frame; installation of frame connectors on unibody cars does not
constitute a frame; therefore it is not necessary to have the roll bar
attached to the frame. Unibody cars with stock floor and firewall
(wheeltubs permitted) may attach roll bar with 6-inch x 6-inch x
.125-inch steel plates on top and bottom of floor bolted together
with at least four 3/8-inch bolts and nuts, or weld main hoop to
rocker sill area with .125-inch reinforcing plates, with plates welded
completely. All 4130 chromoly tube welding must be done by
approved TIG heliarc process; mild steel welding must be done by
approved MIG wire feed or approved TIG heliarc process. Welding
must be free of slag and porosity. Any grinding of welds prohibited.
See illustration. Roll bar must be padded anywhere driver’s helmet
may contact it while in driving position. Adequate padding must
have minimum 1/4-inch compression or meet SFI Spec 45.1. All
cars running 180 mph or faster, SFI Spec 45.1 mandatory.
4:11 ROLL CAGE
All cage structures must be designed in an attempt to protect the
driver from any angle, 360 degrees. All 4130 chromoly tube welding
must be done by approved TIG heliarc process; mild steel tube
welding must be approved MIG wire feed or TIG heliarc process.
Welding must be free of slag and porosity. Any grinding of welds
prohibited. Plating of chassis prohibited for all cars manufactured
after Jan. 1, 2003, unless otherwise noted in Class Requirements;
painting permitted. Additionally, roll cage must be padded anywhere
the driver’s helmet may contact it while in the driving position. For
Advanced E.T., Comp, Top Alcohol Dragster, Top Alcohol Funny
Car, Pro Stock, Funny Car, Top Fuel, and any car running 180 mph
or faster, padding must meet SFI Spec 45.1. Refer to illustrations in
Section 4:11 as well as specific Class Requirements for the
6" max
All cars with an OEM frame must
have roll bar attached to frame.
Cars without frame use 6" square
1/8" steel plates on top and
bottom of floor, securely bolted
together with at least four 3/8"
bolts, or top plate welded to
rocker sill.
Maximum of 6"
from roll bar to
driver’s helmet.
Maximum of 5"
from top of roll
bar to brace.
All materials must be 1 3/4" O.D. x .118" mild steel or .083"
4130 chromoly tubing, except A, which is
1 1/4" O.D. x .118" mild steel or .065" 4130 chromoly tubing.
5" max
4:11 Roll Cage
All cage structures must be designed in an attempt to protect the
driver from any angle, 360 degrees. All 4130 chromoly tube welding
must be done by approved TIG heliarc process; mild steel tube
welding must be approved MIG wire feed or TIG heliarc process.
Welding must be free of slag and porosity. Any grinding of welds
prohibited. Plating of chassis prohibited for all cars manufactured
after Jan. 1, 2003, unless otherwise noted in Class Requirements;
painting permitted. Additionally, roll cage must be padded anywhere
the driver’s helmet may contact it while in the driving position. For
Advanced E.T., Comp, Top Alcohol Dragster, Top Alcohol Funny
Car, Pro Stock, Funny Car, Top Fuel, and any car running 180 mph
or faster, padding must meet SFI Spec 45.1. Refer to illustrations in
Section 4:11 as well as specific Class Requirements for the applicable e.t. and body-style roll-cage requirements. Open-bodied
cars running 9.99 and quicker and/or faster than 135 mph must
meet applicable SFI Specification for e.t. (see Class Requirements).
Full-bodied cars running 8.49 and quicker and/or exceeding 180
mph must meet applicable SFI Specification for e.t. and weight (see
Class Requirements). SFI Specifications may be purchased from
the SFI Foundation (sfifoundation.com, 858-451-8868); SFI
Specifications are not available from NHRA Technical Services.
Last edited:
Trent,
They don't certify rollbar's to my knowledge. It is up to each track you go to
Thats good to know , I know a few guys that did cert there's unless i am mistaken so it probably a good idea if they will ( i will call ) especially if you travel to race , 1000 miles is far to drive if you were to get sent away
Last edited:
I'm fairly sure you only have to have a NHRA tech come out and certify the bar/cage if you're faster than a certain speed. Not sure on what the break is though.
Last edited:
I will get some pics up this weekend , the kit came with "outriggers" to use basically rectangle tubing welded to the frame and the bar welded to the rectangle tubing .
I am going to give there tech line a call tomorrow and find out what the deal is .
It would be nice if you could get it certified once by a NHRA tech then not have to worry about it at every track.
Nice Job.:thumb: You might think of adding from the floor by the e brake pedal, up the A-pillar to roof and back to the main hoop, and connect both along the top of the windshield ,will keep the A - pillar from crushing, and then the bar along the door would go from the base of the new A-pilalar bar to were it is know on the main hoop. . and a X-Bar behind the seat. Hope this helps.
Going 12's or 9's same thing happens if you roll, the a pillar crushes down. Better safe while he is doing it.
I won't argue the safety aspect, but most people (including myself) don't even want to put a bar in their truck. A cage is even worse.
Cage needs to be certified. Need a cage when ET is quicker than 10.00.
Even with a NHRA cert. sticker, tech is still at the discretion of the officals at the track. They have the final say.
Trent, you'll need a tranny blanket if going faster than 10.5, not sure about sfi balancer and flex plate and when they are required. I know we need them. Div.6 NHRA top tech guy have given me the OK on our stock rear axles making the rules.
Tech really comes down to the individual offical. Some go over everything with a fine tooth comb, others glance and send you on your way.
Even with a NHRA cert. sticker, tech is still at the discretion of the officals at the track. They have the final say.
Trent, you'll need a tranny blanket if going faster than 10.5, not sure about sfi balancer and flex plate and when they are required. I know we need them. Div.6 NHRA top tech guy have given me the OK on our stock rear axles making the rules.
Tech really comes down to the individual offical. Some go over everything with a fine tooth comb, others glance and send you on your way.