We just finished this 4-point chromoly roll bar up for triple_s1x's 2005 Subaru WRX STi. It has a main hoop with an X-brace, two down bars with an X-brace and 6 dimple die'd gussets on the main hoop X-brace. All made out of 1 3/4" x .095" 4130 using ER80S-D2 3/32" filler and 2% Thoriated Tungsten.

For more pictures - http://www.didrace.com/gallery...2.htm

If pictures don't show up you might have to hit the 'Refresh' button. Our server is slightly handicapped when linking to it.

Test fitting the rear strut tower plates.


Test fitting the floor plates for the main hoop.


The main hoop X-brace all welded up.


Dimple die'd gussets cut, formed, drilled, dimpled and tacked in place.


All finished up.






Interior put back in by triple_s1x.


Cigarette break.


The outside of the car all finished up.




Modified by david@didrace.com at 7:08 PM 3/14/2007

 

SICKNESS

 

I wanna see someone sit in the center back seat

looks amazing btw

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRXDrew &raquo;</TD></TR><TR><TD CLASS="quote">I wanna see someone sit in the center back seat

looks amazing btw</TD></TR></TABLE>


Thats where I'm putting my baby seat... :insert dead baby joke here..

 

WOW I ******* LOVE IT.

 

Nice work, what machine do you use for the dimple die's.

 

you dont use a machine you use a press and the dies

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Synapse Motorsport &raquo;</TD></TR><TR><TD CLASS="quote">Nice work, what machine do you use for the dimple die's.</TD></TR></TABLE>

A hole saw, dimple die set and a press.

 

Same set I have those things are heavy duty

 

looks nice man, good job!

 

man thats some sick fab work, but if that suby aint sportin a gt4294 and about 35 pounds a' boost he would get whored where i live.

what is gonna be the use of the car?

 

Damn that looks nice. Great job Dave.

Can i put my sexy cheescake juice on it?

 

 

great success high five

 

Nice fab work. I hope the cage isn't going to be used in SCCA events. Your tube size is too small.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mrbsponge &raquo;</TD></TR><TR><TD CLASS="quote">

what is gonna be the use of the car?</TD></TR></TABLE>


picking up school girls in the school zone.

Why would a road race car need a gt42? More of a 35r type guy myself, I'll settle for 550whp any day


Modified by triple_s1x at 9:14 AM 3/15/2007

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turboteener &raquo;</TD></TR><TR><TD CLASS="quote">Nice fab work. I hope the cage isn't going to be used in SCCA events. Your tube size is too small.</TD></TR></TABLE>

taken from SCCA rule book.

M.4: ROLL CAGE STRUCTURE MINIMUM TUBING SIZES
Vehicle Material
Weight Mild Steel Alloy Steel
Up to 1500 Ibs. 1.375x.095 1.375x.080
1501 to 2499 Ibs . 1.500x.095 1.500x.095
2500 lbs. & Up 1.750x.095 1.750x.095

 

The pics did not load for me, but just for the sake of h-t I'm going to say it won't pass tech

I'm sure it looks great, once I could see the pics

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RCautoworks &raquo;</TD></TR><TR><TD CLASS="quote">The pics did not load for me, but just for the sake of h-t I'm going to say it won't pass tech

I'm sure it looks great, once I could see the pics</TD></TR></TABLE>

Hit refresh like he said in the orignial post. Bob you really need to get off that crack its consuming you

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dr.NAPIER &raquo;</TD></TR><TR><TD CLASS="quote">

Hit refresh like he said in the orignial post. Bob you really need to get off that crack its consuming you</TD></TR></TABLE>

who reads, I just look at pics

Cage looks amazing

 

Looks great man! One thing though...maybe it wont fit you as well as it does me, but 3/32 filler is awfully big for the .095 4130. Thats why your "dimes" arent all consistent. On .095 your probably only using 100-120 amps right? 1/16" would be this biggest Id use, but would prefer .045". That smaller filler is nice because it melts so much easier and doesnt stick in the puddle. Yeah, you use more of it, but its appearance vs. how often you have to grab another piece...not that big of deal if you ask me.
Anyways...defenitely not bashing you at all. Fab work looks incredible! Love the gussets.
Kyle

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by triple_s1x &raquo;</TD></TR><TR><TD CLASS="quote">

taken from SCCA rule book.

M.4: ROLL CAGE STRUCTURE MINIMUM TUBING SIZES
Vehicle Material
Weight Mild Steel Alloy Steel
Up to 1500 Ibs. 1.375x.095 1.375x.080
1501 to 2499 Ibs . 1.500x.095 1.500x.095
2500 lbs. & Up 1.750x.095 1.750x.095</TD></TR></TABLE>

This only applies to full Roll Cages, not four point ROLL BARS. Here is specs for SCCA level 3 and 4 Time Trial roll bar requirements:
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">
18.3 MATERIAL
A. The roll bar hoop and braces must be seamless, ERW or
DOM mild steel tubing, or chrome molybdenum alloy steel such
as SAE 4125 or SAE 4130. It is recommended that mild steel
tubing be used as a chromium alloys present difficulties in
welding and must be normalized to relieve stress. Proof of the
use of alloy steel will be the responsibility of the entrant.
B. For the purpose of determining tubing sizes, the vehicle
race weight is without driver. The size of the tubing shall be
determined as follows:
Vehicle Roll Bar
Race Weight Size Material
Under 2000 lbs 1.500 x .120 Mild Steel
2001-3500 lbs 1.750 x .120 Mild Steel
Over 3500 lbs 2.000 x .120 Mild Steel
Under 1500 lbs 1.375 X .090 Alloy Steel
1501-2500 lbs 1.625 X .095 Alloy Steel
Over 2500 lbs 2.000 X .095 Alloy Steel
</TD></TR></TABLE>

FOr Road racing you are not allowed to run a simple roll bar arrangement. If it is built to SCCA Solo 2 rules then you are right. But if you built it for anything else, you better check with your local Tech inspector for legality. It would suck to show up at an event and have it declared illegal.

 

Hey david@didrace.com,
Very nice work! I dig it!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turboteener &raquo;</TD></TR><TR><TD CLASS="quote">FOr Road racing you are not allowed to run a simple roll bar arrangement.</TD></TR></TABLE>

Right now it's just an over complicated harness bar that will be turned into a full roll cage next winter. Thanks for looking out though.


Modified by david@didrace.com at 10:01 AM 3/16/2007

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by david@didrace.com &raquo;</TD></TR><TR><TD CLASS="quote">

Right now it's just an over complicated harness bar that will be turned into a full roll cage next winter. Thanks for looking out though.


Modified by david@didrace.com at 10:01 AM 3/16/2007</TD></TR></TABLE>

how do you plan on welding the tops of the forward bars after the main hoop is welded in the car?