My Boxster Spec cage
#1
Rennlist Member
Thread Starter
My Boxster Spec cage
The cage in my '99 986 is almost done,...FINALLY!
My builder is Kenny Conway (www.conwayautoworks.com). He is the guy who also did Charlie and Colin's cages. While I am no expert, I think Kenny's work is amazing both from design and execution points of view. His TIG welds are perfection!
In the pics shown here, the door bars and harness bars are still absent. Also some of the welds around the floor plates and the rear shock towers need to be finalized.
Just thought I'd post a few pics to share my excitement. If my recent neck injury doesn't hold me back, I'll have the inaugural cruise at Monticello in 3 weeks!
My builder is Kenny Conway (www.conwayautoworks.com). He is the guy who also did Charlie and Colin's cages. While I am no expert, I think Kenny's work is amazing both from design and execution points of view. His TIG welds are perfection!
In the pics shown here, the door bars and harness bars are still absent. Also some of the welds around the floor plates and the rear shock towers need to be finalized.
Just thought I'd post a few pics to share my excitement. If my recent neck injury doesn't hold me back, I'll have the inaugural cruise at Monticello in 3 weeks!
#5
Rennlist Member
Kenny does amazing work. I drove 23 hours to get my cage done by him. No grinding on those welds, he's that good! He also prides himself on making the cage tight to the structure and roofline which is a real plus in the headroom challenged Boxster.
#6
5 bends in main hoop ?
Is it made from 1 size larger than required ?
That is the rule in NASA CCR,with prior approval from tech, should you plan on racing it there. Not sure of PCA's rule on this off the top of my head.
Is it made from 1 size larger than required ?
That is the rule in NASA CCR,with prior approval from tech, should you plan on racing it there. Not sure of PCA's rule on this off the top of my head.
#7
Nordschleife Master
In NASA you are allowed more bends in the main if you use the next size up in the table. Since these cars are under 2500lbs, the "normal" tube size is 1.5 x 0.095 DOM. In this case the main is 1.5 x 0.120 DOM. So short answer is that its legal. Here's the specific language in the rule book.
15.6.19 Bending Allowances
If the maximum number of bends permitted for any one bar is exceeded, all required components shall be made from the tubing size listed for the next heavier category and must be approved by a NASA race tech shop or scrutineer.
15.6.18 Roll Cage Tubing Sizes
For the purposes of determining roll bar tubing sizes, vehicle weight is as raced, but without fuel and driver. Note: There is an allowance of minus 0.010 inches on all tubing thicknesses. Minimum tubing size for the roll cage is:
1501 - 2500 lbs.
1.500” x 0.095” Chrome-moly / Seamless mild steel (CDS or DOM)
2501 - 3000 lbs.
1.500” x 0.120” Chrome-moly / Seamless mild steel (CDS or DOM)
1.750” x 0.095” Chrome-moly / Seamless mild steel (CDS or DOM)
...
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#9
Nordschleife Master
Btw, I will take some pictures of my cage, but I have to say, Kenny's (www.conwayautoworks.com) work is amazing. I've seen some pictures of amazing bad welding recently, which make me appreciate Kenny's work all the more. Even his MIG welds on the base plates are a thing of beauty.
#10
Nordschleife Master
#13
Yeah I couldn't tell from the pics what size it was, especially the thickness ; )
+1 on the recent cage weld pics I have seen around here !
+1 on the recent cage weld pics I have seen around here !
PCA does not specify the number of bends.
In NASA you are allowed more bends in the main if you use the next size up in the table. Since these cars are under 2500lbs, the "normal" tube size is 1.5 x 0.095 DOM. In this case the main is 1.5 x 0.120 DOM. So short answer is that its legal. Here's the specific language in the rule book.
15.6.19 Bending Allowances
If the maximum number of bends permitted for any one bar is exceeded, all required components shall be made from the tubing size listed for the next heavier category and must be approved by a NASA race tech shop or scrutineer.
15.6.18 Roll Cage Tubing Sizes
For the purposes of determining roll bar tubing sizes, vehicle weight is as raced, but without fuel and driver. Note: There is an allowance of minus 0.010 inches on all tubing thicknesses. Minimum tubing size for the roll cage is:
1501 - 2500 lbs.
1.500” x 0.095” Chrome-moly / Seamless mild steel (CDS or DOM)
2501 - 3000 lbs.
1.500” x 0.120” Chrome-moly / Seamless mild steel (CDS or DOM)
1.750” x 0.095” Chrome-moly / Seamless mild steel (CDS or DOM)
...
In NASA you are allowed more bends in the main if you use the next size up in the table. Since these cars are under 2500lbs, the "normal" tube size is 1.5 x 0.095 DOM. In this case the main is 1.5 x 0.120 DOM. So short answer is that its legal. Here's the specific language in the rule book.
15.6.19 Bending Allowances
If the maximum number of bends permitted for any one bar is exceeded, all required components shall be made from the tubing size listed for the next heavier category and must be approved by a NASA race tech shop or scrutineer.
15.6.18 Roll Cage Tubing Sizes
For the purposes of determining roll bar tubing sizes, vehicle weight is as raced, but without fuel and driver. Note: There is an allowance of minus 0.010 inches on all tubing thicknesses. Minimum tubing size for the roll cage is:
1501 - 2500 lbs.
1.500” x 0.095” Chrome-moly / Seamless mild steel (CDS or DOM)
2501 - 3000 lbs.
1.500” x 0.120” Chrome-moly / Seamless mild steel (CDS or DOM)
1.750” x 0.095” Chrome-moly / Seamless mild steel (CDS or DOM)
...
#14
Just my opinion, take it for what you paid for it.
#15
Rennlist Member
Thread Starter
I'm glad I posted....I'm learning alot about my cage!