Bostonian 71 demon

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No real progress on the car the last couple days been sick, but I did manage to paint and cure the blow sheild while taking it easy at home

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I understand you are trying to recreate an appearance of a certain era, but there are some things on your cage I would have modified for a safer and more robust design.

One area is the rear strut tubes. I would have tied them in closer to the bend on the main hoop to tie in with the halo and angled them at a 45* to create more stable triangulation.

The engine bay tubes intersecting the joining interior tube in the middle of a long run with no other triangulation to support them is also concerning. I would have mounted them up higher to intersect with the bend in the front tube and then tied in a dash bar across the width of the cage and an additional door bar to X the uprights together.

I know NHRA doesn't specifically call out these as requirements in advanced E.T. categories, but these items are pretty standard features built into most cages these days. These design details are called out by other, non-drag race sanctioning bodies as a standard design principle. Not sure an NHRA inspector would call you out on them but it would really suck to get one telling you to change these after construction is complete. You might consider sharing a picture with an inspector before you finish just to get their take on it.
 
HPP said:
I understand you are trying to recreate an appearance of a certain era, but there are some things on your cage I would have modified for a safer and more robust design.

One area is the rear strut tubes. I would have tied them in closer to the bend on the main hoop to tie in with the halo and angled them at a 45* to create more stable triangulation.

The engine bay tubes intersecting the joining interior tube in the middle of a long run with no other triangulation to support them is also concerning. I would have mounted them up higher to intersect with the bend in the front tube and then tied in a dash bar across the width of the cage and an additional door bar to X the uprights together.

I know NHRA doesn't specifically call out these as requirements in advanced E.T. categories, but these items are pretty standard features built into most cages these days. These design details are called out by other, non-drag race sanctioning bodies as a standard design principle. Not sure an NHRA inspector would call you out on them but it would really suck to get one telling you to change these after construction is complete. You might consider sharing a picture with an inspector before you finish just to get their take on it.
Click to expand...
So the rear half of the cage is completely being redone the front I still have to put the triangulation bars upward to the strut supports, but I’m not doing those until the dashboard is back in temporarily to figure out my exact spacing
 
B.R.E.Demon said:
So the rear half of the cage is completely being redone the front I still have to put the triangulation bars upward to the strut supports, but I’m not doing those until the dashboard is back in temporarily to figure out my exact spacing
Click to expand...

Gotcha, that makes sense.
 
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