# 914 Cage repair, I assume this needs replaced

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Am I correct in thinking that this main hoop would need replaced completely due to the hole where the door bar was attached?

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Why was it removed? And where are you putting the replacement and what style?

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Not my car, was just looking at it and considering what it might need to bring up to date.  It's a 74 914.....  I've got a couple of spare flat sixes because I seem to collect junk....  Even with the current swap rules, a 1971 2.2 911E engine at 155 hp would swap in for 68 points and that engine has the same heads, valves and forged crank as the S.  Also has the Bosch MFI  so you could go a couple of ways, home port the heads and use bigger cams, or...... for another 100 points,,,,, turbo that sucker....  just exploring and thinking.  For the same money though you could build a lot of other stuff that would be pretty fast as well....

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Wait....so the main hoop was cut to place the door bar in it? Am I seeing that right?

I would feel pretty sketchy about an interrupted (non continuous tube) for the main hoop. That is beyond the legality of it. You want the main hoop to be as strong an element as possible against buckling (roll over), and cutting it apart and putting another hollow element in the hoop isn't going to help that.

If the hole is some remaining part of a door bar tube end, I have successfully ground down the weld\end of door bars. You need to be careful and don't grind into the main hoop, you want full cross section of the main hoop left when you are done (like nothing was ever welded to it). The main hoops I have cleaned up were very close to 1 3/4 OD after the grinding, I think within a tenth. Taking your time helps.

(Edited to tenth....meaning .010, i wrote it as .100).

Edited by Black Magic
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3 hours ago, Black Magic said:

Wait....so the main hoop was cut to place the door bar in it? Am I seeing that right?

I would feel pretty sketchy about an interrupted (non continuous tube) for the main hoop. That is beyond the legality of it. You want the main hoop to be as strong an element as possible against buckling (roll over), and cutting it apart and putting another hollow element in the hoop isn't going to help that.

If the hole is some remaining part of a door bar tube end, I have successfully ground down the weld\end of door bars. You need to be careful and don't grind into the main hoop, you want full cross section of the main hoop left when you are done (like nothing was ever welded to it). The main hoops I have cleaned up were very close to 1 3/4 OD after the grinding, I think within a tenth of so of an inch. Taking your time helps.

Uh, a tenth of an inch could be the entire wall if it is .095"

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I would cut it out and start from scratch.   Craftsmanship looks a bit sub par.  When in doubt don't risk your life on a couple sticks of tubing.  If the cage fits the car well it could be used as a template

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Yea looks like it was welded with a torch and some coat hangers as filler rod. (Yes I have done it before lol)

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3 hours ago, wvumtnbkr said:

Uh, a tenth of an inch could be the entire wall if it is .095"

Or double the thickness, I would be more comfortable with a flap wheel leaving what I know is the last of the weld as a bump than risking grinding into the tube.

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11 hours ago, 67Mustang said:

Not my car, was just looking at it and considering what it might need to bring up to date.  It's a 74 914.....  I've got a couple of spare flat sixes because I seem to collect junk....  Even with the current swap rules, a 1971 2.2 911E engine at 155 hp would swap in for 68 points and that engine has the same heads, valves and forged crank as the S.  Also has the Bosch MFI  so you could go a couple of ways, home port the heads and use bigger cams, or...... for another 100 points,,,,, turbo that sucker....  just exploring and thinking.  For the same money though you could build a lot of other stuff that would be pretty fast as well....

Don’t forget about the $2500 engine swap rule for next year. ##### Link to comment ##### Share on other sites I hadn't seen that yet! ##### Link to comment ##### Share on other sites TDI swap, auto trans, bigger turbo, intercooler, points left over for aero and suspension. ##### Link to comment ##### Share on other sites 3 hours ago, Ronh911 said: Don’t forget about the$2500 engine swap rule for next year.

So much for limiting costs and speed creep.

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14 hours ago, 67Mustang said:

Not my car, was just looking at it and considering what it might need to bring up to date.  It's a 74 914.....  I've got a couple of spare flat sixes because I seem to collect junk....  Even with the current swap rules, a 1971 2.2 911E engine at 155 hp would swap in for 68 points and that engine has the same heads, valves and forged crank as the S.  Also has the Bosch MFI  so you could go a couple of ways, home port the heads and use bigger cams, or...... for another 100 points,,,,, turbo that sucker....  just exploring and thinking.  For the same money though you could build a lot of other stuff that would be pretty fast as well....

The picture I included was one I found of a 914 cage to provide a comparison with what your picture shows.

Like others, I'm concerned about the columnar strength being compromised by the hole. Best bet is to start over.  Another concern is a front mounted cell, I had that option with my Fiero but I felt safer with the cell sitting beside me, inside the cage and NASCAR bars. Also, change in fuel load has minimal effect on handling when the cell is at or near the C of G of the car.

Certainly some potential there though, light weight and big fuel tank plus Porsche parts could be fun!

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8 hours ago, mender said:

So much for limiting costs and speed creep.

This was discussed during the board meeting @ Charlotte, not only that, they clarified auto trans to have a torque convertor.

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On 8/30/2019 at 7:42 AM, 67Mustang said:

Not my car, was just looking at it and considering what it might need to bring up to date.  It's a 74 914.....  I've got a couple of spare flat sixes because I seem to collect junk....  Even with the current swap rules, a 1971 2.2 911E engine at 155 hp would swap in for 68 points and that engine has the same heads, valves and forged crank as the S.  Also has the Bosch MFI  so you could go a couple of ways, home port the heads and use bigger cams, or...... for another 100 points,,,,, turbo that sucker....  just exploring and thinking.  For the same money though you could build a lot of other stuff that would be pretty fast as well....

Is one of those sixes a 2.0? If so, you can build yourself a 914/6 and not get any engine swap points.

You would also get the 26.4 gallon fuel tank for the extra 50 points that the 914/6 is over the 914/4. That's only 5 points per gallon! But I guess one could argue that the 914/4 should also get the 26.4 gallon tank, just like the E30s and Miatas are allowed to use the biggest tank available for no points. Gotta be fair to everyone!

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On 8/30/2019 at 4:24 PM, wvumtnbkr said:

Uh, a tenth of an inch could be the entire wall if it is .095"

I butchered writing that... I meant within a tenth....like ten thousands, and instead wrote it as .100 vs .010.

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Looking at the rest of the cage, it looks iffy, the joint at the top where the front halo bar comes in just looks off.  Maybe its the picture angle not sure.

Mender is right though, I like the HUGE tank for the 914-6.  If I claim it as the 2.0 914-6, no need to worry about swap points,  I take the 26.4 gal tank all for the 300 points.  And, since it's a -6, I get the 911 brakes, front suspension, and 5 lug set up for free.  Poly bushings all around, raise the spindles the std 18 mm on the strut,  space for bump steer...  still at 300 pts...  lets see.... TURBO, +100, intercooler + 25, second oil cooler +20, throttle body, 25 pts.  Port the heads stock cams.... I think is about 470 points.  No rear sway bar , stock bar up front.  Springs free, brakes, wheels free..  Wing/splitter/airdam + 30........ = 500 pts...

With this the \$2500 swap max goes out the window...

I know I am missing something  couldn't be that easy.

Edited by 67Mustang
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I'm betting some here know of this particular turbo 914/6 from the late 70's out west.  Wicked wing too

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I’m 99.9% positive 914/6s did not come with the big tank from the factory. They had the same tank as a 914/4.  914/6 GT could be had with the big tank.

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Well, the 100 liter tank is straight up option 436 and the flares are M471. Both were Homologated by the SCCA...

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I would love for you to build it and hate to have to protest it.

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you would actually raise the spindles..

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you would actually raise the spindles..

Yup you are correct!

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5 hours ago, Ronh911 said:

I would love for you to build it and hate to have to protest it.

Ahhh... Don't be like that lol  What's a little K36 among friends!!  It would still be pretty entertaining even at 16.4 Plus 2...  Nothing to protest there....  I guess if it were a Bimmer I could get away with running the big tank huh??

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• 67Mustang changed the title to 914 Cage repair, I assume this needs replaced

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