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914World.com _ Member Vendors _ New GT Half Cage

Posted by: McMark Nov 28 2010, 12:20 PM

I'm got a tubing bender to make a replica GT half cage for a customer car. This is the style of bolt in cage used on some of the GT cars pictured on Armando's AWESOME GT site, as well as the style used in the PMB GT.

Material is mandrel bent 1.75" DOM 0.95", notched and will be completely welded. Plates are laser cut steel, ensuring they look great and fit perfectly. You will be required to weld the provided receiver plates onto your longs.

These cages will keep the seats from moving all the way back because of the center brace bars. I have some ideas that will adapt the cage to work better with stock seats. PM me for details. Also, these cages will obviously not work with a stock backpad, nor the door handle/pocket.

Each cage will be $xxx in bare steel, with powdercoating available. Shipping is possible, we're probably looking at crate and freight shipping, which should be around $175 (give or take $25). Cages are built to order.
--Optional Item 1-- Leave off the two bars going to the center hump. This would let you keep the backpad and knock $xxx off the price.
--Optional Item 2-- Leave off the forward/door bars. These add a lot of rigidity, but make getting in and out of the car harder. Leave these off and knock $xx off the price.
You can combine both options for just a hoop, priced at $xxx + shipping.
Custom alterations are also available at full shop rate of $125/hr for actual time spent beyond the building of the standard cage.

These cages are now special order. Contact me for details.
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Installation Info:
1. Use a jack on both sides of the car, in the middle of car (between the wheels) with slight pressure simply to counteract the weight of the car. If you think about the way the weight is distributed, it's split between four wheels roughly equally. You're using the jack to try and distribute the weight six ways evenly. If you lift too much in the middle, you're changing the bias. This is not an exact science or setting. You just have to use your best judgement.

2. Test and measure the door gaps and opening closing effort before and during the welding process. Also measure between the targa bar and the windshield hoop, using the attached picture. Anything within 2-3mm is considered correct. But keep checking that measurement as you weld to make sure things aren't moving.

3. Do not run a bead longer than 1" ever on any joint. Long continuous welds are how cars get warped.

4. If you're using the bolt-in setup, weld the base plates in while they are bolted to the cage. Welding the base plates with the cage fully assembled ensures that everything lines up.

5. Get the cage to sit correctly, fully assembled, before fully welding a single piece. You cannot adjust things as you go. Get them all lined up, sitting flat, etc before you start permanently attaching things.

6. Tack weld the forward bars to the main hoop first, but fully weld the rear bottom plates first. Then weld the forward bottom plates and the forward bars to the main hoop at the same time. A little weld on each bottom plate, a little weld on the forward bar joint, then a little time to let things cool off. Then repeat.

7. Leave time for welds to cool completely between steps. This can seem long and tedious and it's REALLY hard to slow down and take your time. Ideally you'll have 30m of welding time spread out over 1.5-2h. More cooling time reduces the risk of warping the car and you can't let it cool too much. The times I just mentioned allow the welds to cool at the rate of 2-3m cooling for each minute of welding time.

8. Read #5 again. Good installs require good prep. The quality and success of your install ALL happens before you pick up the welder.

Good luck. welder.gif


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Posted by: pete-stevers Nov 28 2010, 01:07 PM

looks great!!!

Posted by: Mark Henry Nov 28 2010, 01:16 PM

If you also offered this raw without the brace bars welded in (DYI) it could save peeps a lot in shipping. Flat box might be UPS shippable.
Looks nice.

Posted by: Eric_Shea Nov 28 2010, 01:30 PM

I'll give testimony. When this cage is bolted in, your car changes.

The side bars extend along your longitudinals to the base of the A-Pillar tieing that area into the back wall and original targa hoop.

Great vintage look. The GT V-Bar is amazing in my book.

I also think this should be kit for for a few reasons:

1) It should be tacked and built in the vehicle (then removed, powder coated etc.).
2) Shipping.

Are you planning on including scab plates?

Posted by: Brett W Nov 28 2010, 02:31 PM

Mark, you may want to check on a waiver or certs for SCCA and NASA, so that can expand your market to allow the time trial people to get in on this.

Posted by: McMark Nov 28 2010, 02:58 PM

This would include scab plates and all hardware. The complete package. I could do a partially welded kit to save on shipping idea.gif The cage would cost the same, but it might save $100 on shipping.

Brett - I haven't heard of these. Do you have more info or a link?

Posted by: JmuRiz Nov 28 2010, 03:49 PM

Could/would you make one with the angled side-bars that are removable...so you can take them out for street driving? Would it still be stiff? Also would it be beneficial to add a Perry or Engman long stiff kit along with this?

Man I need a new job so I can afford this! I'll do some figuring and get back to you.

Posted by: mepstein Nov 28 2010, 03:52 PM

Everything I have heard says you shouldn't use a cage in a street car.

Posted by: Racer Chris Nov 28 2010, 04:01 PM

It's really a roll bar, not a cage. None of the bars in this design present the danger of side hoops and windshield crossbar of a full cage.

Posted by: Randal Nov 28 2010, 04:23 PM

QUOTE(Racer Chris @ Nov 28 2010, 02:01 PM) *

It's really a roll bar, not a cage. None of the bars in this design present the danger of side hoops and windshield crossbar of a full cage.




Absolutely right as usual Chris.

The danger of having a cage in a car is the front top bar and side top bars, neither of which Mark's combination roll bar contain.

Mark is making up a sticker, "Safe for the Street." laugh.gif

Posted by: URY914 Nov 28 2010, 04:27 PM

Shipping the side bars loose would be a good thing to do. You could tape them to the main piece and ship them w/o a problem. No box required.

Posted by: Racer Chris Nov 28 2010, 05:32 PM

QUOTE(URY914 @ Nov 28 2010, 05:27 PM) *

No box required.

FedEx and UPS have a hefty surcharge for items that are not boxed, in addition to the oversize charges for an item as large as a main roll hoop. OTOH, making a suitable box is time consuming.
If the forward braces of the "half cage" are pre-installed the shipping charges will be even higher.
I can currently ship a basic full cage kit which weighs 65lbs to CA for about $140. That includes all my direct costs and a little bit for time spent with packaging.

Posted by: RobW Nov 28 2010, 05:36 PM

aktion035.gif w00t.gif idea.gif




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Posted by: ONTHEGRIND Nov 28 2010, 06:26 PM

Do I get a napa valley discount if so Im in..

Posted by: plymouth37 Nov 28 2010, 07:37 PM

Looks great!

Posted by: 9146BRUCE Nov 28 2010, 07:43 PM

Hi Mark if the setup you will make is like the one in the picture and the one Eric made I will take one how do you want me to pay. where do you live I could drive up and pick it up when I go up to Weidmans with some wheels.

Bruce

Posted by: Maltese Falcon Nov 28 2010, 07:49 PM

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McMark, if you get to where you need a small production run on the bent section let me know. We are always able to run several mandrel benders on different sizes. Pricing is not in the stratosphere smile.gif
Marty

Posted by: McMark Nov 28 2010, 08:00 PM

Bruce, you have a PM! biggrin.gif

I need one more person to sign up for this to move forward.

Posted by: Zimms Nov 28 2010, 08:13 PM

QUOTE(Eric_Shea @ Nov 28 2010, 02:30 PM) *

I'll give testimony. When this cage is bolted in, your car changes.

The side bars extend along your longitudinals to the base of the A-Pillar tieing that area into the back wall and original targa hoop.

Great vintage look. The GT V-Bar is amazing in my book.

I also think this should be kit for for a few reasons:

1) It should be tacked and built in the vehicle (then removed, powder coated etc.).
2) Shipping.

Are you planning on including scab plates?


Would you recommend going this route versus a long strengthening kit to tighten up the frame or would both help?

How much of a pain in the ass is it to get in and out with the side bar of the cage? I am 6ft, 220#.

Posted by: moparrob Nov 28 2010, 08:13 PM

Awesome! Good luck with it. beer.gif

Posted by: SirAndy Nov 28 2010, 08:22 PM

QUOTE(Zimms @ Nov 28 2010, 06:13 PM) *
How much of a pain in the ass is it to get in and out with the side bar of the cage? I am 6ft, 220#.

It's actually EASIER than without. You can use the sidebar to push yourself up when getting out of the car ...

shades.gif Andy

Posted by: McMark Nov 28 2010, 08:23 PM

QUOTE(JmuRiz @ Nov 28 2010, 01:49 PM) *

Could/would you make one with the angled side-bars that are removable...so you can take them out for street driving? Would it still be stiff? Also would it be beneficial to add a Perry or Engman long stiff kit along with this?

Man I need a new job so I can afford this! I'll do some figuring and get back to you.

Nathan,

We might be able to do something with these.
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It'll add some cost though and sacrifice some rigidity, and probably aren't smart for actual track safety.

Posted by: ConeDodger Nov 28 2010, 08:24 PM

Mark,
Get a hold of Elliot Cannon. His door bar in the yellow car is an outstanding modification that can make these much easier to get in and out of with a street car.

Posted by: jmill Nov 28 2010, 08:57 PM

Looks bada$$. wub.gif

Posted by: rick 918-S Nov 28 2010, 09:50 PM

Nice idea Mark. The GT bar is a nice looking design.

Posted by: ottox914 Nov 28 2010, 10:30 PM

McMark: waddya think of this? The 914T currently has the Brad Mayeur heavy duty outer long kit installed. It was not installed to repair ANY structural rust or rot to the longs, I added it to a solid car to keep it that way. IF I was to add your rollbar kit, would the car be stiff enough that I could remove the box sections that run between the center tunnel and the outer sill that the seats mount to? I've been thinking I'd like to put some after market seats in, and retain the seat slider/tilt system that is in the car now, but would need to mount it flat to the floor to fit a non-914 seat. In my car pics you can see the OMP seat I have in the car on the driver side. I made some flat adapters to fit the seat to the oem sliders, and when I'm in the car with my helmet on, I am above the windshield with the top of the helmet. I'd like to put in 2 matching seats, and mount them lower. I was thinking of a full autopower style cage, but had concerns on the street. Your cage could be one solution to consider.

What does anyone think? With Brads outer kit already installed, and if I were to add McMarks rollbar, would adding the engman kit add much more strength? I could easily have a weld-a-thon one weekend and do the engman and the roll bar...

...and, what would you need to do for a replacement back pad- go over the metal firewall directly, or leave the insulation panel glued on and go over that?


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Posted by: zx-niner Nov 28 2010, 10:33 PM

Does it require use of a racing harness in place of stock seat belts?

Posted by: McMark Nov 28 2010, 11:32 PM

No, you can use any belts you wish.

Posted by: McMark Nov 28 2010, 11:44 PM

Dave,

I think the cross-bar under the seats is of little structural value. I think it's partly to provide a support for the seats, and partly to brace the floor pan. Check out http://www.914world.com/bbs2/index.php?s=&showtopic=80724&view=findpost&p=1005335 where horizontally-opposed modified the beam for the same purpose as you. If I were doing the modification, I would go this route. That way the floor pan retains some support. Moving the beam forward would also accomplish the same.

You cannot lower the seat and keep the tilt feature. The 'teeth' that lock the height adjustment are part of what makes the cross-beam so tall. To get height adjustment you would need to fabricate something custom. I would also think that you'll get the best results by getting rid of the seat hinges.

I think this GT half-cage would marginalize the Engman kit. If you're looking for every last scrap of stiffening, then you could do both.

Because you can't use the stock backpad, a bare firewall or a carpeted firewall would be the only solution.

Posted by: Elliot Cannon Nov 29 2010, 12:54 AM

I have no idea where the hardware for this came from but it works pretty good. I'll sell anyone the side bars for $20,000. What the hell, I'll even throw in the car. av-943.gif


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Posted by: Zimms Nov 29 2010, 05:33 AM

QUOTE(SirAndy @ Nov 28 2010, 09:22 PM) *

QUOTE(Zimms @ Nov 28 2010, 06:13 PM) *
How much of a pain in the ass is it to get in and out with the side bar of the cage? I am 6ft, 220#.

It's actually EASIER than without. You can use the sidebar to push yourself up when getting out of the car ...

shades.gif Andy


Thanks!

Posted by: race914 Nov 29 2010, 09:48 AM

Hi McMark,

Thanks so much for reproducing these. I'm on a never-ending quest to make our (the 914-6 is Tricia's) GT clone a really accurate clone!

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I'm investigating my 'secret' 914 funds now to see if I can order one without being kicked out of the house... (I've already ordered the GT headlight kit.. shhhhhhh : )

Just a quick question, which is somewhat OT from the originality. Didn't brant have a post about the safety factor of a side to side bar behind the seats? I thought he promoted the safety of a side to side bar with a T-Bone in the drivers door?

I'm not proposing you add these, but just want to respond to the previous posts and offer the thought that they are functional and do add some safety.

Thanks again for offering this exciting GT product! I'll be in touch

Greg


Posted by: McMark Nov 29 2010, 12:31 PM

I think in this case, if all-inclusive safety is your #1 goal, this may not be the product for you. I'm making this available as a replica GT part for 'originality' purposes, as well as a stiffening benefit. There is obviously a safety benefit to any roll bar/cage, but this setup is less about safety than some of the others.

That being said, I would love to see a link to the post you're thinking of. I'm always eager to learn, and other bolt in/weld in cages may be in my future. wink.gif

Posted by: jt914-6 Nov 29 2010, 12:50 PM

That looks a whole lot like a Safety Devices bolt in roll cage for a 914. I bought one years ago with the idea of having it welded in. Instead I used it for a pattern and made my own full cage from the pattern and sold the bolt in cage....I did not use the plate on the firewall...did something better..... biggrin.gif

Posted by: McMark Nov 29 2010, 12:53 PM

blink.gif Looks pretty different to me...

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Posted by: jt914-6 Nov 29 2010, 01:04 PM

The one I had was from the mid 90's. They may have changed the design since.... dry.gif

Posted by: McMark Nov 29 2010, 01:05 PM

beerchug.gif

Posted by: Brett W Nov 29 2010, 01:08 PM

SCCA requires a full diagonal to run from the top corner to a bottom corner in order to be legal for Time Trial, you might see if you can convince them that these are just as strong and get them allowed. Otherwise they aren't SCCA legal unless you do a diagonal on the rearward down bars, which will totally ruin your goal of having a replica bar.

Posted by: Eric_Shea Nov 29 2010, 02:41 PM

I don't recommend any further stiffening kits with these. Added weight that won't be necessary.

Posted by: jt914-6 Nov 29 2010, 02:48 PM

Here's the way mine was done. Instead of the flat piece that goes on the firewall we put in a piece through the firewall connecting all four of the rear brace bars. I would think that would pass for a top to bottom corner bar??? idea.gif

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Posted by: brant Nov 29 2010, 04:30 PM

The safety devices company have a couple of different styles.
and their Euro sold version of a bolt in kit, did have the fire-wall V style of mount similar to the Mark's design.
I used to have one too.


I think its VERY nice looking

this is taking the thread off topic, but I personally feel the seat mount bar does provide structural rigidity and structural boxing to the chassis.
I cut mine out once on my black car, but within months added it back.
I think there is some structural purpose and more importantly I think it is a big safety factor for side impact.

I also modified my safety devices bar to add a cross brace down low behind the seats from side to side.

I have seen a 914 hit in a T bone accident on the race track
the car was hit at the driver side seat area and moved inward about 12 inches. This is scary, because your shoulder is only about 6 inches from the outside shell of the door.

imagine taking a direct metal impact into your shoulder from a 3000lb moving car?

so I think the rear side to side bar is important for safety or racing, and the seat mount cross brace is a small nod towards side impact safety from the factory.

The factory long moves inward very easily in a metal to metal contact.

buy a different seat if you need head room
the ultra shield seat will mount nicely on the floor behind the stock cross brace.... my old scheel seats mounted on the stock sliders/stock cross brace and were low also.

2cents
nice roll bar Mark!
brant

Posted by: carr914 Nov 29 2010, 06:10 PM

I don't believe that Safety Devices is still making their Bar with the V-Brace

Mark, if I already didn't have one to put in my GT, I would buy one of yours.

Posted by: Van914 Nov 30 2010, 09:54 AM

I have the Safety Devices Cage in mine. It has the firewall mount. I think they will reproduce on special order.
van914

Posted by: Madswede Nov 30 2010, 02:25 PM

QUOTE(brant @ Nov 29 2010, 03:30 PM) *

buy a different seat if you need head room
the ultra shield seat will mount nicely on the floor behind the stock cross brace.... my old scheel seats mounted on the stock sliders/stock cross brace and were low also.

2cents
nice roll bar Mark!
brant


Thanks for your $0.02 Brant. I was considering this but I'm afraid it will make the car too uncomfortable for longer drives and I'm worried about leg room as well as head room - I guess I could always use cardboard seats. laugh.gif

- Nelson (a shade under 6'3" and 240# for those that don't know me)

Posted by: 914 shifter Nov 30 2010, 04:59 PM

QUOTE(Elliot Cannon @ Nov 28 2010, 10:54 PM) *

I have no idea where the hardware for this came from but it works pretty good. I'll sell anyone the side bars for $20,000. What the hell, I'll even throw in the car. av-943.gif

structural integrity anyone.

Posted by: carr914 Nov 30 2010, 06:44 PM

QUOTE(Van914 @ Nov 30 2010, 10:54 AM) *

I have the Safety Devices Cage in mine. It has the firewall mount. I think they will reproduce on special order.
van914


I talked to Bob @ Stable Energies today to buy some parts for a customer today and Safety Devices still makes the V-Brace for them, even though it is not on the Safety Devices WebSite

Quite a bit more than McMarks

T.C.

Posted by: Porcharu Nov 30 2010, 07:15 PM

I want one and I can pick it up the next time up in Napa.

Posted by: ottox914 Nov 30 2010, 08:22 PM

Highly interested, I'll be giving you a call to discuss soon.

I've also got a package to send to you...

Posted by: Lou W Dec 1 2010, 10:37 PM

Mark, your idea for the roll cage looks awesome. My question to you, for us older guys who have a little tougher time getting in and out of these cars, could this side bar be an option? what are your thoughts and concerns?

Thank you smile.gif


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Posted by: McMark Dec 1 2010, 10:47 PM

A bar like that would be do-able. It'll lose some rigity, but I can't say how much. May not be noticeable at all.

Posted by: Rand Dec 1 2010, 11:20 PM

Seems like adding a short tube, elbow to crotch, would make a big difference in that example. The bend with no support is sketchy. Wait, the more I look at that, the more it bugs me. The bend is bad. It would be better to make the side tube straight and connect it lower to the rollbar than bend it like that. Ugh, we are venturing outside best design standards. Bends are for hoops. Tubes between pillars should be straight and triangulate. Hey I'm a poet and don't know it.

Posted by: SirAndy Dec 2 2010, 12:03 PM

QUOTE(Rand @ Dec 1 2010, 09:20 PM) *

Seems like adding a short tube, elbow to crotch, would make a big difference in that example. The bend with no support is sketchy. Wait, the more I look at that, the more it bugs me. The bend is bad. It would be better to make the side tube straight and connect it lower to the rollbar than bend it like that. Ugh, we are venturing outside best design standards. Bends are for hoops. Tubes between pillars should be straight and triangulate. Hey I'm a poet and don't know it.

Here's what Tony did on my cage. Ignore the temp bracing ...

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Posted by: Lou W Dec 2 2010, 12:12 PM

QUOTE(Rand @ Dec 1 2010, 11:20 PM) *

Seems like adding a short tube, elbow to crotch, would make a big difference in that example. The bend with no support is sketchy. Wait, the more I look at that, the more it bugs me. The bend is bad. It would be better to make the side tube straight and connect it lower to the rollbar than bend it like that. Ugh, we are venturing outside best design standards. Bends are for hoops. Tubes between pillars should be straight and triangulate. Hey I'm a poet and don't know it.



How about this brace?


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Posted by: Rand Dec 2 2010, 12:46 PM

Bingo.

Posted by: jgara962 Dec 2 2010, 01:25 PM

drooley.gif if I wasn't in massive debt from the new house...
That is a great looking piece Mark.

Posted by: McMark Dec 2 2010, 01:45 PM

Can't you add a new cage to your home loan? av-943.gif

Posted by: McMark Dec 3 2010, 05:58 PM

Material for three cages ordered today for delivery next week! welder.gif

Posted by: J P Stein Dec 5 2010, 12:13 PM

Note the back-up for the door bars. I see some with (Andy's, for instance) & some without.


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Posted by: TROJANMAN Dec 6 2010, 05:07 PM

I'd order one, but I think I am going to wait for AA to offer it for $5 cheaper in a "What's New" thread

Should expect to see one real soon...........

av-943.gif

Posted by: bcaschera Dec 11 2010, 01:35 AM

Could this work to replace my "missing" targa bar idea.gif ?
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Posted by: McMark Dec 11 2010, 05:09 PM

It would be better than nothing. sunglasses.gif

Posted by: turboman808 Dec 17 2010, 02:12 PM

Wow that looks fantastic. I have been putting off doing any work on my car but this with some interior upgrades would look so sweet.

Posted by: racerbvd Jun 26 2011, 10:16 AM

How is this project progressing???

Posted by: 396 Jun 26 2011, 11:15 AM

QUOTE(Rand @ Dec 1 2010, 10:20 PM) *

Seems like adding a short tube, elbow to crotch, would make a big difference in that example. The bend with no support is sketchy. Wait, the more I look at that, the more it bugs me. The bend is bad. It would be better to make the side tube straight and connect it lower to the rollbar than bend it like that. Ugh, we are venturing outside best design standards. Bends are for hoops. Tubes between pillars should be straight and triangulate. Hey I'm a poet and don't know it.



I asked Dennis at Assco Racing about the same thing years ago and he mention the same thing- "side tube straight and connect it lower to the rollbar than bend it"


Also when I mentioned OK..But can you build me one anyway? His response was NO – it’s too much liability… in a racing environment

For the street- a great looking product- good luck with your project!

Posted by: 9146BRUCE Aug 16 2011, 03:06 PM

Hi Mark
How is the half cage going.

Bruce

Posted by: carr914 Aug 16 2011, 04:17 PM

Certainly not a Hijack, but if someone buys a McMark Bar and wants the forward pieces, I have them from a Safety Devices Cage that I just used the rear bar

Posted by: malaga_red75 Aug 16 2011, 06:25 PM

QUOTE(9146BRUCE @ Aug 16 2011, 02:06 PM) *

Hi Mark
How is the half cage going.

Bruce


I'd like to know too. I talked to Mark a few weeks ago about one but nothing came of it.

I'm still interested!

Thanks,

Peter

Posted by: 9146BRUCE Aug 17 2011, 11:33 AM

Well I gave mark the money in November for one, I have PM him twice and not heard back.

Bruce

Posted by: treborzerimar Aug 21 2011, 10:46 AM

emailed Mark asking if I could stop in to introduce myself (I am local).... he responded quickly.

He's around.... busy, I'm sure.

Cheers!

Posted by: 9146BRUCE Oct 4 2011, 01:58 PM

Hi Mark whats the story on the half cage.
Bruce

Posted by: McMark Oct 4 2011, 02:10 PM

Sent a PM. Not sure what happened to the other PMs I sent... confused24.gif Certainly not hiding from ya!

Posted by: racerbvd Oct 4 2011, 02:28 PM

I would still love to trade for one beer.gif

Posted by: wndsrfr Dec 2 2011, 09:16 AM

Mark.....any update on the GT half cage? I'm looking to install something this winter...

Posted by: 9146BRUCE Dec 3 2011, 10:57 PM

Hi Mark I have 2 weeks off a xmas I was wondering if I could come up and pick up the half cage then. Please let me know

Bruce

Posted by: McMark Dec 3 2011, 11:16 PM

Yup, getting them all built this month now that I'm finally getting caught up on all the cars.

Posted by: Vysoc Dec 4 2011, 06:39 AM

Mark,


When you get them going, I am very interested in one.

Thanks,
Vysoc flag.gif

Posted by: 9146BRUCE Dec 14 2011, 06:45 PM

Hi Mark I was wondering if I can come up and pick up my Half Cage on December 28 or the 29 please let me know.
Thanks Bruce

Posted by: Zimms Jan 18 2012, 09:23 AM

icon_bump.gif

Any updates?

Posted by: ConeDodger Jan 18 2012, 09:04 PM

QUOTE(Zimms @ Jan 18 2012, 07:23 AM) *

icon_bump.gif

Any updates?


Actually, Mark was building half-cages today... biggrin.gif

Posted by: SirAndy Jan 18 2012, 09:16 PM

QUOTE(ConeDodger @ Jan 18 2012, 07:04 PM) *
QUOTE(Zimms @ Jan 18 2012, 07:23 AM) *
icon_bump.gif

Any updates?


Actually, Mark was building half-cages today... biggrin.gif

agree.gif

I saw pitchers ... beer3.gif

Posted by: ConeDodger Jan 18 2012, 09:21 PM

Did it look like this?


(stolen from the Original Customs Facebook page)


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Posted by: SirAndy Jan 18 2012, 09:41 PM

QUOTE(ConeDodger @ Jan 18 2012, 07:21 PM) *
Did it look like this?

Maybe ... happy11.gif

Posted by: Zimms Jan 19 2012, 05:29 AM

Cool! Thanks for posting pix!

Posted by: ConeDodger Jan 19 2012, 08:17 AM

QUOTE(Zimms @ Jan 19 2012, 03:29 AM) *

Cool! Thanks for posting pix!


Hold on now! I'm not sayin' that's Mark, or that that is a GT half-cage being made. I'm just sayin' it looks like Mark and it looks like a GT half-cage. Ya'll draw your own conclusions evilgrin.gif

Mark's a little busy trying to have a life outside of Original Customs and 914World right now... He might have more time if my 240Z would sit, lay down, and roll over when he commanded it... blink.gif

Posted by: Elliot Cannon Jan 19 2012, 12:01 PM

I think that damn Japanese car has contaminated his shop. happy11.gif

Posted by: ConeDodger Jan 19 2012, 02:54 PM

QUOTE(Elliot Cannon @ Jan 19 2012, 10:01 AM) *

I think that damn Japanese car has contaminated his shop. happy11.gif

He thinks it's a curse... He has two in the shop and neither will run right!

Posted by: shuie Feb 11 2012, 06:18 PM

Damn, I wish I had seen this thread when the pre-orders were being taken. I really, really, want one of these.

Posted by: ConeDodger Feb 11 2012, 11:20 PM

QUOTE(shuie @ Feb 11 2012, 04:18 PM) *

Damn, I wish I had seen this thread when the pre-orders were being taken. I really, really, want one of these.


Contact Mark... Very reasonable guy. He will probably hook you up. Just tell him I said building you a half-cage would probably be easier than tuning my 240Z! lol-2.gif

Posted by: Zimms Mar 8 2012, 02:21 PM

UPS stopped by!

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Posted by: racerbvd Mar 8 2012, 06:39 PM

QUOTE(Zimms @ Mar 8 2012, 01:21 PM) *

UPS stopped by!

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SWEET!!!!

Posted by: McMark Mar 9 2012, 12:06 AM

Looks like they tried to lose one of the down-bars. Glad it stayed with the rest. Guess I'll have to do a better job on packaging.

Posted by: Zimms Mar 9 2012, 08:01 AM

Between the plastic wrap and the ties, it stayed, but it came out pretty easy when I broke the tie wrap and wiggled the piece a little.

It looks great!

Posted by: Aaron Cox Mar 9 2012, 09:25 AM

These look fantastic mark!

Posted by: Garold Shaffer Mar 9 2012, 09:57 AM

QUOTE(Zimms @ Mar 8 2012, 12:21 PM) *

UPS stopped by!


piratenanner.gif piratenanner.gif piratenanner.gif


aktion035.gif

Posted by: Aaron Cox Mar 23 2012, 02:04 PM

Mark,

Do you have any pics of your hoop installed in customers cars yet?

Looks rad.

Posted by: jhadler Mar 23 2012, 02:50 PM

Looks really great! Has anyone confirmed if this design would meet SCCA or NASA roll bar requirements for Time Trials or Hillclimbs?

Another thought on improving rigidity, is to add another forward bar that runs along the longitudinal. The trick, I've been told is, tightly clamp the bar to the long, then weld it into place along with the cage.

Don't know if it'd make a difference or not, but thought I'd mention it.

-Josh2

Posted by: ChrisNPDrider Mar 23 2012, 03:16 PM

beerchug.gif
can't wait to see instal pics
beerchug.gif

Posted by: Racer Chris Mar 23 2012, 05:49 PM

QUOTE(jhadler @ Mar 23 2012, 03:50 PM) *

...Has anyone confirmed if this design would meet SCCA or NASA roll bar requirements for Time Trials or Hillclimbs?
...

doesn't look like it meets any current SCCA regs.

Posted by: Randal Apr 10 2012, 09:52 AM

QUOTE(SirAndy @ Dec 2 2010, 11:03 AM) *

QUOTE(Rand @ Dec 1 2010, 09:20 PM) *

Seems like adding a short tube, elbow to crotch, would make a big difference in that example. The bend with no support is sketchy. Wait, the more I look at that, the more it bugs me. The bend is bad. It would be better to make the side tube straight and connect it lower to the rollbar than bend it like that. Ugh, we are venturing outside best design standards. Bends are for hoops. Tubes between pillars should be straight and triangulate. Hey I'm a poet and don't know it.

Here's what Tony did on my cage. Ignore the temp bracing ...

IPB Image



Tony does great work.

If you're street driving you're more likely to get bonked on the top bar (back hoop to front hoop) than the front.

My original cage was like yours and there was nothing, in the form of restraints, to keep my head from hitting that back to front top bar. The big racing belts I use would keep your head from going forward and hitting the front hoop, but guessing most don't use the shoulder harnesses on the street as they aren't very comfortable if cinched tight. Most just use the lap belts.

I like the cage I have now in that there is nothing high in the front (you can see) and the side bar is pretty hard to hit even if you try. Of course you might not want to cut your windshield off. smile.gif

Posted by: JamesM Apr 18 2013, 04:24 PM

Are you still making these? After taking another look at Erics car I am considering pulling my 3 point bar and going with something like this instead.


Posted by: McMark May 20 2013, 09:57 PM

Yes I am. Sorry for the late reply. I need to re-subscribe to my threads.

Posted by: McMark May 20 2013, 09:59 PM

QUOTE(Racer Chris @ Mar 23 2012, 04:49 PM) *

QUOTE(jhadler @ Mar 23 2012, 03:50 PM) *

...Has anyone confirmed if this design would meet SCCA or NASA roll bar requirements for Time Trials or Hillclimbs?
...

doesn't look like it meets any current SCCA regs.

I never intended it to. It's a GT replica product. Not a race-legal or life-saving device.

Posted by: porbmw May 22 2013, 09:16 PM

Hey Mark

When you have a moment, could you contact me re making up one of these half cages....Do have a couple of questions, etc....no rush....

Thanks

Paul

Posted by: Franky_Four_Fingers May 5 2018, 12:55 PM

Not sure if these are still in production, but I am interested in one.

Posted by: porbmw Jun 27 2018, 10:06 AM

Don't know
Received one some time ago.
Nice!
Thanks, Mark beerchug.gif

Posted by: McMark Jun 27 2018, 12:12 PM

Got Franky_Four_Fingers set up a couple weeks ago. thumb3d.gif

Posted by: HalfMoon Aug 27 2018, 02:56 PM

Are you still making these and if so, can you ship flat box (some assembly required-lol)?
Shipping to 25442
David

Posted by: Luke M Apr 9 2021, 07:37 AM

icon_bump.gif Pm sent..

Posted by: TRE Cup Jan 27 2022, 07:16 PM

Hi Mark
here we are in 2022. Please let me know if you can still make the GT bar. We have one client for the simple hoop with the center V tubes / plate . And another for the Hoop, V tubes/ plate and side bars that we intend on welding to the main hoop and forward location
Please e mail us at tremotorsports@gmail.com to discuss
Thanks
Dave

Posted by: DaveB Mar 12 2022, 12:20 AM

@http://www.914world.com/bbs2/index.php?showuser=419 -

I know this is the thread that will not die, but...

If you're able to build one for the other Dave, could you bend some more tubing for one more half cage? I'd seriously like to get one for my build. I'll PM you.

DaveB

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