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marshall_mosty
11-09-2009, 12:03 PM
I'm going to pickup some roll-cage tubing from Jorgensen's in Dallas this week, but don't know what to ask for alloy-wise.

I know that I'm going to get 1 3/4, .120 wall, but I don't know what alloy. What did everyone else ask for when buying sticks of tubing?

AI#97
11-09-2009, 12:27 PM
I'm going to pickup some roll-cage tubing from Jorgensen's in Dallas this week, but don't know what to ask for alloy-wise.

I know that I'm going to get 1 3/4, .120 wall, but I don't know what alloy. What did everyone else ask for when buying sticks of tubing?

It's just STD DOM. consider .095....most of the welders I think you have access to are going to struggle with .120 wall. Mine was border line on Jeremy's tubing and required a steady hand to keep heat in the parts. It's also easier to bend and meets the rules requirements.

TJ Bain
11-09-2009, 12:55 PM
What we use for roll cage tubing is commonly called 1020 DOM by the steel houses.

Matt is correct about the wall thickness. I'm not sure what you're building, but you can use .095 for the entire cage, but most use .120 on critical items and .095 for other required bars, then .063 for non-required brace tubes.

On non-required bars (non-safety bracing, bumpers, etc), I use seamed tubing because it's cheaper.

mitchntx
11-09-2009, 01:23 PM
If your car is under #3000 dry and has the minimum safety gear, then .095 is allowed.

The older Mustangs and 3rd gen F-Cars can get there pretty easy, it seems. The 4th gen cars can, depending upon the level of prep. I don't know about the later model Mustangs. They very well could have similar issues to the 4th gen F-car.

It would suck to have to drain fluids and remove "extras" if you had to prove weight at Annual Tech or Nationals Tech if you were close to that max weight.

marshall_mosty
11-09-2009, 02:08 PM
This is for my AI car, so weight is not a problem, as it will be 2750 dry this year without any fluids.

I'll grab the .095 since I'm just beefing up the current .120 wall cage. Should be cheaper to boot.

marshall_mosty
11-09-2009, 02:09 PM
What we use for roll cage tubing is commonly called 1020 DOM by the steel houses.

Matt is correct about the wall thickness. I'm not sure what you're building, but you can use .095 for the entire cage, but most use .120 on critical items and .095 for other required bars, then .063 for non-required brace tubes.

On non-required bars (non-safety bracing, bumpers, etc), I use seamed tubing because it's cheaper.

TJ, thank you very much for your info.

AI#97
11-09-2009, 02:39 PM
This is for my AI car, so weight is not a problem, as it will be 2750 dry this year without any fluids.

I'll grab the .095 since I'm just beefing up the current .120 wall cage. Should be cheaper to boot.

You are shooting to be heavier than me?!

The POWER corrupts! ;)

mitchntx
11-09-2009, 02:44 PM
This is for my AI car, so weight is not a problem, as it will be 2750 dry this year without any fluids.

I'll grab the .095 since I'm just beefing up the current .120 wall cage. Should be cheaper to boot.

Yeah, I knew that. But it wasn't 100% clear for someone new and did a search.

What would REALLY suck is if with a basic 6 point, CMC/AI legal cage, dry you came in under #3000.

But once you add bracing, passenger side door bars, gussetts, etc., you went over #3000. Those are items you can't easily remove, nor want to in order to be checked.

Also consider 1.75" DOM tubing is a tick over #2.1/ft of .120 wall and ~#1.6/ft of .095. So if you use 50' of tubing, that's a difference of ~#20 of steel.

TJ Bain
11-09-2009, 03:17 PM
TJ, thank you very much for your info.

No problem. Gotta help out the other lightweights in AI vs. the 3400lb rocket ships. :lol:

-TJ
3rd gen Firebird, 2925lbs without ballast :wink:

AI#97
11-09-2009, 03:25 PM
TJ, thank you very much for your info.

No problem. Gotta help out the other lightweights in AI vs. the 3400lb rocket ships. :lol:

-TJ
3rd gen Firebird, 2925lbs without ballast :wink:

2620 Dry and no ballast! Pretty damn light SN99!!! Damn Driver weighs half what the engine does! :lol: ;)

marshall_mosty
11-09-2009, 04:03 PM
Also consider 1.75" DOM tubing is a tick over #2.1/ft of .120 wall and ~#1.6/ft of .095. So if you use 50' of tubing, that's a difference of ~#20 of steel.
Mitch,
I'm planning on using approx 20' of .095 for this project, so I'm looking at 35lbs that I won't have to ballast. Since I was already on the line of not being able to add any ballast, that will be good insurance just incase the motor loosens up some more.

David Love AI27
11-09-2009, 06:46 PM
TJ, thank you very much for your info.

No problem. Gotta help out the other lightweights in AI vs. the 3400lb rocket ships. :lol:

-TJ
3rd gen Firebird, 2925lbs without ballast :wink:

We really need to talk!! My 3rd gen AI car is 3,190 dry....

TJ Bain
11-09-2009, 06:54 PM
We really need to talk!! My 3rd gen AI car is 3,190 dry....

Yikes! :shock:

2980 is my post-race weight with 225lb driver, 7-8 gals of fuel, and 55lbs of lead. Should be about 2650 dry on fuel. Only composite is the fiberglass hood. PM me if you need info and we'll talk. ;)

David Love AI27
11-09-2009, 07:24 PM
We really need to talk!! My 3rd gen AI car is 3,190 dry....

Yikes! :shock:

2980 is my post-race weight with 225lb driver, 7-8 gals of fuel, and 55lbs of lead. Should be about 2650 dry on fuel. Only composite is the fiberglass hood. PM me if you need info and we'll talk. ;)


ROFLMAO!!!! last time I rolled off post race I was 3380, 175lb driver, 4 gal of fuel left and, of course, no balast, no cool suit... no big deal, tho... I've decided to go the other direction and run 380hp to the rw and upgrade the brakes... I'm just lazy...

ShadowBolt
11-09-2009, 08:05 PM
I'm going to pickup some roll-cage tubing from Jorgensen's in Dallas this week, but don't know what to ask for alloy-wise.

I know that I'm going to get 1 3/4, .120 wall, but I don't know what alloy. What did everyone else ask for when buying sticks of tubing?


Marshall,

You may want to try Samuel and Reliance against Jorgensen's prices. I sent Michael and MFW to one of those for the Lemons car and they got a great deal. Call me if you need contact info.

JJ

BlueFirePony
11-09-2009, 10:59 PM
We really need to talk!! My 3rd gen AI car is 3,190 dry....

Yikes! :shock:

2980 is my post-race weight with 225lb driver, 7-8 gals of fuel, and 55lbs of lead. Should be about 2650 dry on fuel. Only composite is the fiberglass hood. PM me if you need info and we'll talk. ;)


ROFLMAO!!!! last time I rolled off post race I was 3380, 175lb driver, 4 gal of fuel left and, of course, no balast, no cool suit... no big deal, tho... I've decided to go the other direction and run 380hp to the rw and upgrade the brakes... I'm just lazy...
phhhfffttt...i was 3500# post race with almost no fuel and a fat-ass driver (oh ...that last part was not flattering was it ??)
If I visit MFW's House of Weight Loss I can drop #200 from the car at least ;)

I'm lazy too...gonna visit MFW's House of Weight loss before too long...can you imagine how well my car will perform 200# lighter ?

AI#97
11-09-2009, 11:11 PM
phhhfffttt...i was 3500# post race with almost no fuel and a fat-ass driver (oh ...that last part was not flattering was it ??)
If I visit MFW's House of Weight Loss I can drop #200 from the car at least ;)

I'm lazy too...gonna visit MFW's House of Weight loss before too long...can you imagine how well my car will perform 200# lighter ?

Actually, after watching Marshall yesterday might make HIM the new "grinder king".

marshall_mosty
11-10-2009, 12:13 AM
Nothing like taking a car that is already too light and pulling more metal from the inside. Hey, that OEM horn bracket that isn't used weighs something, right??

MikeP99Z
11-10-2009, 12:18 AM
Maybe I should lighten my car and drop my hp. 8)

TJ Bain
11-10-2009, 12:19 AM
16 ounces in a pound.

Gas door assembly = 3 lbs
Gas door with 2 small AL brackets = <1lb

"But that's rear weight..."
-Yeah, I'm moving it from the left to right side though...

It's a sickness. :lol:

BlueFirePony
11-10-2009, 12:51 AM
All y'all can laugh, but #200 is worth mucho horsepower (well OK, not real HP, but REAL performance) to my pony.

Now I'll be able to race everyone in AND out of the turns :twisted:

David Love AI27
11-10-2009, 12:56 AM
wrong thread..

MikeP99Z
11-10-2009, 12:59 AM
?

wtf