I would like to have a 3"x4" 1/8 thick steel frame for my 86 fox. I was thinking round tube for the rear. Anybody else have pics or advice for this kind of project? Im not sure if Im going to buy a Hobart mig welder and have my friend weld it up and try building it in his garage. I might have a shop build it but that's as a last resort. My father designs steel structures and is a NY certified welding inspector but I'm not trying to bug him too much for help. The car has the engine bay gutted and so is the interior. It has a 4.6 cobra k-member, control arms, struts, springs and steering rack in it right now and a rebuilt 8.8 rear with all 4 rear tubular control arms and poly bushings.
Full Length Tube Frame
- Thread starter 86Teksid
- Start date
-
Sponsors (?)
I gotta tell ya, that has got to be one of the weirdest ambitions I've seen so far yet to date.
3" Dom? What ever for?
There are complete prebent round tube kits available already for that car. Typically would be something like 1-5/8" - 1-3/4" diameter/.134 wall thickness,...... nowhere near what you are thinking.
Front frame rail rot, added to suspect door hinge bulkheads, coupled to cancerous floor boards equals a trip to the scrap yard for most cars, with one exception,........ Are you building the car into a drag car?
If so, not only are there round tube real frame rail packages out there but also the more common 2x3" rectangular pieces.
3" Dom? What ever for?
There are complete prebent round tube kits available already for that car. Typically would be something like 1-5/8" - 1-3/4" diameter/.134 wall thickness,...... nowhere near what you are thinking.
Front frame rail rot, added to suspect door hinge bulkheads, coupled to cancerous floor boards equals a trip to the scrap yard for most cars, with one exception,........ Are you building the car into a drag car?
If so, not only are there round tube real frame rail packages out there but also the more common 2x3" rectangular pieces.
Yeah. 3" dom is definitely too much for this place. Maybe try the tractor pulling forum across the hall.
Wow, first you insult "this place", then talk chit on one the best fabricators here, waiting for the usual @madmike1157 reply that anyone reading this thread knows is coming
Nobody.
Let me say that again so it'll soak in.
NOBODY has ever built a drag car using 3" round tubing on any part of the car, except exhaust tubing, and that is what that tubing is intended for.
Unless you are building a Monster Truck.
But then you aren't building a Monster truck now are you?
Dude, do yourself a favor, and get a chassis manual.
You'll see that every drag car ON EARTH is built using a combination of either 1-5/8"-1 3/4" .125 .134 wall mild steel for roll bars.
OR
1-5/8" Chromoly where the wall thickness is allowed to drop to about .090.
OR
And 2x3" .125 wall rectangular tubing for frame rails/ SFC's for those.
Here's a little tidbit for you to gnaw on:
The current 25-1/2/3/4/5 cars that have ever been built were built to NHRA mandated rules for safety at speeds exceeding 200 MPH. Those speeds are typically coupled to 1/4 mile ET's that are in the -8 second range. In order to be able to travel at speeds above 200 MPH and do it in less that 8 seconds requires power. Power in the 2000+ HP range is typically what it takes.
And the frames and cages in those cars are all built using 1-5/8 .090 wall chromoly tubing.
Now.
I'll write this real slow so you wont miss anything.
If These guys can make that much power, and go that freakin' fast, and the NHRA only requires a weenie little 1 and 5/8 inch, oh ninety wall tube, to be considered safe............
What the hell do you need a 3" round tube for again?.......... I forgot?
Wow....you're new here and you ask for advice and you flame the people trying to help you? How about you let us know what your HP goals are, what kind of racing your wanting to do and what setup your going to run??
Unfortunately you sound like a wannabe that thinks he's smart but is asking for help on a forum because you lack the know how of designing and building it yourself. To me it seems like you want to build a race car with a truck frame for a roll cage.
Please act accordingly.
If the guys going 8.xx to the 1/4 or 4.xx to the 1/8th here isnt good enough for you, or a guy who knows more about chassis fab then i have forgotten about cars period- hit up Yellowbullet with that question in the trash or be trashed forum. Those boys will help you out 
If the guys going 8.xx to the 1/4 or 4.xx to the 1/8th here isnt good enough for you, or a guy who knows more about chassis fab then i have forgotten about cars period- hit up Yellowbullet with that question in the trash or be trashed forum. Those boys will help you out
haha that will be EPIC!
Similar threads
