"The" 2jz FD rx7 swap build. yay...
Those welds on the subframe to the control arm boxes are clearly "finish welded" if you can even call that welding. It looks like all of the welds were done with a flux-core welder and then spray painted it. He didn't even cope the ends of the longitudinal tubes either...
Joey,
Please look carefully here.
I know you guys aren't engineers.
Lucky for you that I am.
You cannot apply the kinds of dynamic stresses the car will see on a bending moment held together with flux-core welding wire.
You are endangering your life, and everyone else driving around you.
Please look carefully here.
I know you guys aren't engineers.
Lucky for you that I am.
You cannot apply the kinds of dynamic stresses the car will see on a bending moment held together with flux-core welding wire.
You are endangering your life, and everyone else driving around you.
Joey,
Please look carefully here.
I know you guys aren't engineers.
Lucky for you that I am.
You cannot apply the kinds of dynamic stresses the car will see on a bending moment held together with flux-core welding wire.
You are endangering your life, and everyone else driving around you.
Please look carefully here.
I know you guys aren't engineers.
Lucky for you that I am.
You cannot apply the kinds of dynamic stresses the car will see on a bending moment held together with flux-core welding wire.
You are endangering your life, and everyone else driving around you.
Here we will simulate an assembly with an assumed perfect part to part interface.
The simulated load for sake of discussion will be 100 lbs acting in the -Z axis. (Gravity omitted.)
Here is a simulation with AISI 304 steel DOM tube:
Ceteris paribus, we will just look at differences in tube construction to make our point.
From a empirical standpoint, I don't know your material choice or amount of weld penetration.
We will hold all that constant, however we'll change the physical geometry for simulating:
This we'll compare URES instead of yield strength.
Below is a simulation assuming a constant pipe diameter with no imperfections:
And again with a joined pipe like it is in real life:
You're looking at a 41% increase in deformation due to the joint.
And a stress increase from 1.323+e3 to 3.269+e3 von Mises PSI stress distribution.
But you've already done all this I'm sure.
The simulated load for sake of discussion will be 100 lbs acting in the -Z axis. (Gravity omitted.)
Here is a simulation with AISI 304 steel DOM tube:
Ceteris paribus, we will just look at differences in tube construction to make our point.
From a empirical standpoint, I don't know your material choice or amount of weld penetration.
We will hold all that constant, however we'll change the physical geometry for simulating:
This we'll compare URES instead of yield strength.
Below is a simulation assuming a constant pipe diameter with no imperfections:
And again with a joined pipe like it is in real life:
You're looking at a 41% increase in deformation due to the joint.
And a stress increase from 1.323+e3 to 3.269+e3 von Mises PSI stress distribution.
But you've already done all this I'm sure.
Joined: May 2005
Posts: 3,243
Likes: 42
From: Kennewick, Washington
A couple things to point out. You didn't bevel the welded joint to weld it from the inside out, not to mention what WAS welded is poorly done at best. Secondly, there didn't even NEED to be a welded joint there. Poor material planning is at work here.
what tony forgot to mention was where that "cut" in the center on the front side of the sub-frame there is a 1" nearly 1/4" thick chromoly steel tube. the weld there connects all 3 pieces of pipe. the pipe inside is 10"..5" on either side of the weld. its NOT a Small piece cut to fit in between a gap.
the tacks were done with a non gas mig (possibly giving it that flux core look) . but fully welded with a 75/25 argon c02 mix. heat at C and wire speed at 4...
look i know tony doesn't have a ton of experience. but he has fusion between joints, the machine is set right too. i know this since i asked my dad who has been a professional welder for 32 years. he said those welds should have a sheared strength to 70,000psi. again im not a welder, this is coming from my dad who does government military contracts at his shop.
but honestly the real test is going to be on the street/track. yes, im going to have my dad look everything over. but tony has been so good to me guys, i honestly couldn't have asked for a better person. it bothers me to see so much negative things going towards him. i know you guys mostly only know what you see here but i know him personally, and consider him a very very good friend. we help each other out, outside of just him working on my car. i can't count how many times he has gone out of his way to do stuff for me without me even asking. hell he went to pick up parts for me one time at 1am on a weekday!
i guess its just going to be a wait and see. i appreciate all of you guys trying to look out for me and care for other guys in the community, but i am willing to 100% give tony a chance with my car, and personally i wouldn't trust anyone else. lets see the outcome and see the stone cold hard fact.
PS: i do attend drift events frequently, i plan to push this car to its breaking point
^^^( please no smart *** comments with that stated phrase..)^^^
the tacks were done with a non gas mig (possibly giving it that flux core look) . but fully welded with a 75/25 argon c02 mix. heat at C and wire speed at 4...
look i know tony doesn't have a ton of experience. but he has fusion between joints, the machine is set right too. i know this since i asked my dad who has been a professional welder for 32 years. he said those welds should have a sheared strength to 70,000psi. again im not a welder, this is coming from my dad who does government military contracts at his shop.
but honestly the real test is going to be on the street/track. yes, im going to have my dad look everything over. but tony has been so good to me guys, i honestly couldn't have asked for a better person. it bothers me to see so much negative things going towards him. i know you guys mostly only know what you see here but i know him personally, and consider him a very very good friend. we help each other out, outside of just him working on my car. i can't count how many times he has gone out of his way to do stuff for me without me even asking. hell he went to pick up parts for me one time at 1am on a weekday!
i guess its just going to be a wait and see. i appreciate all of you guys trying to look out for me and care for other guys in the community, but i am willing to 100% give tony a chance with my car, and personally i wouldn't trust anyone else. lets see the outcome and see the stone cold hard fact.
PS: i do attend drift events frequently, i plan to push this car to its breaking point
^^^( please no smart *** comments with that stated phrase..)^^^
im not going into a back in fourth battle here.. and again IM not a welder at all. but if you google chromoly steel..EVERY site says, tensile of 80-97k strength and yield at 52k-62. depending normalized or annealed. i would think my dad knows something after 30 years.
not saying whos right...and im deff not picking sides lol... just stating what i see and hear. thats all we can all do.
like i said.. we'll see. the truth will come sooner or later.
You're not analyzing the material.
You're analyzing the interface of materials.
If I had tool steel 4140 and held it together with bubble gum, I wouldn't care what the yield strength of the steel was.
Last edited by MK3Brent; Mar 27, 2011 at 01:11 AM.
what tony forgot to mention was where that "cut" in the center on the front side of the sub-frame there is a 1" nearly 1/4" thick chromoly steel tube. the weld there connects all 3 pieces of pipe. the pipe inside is 10"..5" on either side of the weld. its NOT a Small piece cut to fit in between a gap.
the tacks were done with a non gas mig (possibly giving it that flux core look) . but fully welded with a 75/25 argon c02 mix. heat at C and wire speed at 4...
look i know tony doesn't have a ton of experience. but he has fusion between joints, the machine is set right too. i know this since i asked my dad who has been a professional welder for 32 years. he said those welds should have a sheared strength to 70,000psi. again im not a welder, this is coming from my dad who does government military contracts at his shop.
but honestly the real test is going to be on the street/track. yes, im going to have my dad look everything over. but tony has been so good to me guys, i honestly couldn't have asked for a better person. it bothers me to see so much negative things going towards him. i know you guys mostly only know what you see here but i know him personally, and consider him a very very good friend. we help each other out, outside of just him working on my car. i can't count how many times he has gone out of his way to do stuff for me without me even asking. hell he went to pick up parts for me one time at 1am on a weekday!
i guess its just going to be a wait and see. i appreciate all of you guys trying to look out for me and care for other guys in the community, but i am willing to 100% give tony a chance with my car, and personally i wouldn't trust anyone else. lets see the outcome and see the stone cold hard fact.
PS: i do attend drift events frequently, i plan to push this car to its breaking point
^^^( please no smart *** comments with that stated phrase..)^^^
the tacks were done with a non gas mig (possibly giving it that flux core look) . but fully welded with a 75/25 argon c02 mix. heat at C and wire speed at 4...
look i know tony doesn't have a ton of experience. but he has fusion between joints, the machine is set right too. i know this since i asked my dad who has been a professional welder for 32 years. he said those welds should have a sheared strength to 70,000psi. again im not a welder, this is coming from my dad who does government military contracts at his shop.
but honestly the real test is going to be on the street/track. yes, im going to have my dad look everything over. but tony has been so good to me guys, i honestly couldn't have asked for a better person. it bothers me to see so much negative things going towards him. i know you guys mostly only know what you see here but i know him personally, and consider him a very very good friend. we help each other out, outside of just him working on my car. i can't count how many times he has gone out of his way to do stuff for me without me even asking. hell he went to pick up parts for me one time at 1am on a weekday!
i guess its just going to be a wait and see. i appreciate all of you guys trying to look out for me and care for other guys in the community, but i am willing to 100% give tony a chance with my car, and personally i wouldn't trust anyone else. lets see the outcome and see the stone cold hard fact.
PS: i do attend drift events frequently, i plan to push this car to its breaking point
^^^( please no smart *** comments with that stated phrase..)^^^
As for the chromoly tube tube in the front bar, like said that was just poor material planning. The fact that you say you wouldn't trust anybody else is just absurd given what I am seeing come out of this "shop" and builder. I'm not trying to bash anyone but that subframe looks unsafe, plain and simple, and is not the type of quality I would pay money for or even feel comfortable putting on my car. I sincerely hope you make it home safely if you are driving the car back. With the stresses those steering rack mounts will see, I would fear for my life driving that car.
Joined: Mar 2001
Posts: 30,818
Likes: 656
From: FL-->NJ/NYC again!
Junior Member
Joined: May 2008
Posts: 25
Likes: 0
From: San Diego, Cali
Dam! It's good you guys look out for each other on this form. I have spoke to Tony on the phone seems like a cool and honest guy. Glad this all came out before i sent him some money. Good looking guys.
i say what i want
Joined: Aug 2002
Posts: 1,866
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From: richmond, va
Junior Member
Joined: Nov 2011
Posts: 8
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From: cleveland
