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Race Car Fabrication There is a lot of cool fabriaction going on the race car industry, show us what you got.


Race Car Fabrication There is a lot of cool fabriaction going on the race car industry, show us what you got.

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  #1  
Old 02-08-2016, 09:35 AM
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turbo manifold

I've tried for 2 days know trying to get the concept of the 3d header desighn in bentech pro. Every time I try to start making the pipe soon as I get to a bend next to another bend it go's haywire and connects the two runners and makes a random pipe out of nowhere.
I just purchased a muffler shop ram style exhaust bender off ebay and waiting for it to be shipped so my dies are not set up in the program. I was using what comes in the software 1.75.
BTW it is a old AMH bluboy does anyone on here have the die sizes set up in bend tech.
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Old 02-08-2016, 10:30 AM
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R.DesJardin R.DesJardin is offline
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Welcome to the forum. Can't help with the header design module but a exhaust pipe bender will not make good bends for a header or exhaust manifold. A mandrel bender is used for smooth tight radius bends used in exhaust manifolds.
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  #3  
Old 02-08-2016, 10:41 AM
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I'm still going to do it regaurdless. I need help with the software anyone?
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Old 02-08-2016, 11:54 AM
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I supposed next yur going to tell me I can't bend stainless steel tubing on my bender to right😂
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  #5  
Old 02-08-2016, 11:57 AM
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JaysinSpaceman JaysinSpaceman is offline
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I am sure that Cris will be along soon with some help. Have you called Bend Tech, they have always been very helpful for me. They've pointed me towards videos or just given me advice.

I get that you are still going to build your headers with a muffler shop bender but if you think that you're going to produce and sell headers you should really invest in the correct equipment. I would build a set of headers out of U bends long before I bought a set that was built with compression bends. But that's just me.

I don't know your plans, so I could be way off.

Good luck to you,
Jaysin
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Old 02-08-2016, 12:01 PM
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Quote:
Originally Posted by 1morello View Post
I supposed next yur going to tell me I can't bend stainless steel tubing on my bender to right😂
Wow. That's a real friendly response for someone that's asking for help. Being an a$$ here won't get you very far.

Jaysin
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  #7  
Old 02-08-2016, 12:11 PM
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WHEN AND WHERE IN THIS POST HAVE I STATED I WAS GOING TO PRODUCE AND SELL HEADERS.
CORRECT ME IF I'M WRONG BUT I'VE BEEN BASHED ON HERE THE SECOND I BECAME A MEMBah.
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  #8  
Old 02-08-2016, 12:33 PM
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Bashed eh? Sounded like suggestions to me. Sorry, I assumed that if you forked out the cash for a ram style muffler shop bender that you wold be building more the a set of headers for yourself. Last I checked a muffler bender was rather expensive.

Sorry for trying to help.

Good luck
Jaysin
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  #9  
Old 02-08-2016, 12:46 PM
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Quote:
Originally Posted by 1morello View Post
I'm still going to do it regaurdless. I need help with the software anyone?
Are you using BT-Pro or are you using the Header design module?

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Old 02-08-2016, 12:48 PM
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I'm module inside of pro
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  #11  
Old 02-08-2016, 12:48 PM
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Using
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Old 02-08-2016, 01:19 PM
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I'm going to recommend that you take advantage of the Help function in BT by creating the condition in a drawing/design and then in the Help function creating a Support Session with BT. The software support is really good at sorting out what is going on and will save you a bunch of time!

As to the bender you are going to have to create bends with your set-up and then correctly enter that data into the software. Once you have that done correctly you should be able to use the software and get really close, in my experience well within 0.020-Inch.
The catch to this is the old adage of 'Garbage in Garbage out' in that if you input anything that is incorrect you will not get the results you are trying to achieve.

If you have any other questions I will be happy to help where I can, but going straight to BT is generally the best and fastest way to resolve the problems you are experiencing.

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Old 02-08-2016, 01:31 PM
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👍
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Old 02-09-2016, 08:44 PM
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My other question is my roll cage that I need to build which is mainly why I purchased the bendtech pro.
Ivery looked up the new rules of the NHRA and they call for 1 3/4 o.d Minimum .118 wall mild steel.
Now what is legal.
DOM?
ERWS?
Schedule 40??
I'm getting mixed reviews on the Internet
I read a post somewhere guy used 2" schedule 40 for a full cage
Reviews:
Some say its too heavy
Some say it's legal
Some say it's illegal
DOM really review :
Some say It's cheaper
Some say it's stronger
Ect...
ERWS review:
It's stronger than Dom
It's lighter
Ect..
But I also read that ERWS and DOM yield the same tinsel strength
I'm lost and this is where I really need help.
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Old 02-10-2016, 12:05 AM
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ERW=Electrically Resistance Welded tube. My understanding from reading the rule books and talking with tech inspectors is that this is what the spec of 1 3/4" OD x .118 wall tube is based on.

DOM=ERW that has been "drawn over mandrel" (hence DOM). It is the same material as ERW but since it has been cold worked it has different properties, higher yield strength because of the cold working, lower ductility for the same reason, etc. The dimensional tolerances are closer (generally +/- .003" depending on the supplier) because it has been passed over and through sizing dies.

Schd 40= pipe to my knowledge is not acceptable, will not pass tech, for ANY racing safety cages. Unless you get a mill spec or lot certification you should not build any structures, let alone safety cages, from pipe.

Least expensive and most commonly used safe material for building safety cages is cold finished ERW. The more expensive DOM would be considered by some to be an upgrade, although this is regularly and hotly debated.

I don't know of any one on this forum that would recommend that you use pipe to build a cage.

Good luck,
Jaysin
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  #16  
Old 02-10-2016, 05:12 AM
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Any reason. Why I can't post attachments / pics of my build
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  #17  
Old 02-10-2016, 10:40 AM
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Look at the rules very closely. Unless the have changed, you could not use a compression style bender to bend the roll cages. An exhaust bender is a compression style bender. Some tracks let that slide, but if you are going to get you NHRA/IHRA cert then you need to get a clear answer on that.
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  #18  
Old 02-10-2016, 12:31 PM
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Quote:
Originally Posted by 1morello View Post
Any reason. Why I can't post attachments / pics of my build
Become a member or host the pics offsite and link to them.
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  #19  
Old 02-10-2016, 12:43 PM
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I don't think the car will be doin 9sec. Passes although low 10'self without a doubt.
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  #20  
Old 02-10-2016, 12:44 PM
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I thought I was a member
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