Tube Chassis Subaru Engine build, Lots of new progress Options

[tazz9924]

A lot of progress! ill be brief because im tired but i basically reversed a week of work by cutting the back half apart allowing me to move houses. Next i set up my garage and car and got to work. I leveled the chassis and began work on the rear suspension in many many frustrating hours of work paid off by being able to sut back and look at what ive done.

[bkrantz]

I get dizzy looking at the tubing angles in front of those "creative" wall designs. Are you sure things are straight?

[Andyrew]

Sweet! Love the progress!

[Andyrew]

Also that Beat is Sweet!!!

[tazz9924]

I get dizzy looking at the tubing angles in front of those "creative" wall designs. Are you sure things are straight?

Oh i know! i had to put up a shelf and i was totally convinced it wasn’t level, it drove me crazy

[tazz9924]

Its a roller kinda! I added a strut bar on the back and let the jack rip. Unfortunately i still need to “mount” the subframe. At the very least better, because as it rolls its held by hopes and dreams. But hey its celebration time (IMG:style_emoticons/default/cheer.gif)
Two of the bars are temporary that are on the subframe btw.

[Carbon-14]

Observations from afar,
looking forward to the 914 skins, suitably modified to be sleek, a stiff chassis to allow competitive performance.
Subaru power, should go, like.

SolidWorks or a similar cad sw.
Basically, a GT40 replica's tube chassis, modelled in balsa, or Z88 fea, to plan the performance and weight.
https://www.google.com/search?q=tube+chassi...540&bih=746
https://fem-heroes.org/example-structural-e...-tubular-frame/
https://www.youtube.com/watch?time_continue...eature=emb_logo
https://www.ansys.com/about-ansys/advantage...ronger-race-car

[Carbon-14]

Those new fangled jackstands have me wishing they were wired shut, to insure they don't collapse, snafu.
Be safe.

[tazz9924]

Those new fangled jackstands have me wishing they were wired shut, to insure they don't collapse, snafu.
Be safe.

They arent the harbor freight ones, they are some amazon brand. So hopefully death isnt close?

[tazz9924]

Observations from afar,
looking forward to the 914 skins, suitably modified to be sleek, a stiff chassis to allow competitive performance.
Subaru power, should go, like.

SolidWorks or a similar cad sw.
Basically, a GT40 replica's tube chassis, modelled in balsa, or Z88 fea, to plan the performance and weight.
https://www.google.com/search?q=tube+chassi...540&bih=746
https://fem-heroes.org/example-structural-e...-tubular-frame/
https://www.youtube.com/watch?time_continue...eature=emb_logo
https://www.ansys.com/about-ansys/advantage...ronger-race-car

The rear section looks quite similar to what i have planed. I just have to change it a bit because i dont have any good mounting spots on the subframe to allow me to do that exactly.

[Carbon-14]

https://www.youtube.com/watch?v=ct7vmJkbt60


Information overloading, to determine the rigidity and weight of the chassis, from Maserati birdcage, to Porsche 918.
Lighter, stronger, stiffer, faster, quicker, all the factors of a homebuilt -14. Have mig, will travel.

https://www.caelinux.com/CMS3/
https://openscholarship.wustl.edu/cgi/viewc...context=mems411
http://www.vintageperformancemotorcars.com...ted%20frame.htm
https://www.code-aster.org/V2/spip.php?article912
https://www.finiteelementanalysis.com.au/fe...tin-motorsport/
.

[tazz9924]

Ill admit im a little stumped... Call it: i want to make the best decision but require the input of others to feel comfortable. So i need to mount the rear subframe but unlike most of the stages so far this to me seems less obvious. My big issue is how to best mount it when the mounting plate is 90 degrees to the direction my bars are coming at. Heres a picture of what im dealing with: (the red highlights are the subframes mounting spots)

I also have a nifty drawing showing where the trans will sorta sit when its on:

My initial reaction is to add a bent tube meeting up with the bottom of the main hoop and some tubes linking the bar above it with the bent tube shown:

Alternatively i could add a tube with just a 90 bend in it meeting up maybe 6 inches lower than the parallel bar above it kinda like this with some more reinforcement tubes:

This is my dilema, any input is appreciated. Even just linking someone engineeringly minded would help my cause!
@Carbon-14 ?

[76-914]

Ill admit im a little stumped... Call it: i want to make the best decision but require the input of others to feel comfortable. So i need to mount the rear subframe but unlike most of the stages so far this to me seems less obvious. My big issue is how to best mount it when the mounting plate is 90 degrees to the direction my bars are coming at. Heres a picture of what im dealing with: (the red highlights are the subframes mounting spots)

I also have a nifty drawing showing where the trans will sorta sit when its on:

My initial reaction is to add a bent tube meeting up with the bottom of the main hoop and some tubes linking the bar above it with the bent tube shown:

Alternatively i could add a tube with just a 90 bend in it meeting up maybe 6 inches lower than the parallel bar above it kinda like this with some more reinforcement tubes:

This is my dilema, any input is appreciated. Even just linking someone engineeringly minded would help my cause!
@Carbon-14 ?

Pm curbandgutter. I was just talking to him about your car. He is finished with his tube frame build. Well that portion any way. His is stretched and widened. Rudy is his name @Curbandgutter

[Carbon-14]

https://www.youtube.com/watch?v=MjkLr9CWlHk


https://robotics.ee.uwa.edu.au/theses/2011-...me-Waterman.pdf
The references noted are good reads to get a handle on building a stiff chassis, like the racers of the past seventy years. Compromises and assumed risk are some of the factors in welding up the frame, testing it's strength and performance on the skid pad. There is an incredible wealth of information and examples and now, available software to simulate and stress test the cages, chassis, and suspensions.
The answers to all the questions are there, and for sure it's all been tried before.
For casual street use, a less substantial box would be enough, a racing cage would of course be much more robust, heavier and neccessarily torsionally stiffer, some survivability built in. Twelve hundred horsepower turbo engine in an 1800 lb racecar would be very quick, if kept under control, while racing.
Looking forward to the solutions and installations of the drivetrain and suspension.

https://www.youtube.com/watch?v=iIKHocge9Sc

[tazz9924]

I have an easily digestible build up date in the form of a youtube video!

https://www.youtube.com/watch?v=5jXG65IEicw

I also have a good regular update coming up!

[EdwardBlume]

Damn this thread is sexy! (IMG:style_emoticons/default/beer3.gif)

[andrewb]

I always love the famous 'can do' attitude of you Americans. No surprise that there have been so many amazing achievements that depended on guts and determination.

I was already gobsmacked (that's a good old English word) when this thread started that someone could just kick off with a bare garage floor and build a tubeframe chassis from nothing. Just for kicks he then moves to a psychedelic chamber - to make it even harder ??

And then the welding mask comes off .................and he's young enough to be ....I dunno, I give up. Utmost respect to you Elliott - how you've achieved those skills and depths of understanding in such a short time I'll never know. I wonder what you'll be achieving in 10 more years. Keep it up.

Regards

Andrew

[tazz9924]

I always love the famous 'can do' attitude of you Americans. No surprise that there have been so many amazing achievements that depended on guts and determination.

I was already gobsmacked (that's a good old English word) when this thread started that someone could just kick off with a bare garage floor and build a tubeframe chassis from nothing. Just for kicks he then moves to a psychedelic chamber - to make it even harder ??

And then the welding mask comes off .................and he's young enough to be ....I dunno, I give up. Utmost respect to you Elliott - how you've achieved those skills and depths of understanding in such a short time I'll never know. I wonder what you'll be achieving in 10 more years. Keep it up.

Regards

Andrew

I appreciate the kind words, you have a good one!

[tazz9924]

Ok this is the last update for probably a couple weeks because i have to go racing in wyoming, but, i settled on a design to tie in the rear subframe. This involved one tube bend and then notched in three places. I didn’t know if id like it going in, but it came out killer. Thanks to my chassis builder friend who suggested the idea, then helped me build it!

[rhodyguy]

Are you back in Tacoma?