Random thoughts thread - Page 189 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Exhaust · 05-09-2012, 12:19 AM

Quote:

Originally Posted by Snoopyalien24

This post is literally, filled with so much win.

serialk11r · 05-09-2012, 12:22 AM

Hmmm speaking of aluminum, how is bonded aluminum usually repaired? I imagine you can't weld it, or the heat would damage the nearby epoxy...

But yea, the FSAE guys at my school apparently had a lot of issues with fatiguing parts especially since they try extra hard to shave mass off. I imagine frame damage isn't a big deal if you can repair it such that there isn't extra stress where there used to not be, but that's probably difficult to do.

MF_DEUCE · 05-09-2012, 12:28 AM

Quote:

Originally Posted by ichitaka05

Last week Monday, I jogged a mile & took me 21 mins (yes, you can laugh). Today, I jogged a mile & took me 10.30 mins...

Still long way to get it in 7 mins...

impressive sir!

A year ago i used to average around 10min miles and my best was a little below 9:30. Now I run 5k and 10k runs with 7minute miles. So, like anything else all it takes is hard work, dedication, and persistence!

I'm currently addicted and working on doing obstacle runs such as: Spartan Race, Tough Mudder, & Run For Your Lives. My goal is to complete the Spartan Trifecta next year!

serialk11r · 05-09-2012, 12:40 AM

10:30 is really good! LOL
I ran/fastwalkedwhenigottired downhill to the train station in about 10 minutes, 1 mile. Last time I ran in high school (like 3 years ago) I would be happy if I got under 11:30 :P

Snoopyalien24 · 05-09-2012, 12:48 AM

Hmm whats the smart thing to do....?

Save up like 7k and buy an amazing 240sx with an SR or a RB pullin 300hp+ or us that 7k for a BRZ down in about 2 years, after I graduate college?

This will also be my first real car...

Dimman · 05-09-2012, 12:55 AM

Quote:

Originally Posted by serialk11r

Hmmm speaking of aluminum, how is bonded aluminum usually repaired? I imagine you can't weld it, or the heat would damage the nearby epoxy...

But yea, the FSAE guys at my school apparently had a lot of issues with fatiguing parts especially since they try extra hard to shave mass off. I imagine frame damage isn't a big deal if you can repair it such that there isn't extra stress where there used to not be, but that's probably difficult to do.

And welding it kills any heat treat strength.

Unfucking big, structural aluminum is a pain in the ass.

They could maybe drill out the rivets, unbond the epoxy (?) and completely replace the damaged area with new stuff.

serialk11r · 05-09-2012, 01:17 AM

Quote:

Originally Posted by Dimman

And welding it kills any heat treat strength.

Unfucking big, structural aluminum is a pain in the ass.

They could maybe drill out the rivets, unbond the epoxy (?) and completely replace the damaged area with new stuff.

Completely replace? I'm looking at pictures of the chassis, and it appears that it is essentially only a handful of f-ing gigantic extrusions... I suppose completely replacing pieces of it is the only way!

Just a stupid wild guess, but if the damage is "local", maybe it would be possible to cut any permanently deformed areas out and epoxy in a "patch" (of aluminum)? Still extremely expensive of course.

Dimman · 05-09-2012, 01:35 AM

Quote:

Originally Posted by serialk11r

Completely replace? I'm looking at pictures of the chassis, and it appears that it is essentially only a handful of f-ing gigantic extrusions... I suppose completely replacing pieces of it is the only way!

Just a stupid wild guess, but if the damage is "local", maybe it would be possible to cut any permanently deformed areas out and epoxy in a "patch" (of aluminum)? Still extremely expensive of course.

I'm just speculating, plus adding what I know about aluminum, which is why I mentioned Ryephile. He probably has at the very least some reliable 2nd hand information on what to look for on potentially damaged Lotus chassis.

Guff · 05-09-2012, 01:36 AM

Quote:

Originally Posted by Dimman

I'm just speculating, plus adding what I know about aluminum, which is why I mentioned Ryephile. He probably has at the very least some reliable 2nd hand information on what to look for on potentially damaged Lotus chassis.

Just start TIG welding and see what happens!

Dimman · 05-09-2012, 01:38 AM

Quote:

Originally Posted by Guff

Just start TIG welding and see what happens!

T0 happens. Compare that to T4 or T6.

Guff · 05-09-2012, 01:46 AM

Quote:

Originally Posted by Dimman

T0 happens. Compare that to T4 or T6.

So heating the already tempered Aluminum changes it's tensile strength that much? I'm new to Materials and have minimal (basically none) welding experience on Al.

Edit: But re-heat-treating can bring the welded Al back to T4-T6 properties (as can age), so perhaps welding on a piece of the frame is viable?

Dimman · 05-09-2012, 02:10 AM

Quote:

Originally Posted by Guff

So heating the already tempered Aluminum changes it's tensile strength that much? I'm new to Materials and have minimal (basically none) welding experience on Al.

Edit: But re-heat-treating can bring the welded Al back to T4-T6 properties (as can age), so perhaps welding on a piece of the frame is viable?

The heat-treatment issue is a theoretical vs practical problem. Car chassis are big and have lots of stuff attached (and in the Lotus case, high-tech glued) to them.

Giccin · 05-09-2012, 02:46 AM

When someone does a engine overhaul. What really happens? Does it give the engine it's life back like a new engine?

Dimman · 05-09-2012, 02:49 AM

Quote:

Originally Posted by Giccin

When someone does a engine overhaul. What really happens? Does it give the engine it's life back like a new engine?

Depends how much money you spend.

I got to be a 'shitty' teacher today. Korean ESL student was ecstatic to learn how to use 'bullshit' properly in English.

05-09-2012, 12:48 AM	#2637
Snoopyalien24 Mr. Sarcasm Join Date: Sep 2011 Drives: 2016 VW Jetta TSI Sport 5-Speed Location: South Florida Posts: 3,729 Thanks: 1,275 Thanked 753 Times in 491 Posts Mentioned: 34 Post(s) Tagged: 4 Thread(s)	Hmm whats the smart thing to do....? Save up like 7k and buy an amazing 240sx with an SR or a RB pullin 300hp+ or us that 7k for a BRZ down in about 2 years, after I graduate college? This will also be my first real car... __________________ Get your very own FT86CLUB T-shirts/keychains/goodies! CLICK HERE ]

05-09-2012, 02:46 AM	#2645
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