BlownMGB-V8 Jim Blackwood 9406 Gunpowder Rd., Florence, KY 41042 (6470 posts) Registered: 10/23/2007 12:59PM Main British Car: 1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS |
Re: Achtung!! TR6 frame reinforcement
What the TR6 frame mostly lacks is torsional rigidity and as much as those plates may stiffen the rear section, that isn't where the strength is most needed. IMHO
JB |
Moderator Curtis Jacobson Portland Oregon (4577 posts) Registered: 10/12/2007 02:16AM Main British Car: 71 MGBGT, Buick 215 |
Re: Achtung!! TR6 frame reinforcement
The idea of adding a thin "stressed skin" to a frame is generally good. You'll see stressed skins on lots of spaceframe based racecars from the early seventies on. The areas you see "skinned" in the photographs are basically trapezoidal, and when a load (e.g. engine torque) is applied at one corner, the whole trapezoid is inclined to lose its shape. I guess you could say that the stressed skins act like great big - but lightweight - gussets. If a skin on one side is good, perhaps a skin on both sides would be even better. To avoid corrosion issues (and heat caused distortion/stress) this guy could have used a structural epoxy. (The skins could have continued over the top surface of the frame tubes to facilitate this.) With epoxy, galvanized steel, stainless, aluminum, or a structural composite might possibly have been substituted for the plain steel skins. When racers use adhesive to apply a metallic stressed skin, they typically also use pop rivets. The rivets are nowhere near as strong in shear, but they hold the panel in place nicely until the adhesive cures. (Most adhesives are strong in shear but weak in "peel".) You could also make a case for soldering or brazing on steel skins instead of welding. Are you familiar with gas shielding gas for brazing torchs? Expensive, but good!
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DiDueColpi Fred Key West coast - Canada (1365 posts) Registered: 05/14/2010 03:06AM Main British Car: I really thought that I'd be an action figure by now! |
Re: Achtung!! TR6 frame reinforcement
Isn't that Megatron from the transformers?
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MGBV8 Carl Floyd Kingsport, TN (4512 posts) Registered: 10/23/2007 11:32PM Main British Car: 1979 MGB Buick 215 |
Re: Achtung!! TR6 frame reinforcement
If you want to glean more from the German website, I have been told that the Google translator for German to English is much improved.
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socorob Robbie La (173 posts) Registered: 09/17/2009 04:42PM Main British Car: 1963 Sunbeam Alpine Series 2 Ford 2.8 V6 |
Re: Achtung!! TR6 frame reinforcement
you can also download babel fish to translate text, last i looked it was still free but its been a little while. Most online translators translate word for word so you kinda only get the jist of it, but it is helpful.
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rickv Rick Vandenberg Arvada, Colorado (13 posts) Registered: 12/31/2010 12:26PM Main British Car: 1972 Triumph TR6 Chevrolet 350 |
Re: Achtung!! TR6 frame reinforcement
There are a lot more effective ways to strengthen a frame. If that thing gets twisted, will it come back? It would be pretty discouraging to here a loud "POP" under seat.
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BlownMGB-V8 Jim Blackwood 9406 Gunpowder Rd., Florence, KY 41042 (6470 posts) Registered: 10/23/2007 12:59PM Main British Car: 1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS |
Re: Achtung!! TR6 frame reinforcement
Rather a novel approach to be sure, and one that will certainly strengthen the LCA pivot box and the spring perch as well. 3/16" thick material is overkill though, 1/8" should be more than adequate and .093" would do just fine.
JB |
motek George Smathers Spokane, WA (118 posts) Registered: 09/12/2009 02:45PM Main British Car: 1967 Morris Minor (48 hp @ crank!), 1971 TR6 302 |
Re: Achtung!! TR6 frame reinforcement
Byron,
I like it! I agree with Jim - since the tower is made of tissue paper 3/16" is overkill. George |
Re: Achtung!! TR6 frame reinforcement
Thanks Jim and George for your comments. I agree that 3/16" is overkill so I will go to 1/8". I prefer staying with thicker material as my welding skills are not there for using thinner material.
For anybody out there that would like to do the same just contact me and I will e-mail my drawings. I am sure every frame is slightly different so what may work with my frame may need to be tweaked with another frame. I will probably work up drawings for the sheet metal enclosures as well. Sigh more work now!! |
302GT Larry Shimp (241 posts) Registered: 11/17/2007 01:13PM Main British Car: 1968 MGB GT Ford 302 crate engine |
Re: Achtung!! TR6 frame reinforcement
Can you supply the link to the German web site? I can sort of read German....
The suspension geometry is most affected by the stability of the trailing arm pivot points. Flexing of the spring seats mainly affects roll resistance (which is important also). I like the approach to run braces from the trailing arm supports to the spring seats because it adds a three dimensional element to an otherwise flat frame. |
Re: Achtung!! TR6 frame reinforcement
Larry I stumbled across this link when I googled TR6 and clicked on TR6 images. I randomly clicked on this one image of a silver green TR6 and it was this German website. I have tried many times to find it again but have had no luck.
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rwrooks Rob Rooks Boston (5 posts) Registered: 05/31/2015 01:13PM Main British Car: 76 TR6 BMW 3.2L I6 |
Re: Achtung!! TR6 frame reinforcement
Byron, Did you proceed with your bracing modification between the LCA pivot box and the spring perch? It looks to be the best frame stiffening remedy I have come across! What were your results?
Also, did the modification to the body interfere with the seat travel? Would love to see a picture. Thanks, Rob |
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