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post #1 of 9 (permalink) Old 12-12-2004, 09:37 AM Thread Starter
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trains loop

what is a trains loop and how does it work?
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post #2 of 9 (permalink) Old 12-12-2004, 11:43 AM
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its supposed to keep the driveshaft in place should a joint fail. our cars have 2 from the factory

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post #3 of 9 (permalink) Old 12-12-2004, 12:02 PM Thread Starter
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so we dont need to put one on our cars right?
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post #4 of 9 (permalink) Old 12-12-2004, 05:46 PM
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well i dont know how good they are if your planning on racing it. they are fine for the street .

64 ford galaxie -FE powered beast!- sleeping giant
69 cougar standard- 347/c6 -efi restomod, heidts prog 4 link heavily modified front, custom strutrods boxed lowers rollerperches 620 lowering springs! meier shock tower brace
96 f150 supercab lifted beast! 351 powered beast
87 shasta roadmaster 29ft travel trailer- pimpdaddy camping!
mn12 less!
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post #5 of 9 (permalink) Old 12-12-2004, 05:49 PM
 
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I wouldn't trust them for racing. I don't think that they are even welded on, and they're pretty thin, too.
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post #6 of 9 (permalink) Old 12-12-2004, 07:01 PM
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Here is a picture that shows the stock driveshaft loops:



As you can see in the picture, they do not completely encircle the driveshaft and are bolted to the car. I don't have my NHRA rulebook with me, but I don't think you need to upgrade these unless you're running some serious times at the track.

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post #7 of 9 (permalink) Old 12-12-2004, 08:31 PM Thread Starter
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thats not a thunderbird is it?
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post #8 of 9 (permalink) Old 12-12-2004, 08:37 PM
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That's the underside of my 90 Cougar XR7, which is the same body platform as any 89-97 Tbird/Cougar (MN12). It may look a little different than the average Tbird/Cougar because the fuel tank is out, and due to the aluminum centersection and aluminum lower control arms that I installed.

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90 XR7-The Meth Addict-KB SC'd 5.0L DOHC Stroker
2004 Mustang GT-The Driver-Intake/Exhaust/3.73's
1995 F150 4x4-The Mud Toy-5.0L/4R70W/33's/Warn 8274 Winch
94 LX w/Splitport 3.8L from 2000 Mustang - SOLD
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post #9 of 9 (permalink) Old 12-13-2004, 12:26 PM
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NHRA rules require if you run slicks, you must have a drive-shaft loop that completely encircles the entire circumfrence of the shaft.

I dont care if you 16.50's...if you tech with slicks, and they want to have a peek, you better have one.

For the record, the factory driveshaft loops in that pic will satisfy most tech inspectors...because most of them dont know the difference between an over-flow bottle, and an empty coke can spraypainted black.

For the most part, NHRA rules are simply in place for your own safety, and that of other racers/spectators. if they want you to have a bigger loop, there is a reason for it.

they can be made/purchased/installed very easily. contact your local exhaust shop. Most of them will gladly weld up some flat iron for you. They even sell a nice two-piece design at summit so you can install a loop without removing the driveshaft.
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