Driveshaft Safety Loop Q's

[67Rally]

Here are the quotes:

With a driveshaft loop you are pretty limited, the X has to go behind the safety loop.

And

The NHRA required driveshaft safety loop has to be within a few inches of the front U-joint. I wish I had a photo of mine to show.
I like the DR. Gas X setup, all these others are copies.
The X has to go behind the safety loop.

[DBasher]

Learn something new everyday. Let me ask ya, if its mounted 6" off the front and the rear joint breaks would it hit the ground?

The only loop I've put on is our Studebaker and its more toward the rear. I know that where its located either end can break and neither hit the ground. Just curious.

Dan

[67Rally]

Originally Posted by DBasher

Learn something new everyday. Let me ask ya, if its mounted 6" off the front and the rear joint breaks would it hit the ground?

The only loop I've put on is our Studebaker and its more toward the rear. I know that where its located either end can break and neither hit the ground. Just curious.

Dan

Yes, it would still hit the ground, but it would just drag. I think the real fear is that if the front lets go, it could tear up the tunnel and anything (anyone) directly above it.

There's no reason why you couldn't run two loops. One front and one rear, but the NHRA rules require only the front one.

[OBeer-WAN-Kenobi]

Originally Posted by 67Rally

...I think the real fear is that if the front lets go, it could tear up the tunnel and anything (anyone) directly above it....

Not to mention, possibly pole vaulting the car ass over tea kettle.

[67Rally]

Originally Posted by OBeer-WAN-Kenobi

Not to mention, possibly pole vaulting the car ass over tea kettle.

Has this ever really happened?

[intocarss]

Originally Posted by 67Rally

Has this ever really happened?

i HAVE HEARD IT HAS BUT NEVER SEEN ONE LIVE (THANK GOD) I HAVE SEEN THE FRONT OF A DS BREAK, HIT THE GROUND AND THEN FOLD IN HALF AND TAKE OUT A REAR TIRE

THEY SAY THIS HAPPEN BECAUSE OF THE DS BREAKING AT THE FRONT IDK HARD TO TELL

@ 8 SEC

[DRJDVM's '69]

I think Myth Busters did an experiment with trying to launch the car with a broken driveshaft....if I'm remembering correctly, they couldn't get a car to do it....

[intocarss]

Originally Posted by 67Rally

Yes, it would still hit the ground, but it would just drag. I think the real fear is that if the front lets go, it could tear up the tunnel and anything (anyone) directly above it.

There's no reason why you couldn't run two loops. One front and one rear, but the NHRA rules require only the front one.

SOME CARS IN NHRA REQUIRE 2 LOOPS

[67Rally]

Originally Posted by intocarss

SOME CARS IN NHRA REQUIRE 2 LOOPS

I wasn't even thinking about those classes. That was me speaking out of ignorance, thanks for pointing that out.

[NvrDun71]

Fighting a similar packaging issue, it seems magnaflow likes to put the x-pipe in there exhaust kits right inline where a DS loop would go per NHRA spec