Driveshaft loop, where, how?
Thread Starter
Melting Slicks
Joined: Dec 2004
Posts: 2,137
Likes: 5
From: Howard PA
Driveshaft loop, where, how?
From my local dragstrip...
I'm gettin' the itch and I'm pretty sure my LT4 is going to go faster than 13.99, at least I hope it would! How are you supposed to install a driveshaft loop with the C beam? Also is it supposed to be like 12" back from the tailshaft?
BTW, I'd put this in Drag Racing but C4 tech seems a better place, you think?
If your car runs 13.99 or faster (100 MPH) you must also have a drive shaft loop.
BTW, I'd put this in Drag Racing but C4 tech seems a better place, you think?
Elite Torch Red Member
Joined: Sep 1999
Posts: 57,805
Likes: 23
From: Exit 89 GSP,Lakewood,NJ The Land Of Mojo
Cental/South NJ Events Coordinator
CI 1-2-3-4-5-6-7-8-9-10-11-12 Vet
CI-II Burnout & Drag Champ
St. Jude Donor '03-'04-'05-'06-'07
Originally Posted by ALLT4
BTW, I'd put this in Drag Racing but C4 tech seems a better place, you think?
Here goes.
The attached pics are of Mackeys driveshaft loop. It's a universal kit from Summit or Jegs, about $25.
He had to do some customizing, but it gets the job done.
Elite Torch Red Member
Joined: Sep 1999
Posts: 57,805
Likes: 23
From: Exit 89 GSP,Lakewood,NJ The Land Of Mojo
Cental/South NJ Events Coordinator
CI 1-2-3-4-5-6-7-8-9-10-11-12 Vet
CI-II Burnout & Drag Champ
St. Jude Donor '03-'04-'05-'06-'07
BTW, most tracks don't check for it, not many of us have loops and we are all in the 12's or quicker.
Safety Car
Joined: Apr 2004
Posts: 4,532
Likes: 7
From: Lahaina Hi
I bought mine on line from that guy that has the c-brace bolt things.
My computer crashed last week and I lost all my links.
He is expensive anyway.
Yes your car will kill the 13.49 rule but I think 12.99 most tracks will let you slide.I also bought my half shaft loops from www.dragvett.com he is a great guy to do business with.I got those because I have to sit in my car pucker factor.
Need a roll bar tooooooooooo if you have a vert.
Coupe 11.49 roll bar needed.
The track asks me about the drive shaft loop but they have never looked.
Can't crawl under a vet.
My computer crashed last week and I lost all my links.
He is expensive anyway.
Yes your car will kill the 13.49 rule but I think 12.99 most tracks will let you slide.I also bought my half shaft loops from www.dragvett.com he is a great guy to do business with.I got those because I have to sit in my car pucker factor.
Need a roll bar tooooooooooo if you have a vert.
Coupe 11.49 roll bar needed.
The track asks me about the drive shaft loop but they have never looked.
Can't crawl under a vet.
Thread Starter
Melting Slicks
Joined: Dec 2004
Posts: 2,137
Likes: 5
From: Howard PA
Thank you for the quick answers. I think my dragstrip will notice. Their scales are a ramp type with an open bottom you can walk right under. They'll see it.
After looking at those pictures I seem to recall the last loop I bought was a two piece set up. I guess I'll just use half of it.
Oh, one other thing, I can see the point of a loop but has anyone ever seen a car pole vault on a broken shaft? For real I don't think I've ever seen a shaft U joint break in person or on any video. Maybe they all have loops.
After looking at those pictures I seem to recall the last loop I bought was a two piece set up. I guess I'll just use half of it.
Oh, one other thing, I can see the point of a loop but has anyone ever seen a car pole vault on a broken shaft? For real I don't think I've ever seen a shaft U joint break in person or on any video. Maybe they all have loops.
Last edited by ALLT4; May 22, 2005 at 01:41 AM.
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
Mine is very similar to Mr. Mojo's. I just bought a universal driveshaft loop kit from Summit and bolted half of it around the toqrue arm. The way this this is designed there is no way it's coming out. As such though the track has never looked, and likely never will. The guy who owns our local track is way too cheap to care at all about safety standards. He'd have to pay someone to enforce them.
Elite Torch Red Member
Joined: Sep 1999
Posts: 57,805
Likes: 23
From: Exit 89 GSP,Lakewood,NJ The Land Of Mojo
Cental/South NJ Events Coordinator
CI 1-2-3-4-5-6-7-8-9-10-11-12 Vet
CI-II Burnout & Drag Champ
St. Jude Donor '03-'04-'05-'06-'07
Originally Posted by ALLT4
Oh, one other thing, I can see the point of a loop but has anyone ever seen a car pole vault on a broken shaft? For real I don't think I've ever seen a shaft U joint break in person or on any video. Maybe they all have loops.
BTW, I forgot to mention, but at least on LT1 cars, the exhaust runs under the driveshaft and C-beam, so the shaft wouldn't fall down, but it could shoot up. Our driveshafts are already surrounded 3/4 of teh way around, but a loop is still good to have for that remaining 24%.
But as one GM employee once told me, the halfshast are designed to twist and break before anything else, so painting lines across the shaft and monitoring any twist wil let youknow it's time for replacement, and I also know of some racers on here who replace all six U-Joints every year regardless.
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From: Former NCM Drag Racing coordinator, National director Corvette Challenge Spring Hill, Tennessee: Whiting, New Jersey
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Stay tuned fokes, my entire drive train will be 4 sale soon.
So that C-beam will be 4 sale.
So that C-beam will be 4 sale.
