C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Drag Racers...Driveshaft Loop?

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Old Nov 16, 2001 | 01:56 PM
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Default Drag Racers...Driveshaft Loop?

Big race next week. Normally tech is fairly easy on everyone but I know they're gonna be picky for this event. So, what driveshaft loop are you guys using? Anything special I need to watch out for? Thanks.
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Old Nov 16, 2001 | 02:49 PM
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Default Re: Drag Racers...Driveshaft Loop? (MJ)

Though I don't use one yet, I'd think anyone that is NHRA and fits your application. And are they realy going to go under there and check it out?
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Old Nov 16, 2001 | 03:36 PM
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Default Re: Drag Racers...Driveshaft Loop? (MJ)

NHRA requires a drive shaft loop for cars running 13.99 or quicker. 13.00 or quicker on street tires. I'm not there, yet. I am interested in any responses you get, because I can't imagine a "universal" model as being easily adapted to our cars. Good luck at the races.

CFI-EFI
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Old Nov 16, 2001 | 03:39 PM
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Default Re: Drag Racers...Driveshaft Loop? (CFI-EFI)

What kind of loops are you guys running?
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Old Nov 16, 2001 | 03:54 PM
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Default Re: Drag Racers...Driveshaft Loop? (CFI-EFI)

I can't imagine a "universal" model as being easily adapted to our cars
That's exactly what I was thinking. I'm sure Mackey and Panuzzo have one in theirs, I just dunno which one and what needed to be modified.
Thanks again,
Mike Renfro
Honolulu, Hawaii


[Modified by MJ, 9:55 AM 11/16/2001]
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Old Nov 17, 2001 | 01:00 PM
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Default Re: Drag Racers...Driveshaft Loop? (MJ)

TTT
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Old Nov 17, 2001 | 11:23 PM
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Default Re: Drag Racers...Driveshaft Loop? (MJ)

I can't imagine a "universal" model as being easily adapted to our cars
That's exactly what I was thinking. I'm sure Mackey and Panuzzo have one in theirs, I just dunno which one and what needed to be modified.
Thanks again,
Mike Renfro
Honolulu, Hawaii


I've got a Lakewood LOOP IN MY CAR.

[Modified by MJ, 9:55 AM 11/16/2001]
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Old Nov 18, 2001 | 01:36 AM
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Default Re: Drag Racers...Driveshaft Loop? (CHarris85Vette)

i believe NHRA calls for them on any non straight axle car but when i went nobody checked-- just looked for all the bottles, lugnuts etc, said nice car and i went away
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Old Nov 18, 2001 | 03:03 AM
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Default Re: Drag Racers...Driveshaft Loop? (MJ)

I welded a piece of aluminum to close up the "U" support from the rear to the tranny... ablout 10" from the rear of the tranny.
I've broken a driveshaft at 140 mph and it was ugly.
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Old Nov 18, 2001 | 03:30 AM
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Default Re: Drag Racers...Driveshaft Loop? (mackeyred96)

Thanks John.
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Old Nov 18, 2001 | 09:26 PM
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Default

When you run slicks, you have to have a driveshaft loop too. They checked for my driveshaft loop when they saw my slicks in the back seat of my camaro.
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Old Nov 19, 2001 | 12:22 AM
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Default Re: (BAdAzZV8)

What? My bent up coathanger doeset pass inspection? :crazy: :jester
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Old Nov 19, 2001 | 08:58 AM
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Default Re: Drag Racers...Driveshaft Loop? (MJ)

I made one by bending a piece of 2 1/2" wide x 1/4" thick steel into a U shape that will fit over the stock C channel torque arm. In essence boxing the drive shaft in. I removed the drive shaft to drill holes on the stock C channel and bolted them in together. Neat and Clean, Passes NHRA rules, and you don't have drill through your floor or pull up the carpet.

Dennis
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Old Dec 1, 2001 | 07:46 PM
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Default Re: Drag Racers...Driveshaft Loop? (chasenme)

I went the "C" channel route use carrage bolts "smooth rounded heads" so you have as much clearence as possible The "C" channel route is also the lightest way to go.
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Old Dec 1, 2001 | 07:53 PM
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Default Re: Drag Racers...Driveshaft Loop? (ASRoff)

Aluminum Flat stock bolted to the C Channel here too.
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Old Dec 1, 2001 | 11:23 PM
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Default Re: Drag Racers...Driveshaft Loop? (LT401Vette)

Thanks guys, I'm goin with the "closed in C beam route" too.

Aloha,
Mike Renfro
Honolulu, Hawaii :cheers:
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Old Dec 1, 2001 | 11:53 PM
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Default Re: Drag Racers...Driveshaft Loop? (MJ)

I've got a Lakewood for personal use, I don't think my car needs it, and I'm certainly not going to be breaking 12.99 or better, unless I get it tuned better...

Anyways, mine wouldn't pass an inspection, I only used one piece of the four piece $27 unit. I bolted it to the stock ladder bar.

I did go 6-8 inches as per NHRA spec, but its not bolted on on top, so it wouldn't pass an ispection, but it would stop the drive-shaft from hitting me in the butt. :)
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