Question on NHRA rules about driveshaft loop - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Jefe · 05-06-2002, 10:09 PM

Where are you supposed to play the driveshaft safety loop? I thought there was a certain distance it has to be from rear differential but I am not sure what it is. Anyone knows or knows of a site...let me know..thanks!

Longhorn Man · 05-06-2002, 10:15 PM

Witha 2 pce shaft, I have no idea.
With a one pce shaft, 6 inches from the Tranny. It don't much matter id it comes off in the back. They are worried about doing a pole volt thing at 1/2 track.

------------------
'69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man
I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it.
FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite.
If you need a pic posted, E-mail me at longhornmail@yahoo.com
My name is Andy...not Randy...I'm in Ohio...Not Illinois...close enough?
Columbus Ohio

*Fast68Chevy* · 05-06-2002, 10:20 PM

i would think same distance from front of the rear shaft where it slides onto the end of the front shaft, on some 4 speed models that is, i think there is a factory loop on the 81 cutlass, was gonna rob it off the 79 de ville but forgot to before the roll back hauled it off.. i want ot instlal on under front of rear half under the 71,

good luck

fast_dev · 05-06-2002, 10:46 PM

must be 6 inches from back of tranny, needed if you go 13.99 or quicker on slicks or 13.00 or quicker on street tires. my local track didn't tell me that about the street tires, they assumed i was putting slicks on after tech inspection, but its not a bad idea to have one anyway. Devin

05-06-2002, 10:09 PM	#1
Jefe Registered User Join Date: Jul 2000 Location: Chandler, Arizona, USA Posts: 299	Question on NHRA rules about driveshaft loop Where are you supposed to play the driveshaft safety loop? I thought there was a certain distance it has to be from rear differential but I am not sure what it is. Anyone knows or knows of a site...let me know..thanks! __________________ -1968 Chevy SWB = Frame Off/383/Muncie Car 4 speed -1968 Chevy SWB = numbers matching 307/Truck 4 speed. -1966 Chevy II = 2 door No Post/130,000 Orig miles/230 6cyl/powerglide/Vintage AC -1972 Chevy Nova = 2 door/412 Small Block -1927 Ford Roadster = Homebuilt/widened 8"/350/ Custom Everything.

05-06-2002, 10:46 PM	#4
fast_dev Registered User Join Date: Dec 2000 Location: Ringtown,PA Posts: 555	must be 6 inches from back of tranny, needed if you go 13.99 or quicker on slicks or 13.00 or quicker on street tires. my local track didn't tell me that about the street tires, they assumed i was putting slicks on after tech inspection, but its not a bad idea to have one anyway. Devin __________________ 68 chevy 406 small block, budget drag racer, new best e.t 11.91 @112 67 nova numbers matching 327 4 speed 13.6 @ 102mph 70 longhorn c-30 402/4 speed 70 c-10 swb 402, muncie 4 speed 94 s-10 350/th350 3:73 posi 71 c-20 402/th400 towrig for racetruck. 72 4wd lifted on 35's 72 350/3 speed winter beater

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05-06-2002, 10:15 PM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Witha 2 pce shaft, I have no idea. With a one pce shaft, 6 inches from the Tranny. It don't much matter id it comes off in the back. They are worried about doing a pole volt thing at 1/2 track. ------------------ '69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it. FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite. If you need a pic posted, E-mail me at longhornmail@yahoo.com My name is Andy...not Randy...I'm in Ohio...Not Illinois...close enough? Columbus Ohio

05-06-2002, 10:20 PM	#3
Fast68Chevy Account Suspended Join Date: May 2000 Location: IL Posts: 0	i would think same distance from front of the rear shaft where it slides onto the end of the front shaft, on some 4 speed models that is, i think there is a factory loop on the 81 cutlass, was gonna rob it off the 79 de ville but forgot to before the roll back hauled it off.. i want ot instlal on under front of rear half under the 71, good luck



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