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Kage87Z
Member
Joined: 19 Jan 2004
Posts: 436
Location: 12 Second Club
1969 Chevrolet Camaro
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 Posted: Thu Sep 24, 2009 4:10 pm Post subject: HELP! Loop required for PIR? |
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I've been trying to get the 87 ready for several weeks now... and it's close.
BUT, I now understand that a loop is required (and makes good sense) for the front end of the driveshaft.
I don't have a loop. The "universal" ones available here locally don't look like they'll come close to getting the job done.
I'm open to suggestions as to how to get this done, in the best of all worlds, by Saturday afternoon... so I can get this installed and run it before the track closes for the year.
_________________
"Are you guys ready? Let's roll."
Todd Beamer - 9/11
Never Forget
My 69's story: http://myspace.com/69camaro454
My 87 Z/28's tale of woah... http://myspace.com/87Zcamaro383 |
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Dewey316
The Lama
Joined: 08 Jan 2004
Posts: 7295
Location: Bringing the tech
1990 Chevrolet Camaro RS
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| Posted: Thu Sep 24, 2009 4:28 pm Post subject: |
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Spohn tranny cross member with loop, or torque arm with loop.
PS: You can run once, and see what it runs. The loop is not required until a certain speed. |
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91camaro_rs
Member
Joined: 03 Dec 2008
Posts: 1712
Location: Fox Island, Wa
1991 Chevrolet Camaro RS
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| Posted: Thu Sep 24, 2009 4:34 pm Post subject: |
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if you need to make a cheap loop just get some steel pipe, take the drive shaft off on one side and slip it over it and weld it so whatever is there, thats how one of the guys i race with did it
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'91 Camaro RS 5.7 TPI- 700r4- 3.27 posi- headers- chambered exhaust- |
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Twilightoptics
Hardcore (12sec Club)
Joined: 13 Jan 2004
Posts: 9191
Location: Auburn , WA
1987 Chevrolet Camaro IROC-Z
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| Posted: Thu Sep 24, 2009 5:07 pm Post subject: |
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| Dewey316 wrote: | Spohn tranny cross member with loop, or torque arm with loop.
PS: You can run once, and see what it runs. The loop is not required until a certain speed. |
Loop is required with slicks.
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A redline a day keeps the carbon away! |
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Kage87Z
Member
Joined: 19 Jan 2004
Posts: 436
Location: 12 Second Club
1969 Chevrolet Camaro
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| Posted: Thu Sep 24, 2009 5:30 pm Post subject: |
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Yeah... I'd heard that slicks=must have loop regardless of speed.
Does anyone have a source for a loop that will work?
I don't have welding skilz or equipment, or maybe I'd take a run at fabricating one.
Any other siggestions or locations where I might be able to get a loop locally?
_________________
"Are you guys ready? Let's roll."
Todd Beamer - 9/11
Never Forget
My 69's story: http://myspace.com/69camaro454
My 87 Z/28's tale of woah... http://myspace.com/87Zcamaro383 |
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chevymad
Master B
Joined: 11 Jan 2004
Posts: 5476
1987 Pontiac Formula
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| Posted: Thu Sep 24, 2009 5:37 pm Post subject: |
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| Call Paul's shop. |
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QwkTrip
11sec Club
Joined: 17 Feb 2004
Posts: 3942
Location: Peoria, IL
1989 Pontiac Firebird
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| Posted: Thu Sep 24, 2009 5:38 pm Post subject: |
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| Driveshaft safety loop is $40 on Jegs website. |
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Schultzy89GTA
M.R.A. (11sec Club)
Joined: 08 Jan 2004
Posts: 4417
Location: Gresham, OR
1989 Pontiac GTA
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| Posted: Thu Sep 24, 2009 7:21 pm Post subject: |
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Are you still running a 700R4 Kelly?
-Schultzy
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Red Sled: 89 GTA, 383, TKO, N2O
12.73 @ 109.39, 1.793 60 \ 11.794 @ 121.16, 1.62 60 (old combo) |
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Twilightoptics
Hardcore (12sec Club)
Joined: 13 Jan 2004
Posts: 9191
Location: Auburn , WA
1987 Chevrolet Camaro IROC-Z
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| Posted: Thu Sep 24, 2009 7:21 pm Post subject: |
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Those cheap jegs ones work, but they really hack up the car.
Best bet is what John said, order up a Spohn Crossmember/Loop. Bolt in. No drilling. Nice stuff.
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A redline a day keeps the carbon away! |
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Schultzy89GTA
M.R.A. (11sec Club)
Joined: 08 Jan 2004
Posts: 4417
Location: Gresham, OR
1989 Pontiac GTA
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| Posted: Thu Sep 24, 2009 7:27 pm Post subject: |
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I happen to have one. It is red. It is good. It is not used with my TKO.
-Schultzy |
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DBL_TKE
Member
Joined: 28 Feb 2007
Posts: 1505
Location: Aloha, OR
1991 Chevrolet Camaro Z/28
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| Posted: Thu Sep 24, 2009 10:08 pm Post subject: |
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| Dewey316 wrote: | Spohn tranny cross member with loop, or torque arm with loop.
PS: You can run once, and see what it runs. The loop is not required until a certain speed. |
Not quite. It's not speed that dictates when the loop is required, it's ET. You need a driveshaft loop at 11.49 and quicker, or if you're running non street legal slicks. It also needs to be within 6" of the front U-joint.
Directly out of the NHRA rule book:
2.4 DRIVELINE
On any car in which the driver sits over or in back of the rearend center section, a suitable protective shield of .120-inch (3 mm) minimum thickness steel plate must be installed for those units with universal joints securely mounted to the rearend center section and the bellhousing adapter. Where possible, couplers are recommended in place of U-joints. For straight couplers, the minimum requirement is .063-inch (1.6 mm) aluminum which must contain an inspection cover for removal and inspection of the coupler, securely mounted to the rearend center section and the bellhousing adapter, or as noted in Class Requirements. In place of a crossmember, in the vicinity of the front universal joint, all cars in competition using open driveshafts, must have a retainer loop 360-degrees of enclosure, 1/4-inch (6.35 mm) minimum thickness and 2-inches (5.1 cm) wide, or 7/8-inch (22.2 mm) x .065-inch (1.65 mm) welded steel tubing, securely mounted and located within "6-inches" (15.2 cm) of the front universal joint f or support of the driveshaft in event of U-joint failure. Recommended the loop be round rather than oblong to minimize loading on loop. Open drivelines passing any part of the driver's body must be completely enclosed in 1/8-inch (3.2 mm) minimum thickness steel plate, securely mounted to the frame or frame structure.
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Richmond 3.73 posi| 36/24 sway bars | SLP LM2 | Koni's | Ground Control 800/200 | Y2K wheels | Dyno Don headers & Y-pipe | airfoil | BBK underdrive pulleys | Raised strut mounts | Extended ball joints | LCARB'S
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Kage87Z
Member
Joined: 19 Jan 2004
Posts: 436
Location: 12 Second Club
1969 Chevrolet Camaro
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| Posted: Thu Sep 24, 2009 10:28 pm Post subject: |
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| Schultzy89GTA wrote: | Are you still running a 700R4 Kelly?
-Schultzy |
Yowsa.
_________________
"Are you guys ready? Let's roll."
Todd Beamer - 9/11
Never Forget
My 69's story: http://myspace.com/69camaro454
My 87 Z/28's tale of woah... http://myspace.com/87Zcamaro383 |
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Kage87Z
Member
Joined: 19 Jan 2004
Posts: 436
Location: 12 Second Club
1969 Chevrolet Camaro
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| Posted: Thu Sep 24, 2009 10:30 pm Post subject: |
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| Schultzy89GTA wrote: |
I happen to have one. It is red. It is good. It is not used with my TKO.
-Schultzy |
Well, I'd like to take it off your hands... let me know what works for you.... and thanks, S.
_________________
"Are you guys ready? Let's roll."
Todd Beamer - 9/11
Never Forget
My 69's story: http://myspace.com/69camaro454
My 87 Z/28's tale of woah... http://myspace.com/87Zcamaro383 |
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Schultzy89GTA
M.R.A. (11sec Club)
Joined: 08 Jan 2004
Posts: 4417
Location: Gresham, OR
1989 Pontiac GTA
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| Posted: Sat Sep 26, 2009 11:54 am Post subject: |
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Thanks Kelly. Good to see you again and good luck at the track tonight.
-Schultzy |
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