Go Back   The Supercar Registry > General Discussion > Day 2 stuff-modified cars


Reply
 
Thread Tools Display Modes
  #1  
Old 03-15-2017, 04:48 AM
cwc's Avatar
cwc cwc is offline
Senior Member
 
Join Date: Sep 2009
Location: leitchfield,ky
Posts: 317
Thanks: 29
Thanked 75 Times in 30 Posts
Default Which traction bars to use

I'm real close to getting my 69 l78 nova on the road. I'm curious as to which set of traction bars you guys would suggest. I'm not sure as to what time frame either set was built.i really dig the set with the tails,but like the fact that the black ones use 2 u-bolts plus the j-bolt.
Attached Images
 
__________________
1967 SS427 4 speed triple black survivor-sold to a good home
1969 nova SS396 L78 4 speed triple black survivor
1970 camaro SS350 citrus green,Dad bought it new!
1968 chevelle ss396 L34 M21 KK rear all born with
1972 formula 400 M22
Reply With Quote
Attachments - The Supercar Registry image.jpg image.jpg
O Garage vBulletin Plugins by Drive Thru Online, Inc.
Click here to view all the pictures posted in this thread...
  #2  
Old 03-15-2017, 12:27 PM
67 Nova Boy's Avatar
67 Nova Boy 67 Nova Boy is offline
Yenko Contributing Member
 
Join Date: Dec 2009
Location: Lansdale, Pa.
Posts: 3,342
Thanks: 18,214
Thanked 355 Times in 257 Posts
Default

Which ones are long enough to reach your spring eye to actually work? Most come up short and the front snubber hits before the spring eye.

Measure from the center of the rear plate {If there, use the center locating hole for the pad} to the center of the longest hole where the front snubber bolts into, then measure from the center of the axle tube to the front spring eye and see what you need to put them in the right place. Mine is about 28" or so on a second gen Nova.

Dave
67 Nova Boy

http://www.how-to-build-hotrods.com/traction-bars.html

Last edited by 67 Nova Boy; 03-15-2017 at 09:21 PM.
Reply With Quote
  #3  
Old 03-15-2017, 02:46 PM
vince's Avatar
vince vince is offline
Yenko Contributing Member
 
Join Date: Feb 2003
Location: long island ny
Posts: 150
Thanks: 84
Thanked 37 Times in 16 Posts
Default

what a great link alot of useful info there. thanks for that dave.
__________________

Reply With Quote
  #4  
Old 03-16-2017, 03:43 AM
cwc's Avatar
cwc cwc is offline
Senior Member
 
Join Date: Sep 2009
Location: leitchfield,ky
Posts: 317
Thanks: 29
Thanked 75 Times in 30 Posts
Default

I'm pretty sure both sets are gonna come up short. The yellow ones are different lengths.they are the same ones on Grady's copo. He has the long one on the passenger side,but when they were on his l78 nova the short one was on passenger side.what is correct?
__________________
1967 SS427 4 speed triple black survivor-sold to a good home
1969 nova SS396 L78 4 speed triple black survivor
1970 camaro SS350 citrus green,Dad bought it new!
1968 chevelle ss396 L34 M21 KK rear all born with
1972 formula 400 M22
Reply With Quote
  #5  
Old 03-16-2017, 08:52 AM
ZLP955's Avatar
ZLP955 ZLP955 is offline
Yenko Contributing Member
 
Join Date: Dec 2012
Location: Australia
Posts: 1,180
Thanks: 751
Thanked 253 Times in 182 Posts
Default

An old-school hot rodder once told me that bars with the rear extension help prevent reverse spring wrap under hard braking, but (if that's correct) not sure if the effects on a street-driven car would be all that noticeable.
__________________
Tim in NSW, Australia
1969 Van Nuys 04A Z/28 from Clippinger Chevrolet.
Cortez Silver with dark blue interior.
Ran at Lions Dragstrip and Pomona Raceway, with paint by Bob Kovacs of Fresno.
Reply With Quote
  #6  
Old 03-20-2017, 10:53 PM
Jetstuff Jetstuff is offline
Junior Member
 
Join Date: Oct 2016
Location: Philadelphia,PA
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
Default

I'd run the black, square tube "J' bolt bars... Paint em yellow and buy the repro decals. I looked a long time to find a set of square tube bars for my Mustang. If you're really gonna drive the car hard or race it, the J bolts take a lot of load off the stock U (or T) bolts. It's not too hard to lengthen the bars to get the bumper under the eye, and with a little work, you can make them appear unmodified ...

"An old-school hot rodder once told me that bars with the rear extension help prevent reverse spring wrap under hard braking,"

I think the rear clamp bolt can be used to stiffen the rear half of the spring pack or preload the spring. The front "u" bolt keeps the bar from hitting the street under hard braking (REALLY bad if it happens.....)

Last edited by Jetstuff; 03-20-2017 at 10:59 PM.
Reply With Quote
  #7  
Old 03-21-2017, 10:26 AM
bbbentley's Avatar
bbbentley bbbentley is offline
Senior Member
 
Join Date: Jul 2012
Location: Close to the old Norwood plant in Ohio
Posts: 2,264
Thanks: 452
Thanked 490 Times in 237 Posts
Default

Regardless of which bar you run, and advice given to extend the snubber under the spring eye, 1st , that front clamp or squared off U bolt serves to keep the bars from diving too much and risking hitting the pavement. So, the tails may look cooler, but may not serve a purpose or be necessary, IMO. 2nd, you may not want to drastically modify either set of bars with extensions for the spring eye. One way to preserve unmodified bars are to Find tubing that slips inside the bars tubing , snug. Use the snubber hole as the means to secure the bar. One way would be to weld a nut (after drilling a hole) on the inside top of the slide in bar. Run a bolt down snubber hole through nut. If there is some rattling because of a little slop in the two bars, inner & outer, wrap some electrical tape around the inner bar to prevent noise. This way you have not permanently altered or welded on your vintage, unmolested set. You will also most likely need to add a vertical spacer to the end of the bar for snubber to get close to the spring eye. These thoughts may be obvious to most on the site, but I felt this was good practical approach that others may benefit?
__________________

69 SS/RS 396 M20 X22 Nor 12B,72B,712 bought 1979
FULL OWNER HISTORY
69 Dick Harrell tribute Day II 427 M20 4.10 X11 76 orig pnt, 711
67 Super Stock 302 Camaro re-creation

Last edited by bbbentley; 03-21-2017 at 10:31 AM.
Reply With Quote
  #8  
Old 03-21-2017, 11:11 AM
WILMASBOYL78's Avatar
WILMASBOYL78 WILMASBOYL78 is offline
Yenko Contributing Member
 
Join Date: Jul 2003
Location: new york
Posts: 8,171
Thanks: 1
Thanked 1,597 Times in 491 Posts
Post traction bars

Don't rule out a set of "Harrell" style spring clamps...I know these worked pretty well and don't have the fitting issues the bars have.

-wilma
__________________
02 Berger 380hp #95
Lots of L78 Novas
Join National Nostalgic Nova!
70 Orange Cooler
69 Camaro
Reply With Quote
  #9  
Old 03-21-2017, 04:10 PM
69 Post Sedan's Avatar
69 Post Sedan 69 Post Sedan is offline
Yenko Contributing Member
 
Join Date: Dec 2007
Location: Janesville, WI
Posts: 3,549
Thanks: 858
Thanked 418 Times in 157 Posts
Default

The top of the snubber should be about 1/4" away from the spring....you don't want it too far away as the traction bar won't work like it should and you don't want it pushing up against the spring either.

A friend of mine told me years ago to not to use traction bars but to just put clamps on the springs and that will also prevent wheel hop but I'm not sure where they go or exactly how it's done.

Kurt
__________________

1969 SS396 Post Sedan Delivered to Van-T Topeka KS
MCACN Day2 Concourse Gold Award

1968 Schwinn Orange Krate Original Paint
1970 Schwinn 3-Speed Deluxe Original Paint
Reply With Quote
  #10  
Old 03-22-2017, 12:17 AM
cwc's Avatar
cwc cwc is offline
Senior Member
 
Join Date: Sep 2009
Location: leitchfield,ky
Posts: 317
Thanks: 29
Thanked 75 Times in 30 Posts
Default Traction bars

I ended up using the black bars without the tails,they were given to me by a good friend just for this car,so I thought it rightful to use them.another good friend NugeUSA1 whom was needing a set of bars for his 68 L78 camaro and has literally gave me a lot of original and nos parts for nova now has the yellow ones
Attached Images
 
__________________
1967 SS427 4 speed triple black survivor-sold to a good home
1969 nova SS396 L78 4 speed triple black survivor
1970 camaro SS350 citrus green,Dad bought it new!
1968 chevelle ss396 L34 M21 KK rear all born with
1972 formula 400 M22
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 09:49 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.