Offset trailling arm modifications
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Intermediate
Joined: Dec 2003
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From: Houston TX
Offset trailling arm modifications
What type of modifications are needed with this installation (half shafts - length and dia., brake lines & sway bar), also what upgrades are needed that will alow the rear end to support 500+ rwhp -It's a 69 vert, M21, 3.36/1 ratio
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From: Waterloo ontario Canada
Originally Posted by 7of69
What type of modifications are needed with this installation (half shafts - length and dia., brake lines & sway bar), also what upgrades are needed that will alow the rear end to support 500+ rwhp -It's a 69 vert, M21, 3.36/1 ratio
Melting Slicks
Joined: Jan 2006
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From: North NJ
If you want offset TA's go with the double offset TA's from VanSteel. They're the same as the regular offset but the rear leafspring mount is an inch towards the diff. on each side, this allows you to run a shorter spring which gives you more clearance b/w the spring and your rim/tire. (the wider the tire the more this should concern you) Do a search and you'll hear about members having their leaf spring hit their tire resulting in blown tires and suspension damage. You will have to have your leaf spring holes modified but IMO its well worth it. Check it out.
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From: Clearwater FL
Originally Posted by redc3
how and where do you modify the spring?
Melting Slicks
Joined: Dec 2005
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Originally Posted by Van Steel
You can cut steel springs or you can order shortened fiberglass springs from us. No price increase for that either.
Last edited by shafrs3; Apr 11, 2006 at 09:17 AM.
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Melting Slicks
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From: pr, frederick md.
Originally Posted by Van Steel
You can cut steel springs or you can order shortened fiberglass springs from us. No price increase for that either.
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Joined: Nov 2000
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From: Waterloo ontario Canada
Originally Posted by shafrs3
What's your view on running shorter springs and not relocating the spring bolt holes on the trailing arm inboard?
When you first install the spring with the wheels hanging down it looks weird, the bolts really tip in but once the weight in on the car and the spring flatens out is very hardly noticable. The new shorter spring is 1 inch shorter per side so this leaves a slight twist in the mounting bolts.
The next time the trailing arms were out I offset the mount to comprensate for this but I did run the crooked mounting bolts for years.
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From: Clearwater FL
Originally Posted by shafrs3
What's your view on running shorter springs and not relocating the spring bolt holes on the trailing arm inboard?
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From: Clearwater FL
Originally Posted by redc3
whats the ballpark, if i wanted the modified spring and the offsets with bearings installed?
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From: Houston TX
I plan to add ZL1 flares with a min. tire width of 335 in the rear. The car has a street and saloum suspension package from Vette Brakes that I installed 12 years ago. The fiberglass spring has ruined two tires (255/60/15), will this still be a problem with an 18X10 rim? I want to build this vette from one that I have seen on this forum called Killer or Killer Vette, I think the owners name is Chris McDonald.
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From: Clearwater FL
Originally Posted by 7of69
I plan to add ZL1 flares with a min. tire width of 335 in the rear. The car has a street and saloum suspension package from Vette Brakes that I installed 12 years ago. The fiberglass spring has ruined two tires (255/60/15), will this still be a problem with an 18X10 rim? I want to build this vette from one that I have seen on this forum called Killer or Killer Vette, I think the owners name is Chris McDonald.
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From: Waterloo ontario Canada
Originally Posted by Van Steel
I think if you cut a 1/2" or 3/4" off each end your fine with standard arms or standard offsets. If you go 1" or more, we recommend double offsets. Some have gone 1" shorter on the spring an have had no problems. I would run doubles in this case just for piece of mind.
Drilling a leaf spring is not that hard, lots of oil, slow speed and a sharp drill bit.
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St. Jude Donor '07
Originally Posted by norvalwilhelm
How do you cut 1/2 or 3/4 inch off the spring at each end? YOu run into the existing hole? If you cut just past the one hole and then redrill that is about the longest you can leave the spring and yet remove the hole.
Drilling a leaf spring is not that hard, lots of oil, slow speed and a sharp drill bit.
Drilling a leaf spring is not that hard, lots of oil, slow speed and a sharp drill bit.
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From: Clearwater FL
Originally Posted by norvalwilhelm
How do you cut 1/2 or 3/4 inch off the spring at each end? YOu run into the existing hole? If you cut just past the one hole and then redrill that is about the longest you can leave the spring and yet remove the hole.
Drilling a leaf spring is not that hard, lots of oil, slow speed and a sharp drill bit.
Drilling a leaf spring is not that hard, lots of oil, slow speed and a sharp drill bit.
Sorry I meant, getting a fiberlass spring cut shorter.