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10-11-2002, 11:35 AM
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#1 |
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Before and After
Join Date: Feb 2000
Location: Leduc, Alberta CANADA
Posts: 632
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Cutting Coils
How much of the coils wouold I need to cut off if I wanted to lower my C20 by 3 - 4" in the front, and 4 - 6" in the back?
I could also use blocks for a partial lowering in the back. All of these modifications would be done professionaly, and re tempered. I would like to try to modify my origional parts rather than buying new. 
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Not Grandpa's C-20 anymore... 383 Stroker 425HP, 485Ft/Lbs Lowered 3.5" Front / 5" Rear 66,000 miles. Alberta, CANADA |
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10-11-2002, 12:19 PM
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#2 |
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Account Suspended
Join Date: Mar 2001
Location: Virginia Beach, Va. U.S.A.
Posts: 15,320
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You can't cut the back coils, they are "pigtailed" at both ends. For the front coils, rule of thumb is 1/4 coil for each inch. You don't want to cut more than 3/4 coil!!! I recommend doing it right and using dropped spindles and lowering springs.
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10-11-2002, 05:46 PM
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#3 |
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Registered User
Join Date: Feb 2000
Location: Brandon, SD, USA
Posts: 1,292
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i cut 1 coil exactly off the bottom of the front springs and got exactly a 2.5 inch drop. but when i took the springs out the bottom two coils where touching and the 2nd and 3rd werent, so my guess is if one is 2.5 then two would be a little more than 5, but thats just a guess. good luck, Ben
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Brandon, SD 69 GMC 1/2 ton 2wd wide long bed with wood 3 on the tree 350 engine 4 bolt main rv cam AIM = Alphray04 |
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10-11-2002, 06:05 PM
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#4 |
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Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
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I have done this , but also dont reccomend it! i cut 1 full ring off a NEW set of coils , & got roughly a 3 " drop. Along with that mod were a set of custom made shock brackets, to keep the stock lenght shocks. All in all, the longhorn doesnt ride or handle too bad,but i do get a little "bump steer" over the really rough spots in these midwest roads( this is due to the tierods not being parallel). also the angles are pretty severe on the balljoints( I check em 2-3 times a season for wear). When I go in to straighten it up , i will run a set of 2 1/2" dropped spindles,with a 1 or 1 1/2" drop spring........& will replace all 4 low milage balljoints just for peace of mind! good luck.....crazy longhorn
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10-12-2002, 01:16 AM
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#5 |
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Registered User
Join Date: Aug 2001
Location: Qualicum Beach, B.C>, Canada
Posts: 117
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Pocket drops
I'm planning a drop of a couple of inches on my Jimmy but rather than cutting the springs, I was going to cut the bottom of the spring pockets out of a spare set of control arms, weld in 2 inch pipe extensions to drop the pockets and then weld the pocket bottoms back on. That way you keep the full spring to maintain ride and, except for shorter shocks, everything else stays as it was.
For the backs I was going with 2.5" solid blocks between frame and trailing arms. Any comments on this approach? |
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