 Notching the trailing arm for tire clearance? |
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| Mueller |
 Jan 20 2017, 12:48 PM
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#1
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914 Freak!  Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
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I seem to remember a thread in which someone notched their trailing arm for more inside tire clearance.
Obviously it would be an ideal time to add the trailing arm reinforcing kit to the other side. Attached image(s) 
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| tygaboy |
Jan 20 2017, 01:28 PM
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#2
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914 Guru Group: Members Posts: 5,292 Joined: 6-October 15 From: Petaluma, CA Member No.: 19,241 Region Association: Northern California
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I had mine modded by Tangerine - cut in half, plated and gusset added - so if it we're me, I'd contact Chris Foley and get his opinion. I bet he's thought through all sorts of possible mods and could weigh in on the what's and wherefores of something like what you're looking to do.
Attached thumbnail(s) 
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| mepstein |
Jan 20 2017, 02:17 PM
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#3
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914-6 GT in waiting Group: Members Posts: 19,271 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region
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I seem to remember the poster saying he would never do it again. too much work.
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| eeyore |
Jan 20 2017, 02:31 PM
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#4
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Senior Member Group: Members Posts: 889 Joined: 8-January 04 From: meridian, id Member No.: 1,533 Region Association: None |
Don't the tires make contact with the inner fender well before the trailing arm?
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| horizontally-opposed |
Jan 20 2017, 03:27 PM
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#5
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Advanced Member Group: Members Posts: 3,432 Joined: 12-May 04 From: San Francisco Member No.: 2,058 Region Association: None
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First place I ran out of room for 215/60R15s was at the trailing arm. There was a biiiiiiiit of space at the inner fender, but it was too close for my liking. But the brake line/trailing arm was the first problem. The obvious solution was to space the wheel out, but I don't want GT flares and am not ready to pull my fenders.
Thinking about all of the 914 that have been extensively modified over the last four decades—often at no small cost—I am surprised that no aftermarket vendor offers a trick, lightweight, and highly-adjustable blade-type trailing arm like those made for 911s. Seems ripe for the taking? Paging Elephant Racing, Tangerine Racing, PMB... |
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| 6freak |
Jan 20 2017, 03:50 PM
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#6
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MR.C Group: Members Posts: 4,740 Joined: 19-March 08 From: Tacoma WA Member No.: 8,829 Region Association: Pacific Northwest |
QUOTE(Mueller @ Jan 20 2017, 10:48 AM)  I seem to remember a thread in which someone notched their trailing arm for more inside tire clearance. Obviously it would be an ideal time to add the trailing arm reinforcing kit to the other side. why do you need bigger tires? and as far as boxing or stiffning trailing arms gos IMO its a huge waste of money and the trailing arm itself is the weak link in a crash ,you want it to bend otherwise ya tweek the chassis... but its your cheese and crackers so have fun with it (IMG:style_emoticons/default/smile.gif) |
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| NeunEinVier |
Jan 20 2017, 06:16 PM
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#7
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Member Group: Members Posts: 110 Joined: 24-December 15 From: In front of the smoke. Member No.: 19,488 Region Association: None |
That does look like a lot of careful fab work, and adding the gusset to regain some rigidity is key.
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| 914forme |
Jan 20 2017, 08:44 PM
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#8
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Times a wastin', get wrenchin'! Group: Members Posts: 3,896 Joined: 24-July 04 From: Dayton, Ohio Member No.: 2,388 Region Association: None
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Mine rub, and Chris told me to wack it with a BFH (IMG:style_emoticons/default/smash.gif) But mine has his kit on them. You could notch them, and weld in a section of cut tube. I had thought about doing that on mine. Also the kits really do little to nothing. Chris came up with the shortening of the box. Others weld in tubes.
What wheels are you trying to fit? Also you could move the carrier out moving the wheels away from the arms. Also accomplished by using a spacer. |
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| barefoot |
Jan 21 2017, 07:47 AM
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#9
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Senior Member Group: Members Posts: 1,273 Joined: 19-March 13 From: Charleston SC Member No.: 15,673 Region Association: South East States
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QUOTE(Mueller @ Jan 20 2017, 01:48 PM) I seem to remember a thread in which someone notched their trailing arm for more inside tire clearance. Obviously it would be an ideal time to add the trailing arm reinforcing kit to the other side. Any thru penetration welding of notched out plating will distort the A-arm by shrinking the welded side and altering the alignment of the axle bore to the pivot axis. Beware. |
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| andys |
Jan 21 2017, 10:56 AM
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#10
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Advanced Member Group: Members Posts: 2,165 Joined: 21-May 03 From: Valencia, CA Member No.: 721 Region Association: None
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QUOTE(barefoot @ Jan 21 2017, 05:47 AM) QUOTE(Mueller @ Jan 20 2017, 01:48 PM) I seem to remember a thread in which someone notched their trailing arm for more inside tire clearance. Obviously it would be an ideal time to add the trailing arm reinforcing kit to the other side. Any thru penetration welding of notched out plating will distort the A-arm by shrinking the welded side and altering the alignment of the axle bore to the pivot axis. Beware. I tend to agree, it will likely distort. Andys |
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