Bfg Posted February 13 Report Share Posted February 13 On 2/8/2024 at 12:21 PM, dave bailey said: Hi TRier. That's an interesting solution to the problem. Looks effective and makes you wonder why Triumph didn't do something similar when they designed the bridge! Hi Dave McD. I've actually done exactly what has been done to your CTM chassis, and might leave it at that,(although I'm tempted to do something similar to TRier's.) I see that you have joined the front and rear bridge in the same way as you did on the one you sold me. Having finished my cogitating I've, cooked up a scheme to reinforce the chassis a bit more, I'll put some pictures on when it's done. Dave. If TRier's deep sided cup remains, I guess it'll mean the springs won't come out easily ..when the semi-trailing arm is in place ? Whereas triangular gusset plates down either side of the spring don't effect its fitting or removal. Swinging the arm lower is prevented by the half-shafts coming down against the chassis, and the danger of their splines being pulled out too far. Pete Quote Link to post Share on other sites
Bfg Posted February 13 Report Share Posted February 13 On 2/7/2024 at 5:27 PM, TRier said: I fabricated a new chassis Is that allowed nowadays ? I only ask because I'm no longer up to date with vehicle registrations. Pete Quote Link to post Share on other sites
TRier Posted February 14 Report Share Posted February 14 (edited) 15 hours ago, Bfg said: If TRier's deep sided cup remains, I guess it'll mean the springs won't come out easily ..when the semi-trailing arm is in place ? Whereas triangular gusset plates down either side of the spring don't effect its fitting or removal. Swinging the arm lower is prevented by the half-shafts coming down against the chassis, and the danger of their splines being pulled out too far. Pete Hi Pete, as I said I haven't tried the thing in anger yet but I would think with a spring compressor the springs will come out easily enough, but thats a speculation, I dont know yet. Personally I dont like the triangular gusset solution, I think it looks a bit ugly. In terms of allowed, well its not disallowed where I am certainly from a regulatory perspective. There's an interesting chat in there on that subject but this probably isnt the post for it. Niall Edited February 14 by TRier Quote Link to post Share on other sites
Bfg Posted February 14 Report Share Posted February 14 I think you're right Niall, with spring compressor getting the springs in and out shouldn't be a problem, and they only very rarely need to be removed anyway. I hadn't noted you were in Ireland, and I know nothing about your country's vehicle regulations. I used to professionally built and sell replacement chassis for A-series Citroens ..many years ago, but as I say I'm out of touch with current UK or EEC regulations. I'll look forward to your reporting on test drives Pete. Quote Link to post Share on other sites
dave bailey Posted March 2 Author Report Share Posted March 2 Just thought I would put some pictures up showing what I eventually decided to do with my chassis. Finally I'm going to move on! Dave. Quote Link to post Share on other sites
RogerH Posted March 2 Report Share Posted March 2 It will be interesting to see what effect they have. Roger Quote Link to post Share on other sites
Bfg Posted March 2 Report Share Posted March 2 Looks really good David. I'm supposing you followed CTM's example of welded doubling plates for the rear springs ? Pete Quote Link to post Share on other sites
BlueTR3A-5EKT Posted March 2 Report Share Posted March 2 (edited) On 2/14/2024 at 9:42 AM, Bfg said: I think you're right Niall, with spring compressor getting the springs in and out shouldn't be a problem, and they only very rarely need to be removed anyway. I hadn't noted you were in Ireland, and I know nothing about your country's vehicle regulations. I used to professionally built and sell replacement chassis for A-series Citroens ..many years ago, but as I say I'm out of touch with current UK or EEC regulations. I'll look forward to your reporting on test drives Pete. Spring compressors…..Like this with cable ties Have now removed this photo as it is Not a safe way to do it ! Edited March 10 by BlueTR3A-5EKT Quote Link to post Share on other sites
Bfg Posted March 2 Report Share Posted March 2 ^ Fascinating Peter .. I'm sure that photograph could be assigned a profound meaning and be admired in the finest art gallery. . Quote Link to post Share on other sites
PodOne Posted March 2 Report Share Posted March 2 Definitely a work of art blended with science. Quote Link to post Share on other sites
Dave McDonald Posted March 2 Report Share Posted March 2 2 hours ago, PodOne said: Definitely a work of art blended with science. Worthy of Jackson Pollock. Dave McD Quote Link to post Share on other sites
Malbaby Posted March 2 Report Share Posted March 2 Dave...have you thought about a support brace/braces from the top of the front diff mount down to the T shirt area. Quote Link to post Share on other sites
RogerH Posted March 3 Report Share Posted March 3 11 hours ago, Malbaby said: Dave...have you thought about a support brace/braces from the top of the front diff mount down to the T shirt area. ...........indeed, the 4/4A had a horse shoe shaped extension in a bid to stiffen things. Do not know why it was removed for the 5/6 Roger Quote Link to post Share on other sites
harrytr5 Posted March 3 Report Share Posted March 3 22 hours ago, BlueTR3A-5EKT said: Spring compressors…..Like this? Must have taken you ages to set that up for a pic. 1/2" stud down the middle with suitable flat bars and bish bosh sorted! Quote Link to post Share on other sites
dave bailey Posted March 3 Author Report Share Posted March 3 Yes Pete, I've double plated the spring support bracket. I also don't know why they did away with the 'horseshoe' like strengthener as fitted on the TR4A, cost cutting probably. If I was rebuilding this car for racing, then I might well have considered further bracing for the forward diff turret, Anyway that's it now, I've had enough of chassis welding! and need to move on - lots to do! Thanks for your inputs. Dave. Quote Link to post Share on other sites
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