What is the purpose of the inner step at 78mm, why does it not align to the inner diameter at 88mm? Thanks.
That is a great idea! I'll contact Mark and see if we can borrow it. I have already printed a test model so this would be a good start for a test fit.I have a spare strut tower top for testing this very purpose.
That is certainly a fair question. In my case, I simply picked up that part of the design from @Stevehose on post 112. So we should ask him. Absent other answers, I am guessing it was simply to leave a little bit more material around that top corner. But I would certainly ask my machinist if he can smooth it out to match the outer curve.What is the purpose of the inner step at 78mm, why does it not align to the inner diameter at 88mm? Thanks.
I think the inner step was recommended by the machinist for extra strength, sorry but I don't remember exactly.That is certainly a fair question. In my case, I simply picked up that part of the design from @Stevehose on post 112. So we should ask him. Absent other answers, I am guessing it was simply to leave a little bit more material around that top corner. But I would certainly ask my machinist if he can smooth it out to match the outer curve.
I've got a recently retired mechanical engineer friend in Seattle who's car savvy and has an Italian Graziano lathe. I'll hit him up and see if he's interested in making some of these. Should be an easy thing for him.Thanks @autokunst for the nudging and suggestion. Here is an updated drawing without that "78mm step".
View attachment 133448
LatheHow will you cut precisely 15mm from the top, evenly all the way around?
Cutting the top off of the support tower would require rather close measurement and slicing. The beauty of having that extra lip is that, even if the cut isn't uniformly 15mm from the top of the original, you could slide the reinforcement into the remaining tower and make adjustments to the cut to seat it where it needs to be before the final welding.How will you cut precisely 15mm from the top, evenly all the way around?
In the trunk?!Lathe
Yea, I get there is a small amount of fudge factor but it still has to be very even... Which led me to my question, of how exactly... Seems simple on the surface but to get it spot on may be a challenge.Cutting the top off of the support tower would require rather close measurement and slicing. The beauty of having that extra lip is that, even if the cut isn't uniformly 15mm from the top of the original, you could slide the reinforcement into the remaining tower and make adjustments to the cut to seat it where it needs to be before the final welding.
a 16"x 9" rim (which is what I have on my car) is actually 10" wide as a rim is measured across each lip and the outside of each lip makes up 1/2" either side so that equals 10". My question to others is........regarding the internally fitted reinforcement cap ....to weld the unit in is going to be difficult to access (barely 4" to get welding head inside tower).....also the top of the tower is cut off which in itself makes the tower weaker. Furthermore....why mess around custom building stuff when you can buy something off the shelf. By the look of it, if you have a rear brace that would still fit below an externally fitted reinforcing cap.More importantly, how did you get 10" wheels under your coupe? ! Any pictures?