Nissan Skyline R32 GTR - Group.. A?

Nissan Skyline R32 GTR - Group.. A?

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Discussion

easy_

50 posts

26 months

Thursday 23rd June 2022
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Fabulous work as always

B'stard Child

28,324 posts

245 months

Thursday 23rd June 2022
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Excellent - I do admire your dedication to getting it "right"

trails

3,624 posts

148 months

Friday 24th June 2022
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Double speed Zombie and a cat.

Quality edit Alex biggrin

alexcrosse

Original Poster:

152 posts

143 months

Monday 27th June 2022
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Cheers guys!

Yeah I got bored of turning music off during filming bits. Kinda hoped there would be some secret message in some tracks, maybe I'll start reversing everything.

2ZZ Top

2,981 posts

138 months

Monday 27th June 2022
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You must be really chuffed to know it's going to be worth £440,000 + VAT when you're finished. biggrin

alexcrosse

Original Poster:

152 posts

143 months

Monday 27th June 2022
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hopefully I'll just about break even then!

alexcrosse

Original Poster:

152 posts

143 months

Wednesday 29th June 2022
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PH only update. Big day for the build yesterday, this is the definition of a personal project spiralling out of control.

I secured a day with all the components I need, mag uprights, tubular 3rd links, arms, hardware, hubs etc. Parts with complex surface geometry were scanned and others I measured with old school kit.



So a bit of a gap now, couple of weeks post processing scan data. Then it’ll be a months work or so for me to model from that.

The complexity was perhaps higher than I anticipated, despite having a parts list for these cars… but I’ve captured enough to keep me busy and bankrupt for the rest of the year.

2ZZ Top

2,981 posts

138 months

Wednesday 29th June 2022
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Oh, that's coolcoolcool

Is that what the CNC conversion plan for the new mill is all about, or is that too long-term for this batch? Or is the geometry too complex for the home shop and you'd save a fortune in broken end mills by subbing it out? biggrin

navmangt

57 posts

117 months

Wednesday 29th June 2022
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Will you make 3D printed uprights to test fitment of the 3D scans? What CAD software do you use btw?

Hugely inspiring btw, I've got zero fabrication skills but I'm itching to start a project any time I see your posts.

alexcrosse

Original Poster:

152 posts

143 months

Wednesday 29th June 2022
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2ZZ Top said:
Is that what the CNC conversion plan for the new mill is all about, or is that too long-term for this batch? Or is the geometry too complex for the home shop and you'd save a fortune in broken end mills by subbing it out? biggrin
The home Warco and future CNC plans are just for my own amusement, perhaps some little brackets & whatnot in the future. It wouldn't be up to these components. A company is going to produce these parts, they have a large HURCO 4 axis. Later in the year when things are getting cut I'll try and drop a gopro down there.

navmangt said:
Will you make 3D printed uprights to test fitment of the 3D scans? What CAD software do you use btw?

Hugely inspiring btw, I've got zero fabrication skills but I'm itching to start a project any time I see your posts.
Yeah the printer has been useful for checking some references already, but these scans I'll correlate with some specific hand measurements I took on the day with mics & bore mics. For lols I'm printing everything in half scale though, which will help to ensure compatibility between all the 'new' parts.

I tend to use whatever I can get my hands on for CAD... although I don't do it for work anymore, its historically been pro-E, solidworks or catia. The software in the photo is the scanners, and he has another package for post processing STL files which is more capable than previously listed packages for that specific job.

2ZZ Top

2,981 posts

138 months

Wednesday 29th June 2022
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There's a 3D printer PH thread in case you run into any tolerance issues. Bores tend to come out undersized without settings tweaks (due to the slicer gcode really being a bunch of tiny straight lines to approximate a circle). Bores usually need a bit of a nudge bigger, which can be done without scaling the whole part up and buggering other dimensions. Not an issue with half scale parts for proof of concept, but if you want 1:1 parts you might find bearings won't press in and that sort of nonsense. Probably a non-issue for your intended needs, but just in case, there are some knowledgeable folks here:

https://www.pistonheads.com/gassing/topic.asp?h=0&...

alexcrosse

Original Poster:

152 posts

143 months

Wednesday 29th June 2022
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Cheers, good info. I've noticed before than it's not exactly the most accurate machine, especially on larger parts.

Jon_Bmw

619 posts

201 months

Thursday 30th June 2022
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A great video and update with the 3D scanner. That looks like a decent bit of kit. Are the various sticker dots reference points for it?

If I wanted to scan the underneath of a car for example would I need those reference dots stuck on the underfloor. I'm interested in scanning exhaust pipes/resonators/mufflers and their pathway.

We have a manual CMM at work which is good, but it can be fairly time consuming and obviously can't measure the underbody.

alexcrosse

Original Poster:

152 posts

143 months

Friday 1st July 2022
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Jon_Bmw said:
A great video and update with the 3D scanner. That looks like a decent bit of kit. Are the various sticker dots reference points for it?

If I wanted to scan the underneath of a car for example would I need those reference dots stuck on the underfloor. I'm interested in scanning exhaust pipes/resonators/mufflers and their pathway.

We have a manual CMM at work which is good, but it can be fairly time consuming and obviously can't measure the underbody.
Cheers mate, yes I went through a few options. Difficulty was fitting the component availability around my own life. I could have taken them home for ~5 days and initially the plan was to CMM it, but it would have been a big stress to get it done in that time around family, as you say, CMM is time consuming. It also doesn't lend itself too well to complex surfaces.

This way I pay a man, and i get given post processed auto-surfaced models with reference planes and axes pulled out. Then I build my models inside these. A good middle ground to balance cost and time.

Yep - sticker dots give really clear reference points so the software can align all the other points. Originally I was going to get the whole floor scanned (and more actually), its more than capable. But I realised it was more of a 'nice to have' and chose to focus on the genuinely specific group A components. But it would be a perfect tech for your needs.



alexcrosse

Original Poster:

152 posts

143 months

Thursday 7th July 2022
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Scan data is starting to cascade down to me. First item in is the 3rd link. For those not familiar, the skyline has a sort of multi link setup, and this 3rd link run from the upper arm, attaching to the front upright via a kingpin.

On the standard cars, it’s made from pressed steel. But on the gpA it’s tubular setup to increase rigidity. The forces these have to deal with is quite extreme; even on the standard car I’ve squeezed poly bushes through the top braking into paddock at brands…

The scan data comprised of a wafty surface model, and then critically axes and centrelines for bolt holds and tubes. I then built a new solid model from this; all separate components as individual bodies so they can be sent off for CNC bending / laser cutting. The sheet metal add in makes easy work of flattening any bent patterns too.

Full model could then be built into a jig, all this is off to the laser cutters and will be the next thing I fabricate. I also need the tubes CNC bent with a roller capable of varying centre line radii. So if anyone knows anyone… also would like them laser profiled.



Edited by alexcrosse on Thursday 7th July 09:19

alexcrosse

Original Poster:

152 posts

143 months

Monday 25th July 2022
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Ok PHers. I may have got slightly distracted. M3 is gone, turns out I still find trackdays a bit boring and there’s no good roads around here.

I was going to have a few blissful months only owning one car, but then this came up and it’s yellow.


B'stard Child

28,324 posts

245 months

Monday 25th July 2022
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alexcrosse said:
Ok PHers. I may have got slightly distracted. M3 is gone, turns out I still find trackdays a bit boring and there’s no good roads around here.

I was going to have a few blissful months only owning one car, but then this came up and it’s yellow.

Well that's gonna cause a conflict biggrin

Penguinracer

1,593 posts

205 months

Tuesday 26th July 2022
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Don't start messing with the 944 - it's slippery slope...

Penguinracer

1,593 posts

205 months

Tuesday 26th July 2022
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Penguinracer

1,593 posts

205 months

Tuesday 26th July 2022
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