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mekilljoydammit  
#21 Posted : Wednesday, August 16, 2017 1:03:47 AM(UTC)
mekilljoydammit

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Just a quick post... tinkering with making a semi-accurate-ish body in Solidworks so I can figure out if the chassis is poking through anywhere and start figuring out cooler placement, stuff like that. Cooler stuff is I'm working on centerlock hubs/uprights because I'm crazy. May just stick with 5x5; there's wide-5 in the picture but it compromises the geometry too much.

I'm half wondering if I should start a new thread for that. Enh, later maybe.

*edit*

UserPostedImage

... and then I figured out what I was doing wrong with surfacing. Hey, it was never anything I had to do in Solidworks before. And yeah the main hoop is poking through a little, so may either tweak that or measure an actual car.

Edited by user Wednesday, August 16, 2017 3:05:12 AM(UTC)  | Reason: Not specified

mekilljoydammit  
#22 Posted : Thursday, August 17, 2017 5:41:52 AM(UTC)
mekilljoydammit

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A bit more progress... think I've got things mostly fleshed out so probably time to get back to mechanicals, with an extra dose of "tweak the chassis around a bit".

And yeah, I don't like some of those contours around the rear wheels; probably going to export the bodywork to something other than Solidworks and tweak some of that at some point. In the mean time, close enough to work with.

The thought occurs suddenly... I'm sort of copying the late IMSA 1st gen RX-7s (with tweaks to be SCCA legal around the rear end) but I wonder how much room for optimization there is. I wonder what AMB charges. (probably more than I should afford)
mekilljoydammit  
#23 Posted : Tuesday, August 29, 2017 8:15:45 PM(UTC)
mekilljoydammit

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New (to me) parts time! OK, so, to do a from scratch suspension design you need to define that fits in the space you have. Wide 5 spindles as I originally mocked things up took too much stack height to have truly good geometry, and I'm a loon who loves a challenge so I started searching for stuff I could get that I could model. I want to thank the guys at Roadraceparts.com for working with me and selling me these used bits so I can measure them up; it's an incredible help. So that said, on to pics!

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So that's a BBS E55 series wheel center setup for centerlock, and a used centerlock spindle from I'm not sure what honestly. Well, all of this is Trans Am stuff - see part of my intent is to not be stuck with some sort of orphan wheels, so I want to make my stuff such that it bolts to off-the-shelf wheels and uses off-the-shelf centerlock nuts.

UserPostedImage

Beefy sucker; the bearing races on the left are something like 2" but the whole thing is hollowed out pretty extensively. It's not even just a straight bore either, the part that bulges out to locate the wheel is a larger ID than the part that the bearing races are on. I need to put some thought into how they did that.

UserPostedImage

Side view of the wheel center... one of the older style where the rim halves bolt on to the outside of the wheel center. The newer ones are setup for bunch more caliper clearance but this lets me confirm all of the machining surfaces necessary to bolt it to the spindle.

UserPostedImage

Rear (or inside, whatever) view of the wheel center; note 12 holes for the drive pins. Same wheel center works with spindles with either 4 or 6 drive pins.

Next up, I start pulling dimensions and doing modeling!
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