datsunfreak Posted March 31, 2023 Author Report Share Posted March 31, 2023 26 minutes ago, shlammed said: I find that a lot of people suggest wheel diameter size for wheel face clearance of a caliper. Looks like you lucked out that way with this combo! It was definitely luck. The way these wheels are built, the spokes are really far away from the wheel mounting face. Downside is, it makes them look like a wimpier offset than they really are, but it means TONS of caliper clearance. Between the caliper and the wheel's barrel, it looks like I have at least 1/2" clearance all around. I have not checked the face side yet (need a stunt hub for that), but when I dropped the rotor/caliper in you can tell the rotor is laying flat against the wheel mounting face. So the caliper is either not touching the spokes, or is only barely touching. Meaning worst case I will need a 5mm spacer behind the wheel. I am very excited about this. 😁 1 Quote Link to comment
Stoffregen Motorsports Posted March 31, 2023 Report Share Posted March 31, 2023 32 minutes ago, shlammed said: I find that a lot of people suggest wheel diameter size for wheel face clearance of a caliper. Looks like you lucked out that way with this combo! Yes, calipers and wheels spokes are often the issue. I ordered a custom set of wheels once and the manufacturer "forgot" to cut them for caliper clearance. I had them send me a diagram of the clearance cut from which I made a go/no go gauge, then cut them in the lathe myself. I also got from them a letter stating that all warranties and liabilities were in place, even though I did the machining. 1 Quote Link to comment
datsunfreak Posted March 31, 2023 Author Report Share Posted March 31, 2023 2 hours ago, Stoffregen Motorsports said: I also got from them a letter stating that all warranties and liabilities were in place, even though I did the machining. That was nice 👍 1 Quote Link to comment
datsunfreak Posted April 10, 2023 Author Report Share Posted April 10, 2023 Looks like I need maybe a 5mm spacer for "comfort". Caliper is into the spokes about 1-2mm. 1 Quote Link to comment
datsunfreak Posted September 29, 2023 Author Report Share Posted September 29, 2023 (edited) A friend of mine offered to sell me his seats since he was changing them out for something new, so my current Recaros will probably end up in the Dajiban. These new ones are the Sparco SPX. I thought since I will be running a suede Sparco wheel, and Sparco 6pt harnesses, why not get some seats to "match"? 😁 And yes, they are made of real carbon fiber... 🤘 I know this is dumb at this juncture, but the deal was WAY too good to pass up. 👌 Edited September 29, 2023 by datsunfreak 2 Quote Link to comment
datsunfreak Posted February 29 Author Report Share Posted February 29 (edited) Haven't gotten any serious work done yet, but I think I will soon. Did pick up another piece of the puzzle today... It is a manual steering rack from a 2010 Cobalt. This is what we used on Tim's 1200 project as the width between the inner tie rods is the same as the 240Z rack, so geometry stays within spec. A few nice benefits are it's aluminum (fair bit lighter than the stock steel rack), and it has a slightly quicker ratio. The ratio of the 240Z rack is 17.8:1 and the Cobalt is 16.6:1. It also has more turns lock-to-lock (3.6 versus 2.7), so this should mean there's potential for a lot more more steering angle. 👍 Edited March 7 by datsunfreak 1 Quote Link to comment
datsunfreak Posted February 29 Author Report Share Posted February 29 12 minutes ago, datsunfreak said: it has a slightly quicker ratio. The ratio of the 240Z rack is 17.8:1 and the Cobalt is 16.6:1. Also worth noting, the JDM 240Z steering rack is supposedly 15.5:1 ratio, so I don't think I'm going too far in quickening it a bit. Conventional wisdom is that since the S30 was not going to have power steering, they used a slower rack in USDM cars to make steering effort feel lighter, like the car had assisted steering. Gotta love the Japanese. Always dumbing stuff down for us fat, lazy Americans... 😋 1 Quote Link to comment
shlammed Posted March 4 Report Share Posted March 4 what is the width of the spacing of the inner joint on the cobalt rack? Quote Link to comment
datsunfreak Posted March 6 Author Report Share Posted March 6 (edited) On 3/4/2024 at 9:19 AM, shlammed said: what is the width of the spacing of the inner joint on the cobalt rack? I don't recall the exact numbers, but I know it is at most 3-4mm wider than the stock rack. Which was close enough for my needs. This site claims 610mm for the 240Z, so I would say 612-615mm (roughly 24.0-24.2")? The faster ratio, and the design of the inner tie rod, on the Cobalt rack makes for more turns lock-to-lock. Edited March 7 by datsunfreak Quote Link to comment
datsunfreak Posted March 15 Author Report Share Posted March 15 On 3/4/2024 at 9:19 AM, shlammed said: what is the width of the spacing of the inner joint on the cobalt rack? I am curious what made you ask? Considering it for a 510? Quote Link to comment
datzenmike Posted March 15 Report Share Posted March 15 It may have more turns lock to lock but the hubs probably have stops that won't let you use all of it. Quote Link to comment
datsunfreak Posted March 15 Author Report Share Posted March 15 (edited) 2 hours ago, datzenmike said: It may have more turns lock to lock but the hubs probably have stops that won't let you use all of it. 240Zs do not have those "stop bolts" you see on most Datsuns. You typically only see those on cars with recirculating ball steering boxes, not rack and pinions. Assuming that's what you meant. If not, maybe? We shall see... 😁 What I did find odd is that FWD cars are notorious for having a crappier turning circle than their RWD counterparts, owing to limitations on how far you can rotate the CV joints "out of alignment". So you'd think the 240Z would have more steering angle, but it doesn't due to (mostly) limitations in the rack itself. Edited March 15 by datsunfreak Quote Link to comment
iceman510 Posted March 15 Report Share Posted March 15 Another FWD limitation comes from the overall width of the transverse FWD engine/trans combo dimensions. At my former job we had the same vehicle with different turning circles between AT and MT versions due to the much larger packaging space required for the AT box. Thus different steering racks too. Talk about build complexity. 1 Quote Link to comment
datsunfreak Posted March 15 Author Report Share Posted March 15 After thinking about this way too mcuh, I'm not 100% sure if steering angle will increase or not. I only know two things. The quicker ratio will be better (IMO), and I can measure the actual difference in angle change once I fab the rack mount. Even if there is no appreciable change in maximum steering angle, this is the rack I am using, so fuck it. 😁 Quote Link to comment
shlammed Posted March 15 Report Share Posted March 15 8 hours ago, datsunfreak said: I am curious what made you ask? Considering it for a 510? Im considering making something like jbc offered. cobalt racks are a lot more available. Quote Link to comment
datsunfreak Posted March 18 Author Report Share Posted March 18 On 3/15/2024 at 4:11 PM, shlammed said: cobalt racks are a lot more available. Indeed. You can even buy them new for a nominal sum. 👍 Quote Link to comment
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.