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I won't. I don't have enough tires to get through a DE style weekend. I'll hopefully make Summit next year.
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Oct 17, 2017 17:48
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| # ? May 14, 2024 00:48 |
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Anyone in here tracking a NA Miata? Have wheel studs, pads and rotors from when I thought I was going to build a spec miata years ago. Thought I had sold off all the stuff but found these unpacking from the move. All brand new, for 1.6 NA Miata.      If anyone can use this send me a PM and we'll figure out a price
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Oct 21, 2017 10:14
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Ran Wild Horse Pass (formerly Firebird) east track today, which they just repaved last month. S2000 continues to take endless hammering and punch well above its weight. 
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Oct 28, 2017 22:47
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Well, I had a little oopsie on the track. Around a month ago I was out at Mosport with the BMW club and went off in the exit of turn 1: https://www.youtube.com/watch?v=jX05Sz2jojw This was on the Sunday and I had spent the previous week working until midnight every day to get the car put together for the weekend. I missed the Friday session because while I had finished welding the cage in, the car had no seats or steering wheel. The Friday was spent putting the interior back together. Recipe for crashing: 1. Work 16 hour days for a week before the track weekend (8 hours of the normal job, 8 hour on the car). 2. Don't account for the changes in the suspension needed after adding the cage and dropping ~300lbs from the car 3. Have old tires that almost certainly have a few more heat cycles in them. (they didn't) 4. Decide to push the car after one warm-up lap. I got lucky in that I only bent a tie rod, dented the rear corner, wall rashed one wheel, and flat spotted all 4 tires. It could have been much worse as most of the people I have seen lose it in this stretch end up intersecting with the inside wall head on. I was dumb and went out when tired and without testing the car gradually. Don't be me. The next weekend at the track went much better as I was rested and built up speed gradually. The main thing was the suspension settings needed to be completely different than I had dialed in pre roll cage. Before the roll cage, I was running 8/20 clicks front/rear on the MCS single adjustable shocks and no rear sway bar. After the roll cage, I found I needed 12/20 clicks on the shocks and the rear sway bar made a huge improvement. Unfortunately, my camera ran out of memory before I really got back in the groove, but this is a video where I am still being a bit hesitant on the power coming out of turns: https://www.youtube.com/watch?v=jX05Sz2jojw Note that both of these are 360degree videos so you and zoom and pan to see all around the car.
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Oct 29, 2017 05:28
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those 360 vids are neat as hell.
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Oct 29, 2017 13:42
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Seriously. What kind of camera is that?
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Oct 29, 2017 17:11
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BlackMK4 posted:Seriously. What kind of camera is that? look down 
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Oct 29, 2017 19:06
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BlackMK4 posted:Seriously. What kind of camera is that? Garmin VIRB 360.
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Oct 29, 2017 20:00
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This feels like a really dumb question, but how do I know when it’s time to get new tires for the track? I’m fairly new to track driving and am not really in tune with paying attention to feeling the amount of grip in the tires. The car in question is a 94 Miata with RS-3s with probably 10 track days on it (about half and half between me and the previous owner, and two of those were in the wet) and probably 1k miles of driving on the highway. I don’t recall a noticeable lack of grip from the last track day I did. I’ve got another day coming up at Laguna Seca next month so wondering if I should just run these again (because I am cheap) or get new tires before I go. Still plenty of tread on the tires but from reading around a bit it’s more a heat cycle thing?
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Oct 30, 2017 02:13
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At this stage, and really anyone not running r-comps or slicks, don't worry too much about heat cycles just watch your tread depth. Check your tires before and after sessions, if there's a safe amount of tread run it. Once you've got a few years under your belt and start running r-comps/slicks that do fall off after so many heat cycles you can start worrying about it.
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Oct 30, 2017 10:10
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King of all Machines Operate posted:This feels like a really dumb question, but how do I know when it’s time to get new tires for the track? I’m fairly new to track driving and am not really in tune with paying attention to feeling the amount of grip in the tires. The car in question is a 94 Miata with RS-3s with probably 10 track days on it (about half and half between me and the previous owner, and two of those were in the wet) and probably 1k miles of driving on the highway. Just keep driving. I ran used A008Rs all year (14 events) before swapping to RC-1s. I was shocked at how beat the Yokos were when I switched back to them for a session, but it doesn't matter. You're learning not racing.
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Oct 30, 2017 13:37
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Slicked semis are good as hell if there’s no water. Just drive til you see canvas. It’s a track 
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Oct 30, 2017 13:51
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Came across a picture of my car from a couple months ago still on Nexen SUR4. Apparently it likes to lift the front inside wheel, I hadn't realized this.
BlackMK4 fucked around with this message at 04:55 on Oct 31, 2017 |
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Oct 31, 2017 04:49
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... that really makes me want to get enough measurements of an S2000 to do a suspension model. It should work but I keep hearing there's a lot of little weird things they do.
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Oct 31, 2017 14:23
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My car is set up a lot differently than most, pretty sure it's the super soft rear compared to the front. (850lb springs with a ~750lb sway bar rate up front and 600lb rear springs with a ~175lb sway bar rate) It works really, really well so I don't want to gently caress with it 
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Oct 31, 2017 17:12
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Heh. Swaybars. Swaybars are for chumps. Except for OEM sport shocks, all standard hardware with all bushings four year old or less. They just really like flopping around.
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Oct 31, 2017 20:15
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what kind of baby needs 4 tires on the ground
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Oct 31, 2017 23:20
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Three wheel club 
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Nov 1, 2017 00:02
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My number one bad habit at Lemons was target fixating on cars lifting a wheel and freezing that corner while flying into/ out of a corner.
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Nov 1, 2017 06:10
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Here, have a video of my 3rd afternoon session from Oct 22. Set a new personal best the previous session, the next couldn't get closer than a half second to the time - Track was definitely getting greasy, but I was also trying a different line through one of the corners and it wasn't working. Please ignore my glances at the timer https://youtu.be/lokeDRCyGiw I need a new GoPro battery as I only get about 30 mins before it turns off and that's it for the day.
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Nov 1, 2017 15:35
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I'm a big dumb baby. Is there a big dumb baby guide to filming and overlaying on GoPro with harry's lap timer? I've got a track day Nov. 10th at Carolina Motorsports that I'd like to try it out with. Edit: Also, suggested phone mount for a pixel?
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Nov 1, 2017 18:14
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RaceRender
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Nov 1, 2017 18:17
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 R8 datalog from WTAC. Back home they run on wider slicks. R8 posted:Here's a picture that answers many questions. R8 posted:Believe it or not, but being 30-40 kph down on these three corners mentioned in the post, there is more than six seconds, compared to top pro cars. R8 posted:peak 2.1G on brakes, Holding1.7-1.8 on cornering. G. force is a bit difficult to interpret. There might be high peaks but important figure is a median it can hold for a period of time, say more than a second. R8 posted:Two things. Due to rocker valvetrain we want to avoid running against rev limiter. At 300kph the engine revs 8400 on 6th (highest) gear and limiter is 9000rpm. On full boost up to the top it would hit limiter at 320kph. DoLittle fucked around with this message at 20:29 on Nov 10, 2017 |
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Nov 10, 2017 20:25
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Data systems are awesome stuff.
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Nov 10, 2017 20:51
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This part I don't get:quote:And it shows how we keep it from going too fast on front stretch, dialing the boost from 1.3 to 1 bar above 280km/h, dropping almost 400hp off. Is there a maximum speed they're allowed to hit on that, or are they just concerned about smashing into the redline?
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Nov 10, 2017 21:48
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The driver spun the car a bunch over the weekend and went wide out of T1 a few times. I think they probably did that to keep him from putting it into the wall at high speed. Would like to know what MCA was doing at the end of the straight. I think Sierra Sierra had the record at something like 305kph for awhile. https://www.youtube.com/watch?v=RYHVPsWxHWU
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Nov 10, 2017 22:26
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http://pinderwagen.com/build-topics/suspension/roll-centre/balljoint-spacers/
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Nov 10, 2017 23:41
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Heh, I remember seeing those from some jdm stance company and thinking, "uh, yeah, that doesn't do anything you idiots."
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Nov 11, 2017 00:08
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jamal posted:Would like to know what MCA was doing at the end of the straight. I think Sierra Sierra had the record at something like 305kph for awhile. The R8 driver/owner runs a grocery market as his day job. MCA did 288 km/h on the straight but 255 km/h (!) in turn one. Andy Forrest did 260 km/h on the straight and 207 km/h in turn one. Edit: Video of a rear tyre of the said R8 ovet a WTAC lap: https://www.youtube.com/watch?v=CPrIlsAqqgM DoLittle fucked around with this message at 18:11 on Nov 12, 2017 |
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Nov 11, 2017 00:10
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What is the stickiest 220 treadwear tire? (GTA Enthusiast) I'm assuming the 123S cheater tire is still the go-to. Cheap as fuuuuck.
BlackMK4 fucked around with this message at 22:47 on Nov 12, 2017 |
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Nov 12, 2017 22:42
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Nige rules and is helping me with mine 
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Nov 13, 2017 00:47
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I had the most bizarre damage from a track day (my first legitimate damage from an HPDE), and I managed to catch the moment in (awful) GoPro POV. My oxygen sensor replacement lightbulb lens fell out of its socket on the dash going over the very harsh rumble strip at Carolina Motorsports Park. Oh, that wasn't it. I mean my engine bay air conditioning condenser shook so violently going over the rumble strip that it smashed itself into the fan shroud and threw refrigerant all over the paddock once I parked it. (13:40 below, great slide at the end of the straight, too!) https://www.youtube.com/watch?v=xtOFUmViURk There are worse things that could have happened, I guess. I got some Harry's from a different session as well, but I'm kind of surprised at the low framerate in the video. Is that just because it's going off of the accelerometer refresh rate? And the GPS speed was totally all over the place, not sure what was up there. https://www.youtube.com/watch?v=bIbMfsUtIDM I really need some stiffer springs and a little more sway bar on the car if I'm going to keep tracking it. The Hankook Ventus RS4s are way too much for the stock suspension and even though I'm getting good ultimate grip the car wallows all over and rolls the tires way over into big positive camber. Really hard to get it through transitions. I don't want to do it, though, and ruin its life as a weekend cruiser. 
Dave Inc. fucked around with this message at 01:46 on Nov 13, 2017 |
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Nov 13, 2017 01:39
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What about intentionally running harder tires so they break loose before the suspension gets overloaded?
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Nov 13, 2017 01:54
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IOwnCalculus posted:What about intentionally running harder tires so they break loose before the suspension gets overloaded? Not a bad idea but I'd need something that still has good responsiveness and progressive slip. With my old Yokohama S-Drives trail-braking was almost a guaranteed spin. I really love how well the Hankooks respond and how much slip angle they can handle. Also it makes me extremely happy to keep up with E92 M3s in a 35 year old car.
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Nov 13, 2017 02:01
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KW happens to have just come out with a Variant 3 and clubsport for that car, which tend to ride really well. Looks like about 3k for the V3 (I do get a pretty decent deal on KW though). They even make a lifted version for those safari project cars Leh Keen is doing.BlackMK4 posted:What is the stickiest 220 treadwear tire? (GTA Enthusiast) I'm assuming the 123S cheater tire is still the go-to. Cheap as fuuuuck. There was just some discussion about that in the GTA facebook group. Sounds like 123s, although some michelins came up too, but a supersport probably costs twice as much. Also mentioned: pirelli Pzero, Conti extreme contact, Kuhmo ps91, maybe a federal or zestino in that TW range. jamal fucked around with this message at 02:42 on Nov 13, 2017 |
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Nov 13, 2017 02:22
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jamal posted:KW happens to have just come out with a Variant 3 and clubsport for that car, which tend to ride really well. Looks like about 3k for the V3 (I do get a pretty decent deal on KW though). They even make a lifted version for those safari project cars Leh Keen is doing. Yeesh, that's a bunch for shocks. They do sound good, though.
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Nov 13, 2017 02:36
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It's possible they'll do a less expensive non-adjustable or rebound only version through ST  And you probably don't want to know how much the clubsport (pictured, you get camber plates, stiffer springs, and slightly different shock internals) or the competition 3-way go for.
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Nov 13, 2017 03:12
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Dave Inc. posted:I had the most bizarre damage from a track day (my first legitimate damage from an HPDE), and I managed to catch the moment in (awful) GoPro POV. My oxygen sensor replacement lightbulb lens fell out of its socket on the dash going over the very harsh rumble strip at Carolina Motorsports Park. Oh, that wasn't it. I mean my engine bay air conditioning condenser shook so violently going over the rumble strip that it smashed itself into the fan shroud and threw refrigerant all over the paddock once I parked it. (13:40 below, great slide at the end of the straight, too!) As soon as you said "CMP" and "harsh rumble strips", I knew it was T14. Someone took high speed footage of a Spec E30 race years ago, and you can see how violent those gators are. e: found it https://www.youtube.com/watch?v=HvZYF_fq4w4 Phone fucked around with this message at 03:35 on Nov 13, 2017 |
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Nov 13, 2017 03:32
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Phone posted:As soon as you said "CMP" and "harsh rumble strips", I knew it was T14. Someone took high speed footage of a Spec E30 race years ago, and you can see how violent those gators are. Jesus, I knew they were rough but the entire cars are vibrating. Those things are no joke, and I was trying to steer clear of them as best as I could since I still had to drive home in that car. Poor little A/C condenser just didn't make it. :'(
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Nov 13, 2017 04:04
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| # ? May 14, 2024 00:48 |
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Dave Inc. posted:I really need some stiffer springs and a little more sway bar on the car if I'm going to keep tracking it. The Hankook Ventus RS4s are way too much for the stock suspension and even though I'm getting good ultimate grip the car wallows all over and rolls the tires way over into big positive camber. Really hard to get it through transitions. I don't want to do it, though, and ruin its life as a weekend cruiser. I'd try sways first. They won't really hurt the ride as much vs. springs and should help the roll a lot. And they're usually easier to install and take off if you decide you don't like them. Admittedly I don't know much about porch suspensions aside from giggling like crazy following one at a track day and seeing it lift the front inside wheel all the time. 72ish 911 in this case, hopefully yours has a better setup. Suburban Dad fucked around with this message at 17:48 on Nov 13, 2017 |
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Nov 13, 2017 17:45
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