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mekilljoydammit posted:But that's me, who spent most of last year wondering why I didn't beg/borrow/steal my way into a W2W ride 10 years ago. Chalk this up to arrogant dickery if you want, but at this point I literally cannot understand why someone would spend an equivalent amount of money doing track days as they would running an SM. Who here is saying to have Rossini rebuild your motor once a season, or run fresh SM7s every weekend? Not to mention things like keeping the SFI certs valid on your harness/nets/HANS. Owning a SM and running it as a DE car is one thing, showing up with a car that can keep pace every weekend is another. And as someone who has to run a compromised suspension due to my rulebook I'll say there is no reason to not have a DE car handle beautifully. Forcing cars that have quirky suspensions around a track is a racing problem, DE cars should be built for max enjoyment. Making parts decisions because you might w2w in a decade seems silly. It's pretty likely you won't even race the same chassis. Wrar posted:If you actually race doesn't Mazda's contingency program poo poo on everyone elses, AKA parts pretty much at cost? The parts are discounted pretty well, but not close to at cost. Cheap dorman poo poo from Rockauto will beat racer prices by a lot. For OEM stuff it's pretty nice, although it all ships out of the west coast so if you live on the east coast you have to plan ahead quite a bit. However, if you race in an active class and are good you can get an end of year check for a lot of money. Winning a NASA class & nats will net you $5750 on a prepaid Visa.
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Feb 3, 2018 02:31
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Well, had my first wheel to wheel action today in the form of ice racing. I've never had so much fun in my life. It's structured in an endurance format, with 6x 40minute sessions, cumulative number of laps. 3 drivers per team, no studs/tractionizing allowed. While contact is frowned upon, being an ice race there was certainly a fair amount. I don't think we ever got going faster than probably about 40mph. From a previous year, here's a vid showing what I'm talking about : https://www.youtube.com/watch?v=gz0tNf0Rd4o or https://www.youtube.com/watch?v=b9144ugi7YA TrueChaos fucked around with this message at 01:08 on Feb 12, 2018 |
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Feb 12, 2018 01:01
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TrueChaos posted:Well, had my first wheel to wheel action today in the form of ice racing. I've never had so much fun in my life. Holy cow, that looks like a ton of fun.
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Feb 12, 2018 02:47
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TrueChaos posted:Well, had my first wheel to wheel action today in the form of ice racing. I've never had so much fun in my life. I really want to join in on the local Chevette ice-racing series. Here's an in-car video from a Chevette/rubber car: https://www.youtube.com/watch?v=5qEITe0hUhE Unfortunately, I believe they've been having trouble finding enough entrants to field a class in later years, probably because all Chevettes in the province were consumed by these banger races previously.
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Feb 12, 2018 06:35
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TrueChaos posted:Well, had my first wheel to wheel action today in the form of ice racing. I've never had so much fun in my life. yooooooo this looks awesome. I wish I had storage for a dedicated car to destroy for doing things like this.
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Feb 12, 2018 14:07
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A little early, but to mention again from a few posts back. Looks like I may move west (currently in Philly), and my track-prepped sunburst can't come with. $4500. I hope this doesn't break any rules - please let me know and will delete if so. BTW I've had this car since 2009 so no surprises.  quote:-1992 Mazda Miata Blaise fucked around with this message at 15:55 on Feb 12, 2018 |
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Feb 12, 2018 15:52
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Gigi Galli posted:yooooooo this looks awesome. I wish I had storage for a dedicated car to destroy for doing things like this. Yeah, having the space is key. The car we're driving used to be my daily, but looming emissions testing (which would have meant probably 500-1000$ worth of work) meant that it was time to turn it into an ice racer. Bumpers are frequently replaced with a 2x6, or some tires cut up to cover the metal bumper supports, and the most frequently seen tools in use in the paddock were various forms of sledgehammers, sawzalls, and bailing wire (which is how our bumper is currently "attached"). The bodywork gets pretty beat up, this was our car by the end of the day:  We finished 6th out of 18 with 274 laps over the 6 sessions, including 10 minutes in the pits reattaching the bumper. Given our pace, without the downtime for bumper work we would have been competitive with the podium finishers.
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Feb 12, 2018 17:10
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e: nm
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Feb 12, 2018 17:14
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That's a pretty good deal Blaise. The only thing that gives me pause is the "No structural rust." So then where is it rusty otherwise? 
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Feb 12, 2018 18:01
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Larrymer posted:That's a pretty good deal Blaise. The only thing that gives me pause is the "No structural rust." So then where is it rusty otherwise? You can see it in the photo. Standard miata spots. On an NB, this is still a concern as the front frame rails can split, but on an NA this is only cosmetic.
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Feb 12, 2018 18:57
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Blaise posted:You can see it in the photo. Standard miata spots. So you can race with rocker rust? This is some excellent loving news.
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Feb 12, 2018 21:53
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BloodBag posted:So you can race with rocker rust? This is some excellent loving news. Yup!  I just don't want somebody to think that there's no rust on it at all. There's a reason this is the car I've been using to track.
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Feb 13, 2018 13:28
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Anyone have ballpark pressures on Hankook Z221 C30 tires? I started out around 36 hot and slowly went down to 30 hot last weekend, but now I am hearing I went the wrong way. I won't be running them again after they die, but it was worth a shot.
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Feb 23, 2018 05:30
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BlackMK4 posted:Anyone have ballpark pressures on Hankook Z221 C30 tires? I started out around 36 hot and slowly went down to 30 hot last weekend, but now I am hearing I went the wrong way. You really need a pyrometer to tune tire pressures. I have this one and like it: https://www.joesracing.com/i-21092094-joes-deluxe-racing-pyrometer.html
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Feb 23, 2018 23:23
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Hankook themselves recommends 40psi hot target. http://www.hankooktire.com/common/files/motorsports/competition-tires/2017_hankook_tire_competition_tire_catalog_circuit.pdf My rule of thumb is target high 30s for hot pressure on most rcomps, and low-mid 30s for street tire compounds. NT01 is what i use most and the sweet spot seems to be 36-38psi. For qualifying I tend to go much lower since I always do less than 5 laps.
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Feb 23, 2018 23:47
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Crustashio posted:Hankook themselves recommends 40psi hot target. 40 hot... jesus. I wasn't getting nearly to the edge of the tire at the higher PSI / the tires felt weird so I started going down. I'll try 40 hot next weekend. User Error posted:You really need a pyrometer to tune tire pressures. I have this one and like it: https://www.joesracing.com/i-21092094-joes-deluxe-racing-pyrometer.html It's on the list, I just haven't gotten around to ordering one yet 
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Feb 23, 2018 23:54
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User Error posted:You really need a pyrometer to tune tire pressures. ... and your alignment, and your spring rates and swaybars, and even the dampers to a point.
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Feb 24, 2018 00:58
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Apparently I have some reading to do
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Feb 24, 2018 01:23
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Short version is we want to get the most we can out of all four tires. That means that ideally, they will all be the same temperature, and also the same temperature across the whole tread. Although for time attack having extra camber for more cornering grip, and therefore hotter insides of the tread, seems to be worth the tradeoff. And then if the center of the tread is hotter, the pressure is too high. If the center is colder, too low.
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Feb 24, 2018 02:10
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What about a thermal camera? :v
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Feb 24, 2018 02:38
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Wrar posted:What about a thermal camera? :v https://youtu.be/uUyvyUthHIc
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Feb 24, 2018 03:40
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Holy poo poo 
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Feb 24, 2018 03:47
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https://www.youtube.com/watch?v=a6WjHZH96_g
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Feb 24, 2018 03:59
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That is rad as gently caress.
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Feb 24, 2018 04:21
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We live in the future.
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Feb 24, 2018 05:10
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It's pretty nicely packaged too. Izze may be getting some of my money in the future, unless I wander down the rabbithole of DIY.
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Feb 24, 2018 17:44
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It is neat, but generates a lot of data to analyze. Maybe too much and maybe not all entirely useful. Plus it is measuring tire surface temperature, which as you can see is wildly variable from corner to corner. The bigger concern is what is happening to the casing over a longer period of time (maybe just one hot lap, maybe multiple hours in an endurance race). A tire temp probe does all that already without fancy IR sensors and computers by measuring the temp deeper down in the tire.
jamal fucked around with this message at 22:49 on Feb 24, 2018 |
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Feb 24, 2018 22:16
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mekilljoydammit posted:It's pretty nicely packaged too. Izze may be getting some of my money in the future, unless I wander down the rabbithole of DIY. For just $3000 per tire sensor and $300 per brake sensor, you, too, can have a Forza Motorsport-style data layout.
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Feb 24, 2018 22:34
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It’s a load of forum style overkill for track days is what it is
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Feb 24, 2018 22:48
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The Prong Song posted:For just $3000 per tire sensor and $300 per brake sensor, you, too, can have a Forza Motorsport-style data layout. Uhh... it's $1750 for a full car's worth of the tire sensors, not sure where you got $3000/corner. Homebrew style system would be even less; I've priced it out but had other priorities. jamal posted:It is neat, but generates a lot of data to analyze. Maybe too much and maybe not all entirely useful. Plus it is measuring tire surface temperature, which as you can see is wildly variable from corner to corner. The bigger concern is what is happening to the casing over a longer period of time (maybe just one hot lap, maybe multiple hours in an endurance race). A tire temp probe does all that already without fancy IR sensors and computers by measuring the temp deeper down in the tire. I'm a test engineer on my day job - I'm used to using a bunch of tools to analyze data (in some cases far far far more data than this) In this case think of, say, trying to correlate tire/suspension dynamic models, or model heat cycle vs temp vs grip, start analyzing where you're burning the tires off, etc. Bape Culture posted:It’s a load of forum style overkill for track days is what it is Engineers gotta engineer.
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Feb 25, 2018 05:03
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Finally went over the car to see what I need to do in order to be ready for this year. In addition to changing all the fluids I had to re grease 2 of the sliders on the brake calipers. And they said Miata's were low maintenance. :/ My rear hubs are pretty much past their service life, but I'm hoping to stretch them until I have my garage built
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Feb 26, 2018 02:02
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I had a pretty fantastic track day experience that I posted in the BMW thread, here. https://forums.somethingawful.com/showthread.php?threadid=2809820&pagenumber=873#post481678676     
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Feb 27, 2018 04:44
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Here's a clip-reel of me being dumb and bad but still enjoying it, as well as one of my fastest laps, at Carolina Motorsports Park a couple of weeks back. https://www.youtube.com/watch?v=uqVWQM6IOoM
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Mar 1, 2018 17:29
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This is really weird, but the video freezes at 6s, even though the audio keeps going. Happens on both Chrome and FF, even though other YT videos are playing fine.
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Mar 2, 2018 02:47
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Hell yeah  Pro-tip: Move the camera up so the sensor is at eye level on your helmet
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Mar 2, 2018 03:23
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kimbo305 posted:This is really weird, but the video freezes at 6s, even though the audio keeps going. Happens on both Chrome and FF, even though other YT videos are playing fine. I just had it happen at 29 seconds on my phone. Weird.
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Mar 2, 2018 03:28
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BlackMK4 posted:Hell yeah I can't get it up any further. My gopro needs viagra. It's an old Hero so I either turn it up or down from the suction cup on the side of the helmet. Up you stare at the mirror, down you peek over the top. The mirror is probably better but neither are great. When I used a friend's session it was perfect, but the camera style just doesn't quite work. I'm going to try doing it from the rear side window next time, might be more interesting.
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Mar 2, 2018 22:05
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At what point should I be tossing rotors? When cracks start to catch your nails, or can you continue running them until they are longer than an inch or something?
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Mar 5, 2018 17:51
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Minor checking is fine. If you have one continuous crack from the edge of hat to the edge of the rotor, time to toss.
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Mar 5, 2018 18:06
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Pros/Cons of removing a Miata's parcel shelf aluminum tray for track use?
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Mar 5, 2018 19:43
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