Started by Anon, May 30, 2022, 15:05
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Quote from: Anon on July 16, 2022, 08:49The moment when the clutch went....
Quote from: Anon on August 1, 2022, 12:46I have a pair of drive shafts here that are thicker that came as "spares" with the car. I suspect they are from the 2zz donor Celica or Corolla etc.They are in far better condition to the ones on the car, which have split boots and zero grease in 2 joints.But it appears that the longer shaft of the pair (drivers side), is slightly longer than the MR2 ones.The splines all seem the same, the ABS rings measure the same OD.Which should I use? Are the thicker ones OK to fit? Green ones in the picture are the "spares package" ones that came with the purchase of the car - I was told by the seller these are an upgrade and thus they were included with the car.I've done a bit of googling already but it's hard to see the wood from the trees.
Quote from: Anon on August 15, 2022, 20:16Went to three sisters again today for a track day.Weather was good, first towing job for the Toyota Vellfire van which is lovely to use as a track day hospitality/repair suite. Van tows amazing compared to the Rav4.Nothing fell off the car, nothing rattled, roof stayed together, all worked perfectly Got some pretty quick laps in, last few sessions nothing passed me. There was an E36 beemer there that was pretty fast, in the morning I let him past a few times. In the afternoon as it dried up and gained some confidence I never saw him.I fancy a tinker with the gear change, its really horrid. Struggle to find 2nd coming into tight corners - always have in my Celica, then the Corolla and both MR2's. Gear change on them is gammy.I think we are ready for some bigger faster circuits. I feel this little car can go pretty fast round some big circuit bends
Quote from: Anon on August 16, 2022, 16:23With a passenger in the car, on that track addicts app... 1:06:194And a very damp session on my own 1:05:07 in the morningAnd the best session in the afternoon I forgot to press record on the app, but I did have a really poor dash cam running, but its hard to measure frame by frame... It was still damn, but the line was pretty dry:-01:05:1801:05:1501:05:2101:05:0101:06:1801:05:1901:06:0201:05:16The day ran really well though, a few cars broke down and got towed in, otherwise quite a good one.
Quote from: Anon on August 16, 2022, 19:51Yeah consistently messy how dare you get in 106s that's bad defo not much in each lap for sure
Quote from: Anon on September 14, 2022, 09:42Been messing about with datalogging apps on the Android phones, all very impressive stuff for incredibly small money spent. It was watching the DannyDC2 MR2 race videos that really caught my eye.Then came the stumbling block, the 2zz-ge MR2 uses an early Japanese ECU which doesn't comply with normal ODB2 KWP2000 communication, it uses some weird JOBD platform.I was originally using TrackAddict but there was no way of getting it working on the JDM 2zz-ge ECU, but it turns out that RaceChrono does allow all weird and wonderful custom commands and stuff! Tinker time indeed.After some googling, it turns out that someone has figured out the correct ELM327 commands for the JOBD ecus (on some Torque Pro gauge app forum), which is:-ATIB 96 \n ATIIA 13 \n ATSH8213F0 \n ATSP4 \n 0100So you put that in "Initialisation Commands" settings box, and pick protocol 4 And then we are datalogging throttle position, revs, vehicle wheel speed sensor, coolant temp.. all sorts. The down side is the refresh rate isn't amazing, and the more channels you pick the slower it gets. Keep it sensible, just Revs, VSS and TPS and we are getting 2hz which is fair for a budget!Then I really wanted brake pedal datalogging... it is good to see the braking points consistency etc. Thing is the 2zz doesn't have a brake pedal switch input (the 1zz Mr2 does though).Using my scanner I noticed there is a channel for "power steering oil pressure switch" from when this is used in a Toyota Celica or Corolla which has a mechanical hydraulic steering pump with a pressure switch.So I made a custom PID input in racechrono with an algorithm like this.. it uses PID 0x01E8 and it extracts bit 6 which goes from 0 to 1 if the oil pressure switch is high/low. Then x100 so the brake goes from 0% to 100%. Then I wired up a feed from the green brake light wire, which energises a relay, creating a ground on the PSOilPressure input pin D28 - because the oil pressure is a ground switch basically. So now we get a nice datalog with brake pedal input too.This is all just using a super cheap £5 ELM327 bluetooth OBD2 device (beware some are very poor and some are semi functional, find a good one in the chinese lottery!). I also tried to use a Carista interface but I found the datalogging speeds were about 20% slower.Coupled with a solid mount for a phone so the G force sensors are as accurate as possible and an external GPS receiver - I'm trying a Garmin GLO which claims 10hz, this should be a pretty nifty datalogging setup for an imbecile like me.
Quote from: Anon on September 14, 2022, 11:17If you want a known working ELM327, PM me your address and I'll send you one in a jiffy bag.Did you mess with the initialisation stuff etc?I bet if you use the initialisation string etc you'll be up and running as the JDM corolla will be on the same protocol as the celica one.
Quote from: Anon on September 15, 2022, 22:44Been playing with this datalogging stuff tonight again. The Garmin GLO bluetooth GPS unit is ballistic for the money. I'm getting 0.6m to 0.7m location accuracy continually at 7 to 8 locations a second.That blows my head off that you can track something so closely in the big big world we live in, for beer money.I have found the OBD2 data logging is running with a delay of 526 milliseconds.The VSS speed value from the ECU is lower than reality by 4%.So here is graph with those two factors corrected....But it goes to prove that GPS cannot measure very quick velocity changes, you can see the gear changes more realistic on the OBD red line.
Quote from: Anon on November 18, 2022, 10:28Thus bought some carbotechs to see how they fair XP8 on the rear, xp10 on the back... hoping to shift a bit of brake bias forwards.Only other thing to report was I found 3 out of 4 of the MeisterR coiler overs had come loose on the ride height adjuster lock nuts. Front right was physically rattling about.Then did another Oulton day on Tuesday, but it was a wet one, very wet indeed. Like an idiot tried going out on the AR1 tyres, 2 laps and came back in! AR1's do not work on standing water, scariest drive ever. It rained less, moved over to a set of NS2R's I had, then enjoyed the rest of the day as a dryish line came along the track though out the afternoon. But the NS2R's have got nothing on the AR1's by along way. Spent quite along time chasing this little Ignis turbo that belongs to a friend. But shock horror... nothing fell off, nothing broke, no rattles!
Quote from: Anon on November 18, 2022, 14:18I'm booked in for Wednesday 30th November and Friday 9th Dec. But maybe I could do another one, last jaunts before Christmas..... but you will be way faster than me
Quote from: Anon on November 29, 2022, 13:03I can promise you the weather will be dry... because I've bought a set of wets
Quote from: Anon on December 14, 2022, 13:35As for the eye watering expensive Carbotech pads, I'm running XP10 fronts and XP8 rears... Totally blown away at the braking performance on stock calipers and blue print OEM spec disks. If you bring the brakes in smoothly and ramp up the pressure (so you don't just lock up), you can press harder and harder crushing the front end of the car into the tarmac. All passengers have commented that the car is nuts in the braking zones.But the main reason I'm posting this is the wear rate is fantastic, 4 track days in and there is barely anything gone off them. I'd be fitting the 3rd set of yellow rears at this point and maybe just about due for a 2nd set of fronts. Carbotech pads were expensive, but I'm pretty confident they are going to work out cheaper due to the wear rate.
Quote from: Anon on December 14, 2022, 13:35easybleed caliper nipples, they have a 1 way valve in them