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Roman

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Roman last won the day on June 17

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  1. I know you're looking for NZ based stuff, but have you had a scour on YAJ? There's some weird tercel stuff thats a laugh "Unopened Yonezawa Tercel gate Tercel game Men's 5-stage conjugation course for girls You can play for 24 hours!" https://www.jauce.com/auction/s1011126335 https://www.jauce.com/auction/v1008131154
  2. Nearly finished this bit, and the lid part is currently printing. Having a 3d printed core is 100% cheat mode for carbon stuff haha. It makes drilling/filing the holes super easy, because I can just work from the other side and shows me exactly how far I need to go (a few of the holes as pictured need a little more work with the dremel) Most of the work is sanding down sharp edges, I dont think I've experienced any splinters more ruthless than from CF. Definitely 100% do not want to get that shit in your eyes/lungs/whatever. Although I've got a setup that can do vacuum bagging and /or resin infusion, or making 2 piece moulds to make a 100% carbon part. Wet layup and retaining a thin printed core provides excellent results that is about 1000 times less effort. It's also nice because you can retain 3d features like upstands for clips or bolts or whatever, rather than being left with a super thin material that you then have to add stuff to. Which is another time consuming step where you could get things put in the wrong place. A++ would cheat again
  3. Still work to do but super stoked with this
  4. Test fitted ok but need to figure out the filter situation. Pod filter is easiest thing for now So on to version 3.0 to see how this fits And artists impression
  5. I love those clips on the super tourer one
  6. Time for an airbox to try stop the motor from inhaling 50,000 mozzies per hour. So started with a basic 2D profile. Found it hit where the bonnet rounds off a bit. Bought some play dough and smooshed it around the place to check clearance. Generally better than expected, have got 20-25mm to the closest brace part. So measured up the places I had to cut, then modelled V2.0 which is currently printing Once this is done, if it clears everything and there are no other issues. Then I need to decide how to divide it up into sections so I can still get inside to do up the bolts for the throttles. And then figure out what sort of air filter it's going to have, whether try jam a panel filter on it (probably makes sense given available space by radiator) or just transition to a round to jam a pod filter on there. Still a few iterations left to go until it will be a usable thing, but getting there. EDIT: Will be something like this
  7. looks cool as! Man a passenger could accidentally wreak havoc though with some knob fiddling. Does the glove box lock? Or take good photos of all of the positions haha
  8. I will have some considerably better options available to test on the day. However I'm still keen to see what it can do on a 185 with a bit of trickery.
  9. The ECU outputs a value called Engine Speed Rate of Change. But it's not great. This generation ECU (G4+) doesn't have any capabilities for smoothing or averaging, so the results are very jumpy. I checked to see if the rate of change in the first 3 gears would be anything useful, but it's a mess. I think for a max accel ramp to work, you really need an equivalent of a non driven wheel speed signal. in which case you may as well look at slip rate directly. Maybe an accelerometer would do the trick, but untangling yaw/roll/pitch/etc from straight line acceleration is big task. This is what ROC looks like, a bit messy: But for easy adjustment at drags etc, I can setup another axis on the rpm limiter table that is controlled by a potentiometer or canbus input. As ideally it would be nice to have it adjustable in cabin without a laptop hooked up. Speaking of such things though, with some bodgery I managed include my 20hz GPS into the data that my dash outputs back to the ECU. (and use for dash stuff I guess) So this can give a rough equivalent of a non driven wheel speed: (might need to add some smoothing) I'm not sure if this will work well enough to use for traction control off the line though. It has some weird bumps in the values sometimes. But after butting my head against NMEA data for a bit, (thanks, person who wrote a library to decode it) there's some interesting stuff that comes in from GPS. You can get the date and time from a GPS signal too, which is kinda cool. As well as which direction you are travelling in. And Altitude. Also it can plot latitude and longitude, so you can draw a map. Because it's in the same log file as everything else, you can overlay TPS position, or vehicle speed, or whatever else as a colour scale. My fairly bodged together code for this ends up wrapping the values at the moment, if you go too far. Not sure how useful this will be, as I've got no motivation to completely reinvent the wheel of Racechrono etc. Which is already very useful and easy to use.
  10. A bolt physically cant come out unless the top bolt comes undone as well. Because it cant unwind far enough to come out of the slotted part. A nut makes me a little more nervous about it coming off and the motor eating it. Although that's probably next to impossible.
  11. So a few different things ABS pump / wheel speeds I've not been able to make any progress on the ABS pump swap, because I cant get to an Auckland pick a part site to grab some other wheel speed sensors. Doesnt look like I will be able to any time soon. So for now I've put the regular speedo drive back in, and wired it up. Will just repin to suit standard ABS pump. Track day next Friday! Exciting. Traction control setup Since ABS setup wont work, I have setup a timer based RPM limit instead. If vehicle speed is zero, and you are over 90% throttle. Then the rpm limit changes to 4000rpm. and a timer resets to zero. As soon as it sees that the car has started moving, the timer starts and the rpm limit starts increasing along with the timer up to the normal max. So the idea is that if the rpm goes faster than what is physically possible for the car, it must be because of wheel spin. so a few quick ignition cuts then you're on track again. It's taken a bit of trial and error to setup, but its working good so far. Green line is engine speed and yellow line is the rpm limit. So ideally on a good grippy launch you stay just below the yellow line with no intervention needed. It's not ideal and I'll still pursue getting front and rear wheel speeds. But it's pretty good in the meantime. Rear disc swap It was only $65 at pick a part for an entire disc brake rear end including hand brake cables, ABS sensors etc. So cant complain about that. The only tricky part of swapping it in, is that you need to remove the exhaust in order to remove a heat shield, to swap the hand brake cables. Certainly not the worst swap of this sort I've done. Not sure if I'll get this swapped over in time for track day next Friday. Probably a good idea to get new discs and pads. Trumpet swap So far I've had the best powerband by using some rather long trumpets. They've been through a few iterations fine tuning the angle and lengths so they dont hit the bonnet or the radiator cross member. However the current iteration that I'd settled on still ever so slightly rubs on the bonnet when the motor is under extreme movement. It's only the slightest rub so I'm not actually concerned - and only on one of them. But long term I need an airbox over them and an air filter, so there's simply not enough room. So my only real option was to put a much more aggressive bend in the trumpet and then as a result they are a fair bit shorter. But also more clearance around everything. As a result you cant fit the bolt into the bottom hole anymore, it needs to be slotted So I went for a drive to see how the powerband would change, expecting some slight losses if anything. However so far results are looking better than before, considerably better. Not sure why though. To reach target AFR you can see the closed loop lambda was wanting to add a peak of 22.7% more fuel which is an insane increase. I added the extra fuel then reran, and it stayed on target with minimal trim. So that was interesting. But I'm not quite convinced this is consuming 22% more air with just a trumpet swap. However it's possible that the older trumpets were badly shrouded by the bonnet and the radiator cross member. It's now up to 69.9% duty cycle with the 2ZZ injectors. Previous best was 66%. Although thats only really an indication of what's happening at max rpm. My fuel map is looking increasingly comical. I think I need bigger dia exhaust and/or VVTI to reclaim that mid range. It would be pretty good to get some of that 4000ish rpm region beefed up. On the whole though, have been fixing up some minor issues but I'm as good as ready for track day. Cant wait!
  12. Could the distributor be 180 degrees out?
  13. Yeah need different pistons for vvti to work. So will do rods at same time. Was going to do exhaust some time after hoist is operational. Thats on hold thanks to covid
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