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  2. It's up to you to decide based on whatever it is you're trying to achieve, and what you want each ecu to do, or how active/functional you need the OEM ecu to remain. In general, 2 wire sensors/triggers cannot be shared 3 wire powered sensors can usually share a signal.
  3. The little Hella units are not rated for any sensible current in a steady load. Peak, surges yes they can do higher, but not continuous duty and I think they quote even less when PWM'ing. And a fuel pump is very much continuous duty. That 525 will easily be pulling 15A or near at base pressures, nevermind with boost. That's already exceeding what the Hella can cope with For water injection, I think my pump only pulls around 5A, so no big deal there, the Hella works great for that....although I will also add it seemed to work best at only 50Hz. At higher frequencies, the pump really struggled. With the Crydoms and my 450's I used this diode across the pump wiring. Probably overkill, but figured may as well go big. Flyback current should never really be high. https://uk.farnell.com/vishay/vft4045bp-m3-4w/diode-schottky-45v-40a-ito-220ac/dp/2115198?CMP=i-ddd7-00001003 Again, I tested this at various frequencies and watched fuel pressure to see if it changed and at various duties, and ended up leaving mine at 200Hz. The likes of a 100A DC Crydom states max is 650Hz. Some lower current versions claim to allow higher frequencies. As for the resistor across the input terminals...really no idea what it is for. I have used it with and without and both seemed to work fine ( with Syvecs ). But I left it in there, as presumably they wanted it there for a reason and it can do no harm being there anyway.
  4. Today
  5. Thank you for your reply. Under normal conditions, it is the battery voltage. When the fan speed is 1 to 4, the voltage is 1.2 to 2 volts. According to the Mazda manual, the judgment that the AC works is less than 3 volts. So this voltage seems to be correct. The problem that the AC request was not correctly recognized by the plug-in ECU also occurred to a friend other than me.
  6. The Hella relay that this thread was about has a flywheeling diode built in and specifically states suitable for inductive loads and controlling motors. The pull-up resistor shown on the Haltech diagram is because their ECU's dont have a pull-up built-in. Ours do so you dont need that. It does not make the signal "cleaner", it is just needed when driving an solid state device to prevent a "floating input". From the few SSR's that I have played around with, the Crydom and other similar industrial ones only seem to work up to about 100-200Hz max and the controllable range of the motor seems to suffer a lot at that. The Hella one worked at 1000Hz for me, although as I said above earlier, I know another guy that had to run his at 500Hz as it got very hot at 1000Hz with a large inductive load. I would like to try one of these one day, but havent had a job for one recently: https://www.holley.com/products/nitrous/controllers_and_accessories/parts/15620NOS
  7. It may have in some old version but at least the latest one it is set to 6 events.
  8. Normally a DI needs less than 1.2V to trigger, but on the S7 plug-in DI1 and DI5 have a pair of diodes in series with the inputs which will lower the voltage by about another 1.4V each (you get about a 0.7 voltage drop across a diode). So anything less than about 2.6V it should activate. Can you explain what yours is doing - does it only activate in certain fan speed positions? Or not at all?
  9. The main modelled fuel table is TPS based. 4D Map is something I will look into. Adam, why does the GTR base map use 4 INJ events as a hold?
  10. Im not sure if it is accel enrichment in this case as at 100% TP and 5500RPM you wouldnt normally need much. However, I would set the accel hold to 6 events for a start, with it set to 2 only the first 2 cylinders will get the full enrichment.
  11. I would move to a TPS based fuel table and compensate for MAP on a 4D table.
  12. With most windows tablets screen off = Sleep.
  13. Thanks for that, I will see if it's the tablet going to sleep etc, I can see it's recorded 7 minutes of data so thought it should be ok. Guess I will go out again for another drive with the logging on. Luckily this should only be a slight tweak to the map, fuelling seems to be about right.
  14. I have an eaton M122 supercharged 3uz-fe in my celica and am very happy with it. Unopened wrecker engine of unknown km's Link storm G4 10psi of boost Mechanical throttle body 550cc injectors Makes 407whp @ 7300rpm Cheers Jappa
  15. I am getting a quick lean spike between high rpm shifts and would like to see if I can target this area. The engine is an RB25 with adapted RB26 ITB throttle setup. It has not caused any drive ability issues but I tend to get an exhaust fireball I would like to try and eliminate. What area in the Accel Enrichment should I address?
  16. Hello My car is FD3S S7 but AC request can not judge correctly. When AC is turned on, the voltage becomes 1.2 to 2Volt. What is the voltage at which the digital input recognizes ON and OFF? I'm trying to solve by adding a relay, but I wanted to know the specifications for digital input. Regards.
  17. your log is full of basically the same value as far as I can see. I have noticed in the past that the logging will "hold" and sit on the last value if the screen/pc goes to sleep. What are your power management settings on the tablet?
  18. I'm glad to someone else has blazed this path! I'm very new to all of this and the learning curve has been steep. That 1k pull-up resistor is interesting. I've never seen it used for PWM on anything else, but I bet it makes for a much cleaner signal coming from the ECU... How big of flyback are you using? I know when it's going to a solenoid, it's supposed to be rated for the amperage that it takes to operate the solenoid. But that's not really feasible with pumps drawing 20+ amps and fans drawing 40+ amps...
  19. Yesterday
  20. So how i know? What about triggers,map sensor,tps?
  21. Depends on vehicle, which sensors/actuators, wiring, and what you're trying to achieve.
  22. The Crydom DC-series SSR's work fine, I've been running my 450's off one all last year with no problems. But yes you do need a flyback diode at the pumps. ( 2x450's off one 60A ) I've a 3rd in tank pump if need be and a 100A relay sitting if and when I do need to use it And in no way whatsoever is the little Hella relay suitable for such a purpose, even from the standpoint of coping with the current of such a pump, nevermind trying to pwm it too. Haltech offer this drawing and is how I use mine with Syvecs. Although a high frequency would probably be better with a proper controller, it does seem SSR's dont really enjoy being pushed in this way. I found mine happy around 200Hz. https://www.haltech.com/wp-content/uploads/2017/10/SSR_Power_SW_Web.pdf I do use one of the Hella SSR relays for my water injection though.
  23. Any time you're running an inductive load it's a good idea to use a flyback diode. It'll even help normal relays last longer by saving the contacts from extra arc burn. I'm wondering if anybody has tried these Crydom SSR's? They have a huge current capacity, accept PWM, they isolate the ECU from any noise from the load with a optocoupler, and you can pick up a heat sync for cheap on amazon. I ordered two 60a (overkill, but they were unused old stock for 40% off) ones off eBay and am going to test them with a fuel pump and cooling fan with PWM from the ECU. But I will definitely be using some big diodes to protect them. They even have a wiring diagram showing how to wire the diode for an inductive load. I'm still waiting on delivery but I'll try and report back when I see how they work.
  24. Hi Adam Cheers for the reply, i found the issue and it was nothing to do with settings. I tried another 3.5MM lead but this one was a 3 ring instead of a 2. Turns out even if you push the 2 ring 3.5MM lead into the port so it clicks it wont work, i had to pull it out slightly. Something so simple.
  25. Hi all,200419.llg I have just updated to the latest PCl200419 v2.pclrink software, just been out for 2 runs to log the data, just got back and dropped the log data into the file to look at the mixture map, only 1 cell is showing with data? Previously the whole mixture map was showing so I could see where I needed to correct fuel. I have a fair amount of data showing on the log file but it looks like I now have to check manually through every cell to be able to see what my fueling was like - this is a rather backwards step! Not sure whats wrong with the setup - have attached the log and map file - can anyone see what I am doing wrong? I am using a tablet to log the data, does it matter at all that the screen is off when logging? Seems to have a full log of data but can't see to get it to correctly show all of it in the mixture map?
  26. Hello guys. I have a question about Knock frequency filters. If our frequency centered according to spectrogram at let's say 9.7 khz or something like that. We must choose 10khz at software because it's closer to 9.7khz? Or if we choose 10khz the Ecu sees only 10khz-10.99khz. At 9khz 9-9.99khz etc?
  27. Hi guys ,which is the correct way of wiring link ecu as piggyback? Spliting the signals from the factory ecu to the piggyback or cutting the connection between the factory ecu and connecting the needed wires directly to the piggyback?. Thanks.
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