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M1tch

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M1tch last won the day on June 11

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  1. I am planning to run boost by gear and think I might look to run some reduced timing, just wasn't sure if there was a 3d table that is usually used to adjust. I will be looking to run the car at various boost levels, will look to gradually increase the boost levels to see where the torque is, just looking at ways to limit the peak torque in the mid range as the higher RPM parts of the map won't need adjusting as the torque would be lower but the top end power will be there. Eg the torque might be within limits for the entire map apart from a small section at say 4k-5k at peak torque so knocking the peak torque back slightly would mean that the box should be fine but I would still be able to attain top end power. To be fair I probably don't really need to be pushing the boost too high anyway, the goal of the project is to run an 11 second 1/4 mile meaning I probably only need to be running mid 300bhp to get there so might not need to run big boost, I guess part of my issue is that I don't know how much power and torque my setup might make.
  2. Hi all, Bit of an odd one, just wanted to ask how best to limit the torque output via the engine mapping, the basis of this question is owing to the torque limit on my transmission - basically looking to limit peak torque in certain scenarios. I will be getting my forged engine fully mapped on a rolling road but just wanted to ask the question now. Basically my forged engine will have the capacity to have a higher torque output than my upgraded gearbox is rated to, I know that my gearbox can cope with slightly more than its rated torque but am looking at how to limit peak torque when needed - a bit like an engine rev limiter. I am guessing I should be able to limit the torque by pulling timing out in certain cells at certain boost levels using a 3D table? Eg: 7 psi - no adjustment 14 psi - no adjustment 21 psi - some adjustment 28 psi - more adjustment For my build, here are my limits (to give everyone an idea): 1.8 Litre engine Forged rods and pistons (9.5:1 compression) Supertech valvetrain rated to 8,500rpm CSS strengthened block able to cope with around 600bhp Stock gearbox with upgraded 3rd and 4th gears - rated to 295ft/lbs although have chatted to someone who ran 365 ft/lbs through them Now, a stock engine with a low boost turbo (7psi) makes around 220 bhp and 185 ft/lb torque, and probably around 250bhp and 200ft/lbs at 12 psi, have seen figures for a forged engine making around 420bhp and the 365 ft/lbs at 35 psi on a GT3071 turbo, I am looking at an EFR 6758 for my build which should flow well at lower boost but not run out of legs at the top end. Is anyone able to guesstimate the sort of torque I should be expecting? I think I should be ok with a bar of boost in terms of torque but anything more I think I might need to run a limit of some sort to keep it around the 300ft/lb mark - basically looking to make the most power I can (as the rest of the engine can make it). I have also seen these engine make around 500bhp at 7,500 rpm and 28psi on a 6262 but the peak torque is probably at around 460 ft/lbs - tad much! Plan for my build is an 11 second 1/4 mile car but daily driven - plan to run full power at the drag strip then drop boost pressure to a lot lower for the road - basically looking to make sure that the gearbox holds ok for the couple of drag runs to prove it can run the time but then turn it down at all other times. Sorry - was a bit of a long post but was just wondering what everyone suggests.
  3. Hi all, Odd question about this, some OEM manufacturers allow cylinder deactivation when on cruise, usually on the much larger engine such as the Hemi powered 300c which deactivates 4 of the 8 cylinders when on cruise to save on fuel. I was just wondering if this is something that the Link ECU could do at all? It would activate when the engine goes into closed loop fueling on cruise as you need very little power to maintain speed when on the motorway etc, even my 4 cylinder could drop to 2 cylinders. Thought it might be something interesting to bring up as I know there are various project cars and cars running fairly large engines on this forum and it might be of interest to keep the running costs down (for example when driven to a track).
  4. Just a quick update, seems to be a bit hit and miss, managed to get a long log of a commute to work but it failed again on a log on a trip back - I set the tablet to be always on, never sleep and never turn the screen off. Will try and log a few more runs etc and see if it messes up again, not sure what caused the last log to fail, never had an issue before the recent update.
  5. Thanks for that, I did see an anti theft setting for the CANBUS I think, didn't know about the DI option - there are so many options for DI on the list!
  6. Hi all, Just wondering if anyone had installed/configured any anti theft or additional security measures using the Link ecu, my car is a road going car so want to add a few additional layers of security. I am thinking perhaps about wiring in a toggle switch to one of the inputs and then hiding it somewhere under the dash so that for the fuel pump to prime (or maybe even to turn the ECU on) the toggle switch would need to be on. Just wondering if anyone had configured anything?
  7. Just been out again, logging seems to be ok, looks like all of the previous times I have logged data I have simply hit record and put the tablet down on the passenger seat, seems to keep logging ok even if the screen turns off after a couple of minutes which is good. Recorded 3 logs, happy to find that fueling is on average 0.1 AFR to target, always satisfying when my AEM gauge is showing 14.7:1 when on cruise without the closed loop lambda settings running Now just need to find a way to log knock levels without turning on knock control, but I guess that's for another day!
  8. 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.
  9. 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?
  10. The current version I just downloaded from the windows store doesn't seem to work on my windows 10 tablet, it starts up but then just crashes out, shame as it would be great to have a dash.
  11. Are we ok to run the 5.6.6.3601 in the downloads folder? I held off updating mine when I saw this post a few months back.
  12. Thanks for confirmation, yeah these are stock cam at the moment, but as you mentioned, maximum advance isn't going to give optimal performance, when I was running the antiquated PFC I did try back to back with the VVTi tables optimised vs all 0s, made quite a difference in low end torque. I was using the 1UZ basemap as a starting point as I didn't have any other VVTi figures to go from, not ideal but going from a table with all 0s to the 1UZ map has yielded a fair improvement in drivability low down although not optimal. I did fire up FCEdit again last light and loaded one of my old PFC maps, I had been using them to check the maximum ignition timing the engine was running on previously (was using Copilot to log and adjust ignition depending on knock), I have matched up the PFC map with the Link map, it would seem that full load on the PFC was at around 11,500 - as the engine is NA that would equate to full vacuum, I had previously logged which cells were being read from as well and can match this up using the mixture map view. I believe the maximum value in the PFC for VVTI was at 28 or 30, 55 would be the highest value in the PFC so that would equate to between 25-27 in the Link so might nudge back the VVTi figures using the 1UZ or perhaps one of the basemaps to get the curve. I think I also saw a setting within the Link help file that stated that I can set it to degrees advanced rather than degrees from fully retarded which might mean I can use the figures from the PFC. I will be going a few drag runs in the next month or so, will be logging data for each run and might do a few adjustments where needed, I did find however that the VVTi optimisation is only really useful at the lower RPMs meaning that for a 1/4 mile drag run it will only be of use in 1st as after that the RPM will probably only drop to 4k or so between shifts so it will probably only run through the VVTi cells once in each run. @Adamw thanks for confirming that if the VVTi goes fully advance it shouldn't cause issues from a mechanical standpoint - that is mainly what I was concerned with.
  13. Apologies, I didn't necessarily mean 'aggressive', and I know that road tuning the car won't get my the perfect tune as there is no way of measuring wheel torque etc. Was about checking if it was ok to use the basemap VVTi figures as the +55 setting for VVTi would be at its most advanced - just need to check that this won't cause issues with piston and valve clearance considering it is a generic starting basemap which I would be guessing would be a safe starting map. I have some VVTi settings from some previous tuning on the Apexi PFC which I think were optimised closer to the 1UZ from memory (in terms of maximum advance) - unless of course the PFC and Link ECU are opposite in terms of what is the maximum advance number.
  14. Hi there, I have currently got a VVTi inlet target using the 1UZ basemap which uses the TP vs RPM to work out the VVTi, I have also had a look at a few of the basemaps for the black, Xtreme as well as the Altezza VVTi values (3S-GE I believe), I think the Altezza one uses a MAP figure vs rpm for the inlet target. Just wondering what values I should use on my 1zz engine, should I look to run the base values from the Xtreme basemap? I can't really tune VVTi on a road tune so would just be looking for the most aggressive but still safe set of values - the 1UZ map has a max value of 35 (35 degrees from fully retarded), the Xtreme basemap pushes this to 55 which is fully advanced (tailing off at higher RPMs) - just checking that this should be ok to run considering its a basemap so should't cause any issues. Thanks in advance!
  15. I have DI#1 set as the speedo in from the OEM loom from the ABS and the calibration number I have works, I have grabbed a DI output and its set to be 'speedo out', there is a folder further down which has the speedo correction figure (percentage or offset etc) - am I correct to say that it will automatically use the DI Speedo out as the output or is there somewhere I need to configure the ECU to tell it what output to use?
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