Jump to content


  • Posts

  • Joined

  • Last visited

  • Days Won


Sam last won the day on April 26 2019

Sam had the most liked content!

Recent Profile Visitors

422 profile views

Sam's Achievements


Newbie (1/14)



  1. @Darryl@pcmtec just having a quick look over this and correct me if I'm wrong but I believe you've put 11kpa= 3.4283, when it should be 3.2483? Which would then change the slope to 19.42 and offset to 1.61??
  2. Sam

    Cam Timing Tables

    Sounds like yous both have confused each other but are talking about the same thing ūüėĄ
  3. Spark is used to control idle rpm. If you have a vacuum leak your spark will drop to try and maintain you desired idle rpm. So your idle spark will vary to maintain your desired idle rpm.
  4. Sam


    @Roland@pcmtec I’ve sent you a pm.
  5. Sam


    Any updates on a rough expected time before the release of the data logger @Roland@pcmtec?
  6. Yes you can add the torque reduction you want. Check out the how to on torque requester's, that give you an idea on how torque requester's work and how to add the torque reduction you want.
  7. @Carl as per the drawing that you attached previously and the wiring diagram below, the clutch switch is wired to ground. When you depress the clutch pedal, the switch will close and complete the circuit to ground. How I'm assuming the input works is it's constantly measuring voltage (voltage is referenced to ground/negative), so if the clutch isn't depressed than the input should be 12v but when the clutch is depressed and it's switched to ground it should be 0v or pretty close to that as there is no/very little potentional difference between the two.
  8. I’ve looked into doing something similar to this in the past as it was a question that was asked, however never had the opportunity/need to actually do it. From every wiring diagram I had looked at (mainly fg) the clutch switch was grounded.
  9. @BeerTurbo did you read the both the pcm and tcm when you read the tune?
  10. Yeah they do, that is another option.
  11. I'll try and help you out with working through the spreadsheet then as it can be a bit confusing the first time you look at it. All the yellow cells on the spread sheet are inputs and can be changed, green cells can not be changed. On the top let hand side you can see it ask for diff ratio, tyre height & Revs/km. Diff ratio should be pretty straight forward to work out and as for the tyre information there are tyre calculators online where you just put in your tyre size eg 285/30/20 and it'll give you revs/km and tyre height. Once all that is filled out you can move across and there is 3 sets of 3 tables, each table at the top of each column is again yellow which means you can change these figures and the 2 tables below are green which can not be changed. The first column top table is labelled OSS rpm, so you can copy the shift pattern straight out of your tune file and paste it here. Once you've done that you should see shift speed and engine rpm tables change which will show you with that diff ratio, tyre height etc etc and those OSS values it'll shift at this speed and this rpm. For example 1st to 2nd in the below screen shot at 98% TPS with OSS value of 1125 the car will shift at 52km/hr and the engine rpm will be 4691. Be mindful it might not be exactly that but it'll be pretty damn close to that, like I said this will get you in the ball park. Same principle works for the next two columns. Second column of tables is for shift speed, so say you want the car to change gears at 50km/hr 1st to 2nd at 98%TPS than you put 50 into that cell and it'll change the OSS RPM and engine rpm tables so you know what OSS value you need to put into your shift table on your tune for it to change at that given speed. Finally the last column of tables is probably the table your looking for as you can input the engine rpm you would like the car to shift at and it'll give you the speed and OSS, put this OSS into your shift pattern table on your tune and it should shift close to the engine rpm you inputted into the top table Hopefully that helps you out a little bit, after reading it back a few times I'm not sure if it'll confuse you more or help you out.
  12. There is a excel spreadsheet floating around on hp tuners forum where you can input some information and it'll help you get into the ball park for OSS for x amount of rpm. I'll try and find a link for you. It'll get you close and from there you can adjust it until your happy.
  13. Haven't actually tried myself but I'm assuming if you change the OSS values in the shift table so at 100% throttle it'll change gear at 6300rpm and set your limiter at 6400rpm this will in theory mean you should never "miss" a gear/ hit limiter, whilst still having the ability to manually shift up and down by tapping on the shifter. Just because you're changing the value from 8000 doesn't mean you can no longer change it manually (as far as I'm aware). Just like Darryl said it may be a good little safety net to stop the car from hitting limiter and potentially damage things.
  • Create New...