Miguel Silva Posted October 30, 2017 Report Share Posted October 30, 2017 Hi, I'd like to know if it's possible to configure an hybrid CAM/CRANK trigger or if it as to be "hard coded" like the "NISSAN 360 Opto" option? I'd like to use the reset based on NISSAN 360 Opto (0º, 180º, 360º, 540º), that I already have installed on the CAM, and a 60 teeth wheel placed on the crank (one tooth is equivalent to 6º crank revolution). To my understanding and I might be wrong, the NISSAN cam trigger has 2 portions the resets with 4 slots one big that corresponds to 30º or 15 slots, the next corresponds to 22º or 11 slots, next 12º or 6 slots, and finally the smallest corresponds to 6º or 3 slots, and with this setup NISSAN doesn't need more than 1/4!? of a revolution to know where it is exactly (knowing that for each of the reset positions pulses it sees 15, 11, 6 or 3 pulses corresponding to the 0º, 180º, 360º, 540º angle position). The second portion are 360 slots corresponding to 2º, the part that is troublesome because of belt slop and or some other CAM related harmonics and it start to have erratic readings on higher RPMs even applying the highest filter possible. The change I need is to have the reset slots pulses correspond to different angle pulses (0º correspond to 5 pulses), (180º correspond to 3 pulses), (360º correspond to 2 pulses), (540º correspond to 1 pulse) of the crank wheel. I don't know how well explained this is, but hopefully someone understands where I'm getting with this. Setup: LINK G4+ THUNTHER on a NISSAN 300ZX Thanks for the help. Quote Link to comment Share on other sites More sharing options...
Simon Posted October 30, 2017 Report Share Posted October 30, 2017 To do what you are looking for would require a custom trigger mode to be hard coded. Which currently we are not in a position to be able to offer the engineering time to implement and are also reluctant to do for non factory trigger modes. I think the best option would be to use the 60 tooth crank wheel and replace the CAS disk with a single cut out replacing the 6. Regards Simon Quote Link to comment Share on other sites More sharing options...
MagicMike Posted October 31, 2017 Report Share Posted October 31, 2017 The Z32 disk has 360 + 6. I'm a bit confused by what you are trying to achieve with this? If you have a crank sensor already why do the 360 slots cause you trouble? Quote Link to comment Share on other sites More sharing options...
Miguel Silva Posted October 31, 2017 Author Report Share Posted October 31, 2017 14 hours ago, Simon said: To do what you are looking for would require a custom trigger mode to be hard coded. Which currently we are not in a position to be able to offer the engineering time to implement and are also reluctant to do for non factory trigger modes. I think the best option would be to use the 60 tooth crank wheel and replace the CAS disk with a single cut out replacing the 6. Regards Simon For the CAS disk there are 2 option 50% open 50% closed and one with a small slot, are they both a real option or just the the small slot will be possible to manually configure? Quote Link to comment Share on other sites More sharing options...
Steve Posted October 31, 2017 Report Share Posted October 31, 2017 You can use both But if you have found one with 50/50 that is somewhat preferable as it will aid in faster startups as the ecu knows where the engine is in its rotation faster. You would choose the "cam LEVEL" option in the ecu for this. A single thooth would be the "1×" option... If you found a level wheel can you link me to it? Quote Link to comment Share on other sites More sharing options...
Miguel Silva Posted October 31, 2017 Author Report Share Posted October 31, 2017 10 hours ago, MagicMike said: The Z32 disk has 360 + 6. I'm a bit confused by what you are trying to achieve with this? If you have a crank sensor already why do the 360 slots cause you trouble? The problems that I have and some others also have are the RPM reading go a bit crazy, as an example on a ramp-run the RPMs should always climb (5400, 5450, 5500...) and on logs I see (5400, 5370, 5370, 5500...) and with the timing light there is always some drift +-2 or 3º from meed to higher RPMs. Applying max filter makes it a little bit better. Has I've posted before it's a belt slop and or some other CAM related harmonics, I'll look for a better explanation from possibly a reliable source and post it here. Quote Link to comment Share on other sites More sharing options...
Miguel Silva Posted October 31, 2017 Author Report Share Posted October 31, 2017 10 hours ago, MagicMike said: The Z32 disk has 360 + 6. I'm a bit confused by what you are trying to achieve with this? If you have a crank sensor already why do the 360 slots cause you trouble? (reliable) A good explanation of a NISSAN RB CAS problem that might apply to the Z32 CAS: https://youtu.be/_sEDuNGnRKA?t=4s (not reliable but the same explanation and conclusion) http://www.gtr.co.uk/forum/266505-crank-trigger-upgrade-yes-no.html Post: 27th May 2014, 10:29 PM Asim R32GTR Quote Link to comment Share on other sites More sharing options...
Brad Burnett Posted October 31, 2017 Report Share Posted October 31, 2017 if you already have the crank trigger wheel, just get the aem 24-1 trigger disc for the CAS and only use trig 2 on the CAS with 1x selection. Quote Link to comment Share on other sites More sharing options...
MagicMike Posted October 31, 2017 Report Share Posted October 31, 2017 1 hour ago, Miguel Silva said: The problems that I have and some others also have are the RPM reading go a bit crazy, as an example on a ramp-run the RPMs should always climb (5400, 5450, 5500...) and on logs I see (5400, 5370, 5370, 5500...) and with the timing light there is always some drift +-2 or 3º from meed to higher RPMs. Applying max filter makes it a little bit better. Has I've posted before it's a belt slop and or some other CAM related harmonics, I'll look for a better explanation from possibly a reliable source and post it here. Yes I have experienced the issues myself (z32), and I now run a crank trigger and single cam sync. Im confused as you say you have a crank trigger hut are still concerned with the stock cas disk. Sort out some cam sync solution like Brad says with aem disc or something and never look back. Quote Link to comment Share on other sites More sharing options...
Miguel Silva Posted October 31, 2017 Author Report Share Posted October 31, 2017 Tanks to every one, I'm going to opt for a 24-1 or a 50% open and 50% closed CAS disk and forget the stock CAS pattern. Quote Link to comment Share on other sites More sharing options...
Steve Posted October 31, 2017 Report Share Posted October 31, 2017 Again. Do you hava a link to that cam level (50/50) disk? Quote Link to comment Share on other sites More sharing options...
Miguel Silva Posted November 1, 2017 Author Report Share Posted November 1, 2017 16 hours ago, Steve said: Again. Do you hava a link to that cam level (50/50) disk? No I don't, I will just measure a stock one and have it laser or water cut. Quote Link to comment Share on other sites More sharing options...
MagicMike Posted November 1, 2017 Report Share Posted November 1, 2017 How are you going to balance it? 50/50 worries me Quote Link to comment Share on other sites More sharing options...
Brad Burnett Posted November 1, 2017 Report Share Posted November 1, 2017 4 hours ago, MagicMike said: How are you going to balance it? 50/50 worries me I wouldn't so much worry about balance on the trigger disc. The weight of those things is nothing. To me it just seems like a waste of time to have one custom made when there are companies out there making the 24-1 and 12-1 disc already. Quote Link to comment Share on other sites More sharing options...
MagicMike Posted November 2, 2017 Report Share Posted November 2, 2017 I just got my trigger from nz wiring yesterday. Do away with the CAS altogether. Quote Link to comment Share on other sites More sharing options...
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