Guest tlmainiac Posted November 7, 2004 Share Posted November 7, 2004 first let me start by saying awsome work on the dett swap! i am doing a vg30det swap into a z31. what engine management swstem are you using? i need to find a standalon that will work with the vvt or vtc however you say it.how have you planned on dealing with that? i am going to get the engine to start fabbing mounts ect... next week and really cant decide on what to do about a standalone sys. any help you can give would be greatly apprecieated thank you Quote Link to comment Share on other sites More sharing options...
cheftrd Posted November 7, 2004 Share Posted November 7, 2004 Any stand alone that incorporates an rpm switch will work the vvt. Its simply an on-off switch. The most diffucult part of a stand alone set-up is manufacturing the crank trigger. Haltec will work with the stock Nissan cam sensor for ease of installation. I've also used SDS with the VG. If you use an MSD DIS4 with the SDS, you can wire the stock coils to be fired on three channels by the ECU. This eliminated the need for mounting the aftermarket coils and unsightly plug wires. It will also operate the stock Nissan Idle up for warm up and AC activation. Good luck. Quote Link to comment Share on other sites More sharing options...
Guest tlmainiac Posted November 7, 2004 Share Posted November 7, 2004 thank you verry much for the info but i thought the vvt had to different trigger points here is what ive been able to find out about it Intake cam gears act as following Under Idle intake cams is retarded 10 degrees to provide a better idle After 1000 RPMS the intake cams gears go back to 0 after 4000 RPMS the VTC intake cam gears advance themselves 10 degrees wouldnt it need to be triggered twice? Quote Link to comment Share on other sites More sharing options...
cheftrd Posted November 8, 2004 Share Posted November 8, 2004 On the back of each head is a solenoid to control the varrible cam gear using oil pressure in the cam. It's only a two position (on or off) switch. There are several verriables that determine when the cam is advanced, increasing valve overlap; it takes into consideration things like throttle position, airflow, rpm, etc. when arriving at an engagement point. This is beyond the capability of any off-the-shelf engine management. The engine runs and idles fine with the system disabled. It will have a little less power below the apply point. If you want to use it, simply hook up a relay to be activated by an rpm switch set at a point that you think the cam should advance. Quote Link to comment Share on other sites More sharing options...
Guest tlmainiac Posted November 9, 2004 Share Posted November 9, 2004 thanks for the information.looks like i was misled the first time because i have found that same information on another site just wasnt sure about it.one question about what rpm should the cam advance at? 3500?4000? im am still doing a lot or research on tuning a det so any help i can get is much apprecieated Quote Link to comment Share on other sites More sharing options...
cheftrd Posted November 10, 2004 Share Posted November 10, 2004 4000 is a good start point as you generally dont cruise over 4k and you dont race below 4k. The best way to find the actual-best switch point is to run the car on a dyno with the vvt on for the entire pull and off for another entire pull. Overlay the graphs and the switch point will be where the vvt-on torque overtakes the vvt-off torque. Quote Link to comment Share on other sites More sharing options...
Guest tlmainiac Posted November 13, 2004 Share Posted November 13, 2004 thank you for the information i emailed haltech to see if their ecu could be configured to switch the solenoid for the vvt but have not gotten a reply.the microtech ltx12 will do it but i like the fact that the halltech can use the factory sensors. just have to find a way to trigger it. Quote Link to comment Share on other sites More sharing options...
cheftrd Posted November 14, 2004 Share Posted November 14, 2004 The Haltech will switch the vvt. Don't go through Haltec as their customer service sucks. Better to go through a tuner like this guy: http://www.hitman.hm. His name is Matt and he's very knowlegable on the Haltec system. Quote Link to comment Share on other sites More sharing options...
510six Posted November 14, 2004 Share Posted November 14, 2004 Talk to a friend of mine Vern at Raver Motorsports .They just ran over 220mphwith a 96 300zxtt on the salt at Bonneville using a modified stock computer...something akin to a Hondatta system , but akin to Nissan ECU.(559)7334711. Quote Link to comment Share on other sites More sharing options...
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