260DET Posted February 17, 2006 Share Posted February 17, 2006 Found some info, VVT is good for an extra 30 ft/lbs of torque with the stock motor and is of the on/off type, not incremental. It kicks in at between 3500 and 4000rpm and kicks out at 6100rpm, not sure why it is set to go off at high rpm. As for operation, a good high end aftermarket ECU will handle it, may also be possible to get a stand alone device to do so too. Will post any more relevant info as it comes to hand, must say I'm curious as to why it is set to kick out at high rpm. Quote Link to comment Share on other sites More sharing options...
1988 SSDET Posted February 17, 2006 Share Posted February 17, 2006 I had my car out yesterday. First time since the fall. Fired up on the first crank (Got to love Nissan) I had my spare motor as a 3-d referance, I was able to get my motor running pretty close to stock with a little help from everyone who has gave info on this motor. Like I said I'm running stock 7 lbs. I had real traction problem in first and second, third however it hooks real nice.(I have a VLSD). I do have the vvt running at this point, but I'm pretty sure it comes on around the mid 5xxx rpm. I can't confirm this other than seat of the pants feeling. Here is something I found out about the vvt: The VTC high rpm switch point should be set to around 5800 rpm but if you're going with a lot of boost, set it lower. The rev limit is 7000 rpm. Yesterday, was a good start I was playing around with my boost controller I started to lean out with 13lbs. I took it for one run around 10-11 lbs of boost and I was very pleased Quote Link to comment Share on other sites More sharing options...
260DET Posted February 19, 2006 Author Share Posted February 19, 2006 What I've been told about setting the VVT is to do dyno runs with it off and then on. Compare the two power curves where they cross over and then set the on and off switching points accordingly. If using an aftermarket ECU the good thing is that on most you will be able to use a single auxiliary output to run the VVT. So a high end ECU giving incremental output is not necessary. For me that means using a MoTec M48 at ~AU$2099 instead of a $3177 M600. The VVT can also be run by a stand alone device, such as a GReddy e-manage so I'm told. So, for anyone doing a transplant there is no excuse for not using the VVT Quote Link to comment Share on other sites More sharing options...
mtcookson Posted February 21, 2006 Share Posted February 21, 2006 do you guys happen to know the opening/closing times when the vvt is on and off? i've been trying to figure out the best way to set the vvt on an n/a motor with some boost and am not sure which would be best. for instance, an n/a motor likes a lot of overlap and from what i understand when the vvt kicks in there is a large increase in overlap. is it the opposite for a stock turbo engine (vg30det(tt))? Quote Link to comment Share on other sites More sharing options...
260DET Posted February 21, 2006 Author Share Posted February 21, 2006 This is the thread where my info came from MtC http://pforums.company-hosting.com/forums/showthread.php?t=67200713 Quote Link to comment Share on other sites More sharing options...
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