VVT Controller
#27
Boost Pope
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Cilff's notes: fully tunable. You can download the software here: http://www.diyautotune.com/vvtuner/files/vvtuner.zip
Last edited by Joe Perez; 11-06-2010 at 01:53 AM.
#28
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Based on what reading I've done, my impression is that you don't have to do it this way. If you own an MS1, then yes, you can use the box to convert the NB signals to NA format. But if you have an MS2 or MS3, you can just bridge the raw NB cam and crank signals and feed them into the MS as usual, and leave the VVT controller's "NA" outputs disconnected.
When MS3 gets VVT support added in I might look into building the circuits I then need.
Edit: Joe I built my MS back in the beginning of 07 using the KingofLeet mods and then switching to your spark mods. So I am almost positive I would have to build the circuits to understand the NB signals.
#30
Based on what reading I've done, my impression is that you don't have to do it this way. If you own an MS1, then yes, you can use the box to convert the NB signals to NA format. But if you have an MS2 or MS3, you can just bridge the raw NB cam and crank signals and feed them into the MS as usual, and leave the VVT controller's "NA" outputs disconnected.
In my case I will like to continue to simply swap in the 99 OEM ECU when changing engines for annual inspection.
The whole VVT setup attached to the DIYPNP DB15 makes it real easy to connect (but I'm getting ahead of myself as usual, I don't need to startup until April).
#31
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Based on what reading I've done, my impression is that you don't have to do it this way. If you own an MS1, then yes, you can use the box to convert the NB signals to NA format. But if you have an MS2 or MS3, you can just bridge the raw NB cam and crank signals and feed them into the MS as usual, and leave the VVT controller's "NA" outputs disconnected.
#32
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From the little research I have done if I wanted to feed my MS3 the NB signals I would have to build an additional circuit onto my MS board to understand them. Since I am to lazy to order parts and build the circuits I will just use the VVT controller box to feed NA CAS signals to my MS.
When MS3 gets VVT support added in I might look into building the circuits I then need.
Edit: Joe I built my MS back in the beginning of 07 using the KingofLeet mods and then switching to your spark mods. So I am almost positive I would have to build the circuits to understand the NB signals.
When MS3 gets VVT support added in I might look into building the circuits I then need.
Edit: Joe I built my MS back in the beginning of 07 using the KingofLeet mods and then switching to your spark mods. So I am almost positive I would have to build the circuits to understand the NB signals.
So I guess in theory you could use an NA cas on the exhaust cam and the 01 cam sensor on the intake cam and be ok. Assuming the NA CAS output matches the NB crank output (and phase). It would just be weird.
HOWEVER, since I know Lars has both the NA CAS *and* the 2001 Crank wheel and VVT cam sensor... it's all moot.
#33
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I think i misread and then reread, but you are currently using your NA CAS for your MS3, right? That definitely wont get you far with the VVTuner. It needs at the very least a fixed (cam or crank) primary signal and a moving (intake cam) sync pulse to calculate cam advance.
So I guess in theory you could use an NA cas on the exhaust cam and the 01 cam sensor on the intake cam and be ok. Assuming the NA CAS output matches the NB crank output (and phase). It would just be weird.
HOWEVER, since I know Lars has both the NA CAS *and* the 2001 Crank wheel and VVT cam sensor... it's all moot.
So I guess in theory you could use an NA cas on the exhaust cam and the 01 cam sensor on the intake cam and be ok. Assuming the NA CAS output matches the NB crank output (and phase). It would just be weird.
HOWEVER, since I know Lars has both the NA CAS *and* the 2001 Crank wheel and VVT cam sensor... it's all moot.
#34
Boost Pope
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Why is this, may I ask? On the Megasquirt, at least, I'd expect it to be insensitive to changes in the phase relationship between CMP and CKP, so long as CMP always stayed within a certain boundary between a given set of CKPs regardless of cam advance.
Or is that the problem? I've not studied the relationship between the CMP signals and the min/max advance settings of the cam. Do they actually cross over a CKP pulse depending on advance?
#39
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Here is a spreadsheet that has what colors go to what pins on the DIYAutoTune harness that they sell with the VVT Controller.
Pin # CCM Pinout Wire Color
1 CMP (CAM) Signal to EMS [Output] green/black
2 CKP (Crank) signal to EMS [Output] white/black
3 CMP (CAM) Sensor Signal Ground [Input] green
4 CKP (Crank) Sensor Singnal [Input] white
5 CMP (Cam) Sensor +12VDC [Output] orange/black I added black stripes on my harness
6 CKP (Crank) Sensor +12VDC [Output] orange
7 System +12VDC [Input] red
8 OCV Control [Output] purple/black I added black stripes on my harness
9 EMS Ground brown/black
10 Shield Ground (EMS,OCV)
11 Shield Ground (CKP/CMP Sensors)
12 CMP (CAM) Sensor Ground black
13 CKP (Crank) Sensor Ground black
14 System Ground black
15 OCV Control +12VDC [Output] purple
Pin # CCM Pinout Wire Color
1 CMP (CAM) Signal to EMS [Output] green/black
2 CKP (Crank) signal to EMS [Output] white/black
3 CMP (CAM) Sensor Signal Ground [Input] green
4 CKP (Crank) Sensor Singnal [Input] white
5 CMP (Cam) Sensor +12VDC [Output] orange/black I added black stripes on my harness
6 CKP (Crank) Sensor +12VDC [Output] orange
7 System +12VDC [Input] red
8 OCV Control [Output] purple/black I added black stripes on my harness
9 EMS Ground brown/black
10 Shield Ground (EMS,OCV)
11 Shield Ground (CKP/CMP Sensors)
12 CMP (CAM) Sensor Ground black
13 CKP (Crank) Sensor Ground black
14 System Ground black
15 OCV Control +12VDC [Output] purple
#40
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What does the input topology on the new controller look like? From the images, it's clearly all through-hole, which rules out the Maxim chips, but is it a dual opto circuit, an op-amp based design, comparators, etc? I can't make out the part numbers on the ICs from the photo which engled posted.