ITT: VVTuner "piggyback" wiring for stock (or nonMS) ECU - Miata Turbo Forum - Boost cars, acquire cats.

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Old 10-25-2012, 04:07 PM   #1
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Default ITT: VVTuner "piggyback" wiring for stock (or nonMS) ECU

Quote:
Originally Posted by hustler View Post
Who installs a VVTuner stand-alone and why would anyone want to?
Quote:
Originally Posted by Ben View Post
VVTuner is sometimes used on swapped cars running non-MegaSquirt management (including stock).
Quote:
Originally Posted by hustler View Post
Can you run VVTuner on a non-vvt OEM computer and get an increase in performance without destruction?
Quote:
Originally Posted by shuiend View Post
Yes.
Quote:
Originally Posted by Ben View Post
Yes. You leave some on the table compared to a standalone, but a NA6 with VVT swap, stock computer, and standalone VVTuner will make substantially more torque than stock. With the same swap but without VVTuner, you leave a huge amount of torque out of the mid end. A standalone can still mean 10+ ft lbs down low and 5+ hp up top (on a stock engine)
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Originally Posted by EO2K View Post
Thanks Ben, but this was literally years ago so no worries. It wasn't until today that I even knew this would work with the stock ECU as your site does not explicitly state this.

(Note: I haz correct boomslang and would pay one of you goobers to build an interface harness. PM me)
Quote:
Originally Posted by Braineack View Post
buy a boomslang.us patch harness and do it yourself, it would be hella easy. Or PM me.
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Originally Posted by EO2K View Post
I'd love to do it myself. I can solder wires together and I can mount through hole components, I just have a hard time with wiring diagrams without really specific instructions.

I'll stop crapping up Hustlers thread and start my own. With blackjack, and hookers, and stupid wiring diagram questions. ...or expect a PM
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Originally Posted by Braineack View Post
i could draw you an easy to follow picture. we are talking splicing 15 wires, and maybe cutting 2.


Ok Brain, I'm crazy and stupid enough to try this if you don't mind spoon feeding me an "easy to follow picture" along with configuration information for sensor passthrough that will work for a stock ECU.

Let's make this easy and assume we are putting a BP6D head (or complete engine) on to a BP4W block or into a 99/00 chassis with stock wiring and NB1 ECU (or DIYPNP/MSPNP2 for a NB1) and we are starting with a Boomslang harness:



And a DIYAutoTune VVTuner piggyback harness:



I understand that the VVTuner can convert the signals from NB sensors for NA ECUs, but lets not go down that rabbit hole quite yet.

If I get time to actually assemble all this stuff, I'll try to dyno it with and without the VVTuner hooked up and see what we get. It would be nice to get some solid results, even if the sample size is just one I know IcantDo55 and JETSWU87 are bother running VVT heads on 99/00 ECUs, so this would be relevant to their interests as well.

Thanks Brain!
Attached Thumbnails
ITT: VVTuner "piggyback" wiring for stock (or nonMS) ECU-putyourheadonmyshoulder.gif   ITT: VVTuner "piggyback" wiring for stock (or nonMS) ECU-3pu1so.jpg   ITT: VVTuner "piggyback" wiring for stock (or nonMS) ECU-bender_poker_by_futuramaclub.jpg   ITT: VVTuner "piggyback" wiring for stock (or nonMS) ECU-slurm_and_hooker.png   ITT: VVTuner "piggyback" wiring for stock (or nonMS) ECU-extension.jpg  

ITT: VVTuner "piggyback" wiring for stock (or nonMS) ECU-vvt-piggy_med.jpg  

Last edited by EO2K; 10-25-2012 at 07:39 PM.
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Old 10-25-2012, 06:11 PM   #2
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ill draw something tomorrow.
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Old 10-25-2012, 10:04 PM   #3
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In.
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Old 10-27-2012, 09:18 PM   #4
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Last edited by EO2K; 10-28-2012 at 11:38 PM.
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Old 11-13-2012, 05:11 AM   #5
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crickets
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Old 11-13-2012, 10:30 AM   #6
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maybe tomorrow. Im stuck in a paradox.
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Old 11-13-2012, 01:35 PM   #7
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ITT: VVTuner "piggyback" wiring for stock (or nonMS) ECU-know_your_paradoxes2_9503.jpg  
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Old 11-15-2012, 10:04 PM   #8
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Also in
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Old 11-15-2012, 10:09 PM   #9
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ill draw something tomorrow.

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made me lol hard irl
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Old 11-15-2012, 10:25 PM   #10
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And my redneck co-worked just asked me "Who's that *** that ripped off that Garth Brooks song?"

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Old 12-11-2012, 03:43 PM   #11
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This looks pretty simple.

Here's what I'd do on a 99-00 running a VVT head on a parallel boomslang harness:

Cut the wires to 2H and 2J in half.

Connect Pin 1 to the ECU side of 2H
Connect Pin 2 to the ECU side of 2J
Connect Pin 3 to the harness side of 2H
Connect Pin 4 to the harness side of 2J
Connect Pin 7 to 1B
Connect Pin 8 to the PWM ground side of the VVT Oil valve
Connect Pin 15 to the 12v side of the VVT Oil valve
Connect Pin 14 to 3A or 3B


As far as I can tell, that's all there is to it. Reverant or someone else a little more versed in it should chime in here.
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Old 12-11-2012, 11:03 PM   #12
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"In"
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Old 12-12-2012, 03:47 PM   #13
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I'm putting a "diagram" together tonight and trying to find my Boomslang. I'll try to keep this updated.
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Old 12-12-2012, 03:49 PM   #14
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I have a diagram half done. hold on i started making it for a 01-05 and i did a face palm and just typed it out for you.
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Old 12-12-2012, 03:53 PM   #15
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Old 12-12-2012, 04:08 PM   #16
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I'm pretty certain it's as easy as this:

Splice into boomslang for power and ground.

Cut the crank/cam signals and route them through the VVTuner then back to ECU.

Run the two VVT Oil valve wires. You dont even need to run the 12v vvt one, if you power the valve in the engine bay.



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ITT: VVTuner "piggyback" wiring for stock (or nonMS) ECU-99-vvtuner.jpg  

Last edited by Braineack; 12-12-2012 at 04:30 PM.
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Old 12-12-2012, 04:22 PM   #17
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You need to add a ground to pin 9 as well. Otherwise the output emulation won't work.
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Old 12-12-2012, 04:26 PM   #18
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Quote:
You need to add a ground to pin 9 as well. Otherwise the output emulation won't work.
Red state post.
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Old 12-12-2012, 05:36 PM   #19
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Red state post.
You didn't think of that. Somebody else thought of that.
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Old 09-02-2014, 04:41 PM   #20
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necro bump. So what ever happened with this. Been trying to get vvtuner working with a stock 99 ecu. no success so far. Was using the instructions detailed in this link, https://sites.google.com/site/yourmi...r-installation

That failed miserably. Called DIYAutotune and spoke to some one and they told me vvtuner wasn't made to do what I want to do. And that I'd have to snip two resisters to disable the 12v pull ups. This thread and others make no mention of that.

In addition the link I posted shows running running 12v switched power to the two orange wires on the vvtuner harness, pin 5/6 and not just pin 9.

Any ideas?
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