Reverant

iTrader: (10)

Do bear in mind that y8s is boosted - I'm pretty sure that while I had significant gains between 1500 and 400rpm, its wasn't more than 10-15hp at best.

Landrew

iTrader: (2)

I'm boosted as well. I feel like I'm making less power now that I have MS instead of my piggyback XEDE. Having VVT and midrange power back should help

Reverant

iTrader: (10)

Oh right.

NiklasFalk

iTrader: (1)

I don't seem to get the logic I thought I understood half a year ago.
But that's not uncommon for me, the issues become very real when you actually are performing the installation, instead at the planning phase...

Basic facts:

1. DIYPNP in a Euro 99 with the goal to be able to change the ECU to the stock one without any problems (i.e. no wire taps in the OEM harness etc).
2. Now a VVT engine that have got it's injector harness modified to include the ignition (so it plugs straight into the 99 harness, and runs).

So my plan is to add the VVTuner to the DIYPNP through a harness just between the DB15's (the OCV connection is made through a separate connector, since that's not part of the OEM harness).

Questions:

1. I anticipate that I should not connect the sensor 12V output from the VVTuner to the DIYPNP since the sensors already get their 12V from the DIYPNP. Correct?
2. Should the Sensor Ground form the VVTuner be connected to the SG in the DIYPNP or is this a good way to introduce noise?
3. Which is the best way to run the CMP and CKP in my setup, just tapping the signals to the VVTuner or run them trough the VVTuner (setups that runs on default settings are always a better option for me if there is no real difference)?

I have made a harness with a connector block for the five wires (CKP in, CKP out, CMP in, CMP out and Signal Ground) so I can figure it out (without soldering in the car), but it would be nice with some common wisdom.

I'll draw some ugly diagram if I can get anything to work tonight.
I hope it will run as before with longer wires if I need to just connect the CMP and CKP back to the DIYPNP, without the VVTuner, as a last resort.
Testing without the VVTuner should be the first test I think (so I know if any of my new soldering in the DIYPNP is flawed).

NiklasFalk

iTrader: (1)

Hmm, I figured out what setup that works for me.
Passing the CMP and CKP to the VVtuner and then taking them back (inverted) to the DIYPNP.
Signal Ground disconnected
12V from the DIYPNP main 12V
Ground (system+EMS) from basic DIYPNP GND

It started (only in this connection/option) but when i connected the OCV the VVTuner died (no signals passed through and no serial communication)...
I have 8 Ohms over the OCV and maybe there have been a short at some point (OCV connected through a flawed connector).

Have I bricked the VVTuner (the LED still lights up though), or is there someway to bring it to life again?

NiklasFalk

iTrader: (1)

The simple answer is to make sure it get GND and 12V...

I feed the 12V and GND out from the DB15 on the DIYPNP.
Shorting the OCV wires on the VVTuner apparently make it draw enough current to toast the solder-point -> DB15 trace on the DIYPNP board.
Choosing another pin and making sure not to short the OCV wires made everything work as it should.
Soldering the 12V and GND directly to the DB15 pins might be better.

Those of you who are able to read specs might have anticipated this (max current on the DB15 traces and max current draw on the VVTuner), but I was mostly focused on making it work as fast as possible

JasonC SBB

Does this thing work well? I helped Kevin Boswell architect the feedback loop some.

NiklasFalk

iTrader: (1)

I hope to be able to find out for real this year. But it was able to keep the cam timing in check last year, with stock cam & springs.
First race in late May, and I hope to be tune the new engine before the training on that Friday...

MX5RACER

I have used the VVTuner with some good results.

I wired the outputs from the CMP and CKP sensors from the jumper board in the DIYPNP to the DB15 plug along with power and ground. I then ran the CMP and CKP sensor outputs from the VVTuner (Inverted) back through different pins on the DB15 and connected them to the Input spots on the DIYPNP.