Nissan 370Z Forum - Vit's FI TT 370Z Lives!

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Quote:

Originally Posted by VitViper (Post 3556192)

Took the car out for a good hit today, just running 7psi to stay under the limit of the fuel pump lol. It's a whole new car -- response is better, boost comes in much better (to the point I gotta dial it back a bit).

http://blog.vittuned.com/wp-content/...otec/boost.png

So nice to have true closed loop boost by gear!

The knock control is great, I honestly have the threshold too tight right now since I'm experimenting and making sure it all works well.

http://blog.vittuned.com/wp-content/...ec/knock_4.png

I'm also using the lateral G's coming from the ABS/VDC to trim the traction control -- so as you pull lateral G's the system hunkers down, works great!

http://blog.vittuned.com/wp-content/...ction_trim.png

One of the challenges of the VVEL motors using a VE based system -- making sure fueling is correct as it can vary DRASTICALLY based on the VVEL target (even based on TPS vs VVEL at points). It's a fantastic system -- I love it. I've found I can set VVEL targets that make just enough power to just cruise down the high way, but even if you floor it (100% TPS) the car won't accelerate or barely creeps, LOL.

But back to the fueling -- you can literally spend hours upon hours to get it all "right", but I don't want anyone to spend that much fiddling with it, so I've already done most of the work in dialing in the VVEL comp tables.

http://blog.vittuned.com/wp-content/.../vvel_comp.png

But this still won't be 100% perfect, and me being really picky, I want it perfect -- so what do we do? I programmed the ECU to learn, either while you're on the dyno or just driving the car, then it applies the learned VE trims and you have spot on fueling. You can disable learning once you're happy with it and only let it apply (IE for long term in case your lambda sensors fault, you don't want the learned tables skewing anything).

Yes it retains the learned data between engine key cycles, it's flash backed ;).
http://blog.vittuned.com/wp-content/...vvel_learn.png

Man this is way more than I need but way cool!!

So is this your own stand alone unit you made or modifying another stand alone? Really cool system, reading more and more about tuning and stand alones in general and it's pretty amazing what can be done now.

Quote:

Originally Posted by Jhill (Post 3556251)

It's a MoTeC M1 ECU. The ECU's are just blank hardware when we buy them. I write the firmware we use (the code that runs the ecu) to suit whatever application we're working on-- which is part of what allows me to integrate VVEL control, the factory Nissan CAN bus data, etc.

I already have firmware out for various Honda B series, K series, F series applications, 06-15 Honda Civic Si and R18 applications. As well as the Toyota 86 platform, now the 370Z stuff. Next on the plate is the Evo 8 & Evo 10, as well as a new 15+ Mustang.

Ballpark price on stand alone?

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3000-10000. Syvecs s6 unit should also fall inbetween that price range.

Quote:

Originally Posted by Elmo370z (Post 3556379)

3000-10000. Syvecs s6 unit should also fall inbetween that price range.

6k+, retail on an M150 is $3770. I'm familiar with Syvecs, however I don't see them having a full drop in replacement ECU for the 370Z with VVEL control, CAN BUS programming, cruise control, working fuel economy meters, etc. Any ECU targetted at a 350Z *will not* work on this car. An S6 unit also will not run everything on a 370Z -- it's only got a single lambda, single knock input, etc. It's a very basic ecu.

Borrowed a buddy's Go Pro, took the car out for a spin. You can see/hear the traction control logic at work.

https://www.youtube.com/watch?v=ykO6e4L7trY

I <3 how the car sounds with the F/I kit & exhaust.

That is great work with one bad axx ECU.

Cranked it up a bit yesterday, the boost by gear doing work!

http://blog.vittuned.com/wp-content/...otec/boost.png

I think with proper tuning 14psi or so isn't out of the picture on 92-93 octane fuel. This should be about ~600whp or so on pump gas.

Couldn't do it before due to the clipping point of the stock mafs.

Fun little gimmick that I programmed in the ECU -- power estimate based on accelerate rate (of non driven tire, so no wheel sleep problems here). Obviously instantaneous accel is kind of "jittery", so you can factor it to "smooth" it, I'm using too much in this example, and it got a smoothed graph that looks nice, but very very low ball values compared to instant, hah.

http://blog.vittuned.com/wp-content/...powerchart.png

And here you have it folks, worked out the fuel pump (fixed itself?) and replaced the cam sensor. Making some great power on good ol' 92 octane fuel.

http://blog.vittuned.com/wp-content/..._92_oct_nw.png

http://blog.vittuned.com/wp-content/...re_of_car.jpeg

Cruising down the highway with no vacuum in the manifold at all, no problem.

http://blog.vittuned.com/wp-content/...tec/cruise.png

Great still getting 22-26mpg depending on weather (was getting 22mpg in the rain with a head wind, not bad at all lol).

http://blog.vittuned.com/wp-content/...c/flexfuel.png

Welcome to true flex fuel logic. No analog converters here -- we run the content sensor directly as the digital signal it is, to not only get flex content, but fuel temp from it as well. Going to need a fuel system upgrade from @phunk soon I'm sure, as my fuel system is pretty tapped out as it is, lol.

Quote:

Originally Posted by VitViper (Post 3568069)

Welcome to true flex fuel logic. No analog converters here -- we run the content sensor directly as the digital signal it is, to not only get flex content, but fuel temp from it as well. Going to need a fuel system upgrade from @phunk soon I'm sure, as my fuel system is pretty tapped out as it is, lol.

I like that.. sucks having to buy an E85 content gauge kit just to get an output to use with the ECUTEK.

Quote:

Originally Posted by phunk (Post 3568080)

I like that.. sucks having to buy an E85 content gauge kit just to get an output to use with the ECUTEK.

In the past I would just use the analog converter boxes without the gauges. I HATE gauges, I feel like they clutter up the car and are absolutely useless (boost/afr/content, etc -- who can really watch them when you're hauling ***?)

The stock ecu has a lot of limitations... 10hz output for boost control? eeww, so bad, lol. And the amount of inputs for extra stuff is extremely limited too.

That's cam ghosting?

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