So with ms3 you dont need the pull up resistors on the LED. But you still need to add the the vr sensor for stock cas.

 

Incorrect, the ms3x board has the 2nd trigger conditioner.

 

ahh that is awsome. I need to order one now. Just checking so with ms3 there is not much to do to make it run rx7 then. As far as board mod go. Right!! And could explain a little on timing for sequential injection for the rotary. Sorry to high jack thread.

 

I split the thread.

You should not need any mods at all.

What do you want to know about the timing?

Ken

 

Well with sequential dont you need to tell it when to fire. I thought sequential would be like spark timing but for fuel. Or am I mixing that with direct injection. Thanks for spliting the thread too

 

Yeah you'll need to set the inj timing. I think I have mine around 135 but I'm not 100% sure. I'll have to look.

I was in the process of fine tuning it when I broke it.

Ken

 

any chance of megatune support for ms3 or ms2 extra 3.0?

I'm a 0% fan on tuner studio. No offence to the dev for that project. Just not my thing.

 

I can't guaruntee it since to do that I would have to stop writing MS3 docs and firmware code for a bit.

That said, I will be rewriting comms in the MS3 code for 1.1 and may write some MT code to prototype the PC side.

Ken

 

Hey Ken, cheers for the reply.

I've gone through tuner studio a bit. The whole suite looks nice. There is a serious amount of features in there. At this stage I think I just want to keep my MS2 going.

Is megasquirt 2 ever going to work with 4 sequential injectors in rotary mode? I read something about not enough timers can you elaborate?

Also can you explain why there is are two dropdown menus as follows.

Firstly the choice between FC and FD ignition modes, and then later RX-8 mode enabled or disabled. To me it would make sense to label them FC,FD and RX8 in a single menu. As I understand.

FC = Wasted spark leading, trigger and select for trailing coil
FD = Wasted spark leadng, 2 independant trailing coils
RX-8 = Sequential coils, 4x

Make sense?

At this stage one of my mates with a primitive Microtech model came for a drive and was impressed by the smoothness and tuning capability for $252USD. In his words if I twist his arm and tell him it will work I'll be setting his car up with one.

 

The timers that are used to run the secondary injectors are the same ones used for trailing ignition. On MS3 we have 24 timers in one form or another, so no problem there.

Mainly because doing it the way I did allowed me to more easily reuse the FD mode COP trailing (didn't have to change trailing code at all) while using the rx8 mode setting to make leading use 2 COP outs.

Cool, always good to win another user. So you know, MS3 was noticibly smoother still compared to ms2/extra even in upgrade mode. In seq mode I was surprised I thought the MS2 was smooth before! It is a pretty good bit more expensive though. James and I are spending a good bit more time on it too.

Ken

 

Power was ~399BHP/331.5rwhp/248.6rwkw.

In the land of fake ******* and next top sperm lockers you would call that 400rwhp SAE

 

Hey Ken,

Does FD mode with RX-8 mode work properly yet? I was reading there were problems with spark outputs B and C not going as planned. Can you explain what you have personally tested, and what is maybe not 100% yet?

So it is possible to setup a twin rotor car using 4cylinder mode for ignition, with leading only wasted spark on MS2e3.0 and then use 100% sequential fuel injection?

I'm about 0% keen on being a beta tester for ms2e3 or ms3 at this stage. Haha if you want me to be the poor sod with the car that runs like *** you'll have to arrange for me to get sent an ms3 card. I remember what happened last time I was using working code.

 

It looked fine on the bench last time I looked.

Maybe? It will probably work but I have never tried it.

I don't remember. I can say I have been using MS3 in upgrade mode on the rx7 for more that a year, and in ms3x mode for a few months without issues with how it runs.

Unfortunately, I would have to buy you the MS3 to send it for free. We have had 2 alpha/beta test ms3s for more than a year on rx7s so the rotary is pretty well tested.

Ken

 

So you are figuring a 20% drivetrain loss ? That's a little excessive don't you think?

 

I work on 17%. 17% for tyres, differential axles, gearbox. Clutch. Tailshaft mass.

I think thats pretty honest.

 

Fair enough ken. For me to buy as a buyer, I'll be waiting about 2-3 years to get confidence everything will be right. Also tuner studio doesn't do it for me.

 

Regardless, impressive rwhp no.s for a 12a running a v-trim S5 hybrid with unclipped exh. wheel. What amount of boost was that at?

 

backpressure gets big in top end. Enough to drop boost from about 220kpa to 190kpa and keep falling. I have 1.3 bar springs in my wastegates.

190kpa abs manifold pressure around 7200-7400rpm.

I'm prepared to add a touch more wastegate spring tension and then retest, and then try to bleed off some intake pressure to wastegate and retest.

 

And don't worry I'm going to keep developing the setup for years to come.

I am going to move injection points, try an intake designed to pick up midrange. Add turbine flow, bigger injectors. Better dump pipe and turbine wheel to support more flow at lower backpressure.

 

Tunerstudio's main problem right now is comms. We're going to fix that by making the comms routines more robust with noise issues and bad commands. 90% or more of the people using it however don't have any problems.

What problem were you having with TS?

As far as the MS3 code itself, aside from the new features most of the code is the same as ms2/extra, and even then most of the new code has had over a year of testing.

Ken

 

Java in a real time app

Don't get me wrong, java is PERFECT for MegaLogViewer. But for MegaTune/TunerStudio


To complete absense of keyboard shortcuts for me to hit whilst operating a 400hp motor vehicle on the dyno and filling a fuel map at the same time.

Your other problem is at the same pricepoint Haltech Sprint RE 500 looks awesome. Its only $939AUD inc a usb cable and tuning software. Same resolution. All the features I want are already present.

And then I have a megasquirt 2 to sell. A megasquirt 3 upgrade kit will cost every part of $400AUD, and another lost ~$300AUD to not selling my megasquirt 2. True cost of sprint is only $240

 

I may be mistaken but isn't the Haltech made in Australia? That would explain the price being better there.

In the US I'm pretty sure the MS3 complete system is still significantly cheaper.

I'm not sure I totally agree on the TS part... it doesn't sound like it being Java should cause it to be unusable (I use it on a regular basis without problems). It being Java also lets the same software to run on my Mac, my linux box, my FreeBSD box, and my Windows box with no porting effort.

It does have some hotkeys, but if you want more, you should bring it up with Phil. He will probably add them.

Ken

 

For new sales its priced right. Its a real pity MS2 is dead end without the hardware to do sequential.

 

You must be using the same weird math figuring on the sprint RE vrs. MS3 as calculating your BHP figures.

Apart from the seq. injection there's nothing special about it, you only get 2 programmable outputs. I don't see any mention to control the EMOP,which you would think would be included in a "RE" specific version on an aftermarket ecu.

I'm curious what real advantage you think you're going to get using seq. injection on a rotary, does that old FB need to pass stringent emissions?

From the looks of it haltech is trying to compete against the megasquirt with that offering. The only problem feature wise and I'm guessing resolution wise, it can't hold a candle to a MS3/3X. it must at least be a "fully polished product" then?

 

The advantages of using seq on a rotary are more or less the same as using it on anything else. If you do it right you get better throttle response by injecting at a time that will cause better vaporization and cause the most up-to-date fuel calc to be used for each injection.

In my case I was able to use less fuel in the cruise and idle areas and ended up with a smoother running engine too.

Seq also gives you the ability to trim per-cylinder/injector if you have the ability to measure the difference.

Ken