brillo

Ken is the man

Now RG and I need a MS2 box to test it, as we have a harness for my car already.

turbosa22c

ms2? looks like i gotta go out and build one!

muythaibxr

Nobody else is interested in helping test?

rotarygod

I'll call you when I get a chance Ken. I just started a new job and I've been pretty busy lately.

MazdaManiac

iTrader: (3)

I am extremely interested, but time is a premium at the moment as well.
I plan on building an MSII in August.

muythaibxr

Alright, cool.

James and I really want to see how it works out.

Ken

rotarenvy

how does the megasquirt handle the fuel pump? dose it take control or is it left to the std management?

from reading the tread it seems like a true TPS signal was never found, only a wire that would do transient throttle response.

most aftermarket stand alones need a 3 wire variable resistor TPS input. would 1Q 1J and 2F on the attached diagram give this?

rotarygod

MS has the option of running with or without a TPS. There are 3 wires in the tps. A power, a ground, and a signal wire. The signal wire is the only one that is needed for the ecu. The RX-8 has this wire so it can be wired up both ways with no issues.

MS does not need to run the fuel pump. This can remain as it is. I wired up a friend's RX-7 without the fuel pump wire. We just ran it through a relay which sent power to it when the ignition was turned on.

rotarenvy

thanks RG.
would wiring the fuel pump to be on all the time work with the rx-8 since it has no return line?

MazdaManiac

iTrader: (3)

Wiring the fuel pump would be a good idea since the PCM decides (somewhat arbitrarily) when to put it in high.
I'd wire it to go into high every time the manifold pressure gets close to zero.

rotarenvy

most aftermarket engine managements only have the one fuel pump output and they don't go into much detail on when it turns on and off.

with the rx-8 there is two fuel pump relays. I guess one turns it on and the second takes a PWM signal and controls pump speed?

how do the emanage and interceptor get around not controlling the pump and not compensating for manifold pressure?

Longhornxtreme

Any news? I've been away ALONG time, I can't believe it's close to becoming reality. Thanks to RG and Brillo and Ken. If ya'll are ever up in DFW let me know.

rotarygod

I've been so busy that I haven't played with it. It should be able to be used in an RX-8 now though. It's just waiting for someone to verify it.

TeamRX8

iTrader: (25)

set your calendar to check back in two more years ....

MazdaManiac

iTrader: (3)

Nah, there are people running it right now. It works.
Whether or not it is a worthwhile endeavor at this point is the issue.

rotarygod

What's that supposed to mean? Lots of people run Megasquirts in their cars. The holdup has been getting it to work with the RX-8 trigger wheel and coils. That code has been written so it should work right now. Someone just needs to try it to verify it.

Jeff is correct in that there may not be much point in it anymore. If we are getting close to the ability to reflash the stock ecu, there would be no reason to use any other system before long. If someone were to do a Renesis swap into another car such as an RX-7, then it may make more sense. That's always been the thing about the Megasquirt though. It's a project ecu that's really intended for project cars.

rx7.5

Hi All

I've got a Renesis 4 port from a wreck at 2000 miles and a real clean 88 RX7/NA that needs a fresh engine so my RX7.5 project is about to begin and planning to use MegaSquirt.

Just started putting a MS-II V3.0 kit together now and there is an option to build the controller for either a stepper or PWM IAC. Can anyone tell me which one the Renesis uses?

Sane project? Probably not, but my last rotary went 210 mph at 12000' so I've done silly things before.

Thanks

Viich

rx7.5 - I'm planning a similar project with a Gen-1. Are you on Rx-7 forums? It's probably a better spot for a discussion.

ltrx8

Is this set up the same as ecu2 at Rotary Aviation..
link http://www.rotaryaviation.com/eficont.html

swoope

iTrader: (5)

you might pm brillo or rg.. as it is not active.


it would be faster..

and read the thread.

beers

rx7.5

I've got the Rotary Aviation (Tracy Crook) ec2 crontroller in my airplane. It works good for engine that runs pretty much constantly at a single RPM but It does not have most of the extra i/o for a civilized car install like TPS, Fast Idle, IAC, O2, Coolant Temp, Fuel Pump ect. that the mega-squirt has. This is based on the state of EC2 development as I knew it about 18 months ago I've not had a chance to talk to Tracy since the EAA thing Oshkosh 07.

swoope

iTrader: (5)

thanks for that.. what are they using as a crank trigger for the renisis??

beers

rx7.5

I'm pretty sure he's got the stock rx-8 CAS / wheel supported in the EC2

Viich

Hey 7.5, how's the project coming? My auto club is closed for the winter because of heating plant problems, so I'm on hold.

rotarygod

I plan on eventually installing a Renesis in my 1st gen RX-7. It will be controlled with a Megasquirt when I do. As far as the MS RX-8 project is concerned, it's dead. There's no point to it now. Especially not with the new prodcuts coming out that allow you to reflash your own ecu.

I am going to install a 1st gen front cover on the Renesis. That's where the motor mounts are on my car. I'm going to use a 2nd gen crank angle sensor so there will be no need to deal with the RX-8 trigger wheel. I'm going to load a base map for a 6 port 13B into it and then tune from there. It'll be pretty straight forward when I finally get to that point.