MicroSquirt.com read only forum (Jan.15,2018)

Steve,

beautiful job.

you run a megasquirt unit, not a minisquirt (correct me if wrong). Why?

Why only fuel? Isn't possible to run the advance as well?


George

Angelo,

I am in Athens, Greece.

I worry about the position of the injectors, since they are originally on the head (??).

I have to double check, because the front wheel clearance is limited.

Note that the engine is positioned as close to the swingarm as she can be. I had to remove some material from the swingarm and the engine cases in order to fit the engine, but this is a discussion for another forum.

George

Hi George,

My family is in Greece, brothers in Athens and parents in Evia.

that can be a problem with spacing, because you have to use the injectors on top of the body like 1000rr so it will make the body even longer.
Body is 80mm long if you put the injector on top will add about 45-55mm depents how deep you install them.

Angelos

astrolt wrote:angelo any chance we could get those spec's in mm's. my honda needs 80-100-80 spacing. the gsxr bodies can be rearranged so the cables are in the middle & the injectors mount to the bodies.
angelo or smurph, can you send pix or links on the fuel pumps you have?

I will have to make better messering but in ruff converting is as follows:

(1) 84mm (2) 94mm (3) 84mm (4)

80mm heigth.
85mm overal width

Angelos,

The carb spacing it can be managed, but the length of manifolds is the problem. Suppose that is 40-45 mm in order to fit the injectors. That requires a 160-170 mm minimum clearance between the reed cages and the forks and/or wheel.

To much for me. I have to find another solution. Just give a day or two to work around the problem.

George

smurph wrote: ...
I also tuned the VE tables with a wide band O2 sensor. I also had heard that a wide band sensor would not work in a 2 stroke. But it does. At least it's lasted long enough to tune it. I'll report when/if it dies.

This bike is running. I mean, like it was fuel injected from the factory! It's quite possibly the first MegaSquirted RZ350 on the planet. Maybe even the first MegaSquirted 2 stroke motorcycle. If anyone knows something to the contrary, let me know.

Steve

Well, three years ago I was running an RZ350 for roadracing, and it scared the hell out of people. FAST, but ran out of gearing way too early. I had the T-Rex top end on it (450cc) long rods, etc. A couple of tapered 41mm TBs of my own design/manufacture.

I ran AN instead of MAP, your TBs are smaller and with the CV slide they probably help with the MAP, but mine just jumped too high too quick.

Your 02 sensor will probably last a while if you are running pump gas, it's not the burning oil that kills it, it's the lead.

I still think you got me on the first RZ part tho. I stuffed mine into an Aprilia RS250 chassis. Not really an RZ anymore. There have been other two strokes as well, seems a few snowmobiles and personal watercraft have been converted.

Question from a newbie for the 2-stroke guys here. I know MicroSquirt has a stepper motor control for IAC. On my bike, an RGV250 i would like to control the powervalve position as well, probably by stepper motor.

Is this possible with the IAC driver? I imagine any map for powervalve postion will require engine speed and load (TPS) inputs.

If I need the IAC output to get the bike idling, is it possible to add on any further stepper motor outputs to Micro or MegaSquirt?

I'm thinking of stepper motors to try and get good position control without resorting to closed loop control with a pot on the powervalve. Or can anyone tell me a better way to do this?

Any help would be great, thanks, Jon

jonpilbeam wrote:Question from a newbie for the 2-stroke guys here. I know MicroSquirt has a stepper motor control for IAC. On my bike, an RGV250 i would like to control the powervalve position as well, probably by stepper motor.

Is this possible with the IAC driver? I imagine any map for powervalve postion will require engine speed and load (TPS) inputs.

If I need the IAC output to get the bike idling, is it possible to add on any further stepper motor outputs to Micro or MegaSquirt?

I'm thinking of stepper motors to try and get good position control without resorting to closed loop control with a pot on the powervalve. Or can anyone tell me a better way to do this?

Any help would be great, thanks, Jon

While Megasquirt-II has a stepper IAC driver, on Microsquirt the stepper motor circuit is not there. It can drive an on/off or PWM idle valve, but not a stepper with the current hardware.

Dumb noob question: What about odd-fire? I'm looking to install MS on a V-twin ATV engine that is odd-fire. It looks like doing fuel only with microsquirt I can trigger off the coils thanks to the dual independent channels. That's great, but I'd like to grow into controlling spark too. Is this going to be possible with microsquirt? Maybe with a toothed wheel?

I'm cool with fuel only to start with. But if I can cobble together a turbo setup for drag racing (BIG if) timing control might be desirable.

If you have independent dual tach inputs, then odd fire should work fine because the phasing of the 2 inputs is controlled by how you phase the sensors relative to a common trigger wheel. If the 2 wheel sensors are on exactly opposite sides, then you have even fire, but if you move them closer or further apart you have odd fire. MS fires each channel independently based on the independenttach inputs.