We're talking about a single point injection sytem, not port, so unfortunately upping the squirts per cycle is just that. No batch of injectors to fire, just one lol. The reason I was saying upping the squirts might help is because at the moment, as there is only one injector firing, I think there is enough of a lag between squirts that stomping the foot causes a lean environment until the next metered squirt. This is why I find accel erichment worse at lower RPM as opposed to high. Whereas if I upped the number of squirts there would be a shorter amount of time until the next metered dose was pumped in. Obviously at some point though the single injector wont be able to open and close fast enough before the next squirt is required. It's actually a moot point now because Damo and I are in the middle of doing a port injected manifold for it.

On a side note I did tune it using the autotune once I had it running reasonably close. It's great because you can set it to whatever percentage of correction you want to get a nice smooth curve. I really do like the DIY megasquirt as I learned a hell of a lot doing it but I do understand where you're coming from with regard to the resolution of the fuel maps. I wonder what resolution stock ECU's use.

There is firmware available (free) for the MS that gives you 16x16 tables. It also gives better resolution for injectors, from 0.1mS to 0.035mS.

Interesting Yeah, my brother has one he's playing around with ATM and I'm sure he'd be very interested in this. Any chance you have a link or know where I can get the firmware?

Imma keen to play one day

You're always welcome to get in on the brainstorming and tooling at Damos! If it's the actual tuning of the MS on the laptop your interested in I'll prob be getting in to that on mine in the next month or so. Not sure if Damo's running his yet.

Not yet, just got a new lappy though so i'm going to have another look at it over the weekend if I can find a USB/serial adapter.

Have you done any research to see if the injector can handle it? I did a heap when I first got my SPI and found that many different answers for the supposed injector flow rate that I gave up. I'm running mine non-turbo with a megasquirt ECU and I find I can't get the acceleration enrichment quite right as it is. This would be compounded with a turbo. Although I've not upped the squirts per engine cycle which would make it easier.

Hybrid - The mega squirt is a cool computer but it only runs a 12x12 map, so the resolution its the greatest. for example 12x12=144 tuning points, where my Haltech it something like 32x32=1024 tuning points.

i sized up the manifold on the motor and im not sure it will fit the turbo without having to move my power steering. Then im going to have to try to find room for the intercooler.

I might have to put this on the back burner until after Toperi

So wait up, you still don't know the flow rate of your injector? How'd you set up the required fuel in MS? Just guesstimated a injector flow rate?

To the OP, can you get your injector flow tested and get some figures for it? That would be a good starting point.

That's a good point JrZook, I did a lot of digging around and never found any specs for the SPI injector. I seem to remember guestimating my req. fuel based on the power output of the engine, as there is some info in the Megamanual which guides you through that.

Alternatively megasquirt has an injector test mode that you could use to run the injector at 100% duty cycle for say 15 seconds, measure the fuel that it puts out and multiply by 4.

Canberramav, sorry for the thread hijack!!!

I tested the flow ages ago when i did the injection, put i sorta forgot what it was. I had a calculator i use for setting base maps up on motors to get them running before they got tuned, when i started my tune i just used this to get a rough idea. My old tuning laptop died a while ago and i lost the details. I am doing some work on the zook this weekend, if i get a chance i will see if i can test a rough flow.
Out of interest, what figures did you get. 360cc/m rings a bell, but its been so many years and so many different cars i am probably way off.

Layto....