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

I have one, I need to MS it ASAP for a mate...

I'm trying to decide a) whether to go down the MSII route or stick MSI, b) whether to run with COP or to simplify life and run single coil or at most wasted spark and c) wondering whether anyone has interfaced with the curious cam/crank sensor arrangement (looks like multi-tooth crank and 3 tooth cam, with two teeth opposite and a sync tooth)?

Cheers all!

Hmm that doesnt sound promising, will ask around there and see then! May end up having to modify but was hoping to keep it stock in case other future solutions are required.

They have a rather irregular design on the camshaft position sensor trigger wheel, so this engine needs custom code.

The manual shows what seems to be a 12t, regular spaced crank wheel and a 3t cam wheel which has essentially a pair opposite each other and a sort of sync tooth near one of the two. I've not seen the real part yet though. Having spent months trying to nail the 24-2, 2*12-1 on my 3s-GTE I'm feeling dread.

I am running this exact engine, batch mode, on Microsquirt. Running batch so cam signal required. I am using the stock coils in wasted mode using a EFISource ignitor. Also running a prototype Synchromap but you can also use alpha-N at idle.

What I did was file off one of the 12T on the crank sprocket. I did it on the engine, I make a seal out of plastic and duct tape to keep the grinding out and used a Dremel tool. Took 2 minutes to remove the outer cover and a minute to do the grind.

I have helped several FSAE teams using this motor and this setup works well. In fact the USNA did a study last year comparing Microsquirt in batch mode with another aftermarket EFI running in sequential mode (they used the cam sync but ground off two of the nubs to yield one pulse) and HP, TQ, timing were the exact same.

- Bruce

I have an Idle Air Valve from a CBR600RR. Do either of you know if its just a 12v on/off, or if it supports PWM?