My first MS3

[DaveEFI]

Just about to build my first MS3, for myself. Have built dozens of MS2.

It will be doing sequential injection on my Rover V-8, and I'm intending converting the existing EDIS to MS drive wasted spark. Unless I can be persuaded it is worth the considerable extra cost of going sequential ignition too?

Other question - is there any point in fitting the V3 board injector drivers, or should I just keep the components as spares for repairing other boards that use them?

[jsmcortina]

I always install all the parts. Those two channels could be used for something else down the road? It also keeps the Megasquirt more standard.

EDIS can be used with sequential fuel on MS3.

James

[DaveEFI]

I always install all the parts. Those two channels could be used for something else down the road? It also keeps the Megasquirt more standard.

EDIS can be used with sequential fuel on MS3.

James

I'm not too worried about keeping it standard as it's just for me.

Interesting that EDIS can be used with sequential injection - that would certainly cut down on the alterations needed.

I am working my way through the MS3 documentation - a page at a time.

[DaveEFI]

I always install all the parts. Those two channels could be used for something else down the road? It also keeps the Megasquirt more standard.

EDIS can be used with sequential fuel on MS3.

James

Going cross eyed reading the manual, but can't find a reference to using EDIS 8 with sequential injection. Does it require any hardware changes - or software? Think I'm now happy enough about the cam position sensor to the expansion board.

[jsmcortina]

In the EDIS section of the Hardware Manual.

James

[CMac89]

I always install all the parts. Those two channels could be used for something else down the road? It also keeps the Megasquirt more standard.

EDIS can be used with sequential fuel on MS3.

James

Going cross eyed reading the manual, but can't find a reference to using EDIS 8 with sequential injection. Does it require any hardware changes - or software? Think I'm now happy enough about the cam position sensor to the expansion board.

Hi Dave,

EDIS just controls the ignition portion, which is waste spark coil packs. I think James is trying to get you to read to understand, but FWIW you use the MS3X for the cam signal input and full-sequential injection outputs.

Symtech Labs (when they existed) was able to delete the need for the EDIS by something they did to the internals, so I'm not sure how the EDIS is phased in. Should be as simple as selecting EDIS in TunerStudio.

[DaveEFI]

It'll probably become clear when I get the thing built and the code loaded so I can what's what on Tuner Studio. What's confusing me is that with a missing tooth crank wheel, MS will know the crank position, and the cam position one then tells it which actual cylinder is on the firing stroke etc. But EDIS just sends effectively every firing pulse to MS?

[jsmcortina]

It'll probably become clear when I get the thing built and the code loaded so I can what's what on Tuner Studio. What's confusing me is that with a missing tooth crank wheel, MS will know the crank position, and the cam position one then tells it which actual cylinder is on the firing stroke etc. But EDIS just sends effectively every firing pulse to MS?

Yes. The cam tooth needs to be phased before the crank pulse for cyl#1. So the cam tooth gives you phase and cylinder number.

James

[DaveEFI]

Right - think I've got that. The cam position gives a near enough and the EDIS unit the exact firing position within that window?

I'd geared myself up to changing to direct fire wasted spark - but since EDIS has worked impeccably here it would be good to keep it as is. As well as less work and cost.

[DaveEFI]

MS3X bits arrived, no thanks to the UK side who took 10 days to deliver after it had landed.

But all built and looking good.

Can I just confirm with EDIS, single tooth cam sensor for sequential injection the basic settings in ignition options/wheel decoder should be EDIS, single coil, MS3X spark, MS3X cam in?

Can't seem to find the exact settings anywhere in the manuals.

Other thing is can I configure my JimStim 1.5 to give EDIS plus single pulse from a cam sensor? I have a spare inlet anf plenum complete and would like to get everything working on the bench before fitting to the car - as much as possible.

Last question - the new fuel rail I'm using includes a temperature sensor. Is that of any use with MS3?

I seem to be using the one configuration there's not much information on.

[jsmcortina]

Try "8/1" 3,4,7 ON

Those settings look ok.

James