I assembled the JimStim simulator during winter break. I feel a lot more confident on soldering the actual board now. It went together easily.
I was just reading about how to use the Mega Squirt II to go sequential injection. It was confusing because they discontinued the DIYPNP part that most the literature talks about using to go full sequential for a 4 cylinder. Just so we don’t feel bad they discontinued all of the plug & play except one (DIYPNP Nippon Denso N76; a 76 pin plug). Good news for my 1st gen Probe GT. (Not really). It is only intended for use with MicroSquirt Module based devices like the DIYPNP. They still sell the add on board for the two additional drivers: SKU: DP_SEQMOD-K. It would do Swift owners no good unless you were planning on running MicroSquirt and found the part bellow for cheap to run with the additional driver kit above. This would be the route for a the cheapest sequential budget build. It doesn’t even make sense because the two are like an oxymoron. You don’t go sequential injection for a budget build. DIYAUTOTUNE did archive the info for this.
This is the part for are Suzuki Swift:
DIYPNP N52 (Nippon Denso Style 52 pin)
Part# DIYPNPN52-K (DISCONTINUED)
However upon further reading not too buried but buried enough to make someone think that you couldn’t go sequential injection with MS2 and would have to buy MS3 is the information for reconfiguring the MS2 board for sequential injection for a 4 cylinder.
“This code is based on the MS2/Extra code 2.1.0 and is part of the alpha 3.0 version. It can perform sequential and semi-sequential injection and allows the use of 2 additional injector channels. It requires a small modification to the MS2 card to make use of the additional injector channels as shown here. All the other code features are the same as the current MS2/Extra code so the corresponding documentation should be used to configure those.”
“The code will do sequential injection for engines with up to 4 cylinders (with the additional injector channels) and semi-sequential injection for engines with up to 12 cylinders. The number of injection pulses per engine cycle is automatically computed by the code based on the number of cylinders, the number of injector channels, the presence of a cam sensor, and the use of staged injection. Sequential injection has a single injection pulse per engine cycle and semi-sequential has up to 6 pulses per cycle depending on the configuration.”
This means for the most part you don’t need MS3 unless you want sequential injection that is already built into the board that is already assembled. You would not want to purchase the assembled MS2 board because it is not easy to change anything on it. The assembled use the v3.57 board’s major claim to fame is it’s ‘surface mount (SMT)’ design and not through hole design. If you know for sure you are going to use sequential injection with 4 cylinders buy MegaSquirt-II Engine Management System with 3.0 Main Board – Unassembled Kit; Part # MS230-K_m4 (4 bar map) built in map sensor or MegaSquirt-II Engine Management System with 3.0 main board – Unassembled Kit with Black Case; Part # MS230-K . Use the above configuration as your building the board and then you don’t have to remove the unnecessary parts.
What does MS3 give you?
The MS3 also gives you a starting point for even more expansion. You will be able to connect the headers on this board to additional hardware, such as the MS3X board to enable features like these:
8 channels sequential fuel control (we don’t have 8 cylinders)
8 channel sequential ignition control (we don’t have 8 cylinders)
Individual fuel and spark trim for cylinder by cylinder tuning ( I believe this available for the 4 cylinders on the MS2; not sure)
2 and 3 channel PWM IAC control ( this is an add on mod kit for the MS2 3.0 board)
2 stage nitrous controller (you can add nitrous controller to MS2; not sure if it is 2 stage)
Table switching for multi-fuel engines
2 step launch control (you can add launch control to MS2; not sure if it is 2 step)