Megasquirt Components
Turbo Mini Forums

I am ready to make a purchase from DIYAutotune and I know I have asked before, but I never put an actual list together before.

Initially I am only mimicing the Rover MPi and want to use as many of the Rover sensors as possible, so the basic standard MS II should work. I added the two coil driver kits and the VR board. I thought they sold Jean's VR board but I cannot find it on their site now.

Has anyone used their relay board? They say it is weather proof under the bonnet, but it looks exposed and vulnerable to me. My initial setup is just for bench testing, so I am wondering if it will make trial connections and power setups easier.

2 x Bosch BIP373 Coil Driver Mod Kit

1 x MegaSquirt-II Programmable EFI System PCB3.0 - Kit w/ BLACK CASE

1 x Innovate Motorsports LM2 with dual O2 sensors - 3807

1 x Zeal Engineering Daughterboard with Dual VR Conditioners

1 x JimStim v1.5 MegaSquirt Stimulator w/ Wheel Simulator -Unassembl

1 x Performance Fuel Injection Systems - HP Books

Thanks for the input

In the same order....

To use all the Rover sensors, first point, the MS2 "should" work with the rather unusual crank signal from the back of the MPI flywheel but I don't know if anyone has actually tried that selection within the code on a real engine. The option exists and the JimStim can mimic both it and the SPi flywheel but you may be the first to try it for real.

2 coil kits, yes, but the MS2 kit would normally have a single BIP373 (or equivilant) in it so you should be able to sort out a discount....

You need the additional VR input because you want to use the MPI cam (phase) sensor so, yes, you need to buy a seperate conditioner board. Those of us over here have no experience as we use opto or hall switches so can use the standard MS2 parts but if you want Jean's one it's available on his website. (It's a new version, see link at the bottom of this page http://www.jbperf.com/dual_VR/index.html )

Relay board, I'm not sure what the others over here did (we all did it differently.....) but I made my own exactly as it would be in the car but just with longer cables for bench testing. Then when I installed it in the car all I had to do was shorten the cables. You certainly ought to make up something robust and with relays/fuses even for bench testing as you've got some high currents (fuel pump), high voltages (coilpack), all adjacent to high pressure fuel.

Re. the list, I've given my thoughts above except for the LM2..... hopefully Paul will read this as he has experience of the LM2 (I used TechEdge for the duals and I think Graham used two LM1s).


(edit - spelling)

EDIT 2 - Just a thought...... If you are only mimicing the MPI setup at first, and/or intend long term to use high z injectors (like the MPI ones), nearly half the components on the MS2 build are redundant and you would be better building it without all the standard injector drivers but instead using Jean's 4 channel driver board http://www.jbperf.com/quad_ign_inj/index.html which not only deals with the injectors in a much simpler way but also covers the coil drives on the same board.

Edited by Rod S on 23rd Nov, 2010.

Schrödinger's cat - so which one am I ???

I've not used the LM-2. Mine was an LM-1 and life has been much simpler without it.

Apart from the unreliability of the serial connection, it was difficult to mount so that you could actually read it. It also needed the use of Logworks to log the data. When we did eventually get Logworks to read data from the MS, a lot of it was incorrectly scaled.

Once we fitted an AEM wideband instead and fed the 0-5v output into the MS then we could just log everything with Tuner Studio. We now use two AEM gauges and have no problems.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

It looks like DIYAT has partnered with Jean and have their own version of his board:
http://www.diyautotune.com/catalog/diypnp-...b8e30318d7f1729

Or maybe this is a different one altogether...

Then I found this note at the bottom:
Note: This is not intended for regular MS2s, only DIYPNPs and MicroSquirt Module items.

Edited by tmsmini on 23rd Nov, 2010.

I'll let Jean comment direct (if he sees this thread) but that little board is not for the MS2 build but for the DIYPNP which (I think) is based on MicroSquirt, not MS2.

So I'm not sure it can run the siamese code ???

Also, I don't think the DIYPNP has the Rover inputs ???

Sorry, my limited knowledge is limited to MS2 :)

Schrödinger's cat - so which one am I ???

Yes, that's a board I designed and make and it is specifically for the DIYPNP and the Microsquirt module since it only has 2 injector drivers. The module only needs 2 additional drivers to have the 4 drivers since the on-board drivers are the same simple drivers. And you don't need to do any modification on the module to have 4 channels as opposed to what is needed on the MS2 card.

And the module will work with the siamese code so the DIYPNP will also work but it is designed as a plug-n-play for the OEM wiring loom. So if you have the Rover connector and there is a corresponding DIYPNP model (which I don't think exist) then you could use one. Otherwise you'd need to use one of the available connectors or go with a standard MS2 modified accordingly.

Jean

http://www.jbperf.com/

So it is more of a question of what not to buy, if I use your two boards Jean.

A partial kit and some additional components. I don't have a problem buying the complete kit and leaving off what I don't need, but how will I be sure of what to leave off?
Terry

You only the four injector drivers if you are expecting more than 120hp, otherwise the standard drivers will suffice as will the two ingition drivers.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Schrödinger's cat - so which one am I ???

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

I was thinking more of the assembly time saved by using the 4 channel board.

I agree the price difference between a "full" kit and a "partial" kit plus components is small compared to the time invoved in sorting out a BOM (although it would be a lot easier/quicker in the USA using DigiKey without the additional charges we get, compared to sorting out a Farnell BOM like I did) but Jean's board is so much simpler than assembling a complete MS2.

I think buying the full kit (but not using all the parts) and also buying Jean's board to use for injection/ignition would be the most effective timewise and leave the options open for staged injection, COP/CNP etc. in the future without having to waste any part of what has already done.

Schrödinger's cat - so which one am I ???

Thank you Paul and Rod. I really appreciate your posts. I used to order from Mouser and Digikey when assembling camera and flash triggers, but a car component is a whole different level. I am sure I will have more questions as I start the build process.

Well I guess I am committed to making it work now. ordered on Wednesday and arrived on Saturaday with Thursday a national holiday.


I still need to order parts from Jean, but I will do that this week. Unfotunately I am away at a conference for work all next week. I don't think the hotel would like me setting up a soldering station in the room