Bench testing the siamese code *** Updated code
Turbo Mini Forums

For those interested in bench testing, I've designed a small board to help scope the signals and ease the input of a 36-1 signal into the MS. This will also be useful when setting up a system in a car. You can have a look at my post on the megasquirt forum: http://www.msefi.com/viewtopic.php?p=161149#161149.

To have more explanations on the board have a look at the beginning of the thread and look at Jeff Corsaro's site to get an idea of the board functionality. My board is slightly different but you'll get the idea until I get my own web page set up.

I'm going to use this board with the stim but it could also be used instead of the stim if you use your own 36-1 signal (which you have to do in any case) and if you use a few potentiometers for the different sensors (coolant temp, intake temp, O2 sensor, TPS) or you could use actual sensors for testing.

Let me know if you're interested in a board.

Jean

http://www.jbperf.com/

Dave, are you really in South Park, CO? if so im only 85 miles away in Denver, mabye I can help out with the testing

"sorry, Jedi mind tricks don't work on retards" Mediocre Films 2008

BOING!!!!

Jean,
I need one of these - but will need a 'shopping list' from digikey aswell...

Tell me your paypal

Dave, pm sent.

For those who want more info: http://www.jbperf.com/signal_interceptor/

Jean

http://www.jbperf.com/

nice to see your alive chap, wondered where you had gotten too :)

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

Hi Peter,

Glad to hear from you!

It would be good to continue with the V3.0 PCB. It would simplify things a bit. However, I could use my v2.2 board with the other MS2 so if you want I can ship your ECU to you.

When do you think you'd be able to start testing? The current code is based on a previous alpha version of MS2/extra which may have some issues unrelated to the siamese code. I was waiting to get some validation of my code by someone else's bench testing before porting it to the latest release. But if you want to test it in a car, I'll look at that right away.

Are you still in Africa or are you back home? Let me know how you want to proceed.

Cheers,
Jean

http://www.jbperf.com/

Peter .. so which is it ... rwd or a different gearbox?

Every day is a school day ...........

How fast and how expensive ...... the same question...

Has the Magazine been shelved then Peter what with you working away?

I had a feeling ... LOL

Do you have any idea how much fun, or otherwise, it's going to be to get it mounted up in the subby?

Will the engine have to go forward so the diff clears the subframe or is it a long way to the offside for the engine?

Sounds really interesting.

Every day is a school day ...........

How fast and how expensive ...... the same question...

was just looking at a meastro in a breakers and my thought way "thats wide".

Look forward to seeing it when done but if I was going to all that trouble I'd be thinking of a different engine to be honest.

Fair play for doing it though mate.

Every day is a school day ...........

How fast and how expensive ...... the same question...

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

4age .... oh yes ..... I love those .. basically a BDA with metric fasteners!!!

Shall we give Jean his thread back now?????

lol

Every day is a school day ...........

How fast and how expensive ...... the same question...

cant understand people doing things differently myself ,


you get 99 percent of people saying it wont work





and 1 percent saying go for it ...........,oh yes i forgot ,thats my job .....
GO FOR IT PETER !!!!

Edited by robert on 17th Apr, 2007.

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

hi there just wondering how the code is coming along.

i am currently building an mpi with an eaton charger, i have modified the original mpi inlet manifold to accept the charger sat on top with a billet adaptor also have fitted 2 extra injector at the back of the manifold in a direct line with the inlet port.
in this set up i intend to use the original 2 injecotr position for the low running injectors which will be magnetti marelli iwp043 330-420cc dependant on fuel pressure then the other 2 injectors which will be identical iwp043 as staged injectors.

i would like to trial the siamese code on this setup, does anyone see any problems with the setup

i am running the standard mpi flywheel with reluctor ring 32-4 teeth although i can weld up the other 3 missing teeth if this causes aproblem

cheers mike

There is a version of the code that seems to work on the bench but there hasn't been any other validation done by anyone but me. It is also based on an early version of the MS2/extra code. I am working on a newer version based on the latest version of the MS2/extra code but it's not yet ready.

The siamese-port code does not support the 36-4 wheel (neither does any version of the MS2/extra code). If you have the exact position of the missing teeth then let me know and it is possible that a later version will support it. For now, the only option would be to add 3 missing teeth.

I don't know what power level you're hoping to achieve but the injectors might be on the small side if you're thinking anything much over 120-130 HP. Don't forget that the usable duty cycle for port injection on the siamese-port engine is limited to about 40-50%. You might want to keep these injectors for primary ones and find bigger ones for the secondary injectors.

Cheers,
Jean

http://www.jbperf.com/

I know I've been slack on this Jean .....

I now have everything I need to test properly except time (and an MS2 not in a car ..... can just be pulley out though)

I haven't fogotten that I said I would do this further testing.

I will mail you later and we hopefully can move this forward.

Every day is a school day ...........

How fast and how expensive ...... the same question...

ok jean thanks for the reply i had a feeling the 36-4 would cause problems so will repace the missing teeth and leave just the one at 40deg btdc was hoping for just over the 130 bhp mark so i guess ill have to source some bigger injectors would these injectors i have still not be big enough even running at the higher end of there scope at 420cc what size would you recommend as a minimum many thanks

I also have had other familly stuff taking priority over this... Apologies. :(

On a more positive note, once I've got the car and the wifes 35 MOTd I shall be getting back to this.

I'm going to fit the two widebands on the LCB downlegs (1275 NA), then do a run with the carb fitted as a baseline.

I'm using the LM-1 and aux box for datalogging.

I've got to finish the fuel rails and throttle body branch, then fit the EFI manifold on the car.

I'm going to run it first of all with bog standard MS2 injection, alternating injectors and 4 pulses per cycle, just to see how well that works.

Then I'm going to convert to MS2/extra, junk the EDIS etc. See how that works.

Then upload the Siamesed port code and run that. Hopefully I'll be able to develope a NA advance map for the injection that we will be able to extend for boost.

Finally fit the 998 turbo engine. Project finished

Simpole as that - not.

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."

Not being funny but how many times do I need to post up the tooth format of the MPI reluctor before anyone actualy takes any notice.


http://www.turbominis.co.uk/forums/index.php?p=vt&tid=9523

Edited by Sprocket on 6th Sep, 2007.

Thank you Mini Sprocket. I'm sorry I forgot about that and I was a bit lazy in searching for it.

Do you know what the cam signal looks like? From one of the previous post, it looks like a single pulse per cycle (which makes sense) but I'd like to know where (in degrees) it happens. The standard MS2/extra code expects the cam signal to arrive before tooth #1 so I'd have to see where it happens and decide then which tooth should be #1.

As for Roger and Dave, it's not a problem. Family matters come first and I also have been somewhat slack about finishing the siamese-port code based on the latest MS2/extra code.

Paul, that sounds like a good plan. Very methodical which should be great for finding what's happening if something goes wrong. I look forward to see the results.

Jean

http://www.jbperf.com/

http://www.jbperf.com/

I now have the MPi cam so will slot it into a block and time it up then see where the signal occurs.