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Technical Megasquirt

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Technical Megasquirt

Asteris said:
Found out yesterday about that. There is a small port on the gearbox, which shows 0, 5, 10 and 15 degrees timing marks. Borrow a timing pistol, set Fixed Advance at Fixed Timing (at More ignition options) and Timing for Fixed Advance at 10 degrees.

Then, you can start your engine and check what the gearbox port shows, and if necessary, go at Tools -Trigger wizard and set the correct value. If the value is more than +/- 6 degrees, change a tooth (or angle) at Trigger wheel settings.
Click to expand...


I am having problems getting mine going, so thought it best to go to basics and check the simple stuff....like the timing.

I bought a gunson advanced strobe, set fixed advance at 10 degrees, put the pickup on lead number one, an opened the inspection port.

I presume i'm looking for the notch that is in the flywheel as a reference to the markings on the gearbox?

ie. this mark (thank goodness a bit was left after the lightning :D and i had a picture to double check!):

P1010756.jpg

When i run the engine at 10 degree advance though....the mark is nowhere to be seen!?!?!?!

What could be wrong here? I'm all confused lol.

Kristian
 
the mark was reduced so much it wasn't actually viewable i found out in the end, so i found the mark by touch and moving the engine a bit at a time until i felt it and then painted it on.

DSC00084.JPG

it idles with 60 degree trigger and TrigA 11, TrigB 41 so:

60+(11x6) = 126
60+(41x6) = 246

but when its idleing with a fixed advance set at 10 degrees, you can't see the timing marker.

increase the fixed advance to 15 ( starts to run a bit rough) and the timing marker appears at roughly -5 degrees...

so it look like at 10 degrees advance its at -10 degrees :confused:

KRistian
 
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Whats the cheapest way to "map" or remap a 1242 low blow conversion? I would like just to Plug in and go but understand rolling road time may be needed. i here lots of talk about emerald, omex, and mega squirt.

Im trying to make a reliable low blow Seicento. I understand programmable ECU s give full control of fuelling. I have seen Turbo Cinqs come up for sale but no one really mentions much about the ECU. can my standard seicento ECU be remapped at a rolling road? Do i need new ECU? Where do i buy an affordable ECU for turbo ? Any advice on who would make me a manifold for the T15 Garrett ?

Whats my cheapest reliable options. Once set up i am happy to leave it alone, i wont be plugging in a laptop every weekend!!

Its just an 8 valve 1242 low blow conversion.

Advice please?

Cheers Rob
 
Hmm I'm not too sure to be honest. I know to self map it would need a custom ecu, you can use yours if it an spi car (pre november 2000) with a fuel cut defender and MF2 etc. If it is an mpi will really need a custom ecu. The standard ecu is a ****** to map even on an n/a car with a different engine.
 
Also are these megaquirts worth all the trouble, I know they are good value but, I know Dave The Trike ended up just resorting to DTA or whatnot they seem like a complete pig to setup, but I'm not that technically minded.
 
Kritip.....

It makes it harder using the rear of the engine to time it up and if the timing more than 15 degrees BTDC you cant see it because the gearbox casing is in the way plus all the hoses, wires, etc. If you do it from the front you can see where the TDC mark is anywhere at anytime....

If you remove the trigger wheel on the front of the engine, get the engine to TDC using the groove in the crank pulley and the mark on the oil pump, then put the trigger wheel back on and put tipex on the trigger wheel and the crank sensor/bracket to show where tdc is. You will have to remove the inner wheel arch and maybe the wheel but you can see clearer and you can get down so you are looking straight at the marks from the side of the engine. This is how I did my megasquirts on my turbo 1242 and 1108.

Rich.
 
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It is a Pre 2000 car . SPI engine. very early seicento (1998) . So where do i buy an MF2 chip and fuel defender?

Although im getting a feeling it will be just a cheap to go megasquirt........ I have no idea about self mapping. Im a mature owner and not that computer literate!!

HELP.
 
Basically the MF2 controls the additional injector that you would need to run on a Turbo conversion for the SPI (y)

Where abouts in the country are you as you will definately still need a RR set up
 
JR said:
Also are these megaquirts worth all the trouble, I know they are good value but, I know Dave The Trike ended up just resorting to DTA or whatnot they seem like a complete pig to setup, but I'm not that technically minded.
Click to expand...
Being honest, a lot of the problems around the MS I see are more cause people are doing it them selves rather than paying someone to do it & you'll have a lot of the same problems with an aftermarket ECU if you did it all your self.
 
I assume not all SPI cars run second injectors at all? There are so many turbo conversions and i wouldnt have thought they ran second injectors?

Would it be possible to build the 1242 turbo, standard ECU with Fuel cut defender. Then Run the car. ?

Adding the MF2 and second injector (however i do that) after the thing is actually up and running? I assume the second injector goes in to the intake manifold?

Im trying to do a staged build (which might be wrong) but im worried i end up with a pile of expense and a car i cant program to run correctly.

People must be using just fuel cut defenders on standard ECU s? No?
 
The only way really to run without a second injector is to change the engine to mpi(I have an mpi turbo'd cinq atm and did most of one a while ago before selling it unfinished)and use bigger injectors thus not needing to install a secondary fuel supply on boost such as a second injector and mf2.

However you will then need to get an ecu that will recognise the fact that you have a turbo fitted and that more fuel is required once it sees boost.

Either way you will need to somehow get more fuel into the engine so a fair bit of work is require whatever route you take.

You could get the turbo fitted to the engine and it would run on the standard ecu but even if you fitted a FCD it would not run on boost because the standard fuel system/ecu cannot provide the fuel required. You will need to do it all in one go for it to work properly.

Rich.
 
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A FDC its self stops the ECU cutting fuel/ignition due to it seeing what it believes is an incorrect value of boost, in the N/A ECUs case that means positive pressure not vacuum!

Once you have fooled the ECU into thinking everything is like it wants you need another piece of electronics to supply the extra fuel required by the air getting into the cylinders. This is where the second injector comes in, the MF2 controls that second injector delivering the extra fuel required to generate more power & don't melt your pistons/valves/etc.
 
Re: Megasquirt/ Ecu / turbo

So on an SPI i assume i can add a second injector Above the throttle body? Mounting it directly on to the cap (or "bob") .

Would this work?


(thanks for all the support guys it really is helping me get things clear now)

Any ideas on who could make me a manifold up for the T15 turbo. i am a hands on person but for this one i really wouldnt mind just paying the cash! Ive got access to welding gear but im not the best welder to say the least! anyone interested in flogging me something? There must be some italian workshop banging these out!???

I assume the MF2 unit and Fuel Cut defenders are easy to wire up.

cheers. Rob
 
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