Technical Megasquirt

[davethetrike]

daves settings are:

Trig pos A: 3
Ret: 13

Trig pos B: 33
ret: 43

using them settings i get a stable RPM reading, but i've not had the car fire yet. Need to check my valve timing isnt 180 out!

Dave, when u say check with a strobe - what do you mean, i know bung it on no1 ht and then point at the crank wheel.. but i don't know what im looking for. I've never used a strobe before!!

You need to make a white mark (tippex) on the crank wheel ten degrees btdc and make a mark on the block (check this its in the mega guide). Then as you turn it over the strobe will pick up the mark, they should align.

Even with timing out mine still fired, backfired, spat back and all sorts. Something should happen

 

[arc]

ok, now i am confused. why are your trigger angles so high? im assuming the 16v has the same TDC/wheel setup as the 8v here.

mine is currently set at

Trig pos A: 8
Ret: 18

Trig pos B: 38
ret: 48

with a trigger angle of 69. the engine starts on this.

if i go anywhere near 114 as a trigger angle, theres no way it'll start.

https://www.fiatforum.com/gallery/showphoto.php?photo=28429 <-

 

[davethetrike]

ok, now i am confused. why are your trigger angles so high? im assuming the 16v has the same TDC/wheel setup as the 8v here.

mine is currently set at

Trig pos A: 8
Ret: 18

Trig pos B: 38
ret: 48

with a trigger angle of 69. the engine starts on this.

if i go anywhere near 114 as a trigger angle, theres no way it'll start.

https://www.fiatforum.com/gallery/showphoto.php?photo=28429 <-

All I can say is thats what I worked my angles out to and it ran very well on that!

When you say 69 do you mean 69 + 45 giving a total of 114?
The initial angle only goes so far and then won't work so you have to set it to 69 + ????

 

[arc]

does your wheel look like this? (engine meant to be at TDC)

If i set it to 69+45 it will not start. If i set it to 69, it will.

Looking at that bit that MrHeat posted.. it SHOULD work on 114, or thereabouts - and NOT at 69.

 

[gazzaman2k]

oooh nice hope mine runs 1st time

 

[davethetrike]

oooh nice hope mine runs 1st time

Thats funny!
There's several great minds, hours of blood sweat and tears, money, sleepless nights, regrets and 'Why won't it start questions'. Blind alleys and stupidity involved in getting these megasquirts started ...the only thing thats good is
A when it first starts
B each person that does it adds some more to the body of knowledge and helps everyone else.

C When you drive it and it actually works !

 

[arc]

it's true, i woke up at around 3am to pop to the garage and check i had power feed to the coil packs the other week..

i still do not understand how mine can run using a trigger angle of 69degrees.

Dave - can u, looking at the picture - what do you make for the trigger posistions and trigger angle.

 

[davethetrike]

it's true, i woke up at around 3am to pop to the garage and check i had power feed to the coil packs the other week..

i still do not understand how mine can run using a trigger angle of 69degrees.

Dave - can u, looking at the picture - what do you make for the trigger posistions and trigger angle.

Mines actually 63 + 45

You are using 60 - 2 teeth aren't you?
Nah that can't be it.

I'm not sure what I'm seeing in the pic! Clear though it is. Mine was set at 108 which is 18 teeth from the 'gap'. I didn't even look at the other trigger angles a and c etc as I just set the initial bit and left it! Crank (starting) angle was 10 degrees...you haven't set this to 45 have you?



Keep asking, I'll try to help but I'm not an expert.
Cheer up, I've just got the bill for DTA mapped fitted with new sensors and loom. Around £1400!

 

[arc]

crank angle is 10

trigger angle is 69. am using two teeth yeah

got it running smoother now, i measured the exhaust temp on the headers using an IR thermometer i borrowed from work, no1 and no3 were too cool - i had the coil packs wired up wrong way round.. haha. anyway, its a lot smoother. so tomorrow will play with the strobe, fix the adavnce to 10 and then adjust the trigger until it reads 10.

 

[arc]

iginiton timing is bob on now, trigger angle is around 77deg i think. weird. anyway, here is some useful info

Punto75 Injector is a weber / magneti marelli IW057 that flows 140cc at 3bar and has an impedence of 14.5ohms.

injector specs can be found here.

http://translate.google.com/transla...channel=s&rls=org.mozilla:en-GB:official&sa=N

 

[davethetrike]

iginiton timing is bob on now, trigger angle is around 77deg i think. weird. anyway, here is some useful info

Punto75 Injector is a weber / magneti marelli IW057 that flows 140cc at 3bar and has an impedence of 14.5ohms.

injector specs can be found here.

http://translate.google.com/transla...channel=s&rls=org.mozilla:en-GB:official&sa=N

Well done! Good feeiling isn't it

As a comparison the 85 (16v) engine uses 200cc pico injectors (different physical size to the 75 ones as well)

 

[mrheat]

have everything finished now..last part was integrating JAW controller into megasquirt case. last night i checked all wirings, solders. did oil&plugs. filled tank with 100 oct...ready to start? not really...

i think the values can be different, because you can use 1st cyl. pair (1&4) tdc or 2nd cyl. pair (2&3) for sync. is this correct??

as long as im not clear with this i wont try to start it.

 

[randomizered]

Finally built mine

Still the loom to make, but i have Dave's (dtt) map so the tuning should be fine!

One question...anyone use knock? I know arc may be, I sent him my sensor today .

If you are did you build philip's circuit?

I have bought a unit from Boris in Canada, for $77 shipped, that is recommended. Anyone else used it with success or faliure?

Kristian

 

[arc]

coolio, another sensor to play with

all i've done with regards to knock so far is turn the system off!

i am a wimp, and did not want to throw my soldering skills (i stopped soldering stuff when i stopped modding play stations and xboxs!) in the pot of 'things that might go wrong!'

as you can see, my ECU has a bonus board (saves trying to squeeze all this into the proto area)

 

[randomizered]

Interesting......what is that board, its not the relay board is it?!

Kristian

 

[jamie86]

Right i'm looking into using megasquirt for converting my Y10 from Carb to injection...

All this looks way over my head and obviously their wont be any existing maps.. how likely is it that someone with no clue like me will ever get it running?

Prob not the right thread but looking at it it's only about 100-200quid cheaper than using an emerald etc would it be worth the extra cash?

 

[arc]

Interesting......what is that board, its not the relay board is it?!

Kristian

it isn't, no. It's an aditional hardware board made by Bill Shuvington.

Jamie - there won't be any existing maps, no. But you don't need to completely swap to it, you could use the MS as a fuel controller to begin with and then once you are happy that works, swap the ignition system onto it as well.

 

[davethetrike]

Right i'm looking into using megasquirt for converting my Y10 from Carb to injection...

All this looks way over my head and obviously their wont be any existing maps.. how likely is it that someone with no clue like me will ever get it running?

Prob not the right thread but looking at it it's only about 100-200quid cheaper than using an emerald etc would it be worth the extra cash?

I come from the era of carbs and I got mine running.

I'm now using DTA simply because I'm running supercharged and I can (now) afford it. DTA is £550 but by the time I've paid for the loom, sensors and fitting it was £1000 plus rr time. I will say that going through the process of wiring, loom building stim building with the megasquirt etc. now means I have a good knowledge of how it all works.

 

[LanciaMad]

Wheres the recommended place to buy one of these things? Either pre built or build it yourself?

 

[jamie86]

I come from the era of carbs and I got mine running.

I'm now using DTA simply because I'm running supercharged and I can (now) afford it. DTA is £550 but by the time I've paid for the loom, sensors and fitting it was £1000 plus rr time. I will say that going through the process of wiring, loom building stim building with the megasquirt etc. now means I have a good knowledge of how it all works.

Hmm maybe Megasquirt it is.. not usre I can justify 1k on a Y10 even when it will be running 140+ bhp :yum:

I did notice a place on ebay selling the MS which is literrally 2miles down the road from me so may well pop in there and see how helpful they are..

Did you find any difference in how the car ran swapping between the two ECU's?