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Technical Megasquirt

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Technical Megasquirt

jamie86 said:
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?
Click to expand...

The DTA is far superior, but then it would be. It was professionally mapped and fitted and the only time I've driven it it had 150bhp on tap! So not really a fair comparison:eek:

I would say that backup is your key. If this and other forums can support you enough then you're OK. If the place down the road appears helpful then your choice is made. I slipped to DTA through lack of support and a changed financial situation.
 
im running it 2 weeks now
it started on the second turn, after 2weeks of tuning tuning tuning.. delivers est. 10-15 ps more than stock, running smoother than
stock pulling much better from low rpms 2500-4000 to high rpms

basically everything is stock except air filter with 69.5cm pipe to TB, original "ragazzon" N complete exhaust, fuel pressure 4 bar, JAW LSU4.2, and some other little things

i had some fun with my spark table what max. advance and especially WHEN to lift the curves.. have 95% of my max advance of 35° now raising in before 4000 rpm ..

idle was a cheap trick.. i control the petrol vapuor recirculation valve with the canister disconnected..works nice but on heavy use (lights, fan, radiator, stereo on =) it seems to be a little bit too small for the required airflow..adjusting the throttle stop cured it.

today i found a brand new shiny KKK K14 and my old manifold in the garage :D

megasquirt rocks
 
mrheat said:
idle was a cheap trick.. i control the petrol vapuor recirculation valve with the canister disconnected..works nice but on heavy use (lights, fan, radiator, stereo on =) it seems to be a little bit too small for the required airflow..adjusting the throttle stop cured it.
Click to expand...

Now that's an interesting idea, and a part i was just going to ditch...I'll have to look into that, although i have fitted an uprated PWM transistor so may just go the bosch/ford valve route.

Kristian
 
davethetrike said:
The DTA is far superior, but then it would be. It was professionally mapped and fitted and the only time I've driven it it had 150bhp on tap! So not really a fair comparison:eek:

I would say that backup is your key. If this and other forums can support you enough then you're OK. If the place down the road appears helpful then your choice is made. I slipped to DTA through lack of support and a changed financial situation.
Click to expand...

Cheers for that Dave,

I'm thinking of just biting the bullet and going for an Emerald in the future (y)
 
jamie86 said:
Cheers for that Dave,

I'm thinking of just biting the bullet and going for an Emerald in the future (y)
Click to expand...

Looking on msefi.com obviously they are bias but it seems that megasquirt will be as good as you want it to be. If you only put a few hours tuning in then it wont be great but if you spend more time on it then there is no reason why it cant be as good as anything else.

Im nearly ready to take the plunge myself. Everything bar the money lol.
 
LanciaMad said:
Looking on msefi.com obviously they are bias but it seems that megasquirt will be as good as you want it to be. If you only put a few hours tuning in then it wont be great but if you spend more time on it then there is no reason why it cant be as good as anything else.

Im nearly ready to take the plunge myself. Everything bar the money lol.
Click to expand...

Tbh i'd rather just take it to someone who knows what they are doing rather than messing around myself... So the Emerald seems ideal all in one complete box...

Spanner welding i'm fine with but programming no chance
 
i quite like having total control of the engine myself, i know to alter settings on the emerald it must go back to a dealer as you do not get the cables to connect it to the laptop with it. MS on the other hand, can just plug it in and mess the settings up all on your own :D
 
Yeah true but you don't get eveything all together in one tidy box in the engine bay...

The ECU will be the last thing I do anyway so got plenty of time to chnage my mind a few more times yet :eek: :)
 
reeeeeeeeet. been tinkering again, and would like to add how forgiving the MS ECU can be..

i've made a few mistakes in setting it up. The LC1 was set to give lambda 1 when the AFR was 17.8:1, so thats been throwing off anything that has been using the lambda sensor to calculate anything.

I have not paid *much* attention to the VE tables, more looked at the AFR target tables.. these are more a fine tune for the VE table than an actual mapping aid.. silly arc. My VE table is a slightly tweaked version of waht was on there to begin with, which is the map for some small block v8 i think.. so the fact that it ran, passed emissions tests and idles nicely (anyone who heard it at gaydon!) is a bloody miracle.

Time for some re-tweaking tomorrow. :)
 
yeah, the other output is set to 0-1v and is feeding my AFR gauge. am tempted to sell that guage, and replace it with a digital panel volt meter and change the LC1's 2nd output to 0-2v.. that'll give me a digital AFR readout, and only cost a couple of quid. (y)

am also considering how best to add idle control. now i have a scrap yard nearby that'll let me hunt for bits i can find the pwm idle valve i want. as the temp is dropping, cold starting is become more of a pain and holding idle when the engine has just started doesnt always go down well!
 
Right, here's a question I touched on in another thread.

At the moment the MS can drive 2 coils, 4 spark plugs, in a wasted spark system.

I was going to make an adapter plate and mount my twin coil to the engine, via my magnecore leads, to the spark plugs.....easy, MS can do that however....

I have COP's (Coil On Plugs) at the moment on the new engine. I am not going to run each one individually, but I am wondering if anyone has done/if its possible, to run the 4 coils as wasted spark, using the two coil outputs from MS, spliced to the 2 pairs of COP's?

Kristian
 
Cheers Asteris,

as far i can see thought, that article talks about driving several coil packs at different times, for >4 cylinders running wasted spark.

What i want to do is run a 4 cylinder wasted spark system, that normally has 2 spark outputs (1+3)(2+4), but splice it so i run 4 coils in wasted mode.

Kind of hard to explain exactly what i mean, so i may just fit the COP set-up to my running seicento ecu, splicing wires, and see if it runs :eek: :D

It could work in which case my idea is verified, or it could result in £200 of COP plugs and a Seicento ECU destroyed :eek: :devil: :eek:

I'll try it on the weekend if I get chance....wish me luck lol

Kristian
 
kritip said:
What i want to do is run a 4 cylinder wasted spark system, that normally has 2 spark outputs (1+3)(2+4), but splice it so i run 4 coils in wasted mode.

Kind of hard to explain exactly what i mean, so i may just fit the COP set-up to my running seicento ecu, splicing wires, and see if it runs :eek: :D

It could work in which case my idea is verified, or it could result in £200 of COP plugs and a Seicento ECU destroyed :eek: :devil: :eek:

I'll try it on the weekend if I get chance....wish me luck lol
Click to expand...

like this?

http://www.rplab.co.yu/Downloads/Wiring diagrams/Ignition/1x1 Pencoils - wasted spark.pdf

found that off a page Aaron sent me.
 
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