Dizzy Wiring OR Megasquirt Guru C20XE

[Scoobler]

I have just got an XE with 45's fitted, it came with a dizzy, a coil and an amp but no loom and it was wired with a custom loom when it was removed from the car, again loom was removed before I got the engine. Hence I have no idea how to re-wire the ignition side.

I have read two different solutions, one doesn't use the amp the other does. Can anybody tell me, does the amp help control ignition advance? Its just it takes the revcounter input, so wondering if the amp advances the ignition at higher rev's?

Anyhow onto the main question, can anyone confirm the following wiring and which one is best to use (the dizzy does have vac advanced, but it is blocked off with nowhere on the manifold to atach it to)?


Without Amp:
Dizzy (o / pin 2) - Green - tacho (Not needed)
Dizzy (+ / pin 1) - Red - +12v ign
Dizzy (- / pin 3) - Black - Negative trigger on Coil (-)
Coil (+) - Black - +12v ign


With Amp:
Coil (+) - Black - +12v ign
Coil (-) - Green - Amp pin 1 (Also rev counter)

Amp pin 1 - Green - Coil (-) (Also rev counter)
Amp pin 2 - Brown - Ground
Amp pin 3 - Brown/White - Dizzy (- / pin 3)
Amp pin 4 - Black - +12v ign
Amp pin 5 - Black/Yellow - Dizzy (+ / pin 1)
Amp pin 6 - Blue/Green - Dizzy (o / pin 2)

Dizzy pin 1 (+) - Black/Yellow - Amp pin 5
Dizzy pin 2 (o) - Blue/Green - Amp pin 6
Dizzy pin 3 (-) - Brown/White - Amp pin 3




Additionally to getting the wiring working for now, does anyone know much about the megasquirt?

Basically I still have a dis-pack from my old engine so was thinking of using something like megasquirt just for the ignition side of things.
I know there is megajolt but as far as I know that doesn't work with the vaux crank sensor and 60-2 pickup wheel. And I don't want to add the edis system.

I think the megasquirt will work with just a crank sensor and trigger wheel. It apparently would also need a coolant temp sensor (which is still on the engine) and an air intake temp sensor (which I have from the old engine but would need plumbing in) but that is just something I have been told and am not sure if it actually would need them?

Can anyone tell me if this would work, and what components I would need? I don't mind building the boards up my self as if I go down this route I want to spend as little as possible on it!

Thanks in advance!

[Scoobler]

Anyone at all?

[djivesp]

Apparently megasquirt needs crank trigger (vaux 60-2), cts, inlet air temp, and a throttle position sensor too. It has a map sensor on the board - so you'd neet a take-off for that on one of your inlet runners.
That's what i've been told too, hope it's right as i'll be starting my installation soon .
Then i think you just choose to run ignition only in Megatune (iirc). if not, you could possibly use resistors instead of injectors to fool it.
They go for pretty cheap to be honest - you can get a fully built MS2 kit for about £250
, MS1 is cheaper, and i've seen them go on ebay for even chaper still. TBH i'd say it's worth going pre-built - will eliminate so many things when/if you run into problems installing it

[screamer69]

m/w will work fine with either the tooth wheel and cts and air temp you dont have to run mapsensor you can run throttle postion & rpm ( bit more of a bastard to setup ) then you can use a locked dizzy ( stock ) or switch to dispak i would stay with m/s 1 &extra for now as they are still in beta with m/s2 but one its become stable all you have to do is swap the chips and slight modding to the unit ( depending on mods already done )

so far ive done 4x 8v engines (with different mods 2 of them are turbo ) 1 let ,1 ecotec and 1 xe dansturbo on here had a built unit on here from me and nussy306 has had a repair and part map on his if you want anymore info m8 get hold of me on vaux-extreme.com (astra 8vt ) as i dont come on here very often

[Scoobler]

Cheers for the replys guys.

I already have the dispak, cts, crank sensor and hopefully if I can find it a iat sensor - so if thats all I need I will go down that route but will need to know which M/S to get.
I have signed upto vaux-extreme screamer69 so will contact you on there.





Can anyone confirm the dizzy wiring for the time being?