Jump to content
SAU Community

Recommended Posts

hey!!! (ive made this topic everywhere.. but i shouldve done it here coz of the head im using)

bloody hell had to remake another account because i forgot my username, but hey I own a vl calais turbo and im just about to put a rb26/30 into my car..

the motor is out at the moment (i bought it off someone else who also had a vl) and just before i put it in my car i need to know what to do....

previously the engine was running off a microtech ltx12s (or lt12s if its the same shit whatever lol) and the car is still in its run in tune, at 10psi.

so having said this i could get the ecu off the guy aswell, and plug his into my car and away i'd be.

he also has a decent coil setup. but id probably give him my motec m4 and i'd pay less for the engine or watever ("cash adjustment")

now my dilemma.

im really confused and i have nfi what to do with my Motec m4 (which i still own)... it sez on their webpages etc that it can run upto 4 ignition drivers? then people said what u do is batch them or whatever..... but it wont be as good as the lt12s coil setup or whatever...blah blah

well this is what ive been told so far -

you can run a Motec 'ignition expander' (runs up to 8 coils) and use batch or semi seq fire for inj, no probs

Or if you want / like CDI ignitions, use the motec CDI-8 module, easy as. both of these interface directly with the M4 ecu.

and then..

"As trev and shazza said, if you dont wanna run the expander, just run wasted spark instead of sequential, with 3 Bosch coil packs and you'll have an ignition output spare.

I dont know who told you that batching them will make idle bad, but its totally not true if its tuned correctly. It just means that the coil fires during the power cycle of two cylinders, rather than just one"

i am soooo confused and dont know what to do ay.

all i know is i gotta buy atleast an "ignition expander" for 330bux or i could pay nearly 2grand for some CDI bs... which seems shithouse coz thats too much.

what do yas reckon is my best option.. go for the ecu which is good enough and is aleady tuned etc (microtech) or go the motec way???????

big thx.

ps - dont tell me to speak to my tuner lol, i will but its a public holiday on monday, so they wont be open and i NEED TO KNOW WHAT TO DO ASAP!!!!!

Edited by gnki'vlct
Link to comment
https://www.sau.com.au/forums/topic/158999-motec-m4-multiple-coils/
Share on other sites

I would get a set of EL falcon ignition coils and run wastespark, there is no problem with wastespark, as heaps of factory and high performance cars run it. Set your dwell time to 4ms. If down the track you find that you need more spark grunt, you can easily fit a 4 channel cdi unit($600)and the coil block which is quite neat is about $120 brand new from ford. The coils even have the cylinder numbers already marked on it to make it easy to hook up the coils to the spark plugs.

Just to clear a few things up wasted spark fires 1 cylinder on the compression stroke the other on the exhuast stroke.

4ms of dwell at 13v is a fair amount I would probably run around 2.5ms - so you dont burn coils out.

Wasted spark is not what I would be worried about. Its the batch firing of the injectors that I would be most concerned about if it is to be a street car. However the microtech in sequential mode is probly a little bit better than the motec in batch fire and its allready setup and tuned so I would be leaning on going down that path.

so how much will i need on the side to spend???

get 3 coils? theyre 50each.... then the motec ignition expander? would this be all i need to spend? (the car will probably be making around 400-450rwhp and thats through an auto transmission)

coz im pretty tight atm... lol and this pisses me off all these things about "batch firing" and "sequential"...

*sigh* wish i wouldve just bought an m600 from the start

Edited by gnki'vlct

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • It is a kunfine Android screen . Does anyone know the wirering diagram of the fuga ??
    • just an update to this, poor man pays twice  Tried sanding down the pulleys but it didnt do the trick. Chucked another second hand alternator in the na car which I got for free off my mate and its fixed the squelling. Must have been unlucky with the bearings.    As for my turbo car, I managed to pick up a cwc rb alternator conversion bracket + LS alternator for 250 off marketplace, looked to be in really good nick. Installed it , started the car and its not charging the battery.... ( Im not good with auto elec stuff so im not sure if this was all I needed to do but I verified such by using a multimeter on the battery when the engine was running and I was only getting 12.2v )   I had to modify the earth strap for the new LS alternator , factory earth strap was a 10mm bolt which did not fit the bolt on the LS alternator which was double the size so I cut it off , went to repco bought some ring terminals that fit, crimped it onto the old earth strap and bolted it up to the alternator , started the car and same issue. Ran like shit and was reading 12.2 at the battery.  For a "plug and play" advertised kit thats not very plug and play but alas.  My question is , am I missing something ? Ive been reading that some people recommend upgrading the stock 80 amp alternator fuse to a 140 amp but I dont see how that would stop the alternator charging especially at idle not under load.  Regardless ive pulled it out and am going to get it bench tested by an auto elec tomorrow but it would be handy to know if ive missed something silly or have done something wrong.   
    • My wild guess is that you have popped off an intake pipe....check all of the hoses between the turbo and the throttle for splits or loose clamps.
    • Awesome, thanks for sharing!
    • To provide more specific help, more information is needed. What Android screen? What is its wiring diagram? Does the car's wiring have power at any required BAT and ACC wires, and is the loom's earth good?
×
×
  • Create New...