Miks15
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| posted on 5/1/10 at 01:59 PM |
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megajolt
Right i now believe that i need megajolt to get my engine going.
What exactly will i need and where do i get it from?
I have a distributor on my engine, can this still be used in conjunction with the megajolt
My engine already has a toothed wheel and crank posistion sensor.
Any help much appreciated
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blakep82
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| posted on 5/1/10 at 02:06 PM |
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send a u2u to paulf on here. i got mine from him
tho tbh, it should run with the distributor you already have.
what ignition system does your engine have? is it the motronic system? have you got the haynes manual?
megajolt would replace the distributor system, but with megajolt you'd also need the ford edis, coil pack, crank sensor, and timing wheel (if
yours isn't already 36:1).
its probably better than the dizzy set up for a car run on non standard things like bike carbs etc, but i wouldn't say its easier to set up than
what you already have
having had a quick look through the manual, it mentions the coil can be damaged by a faulty ecu. so maybe it needs the ecu to work. i thought the
ignition and injection systems were seperate.
[Edited on 5/1/10 by blakep82]
________________________
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don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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Miks15
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| posted on 5/1/10 at 02:14 PM |
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i believe the only thing i need, mabye completly wrong, is something connected to the coil to give the AC, (what i believe old mechanical ones had
were contact breakers)
Ive traced the wires back on ym BMW loom and one wire goes to the ECU leading me to believe that the ECU controlled this part on the standard BMW
setup
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David Jenkins
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| posted on 5/1/10 at 02:27 PM |
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Megajolt needs the following items:
A trigger wheel on the crankshaft (some Ford cars have this function on their flywheels).
A VR sensor to read the trigger wheel
A Ford EDIS unit
A Ford coil pack
New plug leads to match
And the MJ unit, of course!
You will NOT need your old distributor or coil - although some masochists have modified a dizzy to drive the MJ, that way is a world of pain...
There is a huge amount of info on the Autosports website, all very easy to read.
BTW: it is worth it, as the system is far superior to the old dizzy, points and coil.
[Edited on 5/1/10 by David Jenkins]
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twinturbo
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| posted on 5/1/10 at 03:00 PM |
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Not sure if MJ is the same but Megasquirt can either use the coil & dizzy for the delivery of the spark or coil drivers.
I doubt it's difficult to do on MJ.
Personaly, I would go wit an EDIS4+Coilpack based setup.
In Fact, you could probably get the BMW lump to fire up with just a basic EDIS4+coil wired in. It will give a static timing but should run just
about.
TT
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blakep82
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| posted on 5/1/10 at 03:09 PM |
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^ yes, correct. don't need MJ to start with. just get running on EDIS first
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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Miks15
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| posted on 5/1/10 at 03:46 PM |
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ok mabye a dumb question...
what is EDIS?
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twinturbo
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| posted on 5/1/10 at 03:58 PM |
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Electronic Distrobuterless Ignition System
A ford ignition system introduced in the 1990's usualy consisting of an EDIS module and a coil pack.
Available as
EDIS 4
EDIS 6
EDIS 8
they do away with the distributor and instead provide one dual ended coil per pair of cylinders to operate "wasted spark"
Normaly the edis module will send a PIP signal to the ECU ( EEC-IV or EEC-V ) which will respond on the SAW line with a tailored instruction for the
given engine conditions so the EDIS can control the COILs most effectivly.
If the SAW signal is lost the EDIS defaults to ( IIRC ) 10 degrees BTDC . static timing.
Hence you can run the EDIS without the ECU for testing.
Megajolt replaces the ECU ( EEC-IV/V ) in this model
TT
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twinturbo
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| posted on 5/1/10 at 04:01 PM |
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PS..
Sometimes the coilpack was replaced with COS ( Coil on stick ).
Later on they did away with the seperate EDIS modules.
TT
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Miks15
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| posted on 5/1/10 at 04:08 PM |
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so basically i can get it running using this... and then to get it running better i can use megajolt (which will effectively replace the original ECU
signal?)
So is it
this what im after?
Will this get me running?
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austin man
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| posted on 5/1/10 at 04:16 PM |
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is your engine a carbed model or injected ?
Megajolt for carb, megasquirt for fuel injection
Life is like a bowl of fruit, funny how all the weird looking ones are left alone
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twinturbo
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| posted on 5/1/10 at 04:19 PM |
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Yep that's a standard EDIS for kit.
You may be able to use the BMW pickup.
Else you will have to mount the ford one somehow. And perhaps if you do you can make it adjustable for the time being to get it running better on jus
the EDIS.
TT
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twinturbo
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| posted on 5/1/10 at 04:20 PM |
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You will find a simple wiring diagram on google, It's fairly easy though.
TT
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big_wasa
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| posted on 5/1/10 at 04:55 PM |
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If yours is a 6 cyl bmw lump then you will need an edis 6 not the 4.
Rare here in uk more common in the usa.
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big_wasa
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| posted on 5/1/10 at 04:59 PM |
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ebay link
Be aware the edis is bugger all use with out the plug / wires. and even harder to get than the edis itself.
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Miks15
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| posted on 5/1/10 at 05:11 PM |
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its a 4 cylinder
so the ebay link i posted is the one i want then?
Do i need a 36 tooth wheel?i think mine has a lot more teeth.
Where could i find a replacement or one i can bolt on?
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twinturbo
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| posted on 5/1/10 at 05:23 PM |
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Could be a 60-2
EBAY again for a 36-1
And then find a way to mount it...
TT
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blakep82
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| posted on 5/1/10 at 05:32 PM |
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the ebay link will be fine, however, theres a different type of coilpack which would work better. its called 'pin in tower' i think, which
if you can find a kit with that type of coil you should be able to use your existing plug leads
have you got any photos of your crank pulley? i have an idea on the trigger wheel 
[Edited on 5/1/10 by blakep82]
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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big_wasa
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| posted on 5/1/10 at 05:44 PM |
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ive got a cvh front pulley with a good solid 36-1 trigger wheel on it if you want to collect before it goes in the bin ?
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David Jenkins
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| posted on 5/1/10 at 06:42 PM |
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I think people are getting confused... if you want to know how Megajolt works, take a look on this
page.
The only reason for using the dizzy would be if fitting the trigger wheel was impossible. This would mean fitting a 72-2 wheel inside the dizzy, and
finding a sensor small enough to read it reliably - tough to do.
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Miks15
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| posted on 5/1/10 at 07:06 PM |
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i can get a pic of the front crank pulley tomorrow blake, why whats your idea?
Do you have any pics of the trigger wheel your offering by any chance?
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twinturbo
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| posted on 5/1/10 at 08:14 PM |
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quote:
Originally posted by David Jenkins
I think people are getting confused...
I am not confused, just not 100% sure what modes of operation MJ supports.
A number of advanced Electronic Ignition systems still use a mechanical rotor to distribute the spark to the correct plug.
Virtual all ford Sierras with Carburettor use a version of ESC ( ESC-2 , ESC Hybrid )
In fact... You may be able to get this BMW fired on ESC-Hybrid from a 1.8 CVH.... Using the existing HT distributor. But the advance maps would be
wrong.
TT
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Miks15
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| posted on 5/1/10 at 09:15 PM |
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ive bought that edis module now...
unfortunatly off to uni again at the weekend so progress will be halted until i return at some point, so doesnt look like it will get fired for at
least a month or so.
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twinturbo
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| posted on 5/1/10 at 09:32 PM |
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Take the Edis kit withyou and build the loom while you are at uni.
TT
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twinturbo
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| posted on 5/1/10 at 09:56 PM |
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infact, find a 800rpm 12v motor. Fit the trigger wheel to it. Mount the sensor and your edis kit..
Finish off building a test rig and you can impress all your mates with a spark generator....
TT
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