Info required, Megajolt ignition systems

[Incorrigible]

I've just spent *****ing ages trying to get a sensible answer out of google to no avail...

I'm thinking of sticking coil packs on a K series (it's a space issue really, I want to retain the original bulkhead but get the engine back as far as possible) long story

Anyway, where can I buy a megajolt kit, bits or complete? Anyone done a K series and have any tips

Or shall I just spend the extra and get an Emerald

[GreenV8S]

Any of the megasquirt suppliers would sell you a kit or completed system for MegaJolt, I'm sure. For example, contact Phil Ringwood.

[Incorrigible]

Thanks Pete,

His website is the same as all the others I've seen, they seem to have a lot of info on the squirt side not so much on just the jolt. I just wanted a bit more info before ringing someone up as it's not certain we'll be going ahead like this. The guy who owns the car keeps flipping between 40CDOEs and injection. I just want him to decide once and for all that he doesn't need the distributor so I can finish welding it up

[Jerkins]

Here's the official Megajolt supplier - http://www.autosportlabs.com/

A very good supplier - very prompt, very reliable, good after-sales support.

The latest version is not an easy DIY job - if you aren't experienced in electronics & fine soldering I'd recommend that you buy a ready-made unit. You'll also need some extras - a trigger wheel for the end of the crankshaft, a VR sensor to get signals from it, and a Ford EDIS unit. Finally, you'll have decide whether you want to use a MAP (engine vacuum) sensor, or a TPS (throttle position sensor).

Sounds like a lot, but the rewards are good... rock-steady ignition timing, strong sparks, and mappable ignition timing (with logging, if required) via a laptop PC. The unit also has an in-built soft rev limiter, shift lights, and an add-on hard rev limiter.

I've been very happy with mine - far better than the worn-out old dizzy I used to have on my engine.

Edited by Jerkins on Wednesday 26th August 22:18

[GreenV8S]

If you want to find out more I'd suggest an email explaining what you're looking for. If a full EFI system is interesting, you might consider getting the full ECU now even if you don't install the fuel side.

[Incorrigible]

GreenV8S said:

If you want to find out more I'd suggest an email explaining what you're looking for. If a full EFI system is interesting, you might consider getting the full ECU now even if you don't install the fuel side.

I know what you mean, I need to cost some options. I ought to post some pictures really, it's quite an interesting project

[Incorrigible]

Jerkins said:

The latest version is not an easy DIY job - if you aren't experienced in electronics & fine soldering I'd recommend that you buy a ready-made unit. You'll also need some extras - a trigger wheel for the end of the crankshaft, a VR sensor to get signals from it, and a Ford EDIS unit. Finally, you'll have decide whether you want to use a MAP (engine vacuum) sensor, or a TPS (throttle position sensor).

I'm not scared of the electrickery. From what I've read, I think bolting on the ford system would work fairly easily. Idealy though I'd like to use the K series coil packs (just for neatness) Just wondered if anyone had already done it

Thanks for the link, I'll have a peruse

[Jerkins]

People have used coil packs (on Japanese engines) but I think that they do need some fiddling.

[Jerkins]

Incorrigible said:

I'm not scared of the electrickery.

I was thinking more of soldering components onto the circuit board - the latest version uses surface-mount components, and soldering them ain't easy!

The wiring of the ignition components (EDIS, VR sensor and the Megajolt connector) is easy though.

[Steve_D]

The issues most have with the coil packs is getting them set up as there are quite a few tweeks like dwell angles etc.
EDIS on the other hand does all that for you and includes a 10 degree 'limp-home' mode. They are easy and cheap to find on the breakers because they very rarely fail. The sensor comes from the same source and only needs a bracket fabricating to hold it.
You may find the trigger wheel off a transit will work well or they can be bought laser cut from triggerwheels.co.uk.

Not sure if jolt does it but MS can have switchable maps.

If you really get stuck go over to LR4x4 in the Tools and Fabrication forum where you will find both expert help and a source for ready built units. I know it is not Land Rover related but I'm sure they will forgive you.

Steve

[bertelli_1]

I think the k-series coils you are talking about are actually a wasted spark setup. Does each coil supply 2 plugs (iirc they sit directly over one plug & have a short ht lead to another)? Wasted spark is easier to implement than cop (coil on plug, 1 coil for each plug). You could also rob the whole injection system off another k-series lump (inlet manifold, throttle body etc) as this would give you the tps. I can't remember what trigger wheel they use though.

[eliot]

I would be inclined to purchase a full megasquirt and use it as spark only. If you decide to wire some of the other sensors in, you will have a nice engine data logger as well.

[Incorrigible]

bertelli_1 said:

I think the k-series coils you are talking about are actually a wasted spark setup. Does each coil supply 2 plugs (iirc they sit directly over one plug & have a short ht lead to another)? Wasted spark is easier to implement than cop (coil on plug, 1 coil for each plug). You could also rob the whole injection system off another k-series lump (inlet manifold, throttle body etc) as this would give you the tps. I can't remember what trigger wheel they use though.

The CPS works on the front of the flywheel.

Yes the standard K inlet, plenum, etc would work but the twin 40s would look more period