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Megajolt 3D Ignition System / Ecu For Austin/rover/mini Engines + Hard Rev Limit Load Sensor Type: Map (Manifold Absolute Pressure)


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#1 A-Series Spares

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Posted 14 March 2013 - 12:23 PM

Megajolt ECU for Austin/Rover/Mini engines (A-Series)

Load sensor type: MAP (Manifold Absolute Pressure)

This ECU is only a few months old and has been used on our 1330 A-Series Morris Minor. This ECU works off Manifold pressure, we are now moving from SU carbs to a Weber 45 DCOE which means we now need to move to the TPS version of this ECU.

This system comes with the Hard cut rev limiter board for Megajolt systems The Megajolt ECU includes an ignition retard rev limiter as standard. The hard cut module works with the existing soft rev-limit and fits inside the ECU case. When installed the soft-limit of the ECU automatically retards ignition timing to zero degrees 100 RPM before the hard limit activation point. This makes for a progressive application as you reach the rev limit.

Brand new this ECU complete with the Rev Limit will cost £165.00 so grab yourself a bargain.

We are selling this for £105.00 (including postage to mainland UK)

Here is the spec of this system:
  • 10 x 10 ignition map, with full linear interpolation between values
  • Load axis calibrated by on-board Manifold Pressure (MAP version) sensor or external Throttle Position Sensor (TPS version)
  • Four user-defined output switches, triggered on RPM or load
  • 'Shift light' output- for driving a dash-mounted shift light
  • External Rev-Limit trigger output
  • Modern, easy to use, and customizable Windows-based configuration software
    • Load, modify and save Ignition Configuration
    • View, log and interact with engine runtime data
    • Interactively visualize and tune ignition map
  • Dual, on-the-fly switchable ignition configuration
  • Configurable cranking RPM advance
Many thanks,
The A-Series Team

Edited by A-Series Spares, 14 March 2013 - 12:24 PM.


#2 Artful Dodger

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Posted 14 March 2013 - 12:29 PM

Can this not work at all with an engine fitted with a weber45??

#3 A-Series Spares

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Posted 14 March 2013 - 12:38 PM

Can this not work at all with an engine fitted with a weber45??


Because the manifold pressures are unpredictable (no balance pipe on the Maniflow Inlet) it would not give an accurate enough reading for this ECU.

It could be made to work if we had a balance pipe built into the manifold but we prefer the idea of going for the TPS ECU :)

#4 A-Series Spares

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Posted 14 March 2013 - 12:41 PM

Hi,

This item has now sold. Thank you for looking.

Rob

#5 Artful Dodger

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Posted 14 March 2013 - 12:42 PM

Ok thanks for that! Had no idea!

How are you going to monitor TPS? Off the end of the weber?

#6 A-Series Spares

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Posted 14 March 2013 - 01:17 PM

Ok thanks for that! Had no idea!

How are you going to monitor TPS? Off the end of the weber?


We have a Ford (although i think they are mostly the same) Throttle Position Sensor which we have made mounting brackets for and will work from the end of the shaft (with the butterflys on) We had to make an adapter to get the TPS to fit the shaft, it looked perfect but was fractionally too small.

We have a build thread on here which will be updated later this week, that will show the build of the weber and the Megajolt connection etc :)

#7 Artful Dodger

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Posted 14 March 2013 - 01:31 PM

Thanks very much, il take your idea if you don't mind! Thought I had to run a vacumn!

#8 A-Series Spares

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Posted 14 March 2013 - 01:44 PM

Thanks very much, il take your idea if you don't mind! Thought I had to run a vacumn!


By all means, there will be pictures added to the build thread over the weekend and early next week if you want to see how we get on.

http://www.theminiforum.co.uk/forums/topic/249497-a-series-spares-1400cc-a-series-powered-morris-minor/

#9 bakker110

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Posted 15 March 2013 - 07:29 PM

You could have just drilled the manifold for hose tails into a tee. Then run it through a pre fuel filter to the MAP input.

Did you give up developing your own mappable ignition?

#10 WiredbyWilson

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Posted 16 March 2013 - 12:30 AM

agreed, map is the way to go as tps just senses throttle position. personal experience on a mk1 escort zetec se (only one in country) and mk2 1700 Burton engine - MAP worked better and they both run twin webers.
we fitted take offs on all 4 inlets and a swirl pot to equalise the reading. spot on :)

#11 holmesy

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Posted 16 March 2013 - 08:30 PM

as above either a T piece or a plenum chamber




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