hi as with other people I am new to this and was wondering if it would benefit my car. I have a Fiat 124 spider 2000 fuel injection with high performance heads and exhaust. Basically I wanted to know how much the whole lot cost, what parts I need and if it actually helps?
Many thanks
Alain
Advice please?
Moderators: JeffC, rdoherty, stieg, brentp
Benefits of mjlj
Hi Alain,
Well, everyone has their reasons. I have a Fiat 132 TC engine in a Triumph Spitfire and wanted to fit Twin Carbs using a straight inlet manifold. To do this I had to get rid of the block mounted distributor. To do that I needed electronic ignition etc. etc.
On reading up about (mappable) electronic ignition there are many benefits over the distributor.
1. Better and more reliable spark - distributors have points etc. that corrode and degrade with time.
2. Engine timing - the mjlj has a programmable 2D map for timing advance. It doesn't miss a beat. You can accurately time the ignition for engine speed and load. With a dizzy this is done using centrifugal advance (for engine speed) and vacuum for engine load, however, being mechanical this advance can be a little rough.
In essence you should benefit with better performance (power and economy), better starting etc. Obviously this is my own honest opinion!
As for the bits, there are 2 sets of parts: the Ford EDIS system that you rip out of an old car in the scrappy for £10-15 (there are other sources) - see website for details! This is the electronic ignition!
You also need all the parts to make the Megajolt Lite Junior, which is the ignition advance (2D map) controller for the EDIS, which is essentially what this site is all about! The electronics to make the MJLJ cost about £50.
By the way, Guy Croft has an excellent book concerning the tuning of Fiat Twin Cam engines - inside it is an ignition map that I'm hoping to use!
For me it's been a very interesting project to date. Similar off the shelf products would cost about £400-£500 in the shops. Less hassle, less fun, a lot more expensive!!!
Hope this helps!
Well, everyone has their reasons. I have a Fiat 132 TC engine in a Triumph Spitfire and wanted to fit Twin Carbs using a straight inlet manifold. To do this I had to get rid of the block mounted distributor. To do that I needed electronic ignition etc. etc.
On reading up about (mappable) electronic ignition there are many benefits over the distributor.
1. Better and more reliable spark - distributors have points etc. that corrode and degrade with time.
2. Engine timing - the mjlj has a programmable 2D map for timing advance. It doesn't miss a beat. You can accurately time the ignition for engine speed and load. With a dizzy this is done using centrifugal advance (for engine speed) and vacuum for engine load, however, being mechanical this advance can be a little rough.
In essence you should benefit with better performance (power and economy), better starting etc. Obviously this is my own honest opinion!
As for the bits, there are 2 sets of parts: the Ford EDIS system that you rip out of an old car in the scrappy for £10-15 (there are other sources) - see website for details! This is the electronic ignition!
You also need all the parts to make the Megajolt Lite Junior, which is the ignition advance (2D map) controller for the EDIS, which is essentially what this site is all about! The electronics to make the MJLJ cost about £50.
By the way, Guy Croft has an excellent book concerning the tuning of Fiat Twin Cam engines - inside it is an ignition map that I'm hoping to use!
For me it's been a very interesting project to date. Similar off the shelf products would cost about £400-£500 in the shops. Less hassle, less fun, a lot more expensive!!!
Hope this helps!
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Richard oxley
- Posts: 0
- Joined: Wed Sep 22, 2004 11:28 am
benifits of mjlj
hi alain
just read u'r comment on mjlj system it's convinsted my to get the system ordered from guy. just a couple of questions, i am running a nova rally car with a 1300 vauxhall on 40's wich would be best TPS or MAP sensor??? also do u have or do u know were i can get a 2d map to program into it???
cheers
Rich
ps i am in Derbyshire if theres any one around there or in the midlands that i can talk to about getting the system built and set correct.. Also looking for a cheep laptop if anyone has got one.
just read u'r comment on mjlj system it's convinsted my to get the system ordered from guy. just a couple of questions, i am running a nova rally car with a 1300 vauxhall on 40's wich would be best TPS or MAP sensor??? also do u have or do u know were i can get a 2d map to program into it???
cheers
Rich
ps i am in Derbyshire if theres any one around there or in the midlands that i can talk to about getting the system built and set correct.. Also looking for a cheep laptop if anyone has got one.
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alainmengoli
- Posts: 0
- Joined: Tue Oct 05, 2004 11:29 pm
Is there anything that can co
Is there anything that can control the injectors/fuel? So the ignition is sorted but do you control the fuel in fuel injection do you get rid of the ecu or adapt it? Sorry getting very confused.
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alainmengoli
- Posts: 0
- Joined: Tue Oct 05, 2004 11:29 pm
Hi about Guy crofts book I fo
Hi about Guy crofts book I found out that the stopped publishing them so I was wondering if you had one for sale or wouldn't mind photocopying it for and I'll send you money for the effort.
Fuel/Injector Control
From what I understand you should use the project MegaSquirt (see links)- I believe you can keep the MJLJ to take care of the ignition.
Guy Croft's Book
Unfortunately I'm wanting to keep it, also unwilling to break Copyright (it wouldn't look good for me and my job!) - sorry to be a stickler for the rules.
My advise - buy a Haynes Manual (which will tell you how to strip and build an engine), buy a book on tuning petrol engines, go to Guy Croft's website (guy-croft.com). This will probably give you all the info you need to know.
Also might be worthwhile e-mailing Guy Croft personally to see whether he has any books. He's very helpful with advise as well.
Regards.
My advise - buy a Haynes Manual (which will tell you how to strip and build an engine), buy a book on tuning petrol engines, go to Guy Croft's website (guy-croft.com). This will probably give you all the info you need to know.
Also might be worthwhile e-mailing Guy Croft personally to see whether he has any books. He's very helpful with advise as well.
Regards.
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alainmengoli
- Posts: 0
- Joined: Tue Oct 05, 2004 11:29 pm
edowner could you please send
edowner could you please send me an email as I have tons of questions and it seems you have successfully used the system.?
07786862697
07786862697
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alainmengoli
- Posts: 0
- Joined: Tue Oct 05, 2004 11:29 pm
megajolt
Hiya again, Just to let you know thta I have decided to go with 44 idfs and the megajolt. Would you recommend getting the finished product for $150 or buy the bits and build it?
Can I use any ford parts or only parts of certain cars?
Can I use any ford parts or only parts of certain cars?
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twincamspit
- Posts: 3
- Joined: Sat Nov 22, 2008 4:44 pm
- Location: Oldham, Lancs
- Contact:
Re: Benefits of mjlj
Hi edowner,edowner wrote:Hi Alain,
Well, everyone has their reasons. I have a Fiat 132 TC engine in a Triumph Spitfire and wanted to fit Twin Carbs using a straight inlet manifold. To do this I had to get rid of the block mounted distributor. To do that I needed electronic ignition etc. etc.
On reading up about (mappable) electronic ignition there are many benefits over the distributor.
1. Better and more reliable spark - distributors have points etc. that corrode and degrade with time.
2. Engine timing - the mjlj has a programmable 2D map for timing advance. It doesn't miss a beat. You can accurately time the ignition for engine speed and load. With a dizzy this is done using centrifugal advance (for engine speed) and vacuum for engine load, however, being mechanical this advance can be a little rough.
In essence you should benefit with better performance (power and economy), better starting etc. Obviously this is my own honest opinion!
As for the bits, there are 2 sets of parts: the Ford EDIS system that you rip out of an old car in the scrappy for £10-15 (there are other sources) - see website for details! This is the electronic ignition!
You also need all the parts to make the Megajolt Lite Junior, which is the ignition advance (2D map) controller for the EDIS, which is essentially what this site is all about! The electronics to make the MJLJ cost about £50.
By the way, Guy Croft has an excellent book concerning the tuning of Fiat Twin Cam engines - inside it is an ignition map that I'm hoping to use!
For me it's been a very interesting project to date. Similar off the shelf products would cost about £400-£500 in the shops. Less hassle, less fun, a lot more expensive!!!
Hope this helps!
Sounds great. I also have a Fiat 132 engine and 'box in a Spitfire. I've used the offset manifold to clear the dizzy to fit twin DCOE40s, but I'm still interested in the Megajolt....
I've downloaded the standard '2 litre Fiat DOHC' map but thought that if you'd already got a 1756cc version for twin 40s you might want to share it? (bit cheeky but don't get if you don't ask!)
Cheers,
Richard (twincamspit)