mega jolt lite junior
Turbo Mini Forums

just read an article in retro cars about a fully mapable ditributerless ignition system called mega jolt. anybody on here used it? the chap developed it for his turbo mr2 so i would imagine it would be ok for using on a mini turbo. i am seriously considering buying one of these kits, they reckon you can put it together and get it working for ?120ish quid, but ive got a mate who works in a garage, so i get free picking through the crashed cars that come in, so ireckon i can do it for more like ?50-60, just wondering if there is any obvios reason why it wouldnt work??

website.... www.picasso.org/mjlj

Cheers,

Pete

And on the 7th day........... God created turbochargers!

matt over at 16vminiclub has experience with mega squirt, so may be worth asking him? I wil be considering it too if/when i ever get around to turbo-ing!

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

I'm sure when my bro reads this he'll put a post up. As far as I know this is the system he has fitted on his NA mini; but it is soon to be fitted to our hillclimb turbo mini.

Wil

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

Mega jolt could be used no problem and is a reasonable mapable ignition system. It gives you a good number of load sites to create a decent ignition map from (100 I think)

As already mentioned we have plumped for the megasquirt & Edis. This only gives 49 load sights, but it is much better than any distributor. There is a new megasquirt in development at the moment and this will give 144 load sights and can be added to the current megasquirt. I built my board and got all the kit together for about £100. So far it has work faultlessly and will be fitted to the turbo ready for next season.

The two limiting factors:
1. maximum boost with the standard sensors is 21.6 psi, although this can be changed to 30psi reasonably easially.
2. Max rpm is about 8000. Not a real problem on an A series turbo.

An advantage is that it will allow us to do the ingection (7 port head before anybody goes funny) when we get round to it.

To be honest I am supprised that more people on this forum have not given it a go.

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

Looks good, might just give this ago myself!

Whats do you reckon is the simplest solution for a crank sensor on a mini?

acccording the the article in retro cars, its seems that you can weld a sierra sensor ring off the crankshaft pulley, then position the sensor in the handilly provided slot on the timing chain cover.

ben, or anybody else for that matter, i have a few questions that are going to make me look stupid but id rather ask them now than regret not asking them later.....


load sites? what are these......

is this reasonablly easy to set up to run? i rrealise that it is likely to take a considerable amount of time on a rolling road to get set up to gain the maximum advantage, but....

megasquirt and edis... what is the differencre between using the megajolt kit and the megasquirt kit? i understood that the megasquirt was used for fuel injection, i presume from your refrence that it can also be used for the sparking side of things. as far as i can see, they are both build your own, and both use the ford EDIS module bits.

what are the major differences between this kit and some of the mega-bucks ones run by people (including i believe a few from this forum..) i realise that the more expensive ones are ready built, but what are the other major differences?

i am going to be using this on a mildly tuned turbo, primarily to aviod the hassle of haveing to modify distibutors every time i make a mod, and also to gain the extra spacce at the front of the engine. am i wasting my time, or would i see a benefit in terms of tunability as and when i change factors.

appoligies for all of the questions, but i like to know what im getting myself into.......

Many thanks,

Pete

And on the 7th day........... God created turbochargers!

Well I'm not going to rewrite all that has been written on megasquirt, but here is what I know and some links to where I found it all out.

Firstly the crank sensor. I got one off the front of a sierra and the sensor to go with it. I have mounted it using the crank pully off a mini that has the big weighty bit on, I got it turned down to suit and stuck it on with some glue. I might be adding a grub screw to it at some point, to fix it more securely. See the picture below for how I mounted the crank sensor. It is a bit of a trial at the moment so looks a bit rough:

http://members.lycos.co.uk/hamerhamerracin...bimg/Wheel1.JPG

Load site: Not sure if I am using the correct term, but basically the ignition advance is calculated from a matrix of RPM verses MAP (Manifold Air Pressure). The mega jolt has a 10x10 matrix and the megasquirt has a 7x7 matrix. Obviously the bigger the matrix the more accurately and better the engine can be tuned.

EDIS is a ford ignition controlled to find out how it works check out:

http://www.bgsoflex.com/mjl/mjl_edis_summary.html

There is not a huge difference between the two kits, I personally would go for megasquirt as it has been around much longer and most bugs have been fixed, the megajolt is still quite new.

There are no major differences between any of the ignition controllers on the market. They all control ignition and they all work fine, more or less. Obviously you have to build it yourself and there is no warranty with it. For lots more information on megasquirt:

http://www.megasquirt.info/index.html

I would definitely recommend it for any turbo engine for all the reasons you mention plus improved economy.

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

nutter driver if you have a poke around on the megasquirt site there’s a company which will sell u a fully assembled unit with loom etc and 1 years limited warranty for under £300 inc P&P (US based assume they'll ship to UK)

System looks good far far cheaper then any of the other systems on the marked will definitely be looking into this if I ever get round to doing an 7/8 port turbo.

Ben and Wil please post info on project progress as I’m sure lots will be interested

thanks a lot guys, much appreciated!

And on the 7th day........... God created turbochargers!

I'd like to know when the "real" megajolt will be finished.
I wait for knock detection!!!!!!

French turbocharged 998cc

It's around 5 weeks since I first read this post, and today I completed my Mega Jolt instalation!!!

Got to say suprisingly everything went to plan and worked first time with no de-bugging!

The hardest bit was mounting the crank sensor!

All I need now is a starting point for the map before I drive the car. If no one can suggest one, then could someone please tell me what the standard metro dizzy curve is?

P+P and Vat were a bit pricy, but I recon the complete install cost easily less than 100 notes.

If I were to do it again now, I recon I could half the cost with a bit more work and localy sourced components.

Just the knock detection left now......

The man Vizard recommends that a non turbo engine needs around 35 degrees total advance and for every PSI of boost this should be retarded by 1.1 degrees (so at 10psi you should be running around 24 degrees total advance). I think that if you stick to around 20 to 24 degrees total advance you should be safe to drive and have a play.
If you start out at idle (1000rpm) with around 15 degrees and advance this to 24 degrees by 3000rpm and hold it till redline you should have a good starting place.

Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe.

Wow thanks for this just what I was looking for a 10x10 load bins

What RPM range does everyone use for the 10 load bins?

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!