mrcheese Posted June 25, 2007 Share Posted June 25, 2007 Hello, I am new to this forum so I hope I am posting in the right place. I am thinking of using Megajolt on an EDIS set up. The dizzy is the weak link when it comes to water! I have a 3.5efi and the flapper AFM. Has anyone done the same? Looking at it, I will need a signal to drive pin one of the ECU (RPM). Will the tacho out on Megajolt do the job? Anything else I should know on the set up? Regards, Paul. Quote Link to comment Share on other sites More sharing options...
missingsid Posted June 25, 2007 Share Posted June 25, 2007 Hello,I am new to this forum so I hope I am posting in the right place. I am thinking of using Megajolt on an EDIS set up. The dizzy is the weak link when it comes to water! I have a 3.5efi and the flapper AFM. Has anyone done the same? Looking at it, I will need a signal to drive pin one of the ECU (RPM). Will the tacho out on Megajolt do the job? Anything else I should know on the set up? Regards, Paul. Hi Paul If you wait patiently Nige will be along and he has a bit of experience In the mean time have a look here Marc Quote Link to comment Share on other sites More sharing options...
waveydave Posted June 25, 2007 Share Posted June 25, 2007 Hi Paul See you can run but you cant hide Sorry dont have any answers about mega jolt cos i dont do V8's (as you know ) Wavey. Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted June 25, 2007 Share Posted June 25, 2007 Hiya, 1st I am not the man to ask re ANYTHING electrical I am to PCBs Electrics and crimping connections what the Incredible Hulk is to watch repairing What Fridge BBC and Jon White between them know means you'll not have a huge prob, with therse guys help I did mine, ....I leant a huge amount but frankly count me out unless you want an electrical fire The post was as much a thankyou as a "How to", but it was from help from this forum I got there, without it I doubt I would have, and hence why having been so impressed I am now going Full Squirt to get rid (oh I pray) of the misfire. There is a whizzy tricky thing you'll need to do to get the ECU to fire from the Edis, but a grown up will be along to explain, it involves solder and a 3p thingumyelectricaldodahbit and then it fires Nige Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted June 25, 2007 Share Posted June 25, 2007 Yes, wot Nige said, you need some diodes to make the ECU trigger correctly from multiple coils rather than a single coil. Having said that, I would (you'll be surprised to hear) say it's worth ditching the flapper ECU too and just fitting a full MegaSquirt. BTW I have some EDIS-8 units for sale at the moment if you need one Quote Link to comment Share on other sites More sharing options...
Bull Bar Cowboy Posted June 25, 2007 Share Posted June 25, 2007 Yes, you will need to use diode sniffers from the coil packs as the 14CU pin 1 input requires a fast spike of several hundred volts …………the existing in line resistor is there to ensure that low voltage spikes do not cause false triggering. However, the internal circuit of the ECU has an RC pulse shaper that is designed to only output from a high level spike. Ian Quote Link to comment Share on other sites More sharing options...
MECCANO Posted June 26, 2007 Share Posted June 26, 2007 RC pulse shaper that is designed to only output from a high level spike. An RC high pass filter? Quote Link to comment Share on other sites More sharing options...
Bull Bar Cowboy Posted June 26, 2007 Share Posted June 26, 2007 Not a high pass filter as such .................... its just using the RC time constant to shape up the pulse so that the chips can understand whats going on ................ remember, these chip are 20 year old technology ............... you could probably walk faster than any pulse they are likely to see......... Looking at the circuit I would have assumed that the rising edge was too fast for the chips in those early days so Mr Lucarse reverted to good old discreet technology to solve the problem..................... Ian Quote Link to comment Share on other sites More sharing options...
HoSS Posted June 26, 2007 Share Posted June 26, 2007 i have a megajolt to sell - brand new, built but never used, pm me Quote Link to comment Share on other sites More sharing options...
mrcheese Posted June 27, 2007 Author Share Posted June 27, 2007 i have a megajolt to sell - brand new, built but never used, pm me I think that I sent you a PM. Paul. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.