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Megajolt - anyone used it?BenzBoy
@benzboy
Club Retro Rides Member 7
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Mar 24, 2008 10:17:51 GMT
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I was looking at running Megajolt mappable ignition. The kit looks fairly cheap and easy to use. Has anyone used it, or thinking of using it? For those who haven't come across Megajolt, it's a fully mappable ignition control unit which replaces the dizzy etc with Ford EDIS coil packs. More info hereIt means that you can program the best amount of ignition advance for any given engine condition (and ignition retard for when the turbo kicks in ) The kit looks good value for money. I know you can use Megasquirt to control ignition too, and I have a Megasquirt kit, however I can't run injection on my engine (siamese ports y'see) so I think there wouldn't be a lot of point in that. So yeah... anyone using it? Or thinking of using it?
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Mar 24, 2008 10:26:37 GMT
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Only used Megasquirt, but i'd be up for a learning experience if you want some help
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205 GTi Mi16
205 XS - Now in filmidget's signature
Clio dci 80
I've found in life if someone is an idiot, they generally stay and idiot.
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Mar 24, 2008 10:27:56 GMT
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Sure you can run injection on a Siamese port engine! Just use batch injection instead of sequential. The difference between the two is negligible really.
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Mar 24, 2008 11:26:53 GMT
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I have it but didnt use it...
Interested in an unused one? Pm me!
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stealthstylz
Club Retro Rides Member
Posts: 14,924
Club RR Member Number: 174
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Megajolt - anyone used it?stealthstylz
@stealthstylz
Club Retro Rides Member 174
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Mar 24, 2008 12:07:01 GMT
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I'm planning on using it on my Fiat engine.
Autovaz you have a PM.
Matt
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Mar 24, 2008 13:06:26 GMT
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Not used it but I really want to get into it and I'll be reading with interest
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Mar 24, 2008 13:12:58 GMT
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Megajolt - anyone used it?BenzBoy
@benzboy
Club Retro Rides Member 7
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Mar 24, 2008 13:16:22 GMT
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I figured that it would be the best way to avoid detonation on a boosted engine. And seemed a lot easier to me than either rigging up some sort of boost-advance mechanism on the dizzy, or retarding the ignition to stop det and having it not optimised for off-boost running.
I could use the Megasquirt, but having to sort out the fuelling as well as everything else will ensure that I'll never finish the project... I'm trying to keep the list of jobs to do to a minimum so I stand a chance of getting it to the shows this summer ;D
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Mr S
Posted a lot
10-4 Good buddy.
Posts: 2,654
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Mar 24, 2008 13:23:40 GMT
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I'm gonna be using it on my Merc 190 project (well, megasquirt 'n' spark) - already got the EDIS 8 module from the states - just waiting to build me garage so I can get on with it! lol
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Suzuki GSXR1000 K2 BMW R1150GS BMW K1200RS Chevy K5 Blazer Chevy Suburban LT Jaguar XKR
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Mar 24, 2008 14:03:53 GMT
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I use megasquirt n spark as well.. using EDIS to do the business bit pf timing the crank and delivering the sparks..You can wire megasquirt/megajolt to do it all, without an edis, but I prefer using the modules for 2 reasons... !/ it has a limp home mode... defaults to 10deg advance if the ECU stops sending a signal 2/ I can use the same megasquirt to control 4,6 and 8 pot engines without doing surgery on it, I just swap the EDIS and do a code load Makes for easier development work! Incidentally, edis-8 is rather rare in this country, some folk are using two edis-4's instead..
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To get a standard A40 this low, you'd have to dig a hole to put it in
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Mar 24, 2008 14:28:14 GMT
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Try www.canems.co.uk for info on siamese FI he has throttle bodies on a 998cc mini and it flys, also verygood to e-mail for info.
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madmog
Club Retro Rides Member
Posts: 1,160
Club RR Member Number: 46
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Megajolt - anyone used it?madmog
@madmog
Club Retro Rides Member 46
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Mar 24, 2008 15:23:54 GMT
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I've built and got working a Megajolt and Megasquirt but used neither yet. The Megasquirt could be used just to control ignition until you wanted to convert to injection but you could always sell the megajolt and buy a megasquirt later. For the megajolt (and megasquirt) I'm going to use EDIS but I will also leave the original distributer in place with correctly set points in case the Megajolt ever fails. Just my paranoia. I got my megajolt kit from here: www.autosportlabs.net have a look at their assembly guide as it give you an idea of the amount of work involved in self-assembly. According to their site, knock-sensing is not yet part of the program - I don't know if there are other versions or program modifications which would allow the curve to react to knock... Just found this: www.autosportlabs.net/MJLJ_Frequently_Asked_Questions#Knock_Controlwhich may be useful
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Megajolt - anyone used it?BenzBoy
@benzboy
Club Retro Rides Member 7
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Mar 24, 2008 15:52:04 GMT
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Knock sensing would be ideal, I'm sure that there will be an add-on on later versions.
I think I'll keep the Megasquirt kit for another engine - I really want to stick with a carb for this application as it will just make things a little simpler and perhaps even achievable! I'm just paranoid as last time I embarked on a big engine modifying project the thing just got bigger and bigger until it didn't get off the ground at all.
Plus I'd like to start with an 8-port, injected engine to convert to MS. No fabbing manifolds, the right number of ports... But that's for another time! ;D
If I can get the funds together I'll try to stretch to a ready-built unit. They're $130 as opposed to $80-or so, with the MAP sensor needed for turbo applications, but it just means it'll be ready to plug in and start playing with it.
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madmog
Club Retro Rides Member
Posts: 1,160
Club RR Member Number: 46
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Megajolt - anyone used it?madmog
@madmog
Club Retro Rides Member 46
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Mar 24, 2008 18:04:25 GMT
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Long story short, I've changed plans from Megasquirt to Megajolt for the same reason. Starting out with a carbed engine, it's a lot cheaper to upgrade to bike carbs than F.I. once you factor in the extra sensors, high pressure fuel pump and lines. It may be possible to build a separate knock sensor circuit connected up to a lamp/buzzer as an interim step. Something started here: www.impconcepts.com/espritv8knocksensoralarm.htmbut not finished so far.. Is there a difference between the MAP sensor for turbo and n/a applications? I've built the map sensor as opposed to throttle position sensor even though the bike carbs have a tps. To make this accurate I'll have to run a vacuum line across all four intakes, through a small plenum (fuel filter will do apparently) to the map sensor. Oh, the Megajolt is very easy to put together (the Megasquirt a bit more involved). Maybe see how you get on knocking up a cheap Velleman kit from Maplin for £5-7 in the bargain bin. If you can do that easily, you can do a Megajolt.
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Megajolt - anyone used it?BenzBoy
@benzboy
Club Retro Rides Member 7
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Mar 24, 2008 18:36:36 GMT
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Is there a difference between the MAP sensor for turbo and n/a applications? I've built the map sensor as opposed to throttle position sensor even though the bike carbs have a tps. To make this accurate I'll have to run a vacuum line across all four intakes, through a small plenum (fuel filter will do apparently) to the map sensor. Oh, the Megajolt is very easy to put together (the Megasquirt a bit more involved). Maybe see how you get on knocking up a cheap Velleman kit from Maplin for £5-7 in the bargain bin. If you can do that easily, you can do a Megajolt. The MAP sensor on the Megajolt kit definitely works with turbos, and is the same one whether running a turbo or NA. If you're turbocharging it then I would think that with the TPS set-up you'd be guessing at the on-boost ignition timing as the brain wouldn't know if you were on-boost or not. Like you say, you can build a plenum to get the vac / boost line from. Bit more involved than running a TPS but I think much more suitable. I built a Velleman kit to practice my soldering on, and like you say the Megajolt kit doesn't seem half as complex as Megasquirt. Good call on the knock-sensor alarm - that looks handy. I was looking into hooking up a Lambda sensor with some sort of display to warn me when it's leaning out but it's fairly complicated and I really need to keep things as simple as possible! ;D
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Last Edit: Mar 24, 2008 18:38:57 GMT by BenzBoy
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Mar 24, 2008 19:44:50 GMT
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Why not use your megasquirt to control just the ignition at first then add the injection later. Thats how i had mine running on the cortina. Just had power in and two wires out to the edis module. Worked a treat.
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madmog
Club Retro Rides Member
Posts: 1,160
Club RR Member Number: 46
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Megajolt - anyone used it?madmog
@madmog
Club Retro Rides Member 46
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Mar 24, 2008 19:57:50 GMT
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If anything the Megajolt is easier than Velleman as the components aren't so squashed in and the instructions are much easier and in correct English with voltage tests at several stages. www.autosportlabs.net/MJLJ_V3_kit_assembly_guideI read a lot on TPS vs MAP and figured MAP would be best for me - cheaper to I think. Oh, if you don't have a serial port on your computer you'll need a usb to serial convertor. I used this: www.targus.com/uk/product_details.asp?sku=PA088Eand it worked fine - I'm sure you'll pick one up cheaper by looking around.
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mercmad
Posted a lot
Flush Hard,it's a long way to McDonalds.
Posts: 1,740
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Mar 24, 2008 21:29:17 GMT
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Mercboy ,I have Megajolt on one of my Mercs ( a 6.3) insterad of it's ancinet twin point dissy. it's FANTASTIC!!. instant start,zero preigniton ,and reallly simple to assemble once you have every thing in place. I used Ford DEIS modules ( 2) but you can buy new bewtter versions from Accel etc. Some guys have used Chrysler modules calso whicjh are supposed to be better.The megajolt will fire anything if you are prepared to tinker. I see some ASton Martin types have installed it on DBS V8 's in the UK to make them easier to start so it must be good right? cheers! ;D ;D ;D
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Many years ago I changed my driving style to cope with rising fuel prices; I have now reached the stage where I am contemplating keeping my eyes shut in order to lower wind resistance.
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