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  #1  
Old 03-08-2016, 11:01 AM
Frank from Quebec Frank from Quebec is offline
 
Join Date: Mar 2016
Location: Canada
Posts: 7
Default Ford edis with megajolt

Hi guys,

Not specific to RV's but looking on the net your group is clearly the most active about the subject !!

I am rebuilding an aircraft with a Continental O-300 6 cylinder engine and will be using dual Ford edis system managed by 2 programable Megajolt boxes.

I have not found much about people using this system on aircraft but it sure make sense to me !!

You have a 10 x 10 window of RPM and load to play with and the possibility to have 2 different map swithable on the fly.

Here is the link to the maker: https://www.autosportlabs.net/MegaJolt_Lite_Jr.

And a picture of my ignition map while running the whole system spinning the trigger wheel with and holding the sensor in the toolpost on my lathe:


It seems to be very accurate with a timing light on the chuck and very tolerant to sensor to Wheel clearance, up to 1/4 inch no problem and no shift in timing.

Hope you like it and open to comments

Frank

Last edited by Frank from Quebec : 03-08-2016 at 01:40 PM.
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  #2  
Old 03-08-2016, 11:09 AM
Mike S's Avatar
Mike S Mike S is online now
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 13,593
Default Welcome to VAF!

Frank, welcome aboard the good ship VAF

The Ford/Megajolt thing is very promising, looking forward to seeing your setup.
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Mike Starkey
VAF 909

Rv-10, N210LM.

Flying as of 12/4/2010

Phase 1 done, 2/4/2011

Sold after 240+ wonderful hours of flight.

"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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  #3  
Old 03-08-2016, 11:56 AM
6 Gun 6 Gun is offline
 
Join Date: Jun 2005
Posts: 750
Smile Megajolt

I think your on to something here Frank keep us posted.
Bob
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  #4  
Old 03-08-2016, 02:04 PM
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DanH DanH is offline
 
Join Date: Oct 2005
Location: 08A
Posts: 7,193
Default

We're flying two EDIS systems locally, on an RV-8 and a Mustang II.

The Mustang's parallel valve 360 is triggered with a toothed wheel behind the ring gear, and the standard Ford sensor. I'm running an IO-390 with a mag hole trigger based on an ND reluctor, which is conceptually similar to an Electroair trigger. Both aircraft retain one magneto for now, a conservative approach to testing a new ignition system, but so far it looks like both of us will go dual eventually...already built/bought the needed parts. There are a few others following along.

A very complete EDIS/Megajolt article can be found in the British LAA magazine, August 2011. Author's name is Steve Brown. Steve apparently did quite a lot of bench testing per English homebuilding rules. I'll write something for Kitplanes in due course.

Reluctor-based systems are old tech, but work fine. Ford has sold millions of EDIS ignition units worldwide, in 4, 6, and 8 cylinder versions. They're considered very reliable, and operate independently, delivering spark at 10 BTDC if the timing computer goes on the fritz. The EDIS module can be mounted on the hot side of the firewall. However, it's just as easy to put it inside the airplane, with the Megajolt control computer, where it can live a life of luxury. In that case, there are no electronics mounted firewall forward, just the pickups (a magnet and some wire) and the coils (iron and some wire).

A late model Ford EDIS coil pack will look extremely familiar to P-mag owners. I elected to use an earlier style, just because it incorporates positive terminal retention.

I've discussed aircraft use with Brent Picasso at Autosport, who produces the little Megajolt controller. Brent is ok with experimental use, as long as everyone understands the controller was not designed or intended specifically for aircraft. The intended use is converting points-equipped fun cars to EI.

The components, leveraged as they are from automotive production numbers, are downright cheap when priced in AMU's (Aircraft Monetary Units). One of our intrepid VAF'ers bought all the Ford components for two complete ignitions at the local wrecking yard; the bill was $60. You can also buy everything new if you wish, from the usual auto parts sources. Autosport's Megajolt control units are currently $169 each, but Brent has been known to put them on sale. You'll need a laptop for setup. The software is dirt simple.

I had not intended to say much here until flying 50 hours or so; right now I'm at about 10. So, no concrete endorsement yet, although the system is working well. If you want to know more, start by downloading the Megajolt installation and operating files at:

https://www.autosportlabs.com/produc...jolt-ignition/

Like everything else in EAB these days, some builders will prefer to buy a complete kit with detailed instructions, while others will happily build whatever they want. I don't expect EDIS installations to put a dent in sales at SDS, Lightspeed, or Electroair, but it certainly appears to be a viable alternative for the DIY-minded.









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RV-8 SS
Barrett IO-390

Last edited by DanH : 03-09-2016 at 01:01 PM.
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  #5  
Old 03-08-2016, 02:22 PM
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Mike S Mike S is online now
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Default

Quote:
Originally Posted by DanH View Post
We're flying two EDIS systems locally, on an RV-8 and a Mustang II.

Glad you finally came out of the closet Dan
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Mike Starkey
VAF 909

Rv-10, N210LM.

Flying as of 12/4/2010

Phase 1 done, 2/4/2011

Sold after 240+ wonderful hours of flight.

"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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  #6  
Old 03-08-2016, 02:37 PM
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DanH DanH is offline
 
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Quote:
Originally Posted by Mike S View Post
Glad you finally came out of the closet Dan
Yeah, yeah...

Hey, I'm out before the P-mag for a 6-cylinder, and you can afford it on a poor old fireman's pension
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RV-8 SS
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  #7  
Old 04-01-2016, 02:57 PM
airtractor8 airtractor8 is offline
 
Join Date: Mar 2006
Location: Dardanup. Western Australia
Posts: 132
Default

Quote:
Originally Posted by lr172 View Post
I am curious how you are planning to center this ring. I am sure you know this, but the air gap between the sensor and the teeth generally needs to be in the .010 - .045 (varies by sensor) range for each tooth (I don't know requirement for the EDIS module). Tighter is better, but you have to leave some room for movement with worn bearings. I would be a little concerned that the flange may not be exactly centered. I would expect the tolerance for the pulley to be a tad loose and there would be no precision tolerance required for interior of the cast boss. IF that flange is machined, that's a different story, but you still don't know that tolerance. Maybe a michanest would know.

Let us know how it works out.

Larry
This from the OP in regards tolerances.

Quote:
Originally Posted by Frank from Quebec View Post
It seems to be very accurate with a timing light on the chuck and very tolerant to sensor to Wheel clearance, up to 1/4 inch no problem and no shift in timing.

Hope you like it and open to comments

Frank
It doesn't seem like the reluctor to pickup clearance will be a problem. Yes the mounting surface has been machined by Lycoming.

I spoke with a machinist today about getting the holes drilled in the flywheel.
He was more worried about how accurate the holes in the wheel were and didn't see a problem with getting his part of the job done per the drawing on a CNC machine.
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  #8  
Old 04-01-2016, 04:17 PM
SHIPCHIEF SHIPCHIEF is offline
 
Join Date: Mar 2008
Location: Seattle
Posts: 1,315
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I have one 12 pin connector, as removed from a car. It has about 2" of wire to the cut off point. I think the connector could be disassembled and new pin sockets crimped onto my wire, then inserted into the old shell. I (like Airtractor8) ask: Does anyone know what kind and size connector?
I would have a lot more confidence with new hardware.
Here is site that shows the disassemble of the EDIS connectors:
http://www.ken555.plus.com/gtm/connectors.html
A link to Megasquirt's EDIS page:
http://www.megamanual.com/ms2/EDIS.htm
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Scott Emery
http://gallery.eaa326.org/v/members/semery/
EAA 668340, chapter 326 & IAC chapter 67
RV-8 N89SE first flight 12/26/2013
Yak55M, and the wife has an RV-4
There is nothing-absolute nothing-half so much worth doing as simply messing around with Aeroplanes
(with apologies to Ratty)

Last edited by SHIPCHIEF : 04-01-2016 at 04:38 PM.
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  #9  
Old 04-01-2016, 10:56 PM
SHIPCHIEF SHIPCHIEF is offline
 
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Location: Seattle
Posts: 1,315
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Well!
I just got a chance to take the cowl cheek off my T-18, it has a small diameter pulley like my RV-8 does. There is very little room for a timing wheel or a stock Ford EDIS pickup in there.
The only choices ( 4 cylinder Lycoming) appear to be the 'outside the flywheel pulley" timing wheel or the magneto replacement pickup when equipped with the small diameter pulley flywheel.
__________________
Scott Emery
http://gallery.eaa326.org/v/members/semery/
EAA 668340, chapter 326 & IAC chapter 67
RV-8 N89SE first flight 12/26/2013
Yak55M, and the wife has an RV-4
There is nothing-absolute nothing-half so much worth doing as simply messing around with Aeroplanes
(with apologies to Ratty)

Last edited by SHIPCHIEF : 04-01-2016 at 11:04 PM.
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  #10  
Old 04-02-2016, 10:22 PM
airtractor8 airtractor8 is offline
 
Join Date: Mar 2006
Location: Dardanup. Western Australia
Posts: 132
Default Replacement module pins

Quote:
Originally Posted by SHIPCHIEF View Post
I think the connector could be disassembled and new pin sockets crimped onto my wire, then inserted into the old shell
I may have found a few sources for new module pins.
I think this is their name and part number: Ford Wedgelock Terminals E7EB-14487-AA .060" Female Diameter Pin. Available on ebay here http://www.ebay.com/itm/10-Ford-Wedg...item51e0525b6d
The same guys have a great price on NEW 8cylinder module plugs(you will have to remove the keys to use on 4&6 cyl ) Here:
http://www.ebay.com/itm/400324998067...MakeTrack=true




OR these:

http://www.autoparts-factory.net/pro...tang-1669.html
These are from an 86-09 Mustang Oxygen Sensor plug. They look strikingly similar and are from the same era vehicle.Only available in 200pc lots
These guys also have lots of pins. Some with dimension drawings. The TE1233 could be it?. There is others http://parts.harnessmaster.com/?cate...Lugs&pictures=




I can't tell you how much time I have wasted on this small Item but I just HATE having to join cables on a new installation and especially an ignition system...in an aeroplane

Last edited by airtractor8 : 04-03-2016 at 01:46 AM.
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