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Slantedbrain
TBI Slant 6
Joined: 08 Aug 2005
Posts: 186
Location: Pittsburgh, PA
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Post subject:
Distrubutorless Ignition Systems
(Tue Feb 20, 2007 2:44 pm)
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Would the conversion of our engine to a D.I.S. require a distributor plug or other fabrication? What I'm trying to figure out is if anything will be damged by the removal of the distributor and simply putting a plug in its place. I've seen this done for VW's but I just don't know about slants._________________ 
The old white brick |
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emsvitil
Supercharged
Joined: 12 May 2005
Posts: 4717
Location: So California
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Post subject:
(Tue Feb 20, 2007 2:47 pm)
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All you should need is something to cover/plug up the hole........._________________ Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes
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Sam Powell
Supercharged
Joined: 04 Jun 2006
Posts: 3169
Location: Gaithersburg MD
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Post subject:
(Tue Feb 20, 2007 4:38 pm)
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Tell us a little more about the kind of system you are considering using.
Sam_________________ A REAL professional is someone who knows when to hit it with a bigger hammer.
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Slantedbrain
TBI Slant 6
Joined: 08 Aug 2005
Posts: 186
Location: Pittsburgh, PA
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Post subject:
(Tue Feb 20, 2007 4:53 pm)
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Thanks Ed, that's what I was hoping for. As for which system, I was strongly considering Ford's EDIS to handle the ignition._________________
The old white brick |
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cmexlr8
3 Deuce Webber
Joined: 04 Oct 2006
Posts: 69
Location: chatsworth, ga
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Post subject:
(Tue Feb 20, 2007 5:23 pm)
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| what will you use for a trigger?
_________________
69 valiant
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Matt Cramer
Board Sponsor
Joined: 01 Nov 2002
Posts: 1516
Location: Oxford, Georgia
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Post subject:
(Tue Feb 20, 2007 7:23 pm)
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EDIS will require a 36-1 trigger on the crank pulley and a VR sensor. I'm planning to do this eventually and have gathered the EDIS module and an Interpid coil pack already. Just need to get the trigger wheel.
I don't see any problem with plugging the distributor hole. The distributor gear on a slant only drives the distributor. |
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Pierre
Board Sponsor
Joined: 08 Feb 2003
Posts: 3641
Location: CA
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Post subject:
(Tue Feb 20, 2007 7:29 pm)
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You can buy the ford trigger wheel new from napa. Easier then fussing with a puller at a junkyard. Think the ones I bought were less then $15.
Are you going to use MS or some other computer to drive the ford module?
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Slantedbrain
TBI Slant 6
Joined: 08 Aug 2005
Posts: 186
Location: Pittsburgh, PA
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Post subject:
(Tue Feb 20, 2007 7:58 pm)
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I plan on eventually using MS to control Fuel and spark, I'll start with spark while i get the fuel side sorted, plumbed, etc..._________________
The old white brick |
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Sam Powell
Supercharged
Joined: 04 Jun 2006
Posts: 3169
Location: Gaithersburg MD
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Post subject:
(Tue Feb 20, 2007 8:12 pm)
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What does the acronym EDIS stand for? Can you point us towards a web site or diagragm of how it works? How would you retrofit it to your slant? How many coils does it have? Is it a coil pack set up? I must say that most of the newer ignition systems are really unkown to me. I understand the old points and coil, the electronic ignition of Mopar style, and the Hall effect ignition, but all of these have a distributor that routes the spark to the proper plug through a rotating rotor and with a distributor cap. Can anyone enlighten me/us here. I am sure I am not the only one left in the dark.
Sam_________________ A REAL professional is someone who knows when to hit it with a bigger hammer.
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Slantedbrain
TBI Slant 6
Joined: 08 Aug 2005
Posts: 186
Location: Pittsburgh, PA
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Post subject:
(Wed Feb 21, 2007 2:32 pm)
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Actually you'll probably get more info from google on this subject than from me. EDIS stands for Electronic Distributorless Ignition System. Found this. Hope that helps. It uses a coil pack and it triggered by a 36-1 wheel placed on the damper/crank pully, which triggers a VR sensor. You do need a computer to control it, like megasquirt, or you'll just get a 10 deg advance signal, which is the unit's Limp Home mode. to retrofit the slant, you'd need a coil pack, wires, an EDIS module, a spark management system to do your timing curve, and the related wiring harnesses. It lets you chuck the distributor, which is one less part that I know I can break._________________
The old white brick |
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Pierre
Board Sponsor
Joined: 08 Feb 2003
Posts: 3641
Location: CA
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zedpapa
EFI Slant 6
Joined: 12 Aug 2004
Posts: 300
Location: San Diego
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Post subject:
(Mon Mar 19, 2007 6:42 pm)
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the distributor gear on the cam also drives the oil pump, right? why did you choose the ford system? i had considered building a DIS using MSD parts. i was going have the flywheel indexed to the crank and have three magnets installed. i figure a hole could be made on the right side of the engine back there where a pick up could be mounted. i have been told that the further out the magnets can be placed the more accurate the timing can be. thoughts?
zedpapa
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1970 dodge dart w/225 /6 bored .040" over, holley 390cfm w/vac. sec., compcams 252s, clifford shorty headers w/2.5" exhaust w/flowmaster, f-body 11" front discs, aluminum A-833OD, 8 1/4 w/3.21 SG
soon to have 5 gears!!!
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Slantedbrain
TBI Slant 6
Joined: 08 Aug 2005
Posts: 186
Location: Pittsburgh, PA
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Post subject:
(Mon Mar 19, 2007 7:46 pm)
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I don't know truthfully, that's what the original intent of this thread was, but I seem to have been idealogically hijacked by a technical question. I chose the Ford system, becuase of price and availability, and available informational resources for set up. Truthfully, I know next to nothing about a flying magnet setup like you're considering. But yes, having a greater rotational distance between your magnets should allow for a higher accuracy of timing, that or use smaller magnets._________________
The old white brick |
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mpgmike
TBI Slant 6
Joined: 16 Jul 2006
Posts: 214
Location: NW New Jersey
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Post subject:
(Tue Mar 20, 2007 7:44 am)
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All the DIS support from MegaSquirt is geared toward the Ford EDIS. That might be one reason.
Mike
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Recognized by US Federal Courts as a Fuel Economy Expert!
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Matt Cramer
Board Sponsor
Joined: 01 Nov 2002
Posts: 1516
Location: Oxford, Georgia
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Post subject:
(Tue Mar 20, 2007 9:55 am)
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| zedpapa wrote: | the distributor gear on the cam also drives the oil pump, right? why did you choose the ford system? i had considered building a DIS using MSD parts. i was going have the flywheel indexed to the crank and have three magnets installed. i figure a hole could be made on the right side of the engine back there where a pick up could be mounted. i have been told that the further out the magnets can be placed the more accurate the timing can be. thoughts?
zedpapa |
The cam distributor gear drives the oil pump - the gear on the distributor doesn't, unlike many V8s. The oil pump has a separate drive gear.
EDIS is pretty straightforward to get up and going, but Megasquirt-I (and soon, Megasquirt-II) can drive other DIS systems by operating the coils directly. You do need some means of identifying the cylinders, so a 3 tooth wheel will only work if you add some sort of second trigger to identify the cylinder.
A large diameter wheel can boost accuracy a bit, but once you get past a certain point it doesn't really help. Some systems such as EDIS and Megasquirt-II can gain more accuracy from a wheel with more teeth, too. |
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