RacnJsn95 Posted October 17, 2008 Report Share Posted October 17, 2008 Thinking about it, I dont see it being that hard to rig up something to run EDIS on a dual plug head. If you think about it, the EDIS8 coil setup is basically two EDIS4 coils. I bet it would be possible to wire up two edis 4 coils to the EDIS4 module to run all 8 plugs. If that didn't work, I would imagine you could probably run 2 EDIS4 Modules off of one toothed wheel, and sensor, and have an individual module for each coil and fire the 8 plugs. I think it would be easy to come up with somehing. Quote Link to comment
datzenmike Posted October 17, 2008 Report Share Posted October 17, 2008 Thought about it and now I don't think so. EDIS works on the 'wasted spark' method. One coil fires two plugs, one is the power stroke and the other is a cylinder on the exhaust stroke. If I were to use one coil to fire both plugs in the same cylinder it probably couldn't do it. It would be like firing a plug gap of .070 to .080 thou. The reason it works with the wasted spark is that it's much easier to fire a none compression cylinder. Oh well. I have an 8 plug crank angle sensor distributor for my Z24:D I'll go with that when I go to EFI. Quote Link to comment
Fineline Posted October 17, 2008 Report Share Posted October 17, 2008 Mike, I dont entirely think it wouldnt work. From what ive learned there is no provision in the coilpacks for the wasted spark to be a weaker spark as such. Each coilpack has 3 wires to it. 1 positive and a negative from the EDIS module to controll each side of the coil. The wasted spark is just that because there is no combustable mixture in the cylinder. If that is the case though you could still run two coil packs with a EDIS 4 module and use the negative trigger wire split to the two coils and run the weaker spark from the second coil to spark the other plug in the two plug head. The only thing to worry about would be the resistance of running the two coils versus one. You may run into issues here but who knows? Quote Link to comment
datzenmike Posted October 17, 2008 Report Share Posted October 17, 2008 So four coils I guess. Two for the two plugs on #1 and #4 cylinder and two for #3 and #2 cylinder. Could mount them on the valve cover. Quote Link to comment
Fineline Posted October 17, 2008 Report Share Posted October 17, 2008 (edited) So four coils I guess. Two for the two plugs on #1 and #4 cylinder and two for #3 and #2 cylinder. Could mount them on the valve cover. No it would just need two packs. One pack would fire the 1 primary and 4 secondary and another pack would fire the 4primary and 1 secondary at the same time. That way theoretically your only firing a primary discharge from one coil at a time but still firing both plugs in a given cylinder on its compression stroke with a primary discharge. The same would hold true with 2-3 firings. I will have to look when I get home but I think the EDIS system can fire both plugs from the same coil without issue. Edited October 17, 2008 by Fineline Quote Link to comment
pl521sss Posted October 17, 2008 Report Share Posted October 17, 2008 How do you test coil packs if their still good? Quote Link to comment
Fineline Posted October 17, 2008 Report Share Posted October 17, 2008 http://www.international-auto.com/index.cfm?fa=ad&aid=21 Quote Link to comment
pl521sss Posted October 17, 2008 Report Share Posted October 17, 2008 http://www.international-auto.com/index.cfm?fa=ad&aid=21 So, it's no different from a regular coil then. Quote Link to comment
Fineline Posted October 17, 2008 Report Share Posted October 17, 2008 (edited) Searched a little more and found this. http://www.autozone.com/az/cds/en_us/0900823d/80/13/ad/5e/0900823d8013ad5e/repairInfoPages.htm Edited October 17, 2008 by Fineline Quote Link to comment
bagged_datsun Posted October 21, 2008 Author Report Share Posted October 21, 2008 nothing major happening just waiting for the ITB's to come in and i had a little free time today and started doing some body work on the front, i got one of the fenders the front valance and the cowl stripped and ready for primer (the stuff in the rattle can works 10X better) here's a few pics of the truck and engine that are in it now Quote Link to comment
ariascarlos1990 Posted October 21, 2008 Report Share Posted October 21, 2008 Hook that EDIS up fool! p.s. that valve cover looks sick! Quote Link to comment
bagged_datsun Posted October 21, 2008 Author Report Share Posted October 21, 2008 Hook that EDIS up fool! p.s. that valve cover looks sick! im working on it lol Quote Link to comment
ariascarlos1990 Posted October 21, 2008 Report Share Posted October 21, 2008 im working on it lol lol. Jk Quote Link to comment
bagged_datsun Posted October 21, 2008 Author Report Share Posted October 21, 2008 lol. Jk did you ever go back to u pull it to look at that truck?...is an orange 76 Quote Link to comment
mklotz70 Posted October 21, 2008 Report Share Posted October 21, 2008 I was just there....it's still there and pretty straight. Quote Link to comment
ariascarlos1990 Posted October 21, 2008 Report Share Posted October 21, 2008 Nope not yet. I think were going thursday?.... Quote Link to comment
copacetickid Posted October 22, 2008 Report Share Posted October 22, 2008 I'm going to follow this thread with great interest :) I'm hoping to MS/EDIS/EFI-ify my L motor in the next year or so. My biggest problem with my little welding experience is fabbing a throttle body. How are you going to adapt the gsxr throttle bodies to the L block? I saw you cut the flanges... are you just going to weld up some tubing from the flanges to the TB? Simpler is better, and also repeatable (so you can sell adapters to everyone else :D). Quote Link to comment
slodat Posted October 22, 2008 Report Share Posted October 22, 2008 The way I was going to do it was similar to a side draft carb intake. Quote Link to comment
bagged_datsun Posted October 22, 2008 Author Report Share Posted October 22, 2008 I'm going to follow this thread with great interest :) I'm hoping to MS/EDIS/EFI-ify my L motor in the next year or so. My biggest problem with my little welding experience is fabbing a throttle body. How are you going to adapt the gsxr throttle bodies to the L block? I saw you cut the flanges... are you just going to weld up some tubing from the flanges to the TB? Simpler is better :D). that's exactly what im going to do lol just weld on about 2 or 3 inches of aluminum tubing and mout the gsxr's with some rubber hose for now, just till i get everything working well and then i will make a better intake and get ride of the cash intake manifold pieces becasue they tend to crack when you weld to them Quote Link to comment
bagged_datsun Posted October 28, 2008 Author Report Share Posted October 28, 2008 well my throttle bodies came in Friday :lol: but i wont have any real time to work on the truck till next Monday so hopefully next Monday i can get the manifold made and the fuel rail started, does anyone got any suggestions on the fuel system?....pump,filter,injector size,fuel pressure regulator? Quote Link to comment
bagged_datsun Posted October 29, 2008 Author Report Share Posted October 29, 2008 was bored at home so i had a little fum with some cardboard, i think this is the placement i want for the itb's Quote Link to comment
slodat Posted October 29, 2008 Report Share Posted October 29, 2008 Don't forget the engine tilt. Looks good! Quote Link to comment
bagged_datsun Posted October 29, 2008 Author Report Share Posted October 29, 2008 Don't forget the engine tilt. Looks good! yeah its like 20 degrease right?...i put them on there straight but it just didn't look right so i had to tilt them some :lol::lol: Quote Link to comment
datzenmike Posted October 29, 2008 Report Share Posted October 29, 2008 12 degrees Quote Link to comment
bagged_datsun Posted October 29, 2008 Author Report Share Posted October 29, 2008 12 degrees ahhh yes thanks mike Quote Link to comment
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