No More IGNITORS
05-09-04, 09:04 AM
#26
Originally posted by Pele
These distributor modifications seem interesting. Can you show pictures of the insides.
If the oppourtunity presents itself, show it dismantled, including how you added the 2nd set of magnetic pickups.
These distributor modifications seem interesting. Can you show pictures of the insides.
If the oppourtunity presents itself, show it dismantled, including how you added the 2nd set of magnetic pickups.
https://www.rx7club.com/photo/showga...hp?ppuser=28650
I'm unlikely to take it apart, but there's nothing below the top plate that's unique, anyway. In other words, you can see everything I changed from the top, without disassembly. Once all the pics are approved and appear in the gallery, if you take a look at your stock dissy, it'll probably be clear how to modify it. You'll need an add'l pair of magnetic pickups to do this, plus add'l ignitor(s) if you plan to run Alts. 3 or 4 from my previous post.
05-09-04, 02:19 PM
#27
All 13Bs from '86+ had simultaneous firing of both leading plugs. I actually thought the 20B did too, so I took it upon myself to figure out how to accomplish it. Then after I had completed my prototype, I found out the 20B only had single leading sparks per rotor face. Heh, that makes mine unique.
Here are two pictures from the top. Sorry about the quality.
Here are two pictures from the top. Sorry about the quality.
05-09-04, 05:25 PM
#28
Old [Sch|F]ool
Originally posted by Jeff20B
you can't spark both trailing plugs at the same time and expect the engine to live very long. My engine bucked and snorted at anything above idle. I think peejay tried it once too.
you can't spark both trailing plugs at the same time and expect the engine to live very long. My engine bucked and snorted at anything above idle. I think peejay tried it once too.
Man you never heard so much detonation. Apparently N/As *can* detonate if you set trailing to fire at 196BTDC.
Being too lazy to remove the A/C bracket so I could pull the distributor, I just switched the leads at the distributor cap. Then had to remember that T1 went to rotor 2 and vice-versa.
05-09-04, 09:37 PM
#29
The time mine did that I had accidentally swapped T1 and T2 on the cap while hooking everything up after a DLIDFIS install. So in reality, I never actually tried to fire both trailing plugs at the same time, but it accomplished the same thing in the end.
I even drove it around the block like that and I think anything above 1500-2k would cause the detonation. It must have had something to do with the amount of advance in the dizzy vs how far along the rotor with unburned AF mixture was in its cycle.
I even drove it around the block like that and I think anything above 1500-2k would cause the detonation. It must have had something to do with the amount of advance in the dizzy vs how far along the rotor with unburned AF mixture was in its cycle.
05-09-04, 09:42 PM
#30
Old [Sch|F]ool
Yep. More than maybe 1/3rd throttle or anything over 3000rpm and POW POW PEEYU POW... must have detonated 50-80 or more times before I figured out the problem.
05-10-04, 08:21 PM
#33
Old [Sch|F]ool
Especially when you can't get anywhere near full load before it happens.
Figure that at the throttle settings I was probably still under 5-6 inches of manifold vacuum when it'd start detonating. Nowhere near full load.
Figure that at the throttle settings I was probably still under 5-6 inches of manifold vacuum when it'd start detonating. Nowhere near full load.
05-11-04, 09:47 PM
#36
Just ordered my DIS-4 HO (The HO stands for highly overpriced There's a basic DIS-4 and then there's the HO version. The HO supposedly sends a few more electrons across the spark gap, which is better for igniting high boost mixtures. It sells for about $415, so I think that's about a dollar per electron. These things are on backorder, so I won't see it for another month. I'll post installation pics when I get my stuff.
There's a basic DIS-4 and then there's the HO version. The HO supposedly sends a few more electrons across the spark gap, which is better for igniting high boost mixtures. It sells for about $415, so I think that's about a dollar per electron. These things are on backorder, so I won't see it for another month. I'll post installation pics when I get my stuff.
05-24-04, 10:24 PM
#37
To keep you up to date, the pictures in my gallery were approved, so there are more shots of my Direct Fire Dissy (DFD). I also uploaded a wiring diagram.
I've finished the mounting brackets for the coils (they'll mount on top of the engine). Next are brackets for the ignitors and the MSD DIS-4 box. More pics as I progress.
https://www.rx7club.com/photo/showga...p?ppuser=28650
I've finished the mounting brackets for the coils (they'll mount on top of the engine). Next are brackets for the ignitors and the MSD DIS-4 box. More pics as I progress.
https://www.rx7club.com/photo/showga...p?ppuser=28650
05-25-04, 09:10 PM
#39
Originally posted by Jeff20B
Will you keep the two tip reluctor on leading? Or swap it with a four tip for simultaneous firing of both leading plugs? Or is that even possible with the way the pickups are stacked? Is trailing on one stack, and leading on the other?
Will you keep the two tip reluctor on leading? Or swap it with a four tip for simultaneous firing of both leading plugs? Or is that even possible with the way the pickups are stacked? Is trailing on one stack, and leading on the other?
And yes, you are correct -- one stack of mag pickups is for leading, while the other is for trailing. I don't plan to run wasted spark at this time. I set up the stacks this way so I can vary the phase between leading and trailing timing on both rotors simultaneously -- I just need to loosen a screw and rotate the trailing pickup stack.
05-26-04, 12:39 AM
#40
Ah, I see. Well, I'm certainly a believer in wasted spark or simultaneous firing or simulspark or 0&180º sparks or whatever you want to call it. So much so that I've gotten it to work on my 20B and plan on making it work on a single rotor engine.
It's kinda funny how calling it '0&180º sparks' is probably the only description that is not two-rotor-dependant. It works from one rotor on up. Heh, nice tangent eh?
It's kinda funny how calling it '0&180º sparks' is probably the only description that is not two-rotor-dependant. It works from one rotor on up. Heh, nice tangent eh?
05-26-04, 07:36 AM
#43
Rotary Freak
Originally posted by wed3k
random question, how much do ignitors sell for anyways?
random question, how much do ignitors sell for anyways?
05-26-04, 08:01 AM
#44
Right near Malloy
iTrader: (28)
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Originally posted by elwood
To keep you up to date, the pictures in my gallery were approved, so there are more shots of my Direct Fire Dissy (DFD). I also uploaded a wiring diagram.
I've finished the mounting brackets for the coils (they'll mount on top of the engine). Next are brackets for the ignitors and the MSD DIS-4 box. More pics as I progress.
https://www.rx7club.com/photo/showga...p?ppuser=28650
To keep you up to date, the pictures in my gallery were approved, so there are more shots of my Direct Fire Dissy (DFD). I also uploaded a wiring diagram.
I've finished the mounting brackets for the coils (they'll mount on top of the engine). Next are brackets for the ignitors and the MSD DIS-4 box. More pics as I progress.
https://www.rx7club.com/photo/showga...p?ppuser=28650
05-26-04, 02:51 PM
#46
Burning Oil-Grinding 3rd
elwood
I really like what you have done. I want to do the same and run a COP setup on my car. This was a great way to do it and still Keep the timing easy to set.
I really like what you have done. I want to do the same and run a COP setup on my car. This was a great way to do it and still Keep the timing easy to set.
05-26-04, 09:50 PM
#47
Originally posted by V8kilr
Elwood I could eat off of your carpet its so clean, but I would be afraid of getting it dirty.
is that the replacement stuff of ebay ?
Elwood I could eat off of your carpet its so clean, but I would be afraid of getting it dirty.
is that the replacement stuff of ebay ?
When I installed the roll bar, I removed the storage bins, and I glued ozite directly to the floor in that area. Lastly, I cutout a piece of ozite for the rear hatch area and had my local auto interior place surge around the perimeter.
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