Welcome to Ultimate Subaru Message Board, my lurker friend!
|Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.
We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!
Serving the Subaru Community since May 18th, 1998!
EA81, 2 separate ignition systems
Posted 14 May 2004 - 12:28 PM
Posted 14 May 2004 - 01:11 PM
Posted 14 May 2004 - 03:38 PM
Posted 14 May 2004 - 03:46 PM
Two separate systems would be overkill, though, not to mention expensive. A stock system can only take so much. Double high energy systems would probably burn up the plug electrodes or wires.
I highly recommend the Accel SuperStock coil if you have electronic ignition, but some people have been reporting failures lately.
I've had them on both my cars for years and have not had a single problem.
There is an immediate increase in ease of starting, off-idle acceleration, top-end grunt, and mpgs.
You have to open up the spark-plug gap to take advantage of the hotter spark. I run .045.
Posted 14 May 2004 - 07:06 PM
My stock coils were in good shape and not misfiring.
I do see the benefits I describe, nor are there holes in my pistons.
If higher voltage coils don't work better, then why are all new cars using them?
Posted 15 May 2004 - 12:34 AM
Posted 15 May 2004 - 08:40 AM
Seriously, if you can provide two completely independent sparks, it surely will create more power. I doubt it would be cost-effective, though.
shadow, since I was the 1st one to mention spark plug gap, it's fairly obvious your statements were aimed at my comments, but Thanks, I appreciate your concern.
When I 1st put the Accel on FERTHER, I kept the stock gap of .035 and still noticed an improvement right away. The next time I put in new plugs I opened them up to .045 and enjoyed even more improvement.
As a matter of fact, I *did* think more gap would be better, so I tried .055 in my cast iron /6, but it actually made FURTHER lose power . I set the gap back to .045 and all is well.
For the record, based on my real-world experience, I believe that an Accel(or any other high output coil) installed on a new condition motor of the same vintage *will* show measurable improvement.
No *magic* involved.
Posted 15 May 2004 - 12:37 PM
Posted 15 May 2004 - 01:20 PM
Posted 15 May 2004 - 02:55 PM
You're not the only one who went to school, and implying that I did'nt is incredibly arrogant *and* an insult. One of the moderators should spank you.
Unless you have some real, hands-on experience in the matter you're just blowing hot air. You, sir, may stick it where the light doesn't shine and STFU.
I believe in what I can show to be true, and this lunch wasn't free. It cost me $30.
I stand by my statements because I can demonstrate them, but I won't waste my time on ludites anymore.
Posted 16 May 2004 - 12:21 AM
I know better, and I feel badly.
Please forgive me.
General Disorder, I apologize. Let's call a cease-fire.
The shadow is correct. We need to stick together and share our knowledge.
shadow, Thanks for the shot of sanity. I had a bad week, but that's no excuse, just a reason.
C150L, sorry for trampling on your post. Let's return to the subject.
Will you tell us how you intend to provide 2 discrete sparks per cylinder?
Posted 16 May 2004 - 01:16 AM
And certainly if adding the coil improves the quality of your idle, and the throttle response from a dead stop at idle, I could see where someone might consider that a performance boost. But I also know that a properly functioning stock system can do the same thing. The EA81 is an 8.7:1 compression N/A engine in stock form - it does not have the ability to pull in enough mixture to need a huge hot spark for ignition.
The spark is just what starts the controlled burn of the fuel-air mixture. The flame front travels downward from the point of ignition until it contacts the head of the piston, forcing it downward. It matters very little how big this spark is, or how far it jumps. Just so long as it's enough to light off the burn. The problems come when the spark is too weak to light the mixture at all - causing a misfire, and loss of power, rought running ect. It is VERY difficult to notice a misfire that occurs only 2% of the time, so if adding the accel coil reduces that to .1%, then a "magical" performance boost will be seen. However, this is not because the coil is "hotter" but simply because you have reduced the frequency of misfire's in the system. A properly functioning stock system should not have any misfires to speak of anyway, and thus a hot coil should not have any real effect.
As for multi-spark situations, I can see how multiple flame fronts traveling from different angles would cause some interesting interactions.... I would have to see some data to know more about how that interaction affects performance. I can conjecture that two flame fronts (if properly aligned in both time and space) could cause the burn to occur faster, and thus you could change the timing of the engine over the entire RPM range.... an interesting concept indeed.
Posted 16 May 2004 - 01:42 PM
I guess I'm going to go with the idea that higher energiy to the spark plugs will make an improvement. Doesn't higher voltage carry easier through a conductor than a lower voltage? If such would be the case, I would think there would be more on the end of the line to do the task at hand. When I put in the Mallory dual point disty and high energy Mallory coil in my Road Runner, if better handled the more fuel/air I was cramming into my 440 through the Six-Pac. Perhaps by just eliminating the "intermittant miss" as stated above. The stocjk ignition in that case was all in new condition, the the Mallory made a huge difference. No physics classes here either, so perhaps I'm wrong too.
Posted 16 May 2004 - 03:58 PM
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users