quote:

Originally posted by 1320racer:
Bottom line is ohms per foot means nothing on the time slip.

quote:

Originally posted by Bucky:

quote:

Originally posted by seabass:
So what does the Ohms effect on how the wire works? I have moroso now but also own a set of magnecor. L;arge difference in ohms per foot between the 2

I don't know that I can clearly answer your question. But I can give you some observations.
For years, the idea was to have the lowest resistance wire possible in order to allow the maximum amount of current/energy flow to the plug and deliver the strongest spark. This was particularly important before the high powered msd ignitions came onto the market. But we have held onto the low resistance belief, and there is some science to back it up.
However, when the bigger msd's hit the market, most applications had more than enough spark. As said, you could put virtually any decent quality, non leaking wire on and deliver all the power to the plug that is needed. Additional power beyond that simply makes no improvements.
Now comes complicators.
Power adders greatly increase the pressure in which the plug has to fire. This makes it much much harder to fire that plug consistently. So more energy is often needed. Nobody wants to run a mag with all the advantages of the electronic ignitions. Plus with all the electronics in our cars today, the mags can play hell with all that stuff.
The smart coils even from the factory can really pour the coals to spark energy if driven correctly. Most aftermarket ecu's allow you to adjust the dwell to push them harder during boost. But now with all the energy being pushed to the plugs, noise can be a real issue. A friend made a neat test chamber to screw a plug into, that had a sight glass and a pressure port so it could be pressurized to simulate real world conditions. What a difference the pressure makes! And the amount of noise is crazy. It would fritz his cell phone during recordings.
It can play hell with a lot of things electronic, and believe it or not, boot seal becomes very important. The spark can find the path of least resistance which can be straight to the nearest ground to the boot.
I played around with, and had some good success with resistor plugs. I'm not sure why as it's a little counter intuitive. But it cleared up any misfire issues I was encountering. I will say some EFI systems are much more sensitive to EMI than others.
Just my experience and I don't claim to be any kind of expert on the matter.

quote:

Originally posted by Allen Chamberlin:
It all has to do with electronic noise. In most efi instructions it tells you to run a resistor plug. Most plug applications dont allow that so i run magnecor wires with holley efi. Certain ecus care some dont. I saw nothing power wise between all those wires but it did take care of a miss and locked up datalogs

quote:

Originally posted by seabass:

quote:

Originally posted by Allen Chamberlin:
It all has to do with electronic noise. In most efi instructions it tells you to run a resistor plug. Most plug applications dont allow that so i run magnecor wires with holley efi. Certain ecus care some dont. I saw nothing power wise between all those wires but it did take care of a miss and locked up datalogs

Ive read that other places as well. These moroso are 40 ohms a foot and the magnecor are approximately 1800 a foot