Tested all major spark plug wires. My results...

[pajeff02]

I run the MSD wires on our car and added DEI heat sleeves for added protection.

[j nix]

Does anyone have an MSD Ignition on The WS.6? Do they work with non distributor applications?

[tatertot91]

Does anyone have an MSD Ignition on The WS.6? Do they work with non distributor applications?

MSD has a coil pack setup for the LS1, but not really worth it imo. The stock coils are plenty.

[j nix]

Thanks. I got that opinion from the guy at my local supply store. I was considering replacing the coil packs with MSD coil packs, but he said he wouldn't.

[tatertot91]

Thanks. I got that opinion from the guy at my local supply store. I was considering replacing the coil packs with MSD coil packs, but he said he wouldn't.

too much money for not enough gain
look into truck coils, heard good things about that

[ghostintheshell]

The granitelli wires give you an extra 10 rwhp over stock. I was going to get them but after I seen it i had already ordered my msd wires

I'd like to see multiple 3rd party dyno tests on this...

[THWOMP]

Very nice thread, very helpfull info, would like to see some dyno test done with this maybe see some physical results.

[2002ssslp]

Just buy the MSD's. Great product, great price, great reputation and great company support. # 32819 will do it for most LS motors and you can find them for about 65 dollars.

[Nowhereman]

Just purchased a set of MSD 8.5s.
The current wires are stock and 11 years old.
A set of Denso Iridiums are going along with it as 5 years ago I changed to the Denso units and have had zero issues.
It's just time to change plugs I figure.

[Fiew]

Higher the ohms the worse it gets.

Lower number good, higher number bad...

So your telling me the stock wires are better than the MSD Marosso and so on?? Lol

[Naaman]

Not at all.

Only two of the aftermarket wires showed higher resistance than stock. And for that matter, the stock wires were less than 1/2 the length of the after market ones, so they had an advantage to start with, yet were still holding back more voltage than most of the other wires.

My hopes are to get this as a sticky. It took some time to get ahold of all these wires. Pics will be up soon. Please give me props for doing this...

After reading 100 threads about spark plug wires and who has the best one, I've decided to do my own test on aftermarket wires. I've got ahold of 8 aftermarket wires, all 12.5 inches long (LS1 plugs are smaller).

So why do people upgrade their wires? The theory goes that because race wires have less ohm resistance, they will reduce the amount of electricity lost in the process of being transferred through the wire. The average car transfers 30,000 volts through the spark plug wire, so every little resistance counts.

OEM plugs were created with a significant amount of ohm resistance to supress RFI interference. Aftermarket wires supress this interference while claiming to supply lower ohm resistance than stock.

There are many people who disbelieve that aftermarket spark plug wires will gain you anything. After swapping out my wires, I noticed a HP gain and smoother acceleration. My guess is that a stronger spark (not hotter) allows for a faster combustion. I cannot find anything to disproove this, so for now this theory will stay in this write-up.

So here's my test. All wires were tested at least 3 times to be sure I have accurate numbers here. Remember, they were all 12.5 inches long. I tested next to a radio but did not pick up any static from any of these wires.

stock LS1 6 in. - 351 ohms

Granatelli 8mm Steel Solid Core Cable - 0.1 ohms
MSD 8.5mm Super Conductor - 71.6 ohms
Accel 8.8 300+ Ferro-Spiral Race Wire - 166.1 ohms
Jacobs Electronics EnergyCore 8.5mm - 178.3 oms
Taylor Spiro Pro 8mm Silicone - 301 ohms
Mallory Pro Sidewinder 8mm Silicone Suppression Wire - 313 ohms
Moroso Blue Maz Spiral Core 8mm - 661 ohms
Magnecor KV85 Competiton 2.5mm - 2053 ohms

I'll write some more, but I'm tired of playing with spark plug wires. So for now here's just the facts.