Yesterday in the morning (or sh1t, maybe it was 2 days ago), I finally was able to get definitive, quantitative results from testing my two sets of spark plug wires with a multimeter. I have the stock-ish set that AutoZone sells & I have a pair of those FAT red 10.4mm Taylor Made racing wires, which run around $100.
You have to set the voltmeter to 20K Ohms & test resistance. Look for the Omega symbol. My particular voltmeter has 3-4 various ranges for testing resistance. The AutoZone ones would not produce a reading until the voltmeter was placed on 20K Ohms resistance. Test is simple, with all the wires out of the car, stick one probe where the wire goes onto the spark plug & the other probe onto where the wire goes onto the coil pack.
SO... the red ones are
MUCH better. Much less resistance. I'd say on average, the red ones have 1/3 less electrical resistance than the stock-ish AutoZone ones.
My cylinder #1 red one required a jumper wire to finally get a reading off it. I've struggled putting it back on the spark plug in the past & I've had to use a pliers a few times to straighten out the inside of it. Everything's fine, no misfires, nothing like that. Just hard to press it back on the spark plug sometimes with the cramped space from the dipstick & how the speed daddy headers come out in that specific area.
Specific Readings:
Red 10.4mm Performance Wires:
Cylinder #:
1: 0.65
3: 0.66
5: 1.73
2: 1.0-1.5
4: 0.99
6: 0.99
AutoZone Stock-ish Skinny Dark Gray Wires:
Cylinder #:
1: 1.30
3: 2.06
5: 2.40
2: 3.75
4: 3.75
6:
10.78
You can clearly see that the AutoZone one for cylinder #6 (the longest wire), is REALLY struggling. Good deal of resistance, I would imagine. Perhaps that wire is bad, or even if it were comparable to the readings from #2 & #4, it still pales in comparison to what the red ones are doing for those same cylinders.
Gas mileage for the last few months with the red ones is exactly 20.0, combined highway & city. I did recently install a new fuel filter & did a partial injector rebuild: new injector upper screens & DIY at-home injector cleaning using a carb cleaner bottle, an ink refill kit syringe, a 9v battery, etc. I followed that with an overnight soak in fuel injector cleaner. 20.0 mpgs is on a 3.6 MPS with 1.9 rockers, headers, & heavy exhaust mods. AND quite a lead-foot. I do not baby it by any stretch of the imagination. Every chance I get I get into some nice BOOST
