Not sure if you've received any plug recommendations from other Club members yet. On my longram 300-F late this past June, I pulled the Champion RJ14YC plugs I had been running, which were under 3 years old, looked good, but had 20,000 miles on them, as the car was running pretty rough driving the 800-mile round trip up to St. Paul for Back to the Fifties. I also replaced my plug wires, with a replacement set from Lectric Limited, located near me in Bedford Park, IL. In connection with this, the plug boot on my #5 plug was fried. These are the same brand and heat range plugs I've been running the past several years, putting 40,000+ miles on the car.
On John Begian's recommendation, I switched over to NGK plugs - #XR5-3332. I've put another 5,000 or so miles on the motor since installing these new plugs and wires, and the car is running great. I did have a bit of an engine miss issue in Newport, but that was just misadjusted points, and had nothing to do with the plugs or plug wires. My gas mileage is about the same with the Champions vs. the NGKs - 11.8 mpg running at 75 mph roundtrip to Newport a few weeks ago, and about 12.5+ running at 60-65 mph.
I can't confirm whether these plugs are the ones for your shortram K.
On October 2, 2018 at 4:35 PM "'william ELDER' belder@xxxxxxxxx [Chrysler300]" <Chrysler300-noreply@xxxxxxxxxxxxxxx> wrote:
Could I please get your recommendations for which brand and part number spark plugs that you favor for your ram engines. I just pulled a set of EC3.52 plugs out of my K. They were very black and sooty, indicating too cold a plug or too rich a mixture.
Thanking You in Advance
Posted by: Noel Hastalis <cpaviper@xxxxxxxxxxx>
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