Spark Plugs
CH3NO2 LEARN IT BURN IT
Joined: Jul 2010
Posts: 5,628
From: Land of Taxes
"What is a good, quality Spark Plug replacement for AC R44S ? Engine is stock - ‘70 W30 4-Speed." --------------> Anything NOT made of chineasium.
20 years ago I would have steered you to Autolites. BUT no longer made in the USA.
I did a little homework 2 years ago. In conclusion, I agree with 66 SC on the V-Power NGK XR5 3332.
20 years ago I would have steered you to Autolites. BUT no longer made in the USA.
I did a little homework 2 years ago. In conclusion, I agree with 66 SC on the V-Power NGK XR5 3332.
Registered User
Joined: Mar 2019
Posts: 1,139
From: Way freakin too close to the city
My '72 442 with 455 (Non W-30) had Champion RJ-12Y plugs in the 455 when I bought it off my brother. My brother was the second owner and I believe the Champions were in the motor from the first owner when he drag raced it back in the 1970's & early 80's. When I got the car I replaced the Champions with AC/Delco that were listed for the motor and, to me, it didn't seem to run as well. Eventually and few years ago, I found one of the original Champion RJ-12Y plugs and bought a new NOS set off Ebay and installed it the 455 and it seems to run noticeably better just like it did when I bought it from my brother. I bought another full set off Ebay as a back up set. The Champions did seem to make a difference to me.
My car has the original motor and had carb work and appears to have had a high performance cam at one time(holes drilled in the butterfly's to help it idle). I have never done a compression check but wouldn't be surprised if it didn't have internal work done to it back in the day. I looked up that plug and it's listed for w-30's I believe?
OLE442
My car has the original motor and had carb work and appears to have had a high performance cam at one time(holes drilled in the butterfly's to help it idle). I have never done a compression check but wouldn't be surprised if it didn't have internal work done to it back in the day. I looked up that plug and it's listed for w-30's I believe?
OLE442
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