Spark plugs what do you guys like best?
06-19-2023 | 12:21 PM
#1
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From: Cortlandt Manor NY
Spark plugs what do you guys like best?
Looking to get the plugs for my fresh 509, it has slightly increased compression to 9.2:1 wondering what plug works best and what heat range would be best? I ran previously an NGK YR5 but I also saw the AC Delco Rapid Fire #1 plugs. Only plug I don't ever run is Champions I hate them.
06-19-2023 | 02:32 PM
#3
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From: Cortlandt Manor NY
Yes factory cast iron heads. What is the difference between the MR and CR plugs? Googling now lol
spark plugs
spark plugs
Last edited by Joeyboost; 06-19-2023 at 02:41 PM.
06-19-2023 | 02:39 PM
#4
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From: Cortlandt Manor NY
MR is marine, CR is commercial and the TS is extended tip from what I found. Which is my better choice?
spark plugs
spark plugs
06-19-2023 | 03:00 PM
#5
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From: Chicago, IL
The MR's are supposed to be stainless so they dont corrode.....if your in salt then do that...i always boated in fresh and changed the plugs yearly and used the standard CR's with out any issues....
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Money can't buy happiness, but it can buy horsepower. And I've never seen a sad person hauling a$$!
