Glow plug??
#2
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Joined: Dec 2004
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From: peoria,
IL
#4
I went years without using anything but MC9s they are great. They are considered a cool plug so you can use a bit higher nitro if you want. McCoy 59 is hot and 8 is middle of the road. McCoy makes great plugs
#5

My Feedback: (158)
McCoy plugs are great,,In the right engine an OS cv-r is designed to take a short plug (McCoys are long). This will add compression to that little engne
Try an OS plug #8 or other medium to hot short plug from best results if you are running 20%, if you run 30% run a colder plug OS A-5 or similar short plug
Don't forget to retune the engine to the different plug
Try an OS plug #8 or other medium to hot short plug from best results if you are running 20%, if you run 30% run a colder plug OS A-5 or similar short plug
Don't forget to retune the engine to the different plug



