spark plugs

OVALTECH1

Premium User
A lot use the 3910x but it’s a pretty cold plug. We use the -7 and -8 NGK plugs in our clone and clone cousins...
 
Thanks Oval...I hate to sound stupid, but, does that plug have a specific number that i can look up.. -7 and -8 doesnt tell me a whole lot. probably should have posted in beginners forum, cuz thats what i am...
 

OVALTECH1

Premium User
I’ll get them for you tomm. I believe it’s a 5671-7 and 8. I’ll get you the stock numbers
 
NGK R5671A-8 is the same plug they run in 410 sprint cars.
 

OVALTECH1

Premium User
Same plug I run in my race car as well. 14mm .750 reach with a short strap.
 

OVALTECH1

Premium User
Yes... just be careful of your heat range NGK goes opposite. The low number is the hottest the higher the number goes the cooler your heat range gets
 
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