spark knock

gotboostsc

SCCoA Member
after redoin the supercharger and overdriving the blower with a 10 % pulley, I now have noticed a slight spark knock. The spark knock occurs when I step on it. My guess would be that I need for fuel or a bad injector or something. Just to check I pulled a spark plug out and the person who owne the car before me had put just regular spark plugs in, the right heat but not double platinum. I was just wondering where I stand and how to fix it. Thanks.
 
First I would change the plugs. I went with NGK Iridiums and have had great success. I also had some knocking when I changed to a 10% pulley. The stock injectors are good for about 300 HP and I am not at that level yet so I changed the fuel filter and all was fine. The filters should be changed fairly often and mine was blocked making it starve for fuel.
 
thanks

Hey I will definately try that, I replaced the fuel filter yesterday and will change the spark plugs soon. Thanks for the help.
 
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