Hey guys, did some searching on this topic but didn't find much information
Do you guys with high HP motors even bother to clean your plugs if they fowl? Will cleaning them always let them work again? I am talking about plugs with less than say 300 miles. Also what Method do use to clean them?

I recently fowled a set a plugs for the first time in a very long time. I think its because I recently increased the amount of premix to almost 2oz per gallon. My car runs more than 500RWHP.

Thanks for your comments.

 

In a pinch I've hit them with a wire brush, then sprayed them down with flamable carb cleaner to get crap out of the nooks and crannied before lighting them on fire to burn off excess cleaner.. I wouldn't do that more than once though, as I *think* that once you've fouled them once they're more prone to fouling again....

​​​​​​​I'd make sure your ignition system is working properly and able to handle what you're throwing at it... I used to foul plugs pretty regularly with a twin power/stock coils and 2oz/gal premix. ALWAYS have a spare set of plugs handy in case you foul the installed ones by "being nice"

 

It kind of depends on what plugs you're using. If they're higher quality...like the NGK R7420's/R6725's and they're the correct heat range for your application. You should be able to get around 6K out of them. But that's also assuming that your tune is spot on. Also...How you drive. If you drive in Vac all the time and don't boost much...again...depending on your cruise map.. that's usually where your Carbon build up starts. Also, check your Idle Air/fuel.. I've watched plugs get fouled out just by idling and trying to fire a fat mix at 800RPM all day. All things to take into Consideration. Have you got a Stand-alone?

 

I am like mannykiller and use the NGK R7420's/R6725's. I have multiple sets of them.
About twice a year I pull one set and install the other. Then using an compressed air plug cleaner with a walnut shell abrasive cleaner, I clean them until they look like new.
Then they are regapped. This depends on your boost and ignition system. A larger gap helps low rpms but a smaller is best for high rpms and higher boost.

Standard on these plugs is .028".

 

Bringing this back.
I used to have a shop next door from me do mine as spares, but he's gone now. Looking to get my own.

Are you talking about this for cleaning? Is the supplied abrasive, walnut shell or is this something you purchased/added separately?
https://www.harborfreight.com/pneuma...ner-32860.html

 

I use the exact one you linked to and just use the abrasive supplied with it. Works great I clean my plugs after each drag event I run. They come out looking like new just make sure you blow all the abrasive material from the plugs. I blow them out with air after I clean them and then spay the hell out of them with brake cleaner and then blow them out with air again, has worked for me.