I put on the Vortech last Aug/Sept and was wondering when will it be time to change out my one step colder plugs. Would think they would last more than a year.

 

I think Vortech says 1 year or 10,000 miles...

 

Jason, bring it over to the house and we will look at the plugs. My concern was that you never had a proper tune when SC was installed. Now Ryan has done his "thing". Not sure of the gap that was put on the plugs when SC was installed. Now a lot of dyno pulls ( 80+ ) plus the IM. You have been "lean", then "rich" and now thanks to Ryan the A/F looks good. Won't hurt to look.

 

About 10,000 miles sounds right for a properly tuned F/I car. Becuase these engines run richer than stock, and the high heat and cylinder pressures, the plugs arent going to last as long. I would check them every 5000miles, and change them when they look fouled.

FYI: We always carry these plugs in stock....for $65 shipped for the set.

 

Sharif, you need to start carrying the copper 1-step colder NGKs (about 1/2 the price of iridiums). Honestly, no difference between those and the Iridiums when I switched them back on my car. And since you're changing plugs roughly every 10K miles on an FI car, the longevity issue is not a factor

 

I agree with mcduck,every 5000 miles change them bad boys. My car ran better after they where replaced.

 

McDuck thanks for the feedback. Some people prefer the strength and heat resistance of the Iridiums. I am just using 10,000 miles as a guidline. When we are talking about a few bucks price difference between plugs, most of my customers prefer the highest quality plug, and will not mind paying slightly more for it. Playing with F/I, as you know, gets expensive, but plugs, IMHO are one of the smallest costs.