Whats a good Spark plug for the LT1 with 135k miles on it. car is a daily driver, and does see some racing once in while..
i used GM's Platium plugs with the 4 prongs, but i think they are fouled out now, and need to change them
i used GM's Platium plugs with the 4 prongs, but i think they are fouled out now, and need to change them
Registered User
Well the Delco plats. are a very good plug for daily driving. I have just switched over to NGK TR-55s however and am happy with those as well.
Registered User
Another vote for the NGK TR-55s.
No problems so far.
No problems so far.
Registered User
Rule of thumb = 1 step colder for every 75hp increase.
Try a step colder and see how they look after a week or so of driving. If they carbon up then you need to go hotter. The correct heat range will self clean.
-Mindgame
Try a step colder and see how they look after a week or so of driving. If they carbon up then you need to go hotter. The correct heat range will self clean.
-Mindgame
Registered User
Quote:
Try a step colder and see how they look after a week or so of driving. If they carbon up then you need to go hotter. The correct heat range will self clean.
-Mindgame
every 75hp increase? You talking about added nitrous hp?? For example for 150hp nitrous 2 step colder??Originally Posted by Mindgame
Rule of thumb = 1 step colder for every 75hp increase.Try a step colder and see how they look after a week or so of driving. If they carbon up then you need to go hotter. The correct heat range will self clean.
-Mindgame