Which spark plugs should I use?

[babiebluboi]

Which NGK spark plugs should I use for my stock turbo (will upgrade soon enough) GSX? I've seen 1-step, 2-step, 3-step colder spark plugs. I'd assume that the coldest for turbo would be the best, but I asked my Auto Tech teacher and he said not necessarily because it could be TOO cold and something about the combustion chamber. What do you guys suggest?

 

[DSM4me44]

Hey man,

If it were up to me I would say if you plan to continue modding, go with the NGK bpr7es. They produce a little bit colder spark then the stock 6's. However, you can go to cold like your teacher said. You have a few mods and you will probably be good running the 6's. If you wish to run a colder spark go with the 7's. Anything more would be overkill and only hurt you.

 

[GVR4592]

The spark isn't colder with a colder heat range plug, the heat range is an indicator of the spark plugs ability to transfer heat from the combustion chamber. If you are still at stock or near stock boost level, just stick with the stock heat range.

 

[babiebluboi]

Well, I don't really want to go with the stock BPR6ES, so I'll take it down 1-step colder with the BPR7ES. What about when I upgrade the turbo? Then, should I get 2-step or 3-step colder?

 

[GVR4592]

That depends on boost level, intercooler efficiency, tuning, etc. Most people stick with the 7's, but it doesn't hurt to try the 8's. You'll know right away if you chose a heat range that's too cold, the plugs will foul quickly and the engine will run like ass.

 

[daren_p]

Yeah I know I'm right, and I didn't even have to copy and paste from the NGK site to look like I know what I'm talking about.

Busted

Spark plug range isn't so much turbo based as to how much boost you plan on running. For the stock turbo running in the 15-16 psi range the stock 6 range is all that is needed & the 7's will just foul much quicker, giving you worse performance & having to change plugs much more often. If you running 18psi or more once you've upgraded the turbo, then sure go for the 7's but 8 are still over kill for this level. You probably shouldn't even think about running the 8's until your atleast in the 25+psi range.

 

[oldman]

Busted

Spark plug range isn't so much turbo based as to how much boost you plan on running. For the stock turbo running in the 15-16 psi range the stock 6 range is all that is needed & the 7's will just foul much quicker, giving you worse performance & having to change plugs much more often. If you running 18psi or more once you've upgraded the turbo, then sure go for the 7's but 8 are still over kill for this level. You probably shouldn't even think about running the 8's until your atleast in the 25+psi range.

So if I'm running 17psi, should I go with 6 1/2's?

 

[daren_p]

So if I'm running 17psi, should I go with 6 1/2's?

Exactly


(note: to newbie's that are trying to find 6 1/2's, they only carry these at selected speciality performance shops )

 

[freshlane]

ps. Make sure when you buy your plugs that they give you the BPR6ES and not the BPR6ES-11 which most auto stores try to sell dsmers (had that problem 2days ago) & gap them correctly

 

[DSMunknown]

Which spark plugs should I use?

Why, why, why?!

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[DSM4me44]

ps. Make sure when you buy your plugs that they give you the BPR6ES and not the BPR6ES-11 which most auto stores try to sell dsmers (had that problem 2days ago) & gap them correctly

Hey, hes right. When i get mine at Summit Racing, they do try to give you the -11s. Those are for the non turbos. Same plug, but they are gapped differently.

 

[Defiant]

Well, I don't really want to go with the stock BPR6ES,

Those aren't stock.

Wouldn't one of the dozens of other threads about this dead horse have covered it for you?