As title says: what are the best spark plugs for stock 7AFE?

ngk or denso.

doesn't matter if you got copper or iridium, you will not notice a difference.

go with E3's a bit pricey but worth it

I got Platinum NGK G-Power. Didn't notice a difference like Hanyo said lol. But they've worked perfect. Remember, gap for 7AFE plugs is 0.028". There's no such thing as "pre-gapped".

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iridium plugs are pre gapped, you dont put feeler gauges in there to check because you take a chance of damaging the tip.

.028 is really tight, are you sure thats what it is? thats a gap for a turbo car, not a stock 7A-FE

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100% positive. My repair manual said so and that's what a few online references said too. And you never use feeler gauges to gap Platinum or Iridium. You use the wire gappers, they don't damage the tip at all.

dang that tight for an NA car.

Yeah, that's what I thought as well. And the gap for 5S was 0.044", iirc? That seems like a really big difference.

Correction. The spark plug gap for a 7a is .032 inch

So if the plug gap is 0.032 inch will these work:
http://cgi.ebay.com/ebaymotors/ws/eBayISAP...RK%3AMEWAX%3AIT

(1.016mm = 0.04in, is that close enough?)

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Still gotta gap them

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Spark plugs are "pre-gapped". If you buy the right ones they will be gaped to the specs of your car, however they tend to change gap as they get bumped around in shipping. Therefore you have to gap them. If you look under the spark plug reference chart they list the gap for your spark plugs.

http://www.ngksparkplugs.com/part_finder/c...suv/results.asp

Additionally some denso spark plugs can not be gapped.
those are the oem spark plugs for some Toyota's, not the bs +4 bosch spark plugs.
here is another example if spark plugs that can not be gapped:








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iridium plugs need to be gap also. But 99% of the "shade tree mechanics" don't know how to gap them. Therefore many part stores market them as "pre-gaped" to save people from the head aches of damaged spark plugs.



people use ramped spark plug gap tools to open the gap on the spark plugs which is the wrong way to do it. Every time you gap each plug you end up cutting into gapper tool which changes the reading. The ramp gapper tool is a measuring device and not a tool used to open up the gap.





Its like using a ruler as a knife and then complaining that you no longer can trace straight lines. That is why the wire gaper tool is recommended because it reduces the human error factor.

The right way to gap spark plugs is to use pliers. specifially these:





With all this technical jargon out of the way, what would i recommend? Well first things first always check the gap of your spark plugs. Your goal is for all of them to be the same gap around .030 in. If you notice one is gapped smaller then the rest exchange them with your parts store. Do not worry too much about the gap, as this changes as they wear out. They will open up was they the electroid wears or close down as they collect carbon. If your super anal you can adjust them but 90% of the time you will not notice a difference. That is why those crazy bs bosch +4 spark plugs can work in any car.

So, if I understand you correctly, you are saying that if I buy set of four plugs I posted in the link, the gap difference of 0.008 in will not make a difference and they will work just fine?

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close enough for government work.

Those scissor things look very expensive.

You can get these for less than $2 and they do not hurt the core unlike the ramped gappers. I use a ramp gapper to measure and this one to actually do the gapping.

I'm using IX NGK iridium plugs. works well here. getting good milleage too.

i use plain old NGK BKR7ES plugs. i buy them in bulk and use them in every one of my cars.

This post has been edited by Smaay: May 9, 2011 - 10:59 AM