Plug gap?

[noholdsbarred]

This question may have been asked before, but I tried searching the different forums and came up with nothing. I found info on NT engines, but I have a turbo engine. I need to know the proper spark plug gap. I only ask this because the sticker under the hood is completely worn and I don't have a manual. Thanks.

[NateS]

What plugs are you using? For my ngk brp7es I have them gapped at .028 If you are running more than 20psi of boost I would gap them a little smaller.

[Killa]

NGK BPR6ES gap at .028.

[l_eclipse_l]

It varies slightly, but people usually end up gapping them between 0.028-.032

The best thing you can do it gap them, and try them out. If it misses or just dosn't feel right, pull them out and change the gap slightly until you find something that works good for you.

[Thor06]

I had mine set at .032 but now I will be setting them to .028.

Thanks crunchy.

[crunchymilk55]

.028

[kjewer1]

I would recomend everyone run 7s, there is really no need to stay so hot at 6. The 7s self clean fine, and are even stock in the EVOs (well, the iridium version). I'm currently running non-projected 8s in the EVO, and they are still good a week into it (no idle/cruise misfire or fouling). If they last I'm staying with them. I am REALLY starting to like the idea of non-projected plugs. For anyone that wants to try them out, just take the "P" out of the part number. For example, BR7ES.

For people that would like to experiment, or buy plugs from non DSM vendors like summit, it helps to know what the part numbers mean. For example, in BPR8ES, the B is 14mm, P is projected, R is resistor, 8 is the heat range, E is gasket type seat, and S is single/standard side electrode. This is off the top of my head, so don't hold me to it, but you get the idea. Basically what we fool with is the number, and the P or lack thereof. Summit carries every NGK plug imagineable, 1.99 a piece isn't too shabby either. You can get it down to under 2 bucks locally by buyng cases, but I love dealing with summit.

I'm running a 25 gap lately, but 28 served me well for many years. On a bigger setup like my old 2g, you may have to go as low as low 20s. Any lower than that most poeple start to have problems. Ultimately, you want the biggest gap that doesn't misfire. There are MANY factors involved in that however.

[Nayr747]

Once again, thanks Kevin for your great posts and the time it takes to write them. Always extremely informative.

[Killa]

So its ok to run 7ES even Im stock ??

[kjewer1]

Yes, in my humble opinion. If you ask me, it's cheap insurance. Turbo car owners should be changing plugs every one or two oil changes, the factory probably used 6s only because the average non-enthusiast doesn't change plugs until they don't work.

[l_eclipse_l]

Originally Posted by Nayr747

Once again, thanks Kevin for your great posts and the time it takes to write them. Always extremely informative.

Agreed, it is always a treat to learn something new from Kevin....and that happens almost every post it seems.

[kjewer1]

You guys are making me blush.