Ok, i've owned this car for like 15 years now, and I can't believe I'm making this post. But, I'm trying to troubleshoot an issue with the car. It smells like its running very rich, but everything seems to check out. So I decided to pull the plugs, and they look ugly enough that I want to change them out incase I am getting an incomplete burn of the fuel or something. Hence my question - spark plug gap? I'm getting conflicting information, or at least I think I am. So first, here are the plugs. These plugs have right around 20K miles on them. All have a smell of fuel to them, and it appears I need to replace the gaskets at the spark plug tubes:








I'm running the factory plugs, which I believe are either laser iridiums or laser platinums. Here is where I'm getting conflicting info. My current plugs are gapped at what appear to be 0.051 or maybe 0.052, so they may be out of speak which could create an incomplete burn. So I ordered a new set of Ngk replacement ifr6e11 spark plug, part number 6741, which according to NGK's website is the replacement for the factory ones that are discontinued. They say they come gapped at 0.044 and not to regap them.

Under the hood, it says to gap plugs at 1.3mm, which i believe is in the neighborhood of 0.51"?


Then in the factory service manual, it doesnt have a gap listed for the GSR, only the b18b motor. And it says the service limit is 0.51".
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Just so I can rule out an incorrectly gapped spark plug, what the heck do I install these at? Do I leave them at the pre-gapped 0.044"? Or do I gap them at 0.051" and then as soon as they exceed that gap, they are out of spec and need to be replaced? I know these are stupid, almost noobish questions, but I'm seeing some conflicting information.

 

Now I am curious what my manual says when I get home. I've been running ITR spark plugs and gaps on my motor due to the higher compression it has and similar pistons...

I saw these link and it shows the B18b1 at .44 like the B18c5.
https://honda-tech.com/forums/acura-...-time-3249580/

I saw this link from T-I.
https://www.team-integra.net/threads...52-gap.135826/

 

I saw the very same link on TI lol. I didnt' think to check my actual owners manual, I'm going to check there to. Maybe this is all just splitting hairs with how minute the differences are, but there should be this many different things listed for the same thing lol

 

My owners manual says the same thing, +/- .050

 

Here is the 1998 Helms manual for Spark Plug gap which to create more confusion, but at least it shows a range of gap vs a set value lol


On page 23-98, it does get more specific and mention the B18c1 uses spark plugs being pfr6g-13 and pk20pr-l13, but for the b18c5, pfr6g-11 and pk20pr-l11. I guess the B18c5 uses a tighter gap?

 

From my experience if you’re not running any power adders, the spark gap isn’t as critical to stock motors as many internet geniuses say it is. Before I turned my power up I wanna say I was running anywhere from .02 to like .045 with no differences in my af ratio. I would stick to .04in if everything is stock and you’ll be fine. If you start adding boost or something you might wanna close the gap a bit

 

That's good to know. I ended up throwing the new plugs in and gapping them just under .050.

How's your car been treating you? I haven't seen it out in a while.

 

Yeah dude you’ll be perfectly fine with that. But honestly I just started tearing my teggy down a week or so ago haha after it hit its third deer and I was having blow by issues I drove it home from work one day, parked it in the yard, pulled the ecu out and didn’t look at it for about two years. I’ll throw something up soon on it, the chassis is basically bare metal all the moment