I read thru our diy post where the fellow evom member gave us a pretty cool diagram to make the coil on plug setup. Didnt find anything about the gap. I just finished mine, out of a 03 honda civic and the idle has improved like stated. My questions are, do we keep the same gap .023"-.026, or do we change it?

Im not sure if this belongs in the advanced section, if it does, move it please MODS

 

You're going to have to test it out yourself. There's no "set standard" for spark plug gaps. Each engine is different and reacts different, with the thousands of different types of spark plugs.

I'm at .023 with NGK BR8ES on my setup in my sig. Before without a COP I was at .025 (IIRC) and NGK BR7ES

Find a wide open road, bring some tools, and start testing

 

General direction: the more powerful your spark/coils the larger the gap

So take ^^^ his advice and see how large you can go

 

Well for right now I cant step on it because of all the boltons and no tune. When I take it up to Map ill let them know about it so we'll play with it a little. Anyone out there went .030 or bigger on their cop?

 

intersting thread. so one can increase gap untill blowout occurs ?

and how does wide gap affect idle and cruising, same theory there, wider=better ?

 

What theyre saying is a wider gap is a stronger spark, thats why we switched to a COP, but you have to test it out by getting the proper tools and finding a stretch of road and steping on it, you adjust the gap after every test

 

So basicly adjust it until blowout/misfire occurs

 

I wanted to chime in here because I think there is some misinformation and/or I am interpreting the info incorrectly.

First the general rule of thumb is to increase the gap until you experience spark blowup.

The wider gap does not give a stronger spark but actually helps to better atomize the fuel which leads to better performance and better fuel economy.

More powerful coils or a better ignition system such as a COP will give you a more powerful spark which will allow you to increase the gap.

Factors that determine how large of a gap you can run are things such as your ignition setup and boost pressure. For example, I run my car on 93oct at ~25lbs and e85 at ~28lbs. On my stock ignition setup my gap was set at .026 but while turning up the boost for my e85 tune I was experiencing spark blowout and had to gap them down to .022 I now have a SpoolinUp COP and my gap is set at .025 with no blowout issues. I honestly havent experimented with a larger gap as of yet but I am pretty sure I could increase the gap even more.

 

I have a 9, so after i gap my plugs there wont be any adjusting,lol. I ran mine at .20 just to be safe on my COP. ill probably try .23 and see what happens after these plugs go bad.

 

When I installed my Spoolinup COP, I put my plugs in and gapped them at .023, then had it tuned. I haven't messed with it since the tune, but I'm sure I am in the same boat as you. I bet I still have some room to widen the gap.

If you're getting it tuned, they should be able to do a few pulls on the dyno to tweak with the plugs. Or, I'm sure they have more experience then me when it comes to ignition/tuning, they might just throw plugs in and gap them for you and call it a day.

Either way, I'd say the average gap people are using is between .022 and .027ish. Stay in between those two, and you'll be good

 

I dont understand what you are getting at by saying that you have an IX...is it because you can only use iridium plugs or something? If so, you do know that you can still gap them however you need to be very careful when doing so.

 

<p>Yes I stated that because I have to run iridiums. If I ran coppers and they were 5 bucks a piece sure I would be really careful and change gap for testing but when you have to special order densos and the nkgs are over 120.00 for four then you gap them and keep them there. I'm not going to continuously open and close gap. That's just my opinion on it.also I did say that I gapped them at .20 im saying that im not going to continue attempting to open gap after its set at a certain gap. So yes I do gap my plugs..i guess if you started with say .25 and tested then if you got blow out then you close the gap a bit that makes sense but I would never try and open the gap back up after I've gapped it down

 

What plugs are you using? $30 bucks a pop that is absolutely crazy

I have an VIII but have run both copper as well as iridium plugs. The coppers run about $3 a piece and the iridiums are about $10 each.

 

ngks are about 30 bucks a piece for one step colder iridiums.

 

Where in the hell are you getting your plugs? I have run NGK BR8EIX before, and they're only $10/pc same with the BPR's.