Spark Plug References

[AlphaJaguar5]

NGK BKR6ES *STOCK heat range* <-- STOCK Plug

NGK BKR6E "V-Power" *STOCK heat range*

NGK BKR6EGP Platinum Plug *STOCK heat range*

NGK PFR6T-10G "Laser" Platinum *STOCK heat range*

NGK BKR6EIX Iridium *STOCK heat range*

Autolite 3922 Copper Plug *One Range Colder*

NGK BKR7E Copper Plug *One Range Colder*

NGK BKR7EIX Iridium Plug *One Range Colder*
NGK BKR8EIX Iridium Plug *Two Ranges Colder*
NGK BKR9EIX Iridium Plug *Three Ranges Colder*

Denso Iridium IK24 *Two Ranges Colder*
Denso Iridium IK27 *Three Ranges Colder*

DIAMOND 10.0:1 PISTONS - Run NGKBKR7EIX

[MGM1979]

ok, so who's running what these days?

I've got 2 sets of the V-power plugs sitting in my tool box (1 stage colder and maybe 2 stages colder?), but with the 3" pully, I'm thinking that's overkill right now.

So, do I stick with the BKR7Es or try something else? :shrug:

[Doc]

stick with the BKR7E or Autolite 3922

[REDLINE]

what is the advantage of changing your plugs one step colder?

[JayCizzo]

Read my post on RLF for reference as I don't feel like typing it out again.

http://www.redlineforums.com/forums/647196-post71.html

I'm thinking of switching back to my stock plugs to see if it helps my idle issues. Here's a pic of the plugs. Do they look in alright condition to throw back in?

140

[MGM1979]

I can't tell anything from that pic, except there's 4 of them...get a REAL camera, huh?

[JayCizzo]

I can't tell anything from that pic, except there's 4 of them...get a REAL camera, huh?

Did you click the image to enlarge it? I took it with my Sony 7.2mp digital camera. How much detail do you need? Is this one any better?

141

[MGM1979]

you can do that...oh...errr - of COURSE I'm clicking on it...did you? It gets all blurry - color's look good, with exception of the far right which might be a little rich/hot.

Can't see much else - were the gaps blown out at all?

[JayCizzo]

you can do that...oh...errr - of COURSE I'm clicking on it...did you? It gets all blurry - color's look good, with exception of the far right which might be a little rich/hot.

Can't see much else - were the gaps blown out at all?

Maybe a tad if any. Stock gap was .040 and the next measurement up I have is .045 which wouldn't fit so. :shrug:

I monitored some things this morning on my way in to work. I'm getting absolutely no knock and my boost hit a high of 15.0. I'm not gonna put the BKR6E's in, I'll probably return them. Cat Ion was talking about an idle air control valve. I guess I should just take it to the dealership but I don't have much confidence in them. Plus I don't want them fucking with my tune.

Anyway, I need to do some research and find out what the deal is with these double platinum plugs. They are $11 a piece where as the BKR6E/7E's are under $3. It just doesn't seem right that I went from an $11 plug to a $3. :shrug:

Edit: I talked to an NGK tech today. He recommended trying the BKR7EIX Iridium plugs. :shrug:

Edit #2: The first performance shop I call to ask about the Iridium plugs say they don't carry them or use them. He said they run too hot. Jesus, why does this have to be such a big PITA! I just want my stupid idle problem fixed.

[bc3tech]

iridium shit is NOT a good idea for boosted apps.... i've got a slew of posts to this effect somewhere; let me go try and dig 'em up. they're expensive as hell as well, probably why he recommended them. you may just want to try and gap down to .035; you may be getting some spark blowout.

edit: here is some info
http://forums.freshalloy.com/showthread.php?t=81591

[MGM1979]

he's right...tha's why no one runs iridium...they DO run to hot under boost.

try gapping those at .035

[JayCizzo]

My above post was referring to the stock plugs which I haven't used in forever. My current plugs are BKR7E and I just regapped them a couple of weeks ago. I'm getting zero knock, which is good, but when I start my car initially, especially with the AC on, the idle fluctuates up and down and in stop and go traffic the car will stall sometimes. Starts right back up. After the car warms up my idle is fine it seems and no stalling.

[bc3tech]

My above post was referring to the stock plugs which I haven't used in forever. My current plugs are BKR7E and I just regapped them a couple of weeks ago. I'm getting zero knock, which is good, but when I start my car initially, especially with the AC on, the idle fluctuates up and down and in stop and go traffic the car will stall sometimes. Starts right back up. After the car warms up my idle is fine it seems and no stalling.
i believe what you're seeing is a side-effect of colder plugs during "idle enrichment." i'm pretty sure this could be fixed simply by adjusting your tune.

Pulsating idle when first warming up? - HP Tuners Bulletin Board (http://www.hptuners.com/forum/showthread.php?t=665)

[Doc]

Its the tune. A PITA too, took me months to get one guys car right. His driving style totally sucked but he didn't want to hear that.

[JayCizzo]

Its the tune. A PITA too, took me months to get one guys car right. His driving style totally sucked but he didn't want to hear that.

Thanks.

Matt, can you bring your HPT with you in August and maybe we can get this figured out? I know you have limited time here but maybe before the tourney on Saturday? Otherwise, I may just drop the cash to have it tuned professionally. :shrug:

[Doc]

where are you Jay..?

[JayCizzo]

where are you Jay..?

Tampa, Florida.

[Doc]

hhmm....I was gonna make a trip down there over the weekend of the 4th, but flights were over $600 (normally $200) so I decided to skip this years trip (my mom lives in Maderia Beach)

[MGM1979]

remote possibly...we might be going to Busch Gardens Saturday afternoon - if that falls through, there's a good chance I could take a look.

If you find a guy, it might be easier for me to just ship the cable for you to get it ironed out - save you THAT much money, at least.

[JayCizzo]

remote possibly...we might be going to Busch Gardens Saturday afternoon - if that falls through, there's a good chance I could take a look.

If you find a guy, it might be easier for me to just ship the cable for you to get it ironed out - save you THAT much money, at least.

So if you go to Busch Gardens would you still make the TOC?

[MGM1979]

So if you go to Busch Gardens would you still make the TOC?

oh yeah - we'd leave by like 4:30...how far is it from Johnny's house?

[JayCizzo]

oh yeah - we'd leave by like 4:30...how far is it from Johnny's house?

40 minutes or so.

[csementuh]

I run BKR8EIX plugs with my 2.8" pulley and don't have any problems except for an occasional P0300 Random Cylinder Misfire. Think it might be spark blowout?

[NGKTECH]

iridium shit is NOT a good idea for boosted apps.... i've got a slew of posts to this effect somewhere; let me go try and dig 'em up. they're expensive as hell as well, probably why he recommended them. you may just want to try and gap down to .035; you may be getting some spark blowout.

edit: here is some info
http://forums.freshalloy.com/showthread.php?t=81591


This is disinformation.

Iriidum plugs will actually work much better in a boosted application over a standard nickel-alloy plug. The iridium material is much harder and denser and has a much higher melting point as well as less electrical resistance than nickel.

Edit: This is why they fine wire precious metal plugs are used OEM on cars like the EVO, STI, Mazda 6 turbo, S2000, K series, Chrysler hemis, LSJ's, etc.

The smaller diameter .6mm electrode also reduces quenching effect and helps promote faster flame growth read better efficiency which results in increased power.

The plugs also require less voltage to fire than a standard 2.5mm center electrode nickel plug which lessens spark blow out and misfires. The material itself is also very resilient against corrosion and fouling which improves throttle and eases starting. The iridium IX series also has a taper cut nickel ground electrode which also helps further concentrate the spark and reduce quenching allowing for a larger area for the flame kernel to expand into. the tapered ground also reduces vibrational stress and lessens the chance of a ground electrode failure.

And they will still last about twice as long as a standard nickely plug

Theyre not terribly expensive at only $7-8 per plug

[Doc]

I run BKR8EIX plugs with my 2.8" pulley and don't have any problems except for an occasional P0300 Random Cylinder Misfire. Think it might be spark blowout?

those are too cold for what you are running.

[bc3tech]

...
Edit: This is why they fine wire precious metal plugs are used OEM on cars like the EVO, STI, Mazda 6 turbo, S2000, K series, Chrysler hemis, LSJ's, etc....iridium is OEM on the LSJ? :freak:

[thoraldshib]

So I should change From NGK Laser Iridiums to Auto Lite plugs for boosted applications?