Best spark plugs for a '97 3.4L supercharged?

jrohland · 09-28-2009, 04:39 AM

I'm putting new spark plugs into my '97 T100 3.4L with a supercharger. What would you folks suggest? They are going to be Denso. I just need to know which type.

jrohland

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jrohland · 09-28-2009, 03:46 PM

I have decided on these:

Denso 5303 Iridium Spark Plug

jrohland

Elton · 09-28-2009, 04:14 PM

id stick with factory or ngk dual ground plugs

BamZipPow · 09-28-2009, 08:07 PM

NGK...
Part Number: BKR5EKB-11

Part Number: BKR5EKPB-11 (platinum)

BamZipPow · 09-28-2009, 08:18 PM

6 New NGK Laser Platinum Spark Plugs BKR5EKPB-11--Best price shipped on eBay...about $53 shipped with the 10% coupon.

YodaPala · 09-28-2009, 08:27 PM

factoreeeeeeeeeeeeeeeeeeee plugs

Elton · 09-28-2009, 09:19 PM

wow 53 dollars for those fancy plugs gee i paid less than $15 for factory ones dont you need to run a step or two colder plug for s/c ?

mastacox · 09-28-2009, 09:56 PM

Stock spark plugs are NOT the best plugs to use on a supercharged 3.4l.

For a supercharged engine, you're best off getting Denso Iridium IK-22's, which are 2-steps cooler than stock plugs. Cooler plugs will help prevent cylinder knock (especially if you don't have a piggyback control unit to retard your timing). They're pricey, but they're the best.

Also, make sure to gap them to .032", which has worked great for many people running IK-22's and a supercharger.

Elton · 09-28-2009, 10:04 PM

ahh see i knew you had to run different plugs

jrohland · 09-29-2009, 04:03 AM

Quote:

Originally Posted by mastacox

Stock spark plugs are NOT the best plugs to use on a supercharged 3.4l.

For a supercharged engine, you're best off getting Denso Iridium IK-22's, which are 2-steps cooler than stock plugs. Cooler plugs will help prevent cylinder knock (especially if you don't have a piggyback control unit to retard your timing). They're pricey, but they're the best.

Also, make sure to gap them to .032", which has worked great for many people running IK-22's and a supercharger.

This is exactly the information I needed. I am getting some knock even with the highest octane I can get.

Also, I recently got some random misfire codes. I plan to use some diaelectric grease on the plug wires but I thought if I am going to pull the wires and coils I should go ahead and replace the plugs. I HAVE replaced the plug wires.

jrohland

mastacox · 09-29-2009, 06:28 AM

Quote:

Originally Posted by jrohland

This is exactly the information I needed. I am getting some knock even with the highest octane I can get.

Also, I recently got some random misfire codes. I plan to use some diaelectric grease on the plug wires but I thought if I am going to pull the wires and coils I should go ahead and replace the plugs. I HAVE replaced the plug wires.

jrohland

It's very common to have ping on a supercharged 3.4l with no fuel or timing mods. If you're interested in reading more into it, read this Wiki article:

TRD 3.4l Supercharger Wiki

Basically if you want to get rid of your ping and get some more horsepower you should take a very serious look at the URD 7th injector kit. It will run you a little over $1300 when you include an AFR gauge, but will fix all of your problems and give you the overhead for another 50 horsepower or so.

mastacox · 09-29-2009, 06:31 AM

BTW, don't bother with the Denso Copper 5062's if you see them on the URD website. Yes, they are cheaper than the Iridiums and still 2-steps cooler, but they don't last as long or gap as well as the Iridiums. I've tried both and the Iridiums win hands down (even though they're twice as expensive).

The tri-prong Denso Copper 5062:

mastacox · 09-29-2009, 06:43 AM

Also, when you install the Iridiums, make sure you tighten the cap on top of the spark plug good and tight (don't be afraid to grab it with some sharp pliers). If the cap is loose (or loosens from the vibration of the engine) it will play hell with your ignition system and give you all sorts of misfires and loss of power under boost (ask me how I know).

jrohland · 09-29-2009, 05:19 PM

Thanks. I have ordered the Denso IK22 Iridium Spark Plugs. I spent some time reading about the 7th injector system on URD. Cool stuff but too many ducats for now.

jrohland

jrohland · 10-01-2009, 05:35 PM

I put the new plugs in today. Three of the six old plugs where finger tight. One was very loose. One was snug and one fought me all the way out. It is amazing what you find when your work on these things after others have worked on them.

When I fired it up it was smooth. Had never run that well before. I hope the misfire codes are gone now.

jrohland

BamZipPow · 10-02-2009, 02:32 AM

Hope you put some anti-seize on them spark plug threads...

Did you torque the plugs to spec? 13ftlbs...

jrohland · 10-02-2009, 04:38 AM

I did coat them with anti-seize. I did not know what the torque spec was (should have checked the FSM). I will go back and torque them this weekend.

I cleared the codes and took it out on the highway for a test drive. So far, no CEL. I expect the P0170 (system too lean) to pop up but I don't want any other codes.

I got approval from the home banker to get whatever is needed to solve the lean-out and ping problems. I have already ordered a Walbro 190 LPH pump kit. Next will be Supra injectors if I can get the right part number. I know URD has the Bosch 318cc injectors. My experience with Bosch products has not been that great. I would rather find Denso injectors. Oddly, I ran a calculation using this injector calc site. My numbers are: Injectors: 6, BSFC:0.65 (super/turbo charged), Duty cycle: 0.80 and Horsepower: 275. The calc says I should use 391cc injectors. I wonder why URD says 318cc is enough.

Anyway, after the new pump and injectors I will start looking at the piggyback modules out there so I can tune away the ping and lean problems.

Are we having fun yet? You bet!
jrohland

09-28-2009, 03:46 PM	#2 (permalink)
jrohland Registered User Join Date: Aug 2009 Location: Northern Virginia, USA Posts: 108	Getting these... I have decided on these: Denso 5303 Iridium Spark Plug jrohland

09-28-2009, 04:14 PM	#3 (permalink)
Elton Contributing Member Join Date: Jul 2005 Location: Siletz,Oregon Posts: 10,668	id stick with factory or ngk dual ground plugs __________________ My Truck 98 4runner SR5 3.4L 5spd 4x4 E-Locker Mods Mom 07 Tundra d-cab limited 5.7L 4x4 auto sister 92 pickup SR5 X-cab 3.0L 5spd 4x4 Papa 89 Pickup SR5 X-cab 4x4 3.0L 5spd/98 4runner SR5 4x4 auto 3.4L R.I.P 91 4runner SR5 4x4 3.0L 5spd Totaled 5/13/06 My Wreck

09-28-2009, 08:27 PM	#6 (permalink)
YodaPala Registered User Join Date: Feb 2007 Location: Gateway City Posts: 486	factoreeeeeeeeeeeeeeeeeeee plugs __________________ Jardine cat-back exhaust, Airaid cold air, Alpine 9815 receiver, two pair polk momo component (mm6) speakers, two polk 12" subs (dx12) Alpine dvd changer, Alpine xm radio module, lightning audio 1.0 farad capacitor rockford fosgate (two) 250@2 punch amps, (one) rockford fosgate 200@4 for the components, all monster cable wiring for ai-net stuff+power wiring. Dynamat all over the place, Yakima king cobra bike racks, Bridgestone REVO's 255/70/16 mated to 16x8 trd Ivan Stewart wheels

09-28-2009, 09:19 PM	#7 (permalink)
Elton Contributing Member Join Date: Jul 2005 Location: Siletz,Oregon Posts: 10,668	wow 53 dollars for those fancy plugs gee i paid less than $15 for factory ones dont you need to run a step or two colder plug for s/c ? __________________ My Truck 98 4runner SR5 3.4L 5spd 4x4 E-Locker Mods Mom 07 Tundra d-cab limited 5.7L 4x4 auto sister 92 pickup SR5 X-cab 3.0L 5spd 4x4 Papa 89 Pickup SR5 X-cab 4x4 3.0L 5spd/98 4runner SR5 4x4 auto 3.4L R.I.P 91 4runner SR5 4x4 3.0L 5spd Totaled 5/13/06 My Wreck

09-28-2009, 09:56 PM	#8 (permalink)
mastacox Contributing Member Join Date: Dec 2003 Location: Los Alamos, NM Posts: 2,652	Stock spark plugs are NOT the best plugs to use on a supercharged 3.4l. For a supercharged engine, you're best off getting Denso Iridium IK-22's, which are 2-steps cooler than stock plugs. Cooler plugs will help prevent cylinder knock (especially if you don't have a piggyback control unit to retard your timing). They're pricey, but they're the best. Also, make sure to gap them to .032", which has worked great for many people running IK-22's and a supercharger. __________________ Brian 1998 4Runner SR5 Last edited by mastacox; 09-28-2009 at 10:02 PM.

09-28-2009, 08:07 PM	#4 (permalink)
BamZipPow Registered User Join Date: Feb 2007 Posts: 129	NGK... Part Number: BKR5EKB-11 Part Number: BKR5EKPB-11 (platinum)

09-28-2009, 08:18 PM	#5 (permalink)
BamZipPow Registered User Join Date: Feb 2007 Posts: 129	6 New NGK Laser Platinum Spark Plugs BKR5EKPB-11--Best price shipped on eBay...about $53 shipped with the 10% coupon.

09-28-2009, 10:04 PM	#9 (permalink)
Elton Contributing Member Join Date: Jul 2005 Location: Siletz,Oregon Posts: 10,668	ahh see i knew you had to run different plugs __________________ My Truck 98 4runner SR5 3.4L 5spd 4x4 E-Locker Mods Mom 07 Tundra d-cab limited 5.7L 4x4 auto sister 92 pickup SR5 X-cab 3.0L 5spd 4x4 Papa 89 Pickup SR5 X-cab 4x4 3.0L 5spd/98 4runner SR5 4x4 auto 3.4L R.I.P 91 4runner SR5 4x4 3.0L 5spd Totaled 5/13/06 My Wreck

09-29-2009, 06:31 AM	#12 (permalink)
mastacox Contributing Member Join Date: Dec 2003 Location: Los Alamos, NM Posts: 2,652	BTW, don't bother with the Denso Copper 5062's if you see them on the URD website. Yes, they are cheaper than the Iridiums and still 2-steps cooler, but they don't last as long or gap as well as the Iridiums. I've tried both and the Iridiums win hands down (even though they're twice as expensive). The tri-prong Denso Copper 5062: __________________ Brian 1998 4Runner SR5 Last edited by mastacox; 09-29-2009 at 06:32 AM.

09-29-2009, 06:43 AM	#13 (permalink)
mastacox Contributing Member Join Date: Dec 2003 Location: Los Alamos, NM Posts: 2,652	Also, when you install the Iridiums, make sure you tighten the cap on top of the spark plug good and tight (don't be afraid to grab it with some sharp pliers). If the cap is loose (or loosens from the vibration of the engine) it will play hell with your ignition system and give you all sorts of misfires and loss of power under boost (ask me how I know). __________________ Brian 1998 4Runner SR5 Last edited by mastacox; 09-29-2009 at 06:47 AM.

09-29-2009, 05:19 PM	#14 (permalink)
jrohland Registered User Join Date: Aug 2009 Location: Northern Virginia, USA Posts: 108	Great info Thanks. I have ordered the Denso IK22 Iridium Spark Plugs. I spent some time reading about the 7th injector system on URD. Cool stuff but too many ducats for now. jrohland

10-01-2009, 05:35 PM	#15 (permalink)
jrohland Registered User Join Date: Aug 2009 Location: Northern Virginia, USA Posts: 108	Changed the plugs today I put the new plugs in today. Three of the six old plugs where finger tight. One was very loose. One was snug and one fought me all the way out. It is amazing what you find when your work on these things after others have worked on them. When I fired it up it was smooth. Had never run that well before. I hope the misfire codes are gone now. jrohland

10-02-2009, 02:32 AM	#16 (permalink)
BamZipPow Registered User Join Date: Feb 2007 Posts: 129	Hope you put some anti-seize on them spark plug threads... Did you torque the plugs to spec? 13ftlbs...

10-02-2009, 04:38 AM	#17 (permalink)
jrohland Registered User Join Date: Aug 2009 Location: Northern Virginia, USA Posts: 108	Yes and no I did coat them with anti-seize. I did not know what the torque spec was (should have checked the FSM). I will go back and torque them this weekend. I cleared the codes and took it out on the highway for a test drive. So far, no CEL. I expect the P0170 (system too lean) to pop up but I don't want any other codes. I got approval from the home banker to get whatever is needed to solve the lean-out and ping problems. I have already ordered a Walbro 190 LPH pump kit. Next will be Supra injectors if I can get the right part number. I know URD has the Bosch 318cc injectors. My experience with Bosch products has not been that great. I would rather find Denso injectors. Oddly, I ran a calculation using this injector calc site. My numbers are: Injectors: 6, BSFC:0.65 (super/turbo charged), Duty cycle: 0.80 and Horsepower: 275. The calc says I should use 391cc injectors. I wonder why URD says 318cc is enough. Anyway, after the new pump and injectors I will start looking at the piggyback modules out there so I can tune away the ping and lean problems. Are we having fun yet? You bet! jrohland

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