Spark Plugs

MAXIMUS1968 · 09-28-2006, 02:13 PM

Can someone explain the need for a hotter or colder plug? What are the pros and the cons

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fork · 09-28-2006, 04:27 PM

hotter plugs for more efficient fuel burn, burn out carbon in cylinders (so i've been told. I'm still using NGKs)

rngrchad · 09-28-2006, 05:39 PM

I'm really familiar with plug ratings as I raced 2strokes for a long time.
I used to have the charts between Champion and NGK memorized. NGK numbers ascend for colder plugs and Champion descend.
That BP6ES is an NGK number and would be equivalent to, oh, probably an N-11Y Champion (strictly from foggy memory.)
Man, I hope I got that right :-)

My experience has been that NGKs are broader in heat range and more resistant to fouling than Champions. Not enough
experience with any other brand to comment. Other than Bosch Platinums which are junk.
I would think that with modern ignition systems, mass airflow sensors, knock detection sensors and the rest, I wouldn't be surprised
to learn that tweaking the plugs' heat range doesn't get you much of anything any more.

But to answer your question directly I guess I could simply state that if you drive your rig at lower rpm's say aroudn 2000 most of hte time, you can get away with running a hotter plug. If you run your rig around 5 and 6 grand you should run a "colder" plug.
Just a rant from my 2-stroke motocrosser mindset.

Also something else worth mentioning: I think, with unleaded gas, that the ability to "read" your plugs electrode to determine whether it is running to rich or too lean can not be accurately done. Those days ended when leaded gas went unleaded.

MAXIMUS1968 · 09-28-2006, 06:19 PM

If i am getting some detonation tho, wouldnt i want to try a colder plug?

AH64ID · 09-28-2006, 06:28 PM

Year, Model, Engine???

If you have a 22RE you have one choice, OE style NGK or Denso... they dont run properly on anything else.

MAXIMUS1968 · 09-28-2006, 06:47 PM

94 22re i have NGK's in it now, I was looking at possibly the denso iridium plugs that have a colder range

AH64ID · 09-28-2006, 07:16 PM

Quote:

Originally Posted by MAXIMUS1968

94 22re i have NGK's in it now, I was looking at possibly the denso iridium plugs that have a colder range

I would stick to a stock plug, the 22RE doesnt like other plugs. I put Boschs in mine and it wouldnt even run. If your getting detonation its from something else, fix that.. dont correct something else to fix the problem.

surf4runner · 09-29-2006, 02:53 PM

Quote:

Originally Posted by rngrchad

Also something else worth mentioning: I think, with unleaded gas, that the ability to "read" your plugs electrode to determine whether it is running to rich or too lean can not be accurately done. Those days ended when leaded gas went unleaded.

this olskool method still works on carburated engines, maybe not with EFI? i still use it when i want to tweek my carbs

rngrchad · 09-29-2006, 03:32 PM

Quote:

Originally Posted by surf4runner

this olskool method still works on carburated engines, maybe not with EFI? i still use it when i want to tweek my carbs

I know I could still read 2 stroke dirtbike motor plugs, while running unleaded. Just with all the computer control affecting modern engines I can't fully believe that you will get any accurate reading off a plug electrode at all. Just my thought.....not sure if I'm right nor not.

09-28-2006, 04:27 PM	#2 (permalink)
fork Registered User Personal Sales Rating: (0) Join Date: Sep 2006 Location: i ka moana Posts: 952	hotter plugs for more efficient fuel burn, burn out carbon in cylinders (so i've been told. I'm still using NGKs) Last edited by fork; 09-28-2006 at 04:34 PM.

09-28-2006, 05:39 PM	#3 (permalink)
rngrchad Registered User Personal Sales Rating: (0) Join Date: Apr 2004 Location: Currently reside in Ohio Posts: 858	I'm really familiar with plug ratings as I raced 2strokes for a long time. I used to have the charts between Champion and NGK memorized. NGK numbers ascend for colder plugs and Champion descend. That BP6ES is an NGK number and would be equivalent to, oh, probably an N-11Y Champion (strictly from foggy memory.) Man, I hope I got that right :-) My experience has been that NGKs are broader in heat range and more resistant to fouling than Champions. Not enough experience with any other brand to comment. Other than Bosch Platinums which are junk. I would think that with modern ignition systems, mass airflow sensors, knock detection sensors and the rest, I wouldn't be surprised to learn that tweaking the plugs' heat range doesn't get you much of anything any more. But to answer your question directly I guess I could simply state that if you drive your rig at lower rpm's say aroudn 2000 most of hte time, you can get away with running a hotter plug. If you run your rig around 5 and 6 grand you should run a "colder" plug. Just a rant from my 2-stroke motocrosser mindset. Also something else worth mentioning: I think, with unleaded gas, that the ability to "read" your plugs electrode to determine whether it is running to rich or too lean can not be accurately done. Those days ended when leaded gas went unleaded. __________________ 2008 Tacoma TRD Access Cab v-6. 97 regular cab tacoma 33x9.5bfg at, 4.10 gears, custom sliders, custom rear bumper, 4xinnovation tube doors, lockright. 1983 SA Axle Frameoff Restore. CB: Connex 3300hp Radio driving a FatBoy Amp doing around 1000watts on AM. Antenna: Monkey Made MM5 -=NO BAMA 08 =- Last edited by rngrchad; 09-28-2006 at 05:52 PM.

09-28-2006, 06:28 PM	#5 (permalink)
AH64ID Contributing Member Personal Sales Rating: (0) Join Date: Dec 2002 Location: Idaho Posts: 4,653	Year, Model, Engine??? If you have a 22RE you have one choice, OE style NGK or Denso... they dont run properly on anything else. __________________ -John '05 Dodge 3500 SRW 4x4 SLT 5.9 Cummins QC LB NV5600 2003 SR5 4Runner, V6 4WD. 1" cornfed lift Previous Toyota's '92 Red Truck NALA Speed doesn't kill, its the sudden stop that hurts.

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09-28-2006, 06:19 PM	#4 (permalink)
MAXIMUS1968 Registered User Personal Sales Rating: (0) [OP] Join Date: Mar 2006 Posts: 153	If i am getting some detonation tho, wouldnt i want to try a colder plug?

09-28-2006, 06:47 PM	#6 (permalink)
MAXIMUS1968 Registered User Personal Sales Rating: (0) [OP] Join Date: Mar 2006 Posts: 153	94 22re i have NGK's in it now, I was looking at possibly the denso iridium plugs that have a colder range

09-29-2006, 03:32 PM
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