Whats wrong with this picture?

sikpupy · 08-10-2005, 11:19 AM

Okay, so, I tore a teeny hole in my spark plug boot (I think). Now, lets observe the first fact that the plug itself is gapped at .045 . Second fact, the gap between the plug boot and the head is about 3/4? of an inch. Third fact, spark takes the least path of resistance, so ........

My final conclusion, besides that "fact" that the plug boot is ripped, that Champion truck plugs carry way too much resistance???

sikpupy · 08-10-2005, 11:31 AM

Then again ...................... here is some good reading I just found, for all you tech heads that take a step beyond wondering if it is lefty loosy/righty tighty

http://www.corollaperformance.com/Te...parkplugs.html

Lloyd · 08-10-2005, 01:47 PM

Good link to understand plugs.

But,
what's your point? :bigpink: ???

Bobelmore · 08-10-2005, 02:36 PM

The article makes a couple good points:
increase the gap if you have a lite-foot and aren't concerned with WOT performance. This will increase mpg. This is me as the 4oh spends 95% of its' life around 2k rpms.

Copper conducts better than platinum, but wears much faster (12k vs 30-40k miles) - we all knew that. But this is why DC says to stick with copper - I recently spoke to a "leed" DC Jeep mechanic that many drivability issues can be resolved by sticking with copper plugs. imo Platimun is fine if using an aftermarket coil (for those of us w/o DIS).

rayjj · 08-10-2005, 02:49 PM

Quote:

Originally Posted by Bobelmore

The article makes a couple good points:
increase the gap if you have a lite-foot and aren't concerned with WOT performance. This will increase mpg. This is me as the 4oh spends 95% of its' life around 2k rpms.

Copper conducts better than platinum, but wears much faster (12k vs 30-40k miles) - we all knew that. But this is why DC says to stick with copper - I recently spoke to a "leed" DC Jeep mechanic that many drivability issues can be resolved by sticking with copper plugs. imo Platimun is fine if using an aftermarket coil (for those of us w/o DIS).

Can only speak from my own experience, but when I had platinum plugs it, the idle was not as smooth and my mpg was less than with copper plugs, and they also didn't last as long as the copper. This is with 2 different brands of platinum as well. Rule of thumb is to stick with whatever was stock in the vehicle.

Lloyd · 08-11-2005, 02:02 AM

Okay, I was overlooking the obvoius: always run stock plugs and wider gap is hotter spark. Kinda like pigs don't fly.

:neil:

08-10-2005, 11:19 AM	#1
sikpupy Registered Join Date: Jan 2004 Posts: 1,280 Thanks: 0 Thanked 0 Times in 0 Posts	Whats wrong with this picture? Okay, so, I tore a teeny hole in my spark plug boot (I think). Now, lets observe the first fact that the plug itself is gapped at .045 . Second fact, the gap between the plug boot and the head is about 3/4? of an inch. Third fact, spark takes the least path of resistance, so ........ My final conclusion, besides that "fact" that the plug boot is ripped, that Champion truck plugs carry way too much resistance??? __________________ 97 black Laredo – New 4.0 Stroker with a Borla Header, MSD SS Ignition Upgrade, CarSound Cat, 62 mm Fat Man Throttle Body, Mike Leach Tail Pipe, Trail HD headlight wiring w/relays, 2" Master BB lift, 4.56 gears, 30" tires.... 94 black Laredo - stock with the wonderful TSB diesel knock from hell after a full refresh. Hmmm, I guess it wasnt the rods knocking after all?? :josh:

08-10-2005, 11:31 AM	#2
sikpupy Registered Join Date: Jan 2004 Posts: 1,280 Thanks: 0 Thanked 0 Times in 0 Posts	Then again ...................... here is some good reading I just found, for all you tech heads that take a step beyond wondering if it is lefty loosy/righty tighty http://www.corollaperformance.com/Te...parkplugs.html __________________ 97 black Laredo – New 4.0 Stroker with a Borla Header, MSD SS Ignition Upgrade, CarSound Cat, 62 mm Fat Man Throttle Body, Mike Leach Tail Pipe, Trail HD headlight wiring w/relays, 2" Master BB lift, 4.56 gears, 30" tires.... 94 black Laredo - stock with the wonderful TSB diesel knock from hell after a full refresh. Hmmm, I guess it wasnt the rods knocking after all?? :josh:

08-10-2005, 01:47 PM	#3
Lloyd Montana Join Date: Jun 2005 Posts: 489 Thanks: 0 Thanked 0 Times in 0 Posts	Good link to understand plugs. But, what's your point? :bigpink: ??? __________________ 97 ZJ, 4.0, 42re, 242, 3.73, tow hooks, reciever hitch, skids, rockrailz, OBA, 3.5" lift, Rancho 9000s, JKS discos, Addco 1.25", 16" 265/75R/16 Dunlop MTs, 99+intake & Banks lookalike header, NEED: adjustable upper front control arms, front track bar frame bracket for JKS/RE bar, adjustable rear track bar, Addco rear sway bar, winch

08-11-2005, 02:02 AM	#6
Lloyd Montana Join Date: Jun 2005 Posts: 489 Thanks: 0 Thanked 0 Times in 0 Posts	Okay, I was overlooking the obvoius: always run stock plugs and wider gap is hotter spark. Kinda like pigs don't fly. :neil: __________________ 97 ZJ, 4.0, 42re, 242, 3.73, tow hooks, reciever hitch, skids, rockrailz, OBA, 3.5" lift, Rancho 9000s, JKS discos, Addco 1.25", 16" 265/75R/16 Dunlop MTs, 99+intake & Banks lookalike header, NEED: adjustable upper front control arms, front track bar frame bracket for JKS/RE bar, adjustable rear track bar, Addco rear sway bar, winch

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08-10-2005, 02:36 PM	#4
Bobelmore Registered Join Date: Nov 2002 Location: Raleigh, NC Posts: 1,376 Thanks: 2 Thanked 0 Times in 0 Posts	The article makes a couple good points: increase the gap if you have a lite-foot and aren't concerned with WOT performance. This will increase mpg. This is me as the 4oh spends 95% of its' life around 2k rpms. Copper conducts better than platinum, but wears much faster (12k vs 30-40k miles) - we all knew that. But this is why DC says to stick with copper - I recently spoke to a "leed" DC Jeep mechanic that many drivability issues can be resolved by sticking with copper plugs. imo Platimun is fine if using an aftermarket coil (for those of us w/o DIS).