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mv6845
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Jul 20, 9:55am - #227892 
Spark plugs

When do you replace your spark plugs? 30k, 60k.

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ppeddy
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Jul 20, 10:38am - #227893 

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l2pdrums
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Jul 20, 12:11pm - #227894 
I concur.


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QTRMLR_1
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Jul 20, 5:42pm - #227895 
when do "I"? Clean them every 3000 or before every race if I'm racing during that season. Replace every 9000. But that's just me. grin


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Haulin_A_Doo
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Jul 20, 8:42pm - #227896 
Originally Posted by QTRMLR_1
when do "I"? Clean them every 3000 or before every race if I'm racing during that season. Replace every 9000. But that's just me. grin


They are Iridium aren't they? Those suckers are good for a minimim 60,000 miles. The only time you would fowl them is if you are chipped & running rich.

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QTRMLR_1
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Jul 21, 2:14am - #227897 
That was for what I would do with the stock ones. yeah I know, but I'm obsessive about Performance so I pull them often and make sure they are clean. Just in case anyone is curious about the Denso Iridiums, I felt about a 5 hp increase after popping them in (don't ask if I dynoed). The cost is $13.99 per plug.


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mach_y
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Jul 21, 6:59am - #227898 
Is it ok to run Bosch Plat 4 plugs?

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QTRMLR_1
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Jul 21, 7:34am - #227899 
sure, but Densos are better for N/A IMO.


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Jul 21, 7:35am - #227900 


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Jul 21, 8:56pm - #227901 
Originally Posted by mach_y
Is it ok to run Bosch Plat 4 plugs?


Check the left side of the cylinder head there is a warning label specifically requesting Iridium plugs only...at least there is on my motor...you can run the Bosch but there maybe a Performance issue/durability issue.


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QTRMLR_1
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Jul 22, 2:28am - #227902 
...since platinum is a colder plug than iridium I would say a Performance issue for N/A cars. But if that person insists on running low octane gas like 89, the colder platinum plugs could actually be a blessing, being less likely to cause detonation, which is always bad.


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Jul 22, 2:32am - #227903 
Originally Posted by GreyGhost2k2
Originally Posted by mach_y
Is it ok to run Bosch Plat 4 plugs?


Check the left side of the cylinder head there is a warning label specifically requesting Iridium plugs only...at least there is on my motor...you can run the Bosch but there maybe a Performance issue/durability issue.


And I should state to err on the side of caution, that if one puts nitrous or a Turbo on your car, it would be best to ignore this warning and go with colder plugs by several heat ranges to be less likely to provoke detonation.


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mach_y
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Jul 22, 7:18am - #227904 
I put the plat plugs in a stock 2000 GT, and there are no plans to do any engine mods to it. Should I pull these back out and put in iridiums?

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GreyGhost2k2
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Jul 22, 12:43pm - #227905 
Originally Posted by QTRMLR_1
Originally Posted by GreyGhost2k2
Originally Posted by mach_y
Is it ok to run Bosch Plat 4 plugs?


Check the left side of the cylinder head there is a warning label specifically requesting Iridium plugs only...at least there is on my motor...you can run the Bosch but there maybe a Performance issue/durability issue.


And I should state to err on the side of caution, that if one puts nitrous or a Turbo on your car, it would be best to ignore this warning and go with colder plugs by several heat ranges to be less likely to provoke detonation.


So we (GT owners) do not need Iriudium Plugs...I am kinda confused so try and bare with me...

If I run regular octane (cheapo stuff) then a Platinum Plug is fine (since it is "colder" meaning it can endure lower temperatures)
but if..
I run an Iridium plug ("hotter" meaning it can enure high temperatures) it is over kill for stock unless I have NO2 / a Turbo / or both, where engine temps are hotter and the higher temp would be a "normal" operation for these mods.

Is this what you are saying...or am I reversing something... (Platinum < Iriudium) for temp rating...I hope this makes sense...anyway I am out of the office in a bit but I'll be back around later tonight.

Oh one more thought, since the GT is a high reving engine for its power band then wouldnt' the Iridiums be better for longer life and less chance of detonation.

Sorry bout the length...I am doing some Calculus III while thinking here rofl


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Jul 22, 12:48pm - #227906 
Originally Posted by GreyGhost2k2
Originally Posted by QTRMLR_1
Originally Posted by GreyGhost2k2
Originally Posted by mach_y
Is it ok to run Bosch Plat 4 plugs?


Check the left side of the cylinder head there is a warning label specifically requesting Iridium plugs only...at least there is on my motor...you can run the Bosch but there maybe a Performance issue/durability issue.


And I should state to err on the side of caution, that if one puts nitrous or a Turbo on your car, it would be best to ignore this warning and go with colder plugs by several heat ranges to be less likely to provoke detonation.


So we (GT owners) do not need Iriudium Plugs...I am kinda confused so try and bare with me...

If I run regular octane (cheapo stuff) then a Platinum Plug is fine (since it is "colder" meaning it can endure lower temperatures)
but if..
I run an Iridium plug ("hotter" meaning it can enure high temperatures) it is over kill for stock unless I have NO2 / a Turbo / or both, where engine temps are hotter and the higher temp would be a "normal" operation for these mods.

Is this what you are saying...or am I reversing something... (Platinum < Iriudium) for temp rating...I hope this makes sense...anyway I am out of the office in a bit but I'll be back around later tonight.

Oh one more thought, since the GT is a high reving engine for its power band then wouldnt' the Iridiums be better for longer life and less chance of detonation.

Sorry bout the length...I am doing some Calculus III while thinking here rofl



calculus III ?!?!? what fun ! rofl


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Steven
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Jul 22, 3:11pm - #227907 

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QTRMLR_1
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Jul 22, 3:57pm - #227908 
^^sorry I don't have time to explain now...gotta run some errands and will back later tonight if you're up hehe.


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GreyGhost2k2
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Jul 22, 9:21pm - #227909 
Originally Posted by CaLiGTS
Originally Posted by GreyGhost2k2
Originally Posted by QTRMLR_1
Originally Posted by GreyGhost2k2
[quote=mach_y]Is it ok to run Bosch Plat 4 plugs?


Check the left side of the cylinder head there is a warning label specifically requesting Iridium plugs only...at least there is on my motor...you can run the Bosch but there maybe...


So we (GT owners) do not need Iriudium Plugs...I am kinda confused so try and bare with me...



calculus III ?!?!? what fun ! rofl


i meant cal II , but even still shitty...cal III is next semester frown


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Jul 22, 9:28pm - #227910 
Originally Posted by Steven



Thanks thumbsup

...aside from some terminology mix ups I basically got it. I am sticking with the Denso Iridiums


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Jul 23, 3:46am - #227911 
Originally Posted by GreyGhost2k2
Originally Posted by Steven



Thanks thumbsup

...aside from some terminology mix ups I basically got it. I am sticking with the Denso Iridiums


yeah I checked out that site (with a good name for business!) and like the price on the Denso Iridiums: $11.99 but that's probably without shipping right? Autozone charged me $13.99/plug but I just had to pay tax.


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Jul 23, 3:57am - #227912 
Originally Posted by mach_y
I put the plat plugs in a stock 2000 GT, and there are no plans to do any engine mods to it. Should I pull these back out and put in iridiums?


You should get better Performance with the iridiums, especially denso iridiums, over the platinum. Does anyone know the specs on the stock iridiums, like diameter of center electrode, etc? I pulled those out a long time ago when I didn't know any better and went with platinum. It would be funny if the stock iridiums were actually made by denso, but I'm not sure if Toyota would go that lavish stock.


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GreyGhost2k2
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Jul 23, 12:20pm - #227913 
Originally Posted by QTRMLR_1
Originally Posted by mach_y
I put the plat plugs in a stock 2000 GT, and there are no plans to do any engine mods to it. Should I pull these back out and put in iridiums?


You should get better Performance with the iridiums, especially denso iridiums, over the platinum. Does anyone know the specs on the stock iridiums, like diameter of center electrode, etc? I pulled those out a long time ago when I didn't know any better and went with platinum. It would be funny if the stock iridiums were actually made by denso, but I'm not sure if Toyota would go that lavish stock.


Denso Iridium plug 3324 SK16R11 0.044 $9.35 <---These came stock in my car...I wish I had seen sparkplugs.com earlier this site has a decent prices...my local A/Z didn't even have this plug listed in thier computer.


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Jul 23, 1:24pm - #227914 
What's interesting is those numbers don't match the part numbers on sparkplugs.com for the premium class (and more expensive) denso iridiums. Perhaps they changed in 4 years and improved them? Or just simply changed the numbering?


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Jul 23, 1:28pm - #227915 
There are two grades of denso iridium available on sparkplugs.com: super and premium with premium being better. I'd guess Toyota put the super or something close to that at the time in the stock car.


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