FI Guys - where to get one step colder plugs for FI GS4
06-07-05, 09:08 PM
#31
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Location: Nevada
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Originally Posted by DaveGS4
Yes, its iridium. Gill, I can't recall if you were doing a supercharger or turbo on your GS; if you are not, you would not want to use these plugs.
One heat range is not too cold.Most newer cars that run knock sensors can benefit from running colder plugs.
I personally used to run 2 steps colder in my 4.6 DOHC engines with good results.
We ran a dyno test with new stock heat range plugs and the switched to a 2 step colder plug and found 8 HP.
Where the power comes from is your knock sensors are retarding timing without you knowing it.
The highest octane gas I can get in vegas is 91 and in the heat of the summer I GUARENTEE it'll be running in to the knock sensors.
When I first got my Lexus I looked for a colder plug and came up short. I will ordering a set of these for sure.And you FI guys might want to see if you can find one thats 2 steps colder.
06-08-05, 03:46 AM
#33
Lexus Fanatic
Originally Posted by LMSguy
Not necessarily true Dave.
One heat range is not too cold.Most newer cars that run knock sensors can benefit from running colder plugs.
I personally used to run 2 steps colder in my 4.6 DOHC engines with good results.
We ran a dyno test with new stock heat range plugs and the switched to a 2 step colder plug and found 8 HP.
Where the power comes from is your knock sensors are retarding timing without you knowing it.
The highest octane gas I can get in vegas is 91 and in the heat of the summer I GUARENTEE it'll be running in to the knock sensors.
When I first got my Lexus I looked for a colder plug and came up short. I will ordering a set of these for sure.And you FI guys might want to see if you can find one thats 2 steps colder.
One heat range is not too cold.Most newer cars that run knock sensors can benefit from running colder plugs.
I personally used to run 2 steps colder in my 4.6 DOHC engines with good results.
We ran a dyno test with new stock heat range plugs and the switched to a 2 step colder plug and found 8 HP.
Where the power comes from is your knock sensors are retarding timing without you knowing it.
The highest octane gas I can get in vegas is 91 and in the heat of the summer I GUARENTEE it'll be running in to the knock sensors.
When I first got my Lexus I looked for a colder plug and came up short. I will ordering a set of these for sure.And you FI guys might want to see if you can find one thats 2 steps colder.
hey which sparkplug would run 2 steps colder ...when you find it let me know thanks
h
10-10-05, 07:30 AM
#34
Lexus Fanatic
Originally Posted by LMSguy
Not necessarily true Dave.
One heat range is not too cold.Most newer cars that run knock sensors can benefit from running colder plugs.
I personally used to run 2 steps colder in my 4.6 DOHC engines with good results.
We ran a dyno test with new stock heat range plugs and the switched to a 2 step colder plug and found 8 HP.
Where the power comes from is your knock sensors are retarding timing without you knowing it.
The highest octane gas I can get in vegas is 91 and in the heat of the summer I GUARENTEE it'll be running in to the knock sensors.
When I first got my Lexus I looked for a colder plug and came up short. I will ordering a set of these for sure.And you FI guys might want to see if you can find one thats 2 steps colder.
One heat range is not too cold.Most newer cars that run knock sensors can benefit from running colder plugs.
I personally used to run 2 steps colder in my 4.6 DOHC engines with good results.
We ran a dyno test with new stock heat range plugs and the switched to a 2 step colder plug and found 8 HP.
Where the power comes from is your knock sensors are retarding timing without you knowing it.
The highest octane gas I can get in vegas is 91 and in the heat of the summer I GUARENTEE it'll be running in to the knock sensors.
When I first got my Lexus I looked for a colder plug and came up short. I will ordering a set of these for sure.And you FI guys might want to see if you can find one thats 2 steps colder.
So its Ok if i keep these plugs in ? I have taken out my S/C and was planning and sending them to the new owner . I guess I will keep and send new ones to the owner
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