Hey all, I tried to do some searching on this topic seeing as how it is fairly popular but didnt find much. I was just wondering if going one step colder plugs with only and intake and race pipe will yield any benefit? I figure it can hurt can it? Also, on SU, there are two different Denso plugs one says MS3 and one is MS3 HR-8 (Heat rating) So which ones are the one step colder? Thanks, dont flame the newb!!
Spark Plugs and Ignition
- Thread starter PCspeed3
- Start date
AutoXRacer
Member
Don't get the NGKs... They do not come pre-gapped...and you can't gap Iridium plugs!!! You'll break off the tip or at least damage it. If not, then misalign the electrode and tip.
Get the Denso...they come pre-gapped to our specs. ITV22 are 1 step colder and the ITV24 are 2 step colder.
Going with colder plugs removes heat from the cylinder combustion...thus reducing chances for knock. The only reason to go with colder plugs is to reduce knock...or avoid it. Installing colder plugs will give you the benefits of retarding your timing, but without actually retarding your timing.
Does that make sense... If you are stock or mildly stock, go with the ITV22. If you are fully bolted running higher PSI, go with the ITV24.
I hope that helps.
Get the Denso...they come pre-gapped to our specs. ITV22 are 1 step colder and the ITV24 are 2 step colder.
Going with colder plugs removes heat from the cylinder combustion...thus reducing chances for knock. The only reason to go with colder plugs is to reduce knock...or avoid it. Installing colder plugs will give you the benefits of retarding your timing, but without actually retarding your timing.
Does that make sense... If you are stock or mildly stock, go with the ITV22. If you are fully bolted running higher PSI, go with the ITV24.
I hope that helps.
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AutoXRacer Thanks for all your information man, thats just what I was looking for. I was talking to some guy about this over Xbox Live. He said that is makes the combustion cooler witch allows the air to be more dense or somthing, I didnt completely understand so thats why I asked. Anyways, thanks again for that info, cheers.
oaklandopen
Member
These arrows are supposed to represent......?
oaklandopen
Member
heat escaping...more arrows= more heat escaping= colder plug
and i don't think it's so much that it cools the combustion chamber as it does prevents the plug itself from being the "hotspot" in the chamber.
since less of the porcelein is exposed in the combustion chamber on the cold plug the heat can escape the plug through the head easier/quicker.
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Now wait a second, if a colder plug simulates retarding timing, isn't that going to negatively affect performance? I mean, at high speeds I am getting a bit of knock and would def go with new plugs to reduce or eliminate that.
So my question, would performance go down when going to one step colder??
So my question, would performance go down when going to one step colder??
Dashhawk
Mainly I am knocking when I am at high speeds, rpms, or full boost and don't harshly yank off the throttle.....
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AutoXRacer
Member
It does not affect performance. Colder plugs simulate timing retard, but without physically doing so. Since the colder plug is extracting more heat, thus reducing the chances for knock, you have the benefits of timing retard, without retarding timing.
Timing is not being physically retarded... So, no, performance is only enhanced do to the cooler combustion and reduced/eliminated knock retard.
AutoXRacer
Member
Buy a DashHawk or some type of data log device.
Wow, that sounds fantastic and I am 99% sold on new plugs, but then I have to ask (because this time around I am being ANALLY discerning about what I throw on my car) if there are benefits without drawbacks, why wouldn't the come stock on our cars?
chief_wiggum
Member
- :
- 2008.5 Mazdaspeed3-2010 Mazda5 GT
any reason why u couldnt use the 2 step colder on a mild bolt on set up?
OJ Bartley
Member
I was wondering why the factory plugs wouldn't be colder too. I know there's always a compromise with the decisions made on factory cars, largely to keep costs down and efficiency up, while still making the best product they can... but I can't figure out how this applies to sparkplugs.
While we're at it, is there any drawback to an ignition amplifier, such as increased heat or draw on the ... alternator maybe?
While we're at it, is there any drawback to an ignition amplifier, such as increased heat or draw on the ... alternator maybe?
