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Blah1219
09-17-2011, 09:59 AM
Easy question, Should I be using the K20A3 Spark plugs/ Injectors or the K20A2 Spark plugs/ Injectors?

Build consists of:

K20A3: Block, Rocker assembly, Cams
K20Z1: Pistons, Rods, Crank, Oil pump assembly
K24A1: Head, Valvetrain
Tnhatch03
09-17-2011, 10:04 AM
You should probably not use stock K20A3 plugs, but find colder spark plugs.

You will want larger injectors than the 270s the EPs have. Maybe the A2 310s will work...

I have 650s... haha
Nitrofaint
09-17-2011, 10:35 AM
What mods are you planning to put on? N/A or Turbo build?
Blah1219
09-17-2011, 11:01 AM
I have 310s and 270s. Yeah I thought about the a2 spar kplugs since Ill have higher comp. but since I wouldnt put out the same whp, I had no clue. I believe the 650s would be just a tad out of my league.

Straight N/A. After the build is done. Im going to do a before/ after dyno with maxbore TB/ port matched PRC/ Top end RH. To show the gains from a stock tb/ prb IM/ DCRH to that.
Nitrofaint
09-17-2011, 11:05 AM
310 injectors and one step colder plugs would work great.
Blah1219
09-17-2011, 11:22 AM
When you say one step colder, you mean k20a2 spark plugs, right? Since the a2 sparkplugs are one step colder than the a3 plugs. I believe so.
AKEP
09-17-2011, 12:43 PM
i dont think there is a difference between factory plugs, you'll have to go and buy them, unless you have ik24's laying around. stock are identical to ik20's.
Blah1219
09-17-2011, 01:02 PM
When I go to hondapartsunlimited.com they show 2 different part numbers. K20A3 is a cold rating of 6 and k20a2 is a cold rating of 7.

K20A3 = IZFR6K-11
k20A2 = IFR7G-11KS

isn't the ik24s for forced induction/ nitrous applications?
Nitrofaint
09-18-2011, 11:04 PM
When I go to hondapartsunlimited.com they show 2 different part numbers. K20A3 is a cold rating of 6 and k20a2 is a cold rating of 7.

K20A3 = IZFR6K-11
k20A2 = IFR7G-11KS

isn't the ik24s for forced induction/ nitrous applications?

Yes, you do not need them. Getting a plug out of your heat range will do more bad than good.
Blah1219
09-18-2011, 11:21 PM
Yes, you do not need them. Getting a plug out of your heat range will do more bad than good.

So I should go with the k20A2 cold rating of 7 [IFR7G-11KS] since I'll be running a higher comp. ratio, correct? Kinda getting lost in this thread hahah

I believe it goes:

IK20 = 6
IK22 = 7
IK24 = 8
fEPst3r
09-19-2011, 03:02 AM
run ik22s
Nitrofaint
09-22-2011, 11:25 AM
run ik22s

:yeahthat: