What do you advice on plugs for DRAG Racing?
Denso Ik24, NGK Bkr8eix...?

 

What did you get it tuned on? How many pounds of boost? Your not gonna notice a big big difference unless your currently blowing out spark or fouling plugs and your trying to fix that issue,,with that being said from my expierence the NGKs are in stock at local parts stores... NGK is a good plug I wouldnt go with the eix. Iridium tips burnt hotter.. Go with the basic standard cheap ngk copper core...

 

15-20 lbs max on pump fuel or 25lbs C16 Fuel.

Which cheap NGK plugs?

 

Keep it simple. NGK BKR7E.

 

boost pressure isnt the deciding factor on what plugs heat range you run. Its the HP your makign or tryign to make. generally you can make up to abotu 500whp on a 7 heat range give or take and after that you need 8's till about 750-800whp and 9's after that i believe

 

Im using NGK 4091's

 

I've seen good results with NGK 4554 but then again every build is different good luck..

 

Okay. At the moment 15 PSI on Denso IK24. I'll try with 4091 or BKR7 next

 

IK24 works great @20 PSI, do you have others feed abck?

 

Im using them now too, happy with the results

 

ZFR6FGP (7100) @ .035, however those might be a bit too hot for your turbo engine

 

Learn to read plugs.

 

This ^

That's a one step colder burning copper plug. They're already .030 right out the box, but you should always double check. I run them at .028 and they take a beating with boost, antilag, and track days. Plus, they're cheap and usually in stock at NAPA.

 

I'd start with a 8 and work my way down if needed. I use R5671A-8 for track days and R5671A-7 for street use.

 

Agreed...

Every setup is different...

Those with smaller turbo's, pushing them harder with higher IAT's and closer to knock limit will require colder plugs.

Usually I stop at 450 WHP on 7's, but it also depends on compression ratio, fuel type, etc...

There is no problem using 7's up to 500+ WHP on a SOHC with Vitara's for example. Try that on a B18C JDM R motor and it may not like it so much.

So there is no true answer, just like those millions of questions in the past regarding what ignition timing to run.

 

+1.

Put 7's in, start with those. They are a step colder then stock plugs(which are 6's) and i suggest using Copper 7's or resistor 7's, you can find both from xeonocron..

Run the plugs, and see how they look. If you can't read plugs or are too lazy to learn how, post pics, i'm sure if the pics are clear enough i can , or others can read them for you.

Look for the fuel ring to be black on the bottom, you'll need at least 3-5 threads colored to know you have the proper heat range, Make sure there's no "red pepper" specs or "shiny" metal flakes.

There's plenty of threads on here about reading plugs..