what would be the best spark plug for my s/c with modds. they have so many new spark plugs that i dont know whats good, also should i go a step colder or leave whats on there (stock).

 

http://www.dezod.com/cat_spark.cfm

most turbo guys go one step to two step colder

 

you should be good with step 1 colder.. gap it around .035" but that depends on your goal or current hp, they said a step colder more every 100 hp gain from stock

 

Does changing plugs effect your tune at all?

 

very little if not non at all.. it just makes your car burn cooler, more tolerant to boost

 

Thanx

 

Turbo guys also move from stock spark plugs to one or two step colder plugs.
Supercharger kits already include two step colder plugs.


There really aren't any better plugs for the money than NGK plugs. Plugs to stay away from are most of the Bosch plugs.

 

Denso IK24's. great plugs.

 

how do u kno what to gap the plugs?

 

A sticker came with my s/c that got put on the under side of my hood that shows a coupe of key parts and the plugs with gap size. Also says in the little book that comes with the car, but I think those gap sizes were for stock engines.

 

ya i have no idea what to gap mine.. i just got NGK 2 step colder..

 

from the S/C manual:

TRD Spark Plug: Denso K22PR-U
Gap: 0.032” +/- 0.002”
(0.81 mm +/- 0.05 mm)

 

bcpr7es NGK great plug and is colder tha stock

 

i have mine gapped how they come. .35 or .035...whichever sounds right.


you shouldnt gap iridium plugs.

 

arite good to know...

 

so from the trd kit should i go a step colder or stay with what i got and what kind of plug should i use like i know NGK but what kind like they have the Iridium IX, LASER IRIDIUM, and other kindfrom them, has anyone tryed the pulstar pulse plugs?

 

ok so i just need one answer, Should i go a step colder then what i have or leave it. now i do have almost all the modds i could put on without changing the map. (i/h/e/pulleys.)

 

id go with 2 step colder iridium plugs....thats just me though

 

2-step colder than what? Stock? Or 2-step colder than the ones that came with the supercharger (which already are 2-step colder than stock)?

Unless you're pushing more than 10psi with the supercharger, I don't see a real need to go with a colder plug than what came with the supercharger kit.

 

i meant 2 step colder than stock........good grief
ngk brand pn#bkr8eix
cheaper than denso

btw show me the part number for 4 step colder than stock plugs