Spark Plugs

[~Veer~]

If i add some very high quality sparg plugs and spark plug wires what kind of a difference will it make with my car

[Flashmn]

None...

[huangxin]

Originally Posted by Flashmn

None...

+1

the VVTi 1zz's already requires iridium plugs which are top quality spark plugs

[PhatRoyale]

Indeed.

+1 on Flashmn's post

[Flashmn]

Iridium is just a longer lasting plug as it doesnt burn away as easy. Still never the less, plugs are not power givers, they just ignite the mixture.

[Downhillzze110]

plugs don't make power. they free power your car forgot with junk plugs.
i.e
if you have the OEM plugs (the plugs that the car rolled off the NUMMI or CMMI line with) they're probably missing or not hitting hard enough. after a while, your engine realizes this and detunes the fuel curve. which would result in sluggish acceleration, bad gas mileage, and low top end power. the new plugs would hit right and your computer would reoptimize the fuel curve accordingly.
so lets say for argument sake that a stock 01 corolla 4spd puts 100 bhp to the wheels
with junk plugs you may be doing 90 bhp
with brand new plugs, you're doing 100 bhp again.

we really need to have a sticky that says in large BOLD letters
PLUGS DO NOT ADD HORSEPOWER

[PhatRoyale]

Originally Posted by Downhillzze110

plugs don't make power. they free power your car forgot with junk plugs.
i.e
if you have the OEM plugs (the plugs that the car rolled off the NUMMI or CMMI line with) they're probably missing or not hitting hard enough. after a while, your engine realizes this and detunes the fuel curve. which would result in sluggish acceleration, bad gas mileage, and low top end power. the new plugs would hit right and your computer would reoptimize the fuel curve accordingly.
so lets say for argument sake that a stock 01 corolla 4spd puts 100 bhp to the wheels
with junk plugs you may be doing 90 bhp
with brand new plugs, you're doing 100 bhp again.

we really need to have a sticky that says in large BOLD letters
PLUGS DO NOT ADD HORSEPOWER

Agreed 100%.

I copied your post to the 8th gen Corolla FAQ thread.

[Downhillzze110]

thank you. its a bit of a pet peeve for me. its the same thing for 'performance' plug wires. you see people buy those 200 dollar 8 mm plug wires for stock engines... you don't need that. unless your running boost or have an insane amount of spark potential coming from your coils

[REN69]

it will run smoother, cleaner, waste less gas and will gain 0.500 hp!

[PhatRoyale]

Originally Posted by REN69

it will run smoother, cleaner, waste less gas and will gain 0.500 hp!

oh snap!

All that from a basic maintenance item? WOW!

[vargascr]

Do you use one or 2 electrodes spark plugs ? I will replace the spark plugs in my car soon, gimme your suggestions to buy my new ones please. Brand/Part number.

Corolla 99 1.8L no VVTi

[fishexpo101]

OEM plug on that car was a two pronged copper plug - assuming the Corolla in your area is similar to the ones in the US. You can use the iridium plugs from the Corollas that have VVTi - won't hurt anything, just a more expensive plug that have a longer useable lifespan.

Right now - I'm running NGK Iridium IX, part number BKR5EIX-11. A fine wire electrode type, I like them because it seems to get a little better fuel economy, easier starts, smoother idle than the OEM Iridium plugs (NGK #IFR5T11). Drawback with them is their lifespan is shorter. OEM Iridiums can last up to 120,000 miles - the Iridium IX should be replaced between 30,000-60,000 miles. I've been getting about 45,000-50,000 miles on those plugs.

[PhatRoyale]

Originally Posted by fishexpo101

Right now - I'm running NGK Iridium IX, part number BKR5EIX-11. A fine wire electrode type, I like them because it seems to get a little better fuel economy, easier starts, smoother idle than the OEM Iridium plugs (NGK #IFR5T11). Drawback with them is their lifespan is shorter. OEM Iridiums can last up to 120,000 miles - the Iridium IX should be replaced between 30,000-60,000 miles. I've been getting about 45,000-50,000 miles on those plugs.

+1

I'm using the same plugs right now and have noticed similar results.

Big plus is that they're not that expensive for an Iridium plug.