Spark Plugs

[kris_]

Hey guys, what spark plugs are recommended for a turbo B16A, also what should i have them gapped at?

[DLO01]

Heat Range 7

Gapped at 0.8mm

Sorry for the quick response, but gota go......:thumbsup:

[BLKCRX]

I disagree ! spark plug gap is all about what kind of ignition setup you have, you should run the maximum possible gap. The standard Honda plug gap of 1.1 is perfect for up to 10psi of boost on a standard engine and standard coil, without any miss firing.
Spark plug gap tuning and even indexing are all just important things, almost just as much as tuning.
The preferred plug I use is a NGK BKR7e-11 this is one step colder than standard, infact I use these plugs on tuned NA cars also.
For higher boost levels above 10psi you more than likely will have to decrease your gap, but again this should be done by your tuner ! if your not miss firing there’s n need to decrease your gap !
Any boost levels above 15psi and I only recommend a NGK RSA Plug.


Regards James

[jun]

try denso iridium power .. model no. i think is Ik20 (20 = ngk 6, 22 = ngk 7)
good stuff :D

[yourfather]

I have NGK iridium plugs in my stock B18C...
for some reason.

[civiceg9]

Hey guys, what spark plugs are recommended for a turbo B16A, also what should i have them gapped at?
Get heat range 7 so that it can remove more heat away from the engine.
The each heat range up will remove approx 70°C to 100°C of heat.


I have NGK iridium plugs in my stock B18C...
for some reason.
There are 2 types of NGK Iridium Plugs available
the 0.8mm tip long life Iridium, claim to last 80,000km - 100,000kms
and 0.6mm tip performance Iridium IX plug, claim to last 40,000kms - 60,000kms

Iridium are cheaper then Platium plugs, hence will most ppl just use the iridiums.
Is it standed item on alot of new Hondas as it helps with LEV. :thumbsup:

[BLKCRX]

Do not use Platium or Iridum spark plugs in your car when your turbo charged !! its just WRONG !! the electrode at the end of the spark plug is very small compared to that of a copper plug these very small electrodes can heat up much more faster on a forced induction car due to the massive amounts of extra heat generated with each combustion ! this excess heat can and will cause the electrode to break off and go though your engine ! this is why most stock turbo car’s use a copper plugs !

Use a copper plug, there stronger, and cheaper, and the best conductor of electricity only problem is they wear out quick ! so just replace them every 5000km !

[bennjamin]

Use a copper plug, there stronger, and cheaper, and the best conductor of electricity only problem is they wear out quick ! so just replace them every 5000km !

totally agree ~ even with NA or stock setups im sure theres no problem with changing copper plugs every 5,000kms

[civiceg9]

Some information on plug range, iridium and performance gains from NGK
__________________________________________________ ____________

The use of Iridium spark plugs is only just starting with Japanese car manufacturers who are finding them ideal for very low emission engines.

Heat range selection is vital to ensure optimum performance of spark plugs.

A spark plug's optimum operating temperature is between 450 degrees C and 870 degrees C. Spark plug tip temperatures outside this range can occur when an incorrect heat rating is selected. Viz:

When the heat rating is too high:

The spark plug temperature remains too low and causes deposits to build up on the firing end; the deposits offer an electrical leakage path that gives rise to loss of sparks.


Heat Range

With modified engines (those engines that have increased their compression) more heat is a by-product of the added power that normally comes with increased compression. In short, select one heat range colder for every 75-100 hp you add, or when you significantly raise compression. Also remember to retard the timing a little and to increase fuel enrichment and octane. These tips are critical when adding forced induction (turbos, superchargers or nitrous kits), and failure to address ALL of these areas will virtually guarantee engine damage.

An engine that has poor oil control can sometimes mask the symptom temporarily by running a slightly hotter spark plug. While this is a "Band-Aid" approach, it is one of the only examples of when and why one would select a hotter spark plug

Standard NGK R Plugs with Nickel Alloy Tip Melting Point is 2250'C

NGK Plugs with Iridium Tip Melting Point is 3500'C


Q: How much of a performance improvement can I expect from changing plugs?

A: A common misconception is that changing spark plugs will result in a large power increase. In most cases, removing even seriously worn out spark plugs will only result in very modest power gains, typically about 1-2% of total engine output. This could be even less for computer-controlled vehicles, primarily because most newer vehicles have more powerful ignition systems and the vehicle's computer can make adjustments so that vehicle operation seems smoother and more seamless.

Many people think that simply supplying more spark to the firing tip can and will combust more fuel. What they don't understand is that most newer cars' engines are so efficient that they are already burning all of the available fuel. Simply adding more spark voltage can't burn more fuel because there is no more fuel to burn.

When a stock or near-stock engine is given a fresh set of spark plugs, peak efficiency is restored. The power gains that come from this restored state of tune are usually minimal. Any company that tells you that their spark plug will provide significant gains in power in a stock or near-stock engine is making blanket statements that may not be supportable.

[superR]

spark and missfire has been quite a problem for me..... i've used standard plugs , denso plugs irriidum plugs , but so far i find the irridiums to fire better.

[yourfather]

well, at least I know that they are going to last a while.

I had the ones that they suggested for a DC4 in it, and noticed a lot of black smoke as I was accelerating 5-8k rpm

and when I got the iridiums, I found less smoke...

[Weq]

BKR7E-11's

gap'd at .032"-.028" for a 120k stock ignition.