Info: Spark Plugs

[outworldly maniac]

^^^^

Iridiums don't need rejetting. Rejetting is only done if you play with the intake/exhaust. In case of a free flow filter, you need more fuel to compensate for the increased air flow. And if you are going in for a free flow exhaust, a richer jetting helps your exhaust valve stay cooler, thus eliminating heat damage to the exhaust valve.

Cheers,

Jay

thanks a lot Bro

[:':captain:':]

^^^^

Iridiums don't need rejetting. Rejetting is only done if you play with the intake/exhaust. In case of a free flow filter, you need more fuel to compensate for the increased air flow. And if you are going in for a free flow exhaust, a richer jetting helps your exhaust valve stay cooler, thus eliminating heat damage to the exhaust valve.

Cheers,

Jay

thanks a lot Bro

yep. no JETTING for IRIDIUMS.... JAY ur rite man..
M using iridiums from last 9000kms, no prbs at all...

[yashdiep]

here are the pics .....

Folks, I used the same on my ZMA. Believe me, you can really feel the difference!!! The bike revs much smoother, pick-up is increased and reduced vibes at top end.. NGK Idridium rocks!! I got it for 550 bucks in A'bad!

[yashdiep]

Its surprising, u've got the wrong suggestions. World over K&N is used in dirt racing and all kinda terrain where the conditions are more punishing than your road scene. Do those engines get ruined? Race engines are more sensitive to dust and dirt. U just need to jet it right to avoid leaning the engine too much.

@ - I'd suggest u use the stock plugs for optimum performance during all weather conditions. Or, if u insist just use the NGK CR8E. Will just help run ur engine a bit cooler.

No offence buddy, but even my mech shared the same opinion. He's not in the favour of installing K&N because of the unhealthy road conditions in India (especially A'bad ). K&N sucks more air, hence sucks more dirt which in turn is stuck into the carb!!

[Raccoon]

^^^ Its not just that proportionally more dirt enters due to higher volume of air; but K&N's filteration capabilities are questionable. K&N itself seems silent about this most important issue. If you value the life or your engine, stick to stock filter. And unless we have data on how long those race engines lasted with and without a K&N, saying that the engines are not getting ruined makes for a bit simplistic thinking.

Ditto with stock spark plugs. Iridium in fact may effect less complete combustion in a well tuned and maintained engine. This has been discussed before... Lastly, a colder plug does not mean the engine runs cooler (at least not significantly). Its just the plug that will run cooler.

[yashdiep]

Yeah, These are the side effects...

But then, when you have more amount of clean air, and a larger ammount of fuel, the energy obtained will be more since the fuel is burnt more effectively.

If we could find a smaller K&N Filters, then maybe you can have the volume of air that dosen't make your engine run lean for the stock jets.

Besides, in India, allmost every component is designed with cost in mind. Even on Performance bikes like the Apache, KArizma, P220 mpst componenets that donot add to retail value rarely get improved. While adding a good Custom Designed K&N Filter will push the bikes further, manufacturers simply dont use them cause an increase in the price by 2000 is not justified by a good air filter, from the customer point of view...

Some people are refusing to pay an addl 9K INR for Fuel Injection and a Rear Disc Brake, when they know perfectly that both of these are far ahead of the carbs and drums.

But if you add a good fairing, some good stickers, and a radical new paint job and promote a cut down machine with some media hype and head turning looks, ppl wil gladly pay for it.

Sorry for going OT, But yeah K&N does make a difference.
It delivers more power for the same amt of fuel. and hence should theoritically give better mileage. But most people who add K&N Filters, rev hard and push their bike to its limits (Which would have increased wrt stock config) and hence stand to loose a bit of mileage

ROFLMAO! Hero Honda is already doing the justice!!

[jayprashanth]

^^^ Its not just that proportionally more dirt enters due to higher volume of air; but K&N's filteration capabilities are questionable. K&N itself seems silent about this most important issue. If you value the life or your engine, stick to stock filter. And unless we have data on how long those race engines lasted with and without a K&N, saying that the engines are not getting ruined makes for a bit simplistic thinking.

Ditto with stock spark plugs. Iridium in fact may effect less complete combustion in a well tuned and maintained engine. This has been discussed before... Lastly, a colder plug does not mean the engine runs cooler (at least not significantly). Its just the plug that will run cooler.

About the K&Ns not filtering well, the debate is still on. For starters, K&N do have a chart on every filter box that shows their filtration ability in decent shape. But, there was this Spicer report which has run down K&N.ISO 5011 Duramax Air Filter Test Report

But, the question is whether the Spicer report is reliable or is it some vested interest looking at gaining market share by running K&N down.

Coming to the Iridiums, I have had personal experience on my LB500 where the performance/throttle response has become way crisper than conventional NGKs under dry conditions. About Iridium effecting lesser combustion, I do agree, but only under specific conditions. The Iridium(of the correct heat range) showed more fuel/soot deposits even when I was running real rich than my conventional NGKs, especially in torrential rains(with a K&N pod). So, I guess it works decently if jetting is sorted out whereas it is more susceptible to fouling when the jetting is rich, more so, if you add a free flow filter into the equation. So, K&N+Iridium: works well with the jetting spot on. Otherwise, it will play havoc during the monsoons when the K&N struggles to keep the increased air flow levels. This will foul your plug in no time. I faced this just yesterday when I was trekking up Tungi fort.


Cheers,

Jay

[abhifusion]

guys , i have P220 Fi ... Using NGK IX since bike was in run-in period... clocked 22k kms till now... can anyone tell me whats lifespan of iridiums ?

[outworldly maniac]

He was sandpapering which spark plug?? If its a platinum or iridium plug, then its done for!

You want BPR8HS for which bike? Suggest you don't use this for the older 2 strokes. Use MICO W5BC - works good and is inexpensive. Else get BP8HS from a TVS dealer/spare parts shop. AFAIK its a Jap import. Price is also steep at something around Rs. 165. I actually experienced deterioriation in performance with the platinum BPR7HGP in my Shogun. See what works for you...

how much does a new MICO W5BC cost approx ?

Is there any better plug available and its cost ?
i meant at some Rs extra

asking so that dont get cheated by the dealer
not asking about those hi - fi iridium plugs

thanks again

[Raccoon]

IIRC, MICO W5BC costs around Rs. 60. About BP8HS I have already mentioned. Just make sure its genuine... try getting the former from a MICO authorised dealer only. The latter is available only from TVS (for the Shogun).

Both are good. Don't waste money on anything else. The Jap made BP8HS is said to last longer... I haven't confirmed this though.

[outworldly maniac]

MICO BOSCH or an NGK ?
Guys what do you have to say ? Which one according to your experience is better?? I am talking in terms of clean cumbustion .. I dont care about SPARK PLUG LIFE ...
And heard NGK Iridium needs spot on or near to spot on jetting otherwise gets fouled easily ... is it true according to you ?
Would the Dual Electrode one that BOSCH offers will help in clean combustion over the Iridium or one elephant is stronger than two horses ?

EDIT : just read there is a four electrode plug of bosch also available
so put that into the equation also pls

thanks

[Raccoon]

The 2/3/4/x electrode BOSCH plugs will do nothing (over a optimally set single electrode plug), for cleaner combustion. On the other hand it may impede it.

[outworldly maniac]

Are you sure racoon bout the BOSCH plugs not being so good ...

[:':captain:':]

Are you sure racoon bout the BOSCH plugs not being so good ...

YES, iridiums are far better than anything. BOSCH is good. NGK specially iridiums are best. Their self cleaning property will keep ur bike clean. My on my 11k kms with my NGK, no prbs.

[Raccoon]

Are you sure racoon bout the BOSCH plugs not being so good ...

On what basis do you think the extra electrode plugs will help in cleaner combustion? Dosen't work that way. At best, you can expect longer plug life and you'll probably not need to gap them for their lifespan. Whether they impede better combustion would depend on an individual bike's engine design. Stock is best... BOSCH or NGK. Don't waste money on Iridiums or extra electrodes, etc!