Mythbuster/Does-it-work? Spark plug cables

[Md.Nurzairie]

Hy i have my engine 4G91 cable have problem where i can find & buy near shop in kUala Lumpur guy k Thanks

 

[Izso]

Hy i have my engine 4G91 cable have problem where i can find & buy near shop in kUala Lumpur guy k Thanks

Dude, strongly suggest you go to their website and go to the "Contact us" page. http://best-itech.com/contact.htm

I'm not a seller or distributor, just a ZTH contributor

 

[LittleWhiteWagon]

Hy i have my engine 4G91 cable have problem where i can find & buy near shop in kUala Lumpur guy k Thanks

Halfcut shops, sunway workshop area. Tons of spark plug cables to choose from there.

 

[drjoe]

oh ya.. forgot to include plug cable in my 1st stage modification.. hehe..

anyway, it's good to have an aftermarket plug cable.. but u also need an aftermarket distributor and/or coil to go with it as well


Air + Fuel + Spark = Power

More Air + More Fuel + More Spark = More Power

In my opinion, the first stage modification should consider to choose a suitable spark plug cable, which determines the spark energy for the engine.

As in the Dynamometers Testing of engine types with various designs of ignition system, for examples, carburetor, Coil- Distributor and Advanced Injection. BEST I Cable had been tested as a direct replacement of OEM cable (use OEM distributor and coil) without adjusting of any ignition parameters showed higher LAMBDA value (Air / fuel ratio) at all engine variable speed (2000 -7000 RPM) which means improved the fuel combustion efficiency, that in line with its strong spark energy of BEST I Cable, which gives faster conversion of burning fuel to vehicle power, no misfire, quicker acceleration, smooth and quiet idling. It provides the best support for the high out-put engine, and reduces the risk of engine over-hauling, maximize the service life of the Coil, Spark Plug and Catalytic Converter.

---------- Post added at 01:45 AM ---------- 6 hour anti-bump limit - Previous post was at 01:34 AM ----------

for an NA to increase 8 to 10 ps is no easy task. Then again i've heard that dynojet and dynodynamics yield a 20% difference , so in the event you 1st dyno in dynodynamics , then go dyno again in dynojet ( similar car ) doesnt mean u gain 20% power

visit the best-itech.com, the success stories of the Technical Bulletin.

---------- Post added at 01:57 AM ---------- 6 hour anti-bump limit - Previous post was at 01:45 AM ----------

Fair observation, and agreeable. Looking forward to your dyno, since numbers walk the talk.

Personally I won't invest so much in cables since over time they will corrode/oxidize.. and more interested in active spark amplifiers such as those that raise the voltage for spark plugs or something like okada projects.. not sure how those works.

I agree the cable with metal conductor will corrode / oxidize, but BEST I Cable does not use metallic conductor. Cable does not contain electronic component. Spark amplifiers electronic device may deteriorate after performance ageing under high under-hood temperature. It still rely a spark plug cable to conduct the high voltage current for the spark plug.

 

[lkeong88]

Erm, I don't understand your lambda part. If lambda higher, AFR = higher rite?
If AFR high means you are running lean
When you lean out, you have more heat than usual
When you have more heat than usual, you ignite your fuel before it can spark hence knocking?
Then furthermore, if you rev high, the high heat = piston meltdown?

Surely if you use a car which the mixture is rich (most stock ecu) you may feel its a bit laggy, but its to increase the lifespan of the engine. But yours lean it out? Then the ECU eventually will compensate (of course up to a certain extent). Then that may explain why when Izso put back the stock cables it started to feel like dying because the engine i choking on too much fuel?

 

[Izso]

lkeong88 : interesting theory. Meaning my car has been pumping in more fuel to compensate for the higher lambda readings? Having said that however my FC did not decrease. Still at my usual 13km/L to 15km/L range.

 

[drjoe]

Erm, I don't understand your lambda part. If lambda higher, AFR = higher rite?
If AFR high means you are running lean
When you lean out, you have more heat than usual
When you have more heat than usual, you ignite your fuel before it can spark hence knocking?
Then furthermore, if you rev high, the high heat = piston meltdown?

Surely if you use a car which the mixture is rich (most stock ecu) you may feel its a bit laggy, but its to increase the lifespan of the engine. But yours lean it out? Then the ECU eventually will compensate (of course up to a certain extent). Then that may explain why when Izso put back the stock cables it started to feel like dying because the engine i choking on too much fuel?

LAMBDA data is recorded at the exhaust of the car during the Dyno test, not before the exhaust. LAMDA data is therefore a measure of the fuel combustion efficiency. BEST I Cable has higher LAMBA data than stock cable throughout the complete spectrum of engine speed (2000 - 7000rpm), it can provide better support for the lean burnt engine due to its stronger ignition spark energy. As for lean burnt engine, design of exhaust system will be different to conventional one.

As for the explanation of Izso's observation, its more easy for the ECU to adapt improvement during the swifting of the stock cable to BEST I Cable, however, the actual feel of power improvement will be gradual until the ECU shall be fully adjusted according to the property of BEST I Cable. During the swifting of BEST I Cable back to the stock cable, ECU may be more difficult to adapt from sudden loss of vehicle power. You may say, its more easy for poor guy to adpat rich style of living, however, its quite difficult for rich guy to adapt poor style of living.

 

[lkeong88]

I still don't understand your Lambda part
I derived my explanation from here:

Air–fuel ratio - Wikipedia, the free encyclopedia

I do not mean to offend anyone but since this is a mythbuster, I am more interested in the real science to explain it rather than just hearsay. I am not an engineer or mechanic, but I am a science student, so I am keen on scientific proofs.

 

[Izso]

lkeong : so far the discussion is healthy, so no need for apologies. And interesting discussion. Perhaps this just a matter of terminology?

 

[drjoe]

I still don't understand your Lambda part
I derived my explanation from here:

Air–fuel ratio - Wikipedia, the free encyclopedia

I do not mean to offend anyone but since this is a mythbuster, I am more interested in the real science to explain it rather than just hearsay. I am not an engineer or mechanic, but I am a science student, so I am keen on scientific proofs.

I am a scientist. You can read from the textbook related to automotive engineering, its well being recognized :
1) Air / Fuel ratio ( about 14.7 :1) keeps where LAMBDA =1; wherein the Catalytic Converter to function the best for emission.
2) Air / Fuel ratio of 12 - 13: 1 seemed to maximise the power performance.
3) Air / fuel ration of 15 - 16:1 seemed to be minimum fuel consumption, in this case, the Manifold and Muffler shall be designed to reduce the back pressure due to the input and exhaust air.

In most of engine design, Air / fuel ratio is keep below 14.7:1, and the ideal LAMBDA value is 1 for environmental issue. BEST I Cable improved the LAMBDA data, but without exceeding value of 1.

I hope that explain what you want to know.

---------- Post added 03-22-2012 at 01:19 AM ---------- 6 hour anti-bump limit - Previous post was 03-21-2012 at 10:29 PM ----------

Item #1
Would it be safe to say that the ECU was NOT adapted to the stock cables thus the sputtering, slower revving and sluggishness?

a cable that measures the same, would perform the same. a cable that doesn't, well, doesn't perform similarly. being different doesn't necessarily means better.

also, its safe to assume there's a margin of error between dyno runs, maybe +/- 5%? I'm not sure as I don't own one, but its standard for any measurement device.

Item #2
You mentioned the creator approach OEMs, so is any car manufacturer using it? Just curious.

A few car manufacturers showed the interest in BEST I Cable.

 

[dennisdreams]

diff spark plug had diff char which need diff tuning, cannot really saying the cable was doing all the works but it's the setting also took a lot of measurement as well~

just my 2-cents~ cheerio~

 

[drjoe]

diff spark plug had diff char which need diff tuning, cannot really saying the cable was doing all the works but it's the setting also took a lot of measurement as well~

just my 2-cents~ cheerio~

I agree with you, proper choice of the spark plug type (e.g. hot type / cold type, spark plug tip gap, and etc) is important to optimise the engine performance, the function of the spark plug cable is just to conduct the high voltage current from the ignition coil to the spark plug. Spark plug cable has stronger ignition spark energy that enable to have the self cleaning of the carbon deposits from the spark plug, especially when the vehicle is running at a speed of exceeding 80 Km/Hr, that can reduce the carbon fouling of the spark plug avoiding the misfire problem.

 

[langsuyrx]

not long after this, imitation will flood the market.. keep genuine to keep the fire goin...

 

[Izso]

Argh.. haven't had the time go re-do my dyno!

 

[Andy0625]

Is Best I cable the same thing as Pronto cable?

Pronto Hi Performance Spark Plug Cables - Car Accessories & Parts for sale Selangor - Mudah.my

 

[Izso]

I honestly have no idea!

 

[cvkit17]

I've got something in my mind. What does the ECU adapt to, when we have a bigger spark? The controllable parameter to the ECU is fuel. When less air going into the chamber, the ECU adjust accordingly to it. But when we have a bigger spark or misfire, as far as I understand, the ECU does nothing to counter it as it has not control over them other than providing signal to give electricity at the right time. Unless I am wrong. Any bro can clarify?

 

[D7zul]

IMHO, ECU control fuel & spark timing

It detects air by AFM, MAP, etc & inject fuel according to the programmed air fuel ratio

And it checks with knock sensor & oxygen sensor

Then it adjust the fuel & spark timing accordingly

VTEC, VVT, etc has another set of programming n sensors

This is from my knowledge la. I could be wrong

---------- Post added at 01:19 PM ---------- 6 hour anti-bump limit - Previous post was at 12:54 PM ----------

I've got something in my mind. What does the ECU adapt to, when we have a bigger spark? The controllable parameter to the ECU is fuel. When less air going into the chamber, the ECU adjust accordingly to it. But when we have a bigger spark or misfire, as far as I understand, the ECU does nothing to counter it as it has not control over them other than providing signal to give electricity at the right time. Unless I am wrong. Any bro can clarify?

ECU didn't detect a bigger spark. It just detect knock & oxygen

If it detect knock, it will inject more fuel & retard spark timing

If it detect less oxygen, it will inject lesser fuel & advance spark timing

In the case of bigger spark, the oxygen has been burn completely..

So, ECU will reduce the fuel & u'll get better FC

I stand corrected

 

[cvkit17]

I agree that spark timing is to avoid knocks..I get the theory of bigger spark results in better combustion i.e. a more complete burning. But I personally do not think that it affect or being effected by AF ratio. Of course, with bigger spark, better combustion, thus more power and smoother ride. I think it actually improve the burning efficiency instead of providing more fuel/air.

I believe that a good ignition cable can improve the car responsiveness and "smoothness" we called...berapa RM sebiji btw?

 

[achelone]

when the burning is complete, how more complete can it be? if your ignition is weaken then replacing worn part will get the original performance back....but it will never obtain more than original....this excludes tuning topics and etc.....that another story...