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Bill... That's twice someones alluded to Densos f&@king up you're engine. Care to ellaborate? I've heard many people rave about Denso plugs (on other cars fair enough)? Would be good to know specifics in case I opt for them in the future?
NGK's at my local parts shop, £7.50 eachgood price
Are they the platnium ones? thats good price there £11 odd from TPS
A decent spark will mean a better flame in the combustion chamber.
As said in previous post, not flame plug at all! When the spark ignites the fuel, there is a flame. As a mechanic then you should know this is the Bang in Suck, Squeeze, BANG, Blow.
I did also say buy the NGK plug, which is, as you know the same as the OEM ones. I wasn't saying use cheaper plugs like Champion or ECP cheap version!
Another thing, I wasn't comparing a road car to a F1 car, just giving an example of why a more quality plug should be used.
Sorry if I wasn't more clear.
It isnt really much of a flame is it lol its an explosion in the combustion chamber, saying a flame people will get the wrong idea of it, its more like if yuo was to blow up a gas canister, if you was to light the ammount of fuel injected with a lighter nothing would happen really, but once its compressed etc the fuel is burnt in more of en explosion than a flame, any way why we going down this road.
turbin
Guest
I'm starting to doubt your knowledge here. Fuel/air mixture burns in a controlled state, it doesn't explode. Explosion in the combustion chamber would be more akin to detonation, something which would spell the end of the pistons.
Well you know what mate, dont read my post's Dont care what you think, let me guess you have a masters degree in automotive engineering or your a mechanic for ferrari, oo oo lets guess bugatti?
A flame is a flame yeh, an explosion is what pushes the piston down? Correct, a flame is a flame, a lighter flame a bonfire flame or a cooker flame?
So what about diesels? Explosion again, only a diesel explosion is more intense, hence why diesels need stronger con rods and cranks, the piston doesnt take the force of the explostion it simply goes up and down, its the con rods and crank what take the force hence why people change them for forged ones right? Pistons are usualy changed to alter compression ratio's either lowerd or increased yes?
Ok right, so we move onto fuel, explosion isnt like on movies or as you think BOOM and things fly everywhere and smoke and fire etc.
So lets define explosion -
•An explosion is a sudden increase in volume and release of energy in an extreme manner, usually with the generation of high temperatures.
Right so there you go, as fuel ignites, it creates energy yea? and the gasses expand, pushing the piston down right? As a byproduct of this we have a gas which we then need to get rid of, so thats where we get exhaust gases from yea?
Stuff like knocking/pinking is going into when the fuel ignites and how it ignites which is a diffrent matter all together and is nothing to do with spark plugs.
If you question my knowledge feel free to, everyone has diffrent ways of explaining things yeah? Or is it we all have to know your way, and your way only?
A 1.99 spark plug and a 5.99 spark plug both copper core produce near enough the same spark, the reason the dearer one is better is due to the fact they probably last longer? There again, a cheaper plug can last just as long as an NGK? Everything has a life span doesnt it? The guy asked what plugs should i buy, a spark plug is a spark plug, it does one job and one job only, to ignite the fuel/air mixture. Stuff like iridium plugs i think i said make little or no diffrence in the car unless your runing a highly tuned engine which you can get benifits of decent plugs and decent fuel.
I simply dont care what you think about my knowledge to be honest, as long as i know what i know im a happy bunny. People sit behind there computer and say this and that and im right na na na, its a public forum, everyone is entitled to say their peice arent they? If not then why dont we just have you replying mr know it all?
Dont care what you think, let me guess you have a masters degree in automotive engineering or your a mechanic for ferrari, oo oo lets guess bugatti? A flame is a flame yeh, an explosion is what pushes the piston down? Correct, a flame is a flame, a lighter flame a bonfire flame or a cooker flame?
So what about diesels? Explosion again, only a diesel explosion is more intense, hence why diesels need stronger con rods and cranks, the piston doesnt take the force of the explostion it simply goes up and down, its the con rods and crank what take the force hence why people change them for forged ones right? Pistons are usualy changed to alter compression ratio's either lowerd or increased yes?
Ok right, so we move onto fuel, explosion isnt like on movies or as you think BOOM and things fly everywhere and smoke and fire etc.
So lets define explosion -
•An explosion is a sudden increase in volume and release of energy in an extreme manner, usually with the generation of high temperatures.
Right so there you go, as fuel ignites, it creates energy yea? and the gasses expand, pushing the piston down right? As a byproduct of this we have a gas which we then need to get rid of, so thats where we get exhaust gases from yea?
Stuff like knocking/pinking is going into when the fuel ignites and how it ignites which is a diffrent matter all together and is nothing to do with spark plugs.
If you question my knowledge feel free to, everyone has diffrent ways of explaining things yeah? Or is it we all have to know your way, and your way only?
A 1.99 spark plug and a 5.99 spark plug both copper core produce near enough the same spark, the reason the dearer one is better is due to the fact they probably last longer? There again, a cheaper plug can last just as long as an NGK? Everything has a life span doesnt it? The guy asked what plugs should i buy, a spark plug is a spark plug, it does one job and one job only, to ignite the fuel/air mixture. Stuff like iridium plugs i think i said make little or no diffrence in the car unless your runing a highly tuned engine which you can get benifits of decent plugs and decent fuel.
I simply dont care what you think about my knowledge to be honest, as long as i know what i know im a happy bunny. People sit behind there computer and say this and that and im right na na na, its a public forum, everyone is entitled to say their peice arent they? If not then why dont we just have you replying mr know it all?
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Once again Shaunyboy, petrol or diesel, it makes little difference. The fuel/air mixture does not explode. But you're correct in one respect. I'll not be reading any more of your posts.
Diesels are a diffrent world in every aspect, but its a fuel being burnt, diesels are ignited by compressed air, and petrols by spark, diesels dont have a throttle, diesels have a higer compression ratio..
turbin
Guest
3 out of 4 of the plugs shed their ceramics into my engine, and damaged/wrote off my cylinder head, valves, pistons and new GT35 turbine wheel on my brand new GT35.
Denso's technical assitance was abysmal, with the final straw being they would not stand behind the advised plug for my application, and could not confirm it would work
NGK were on the ball and advised sensible heat range plugs and confirmed they would be ok.
In the drag racing scene, the same insulator failure for same given heat range as their non failing competitors is common on Denso's to the point they are not used by the vast majority.. £30-£40 of plugs caused me a few £1000 of damage
NGK's get my vote.
Denso suk imho
way too big a gamble for me, when they wont stand behind their product when pushed to guarantee it. says it all to me.
This was going to be my next point - I guess the suggested heat range was wrong for your set-up? Cos surely you get a plug that'll draw the heat away from the tip better? (colder range) preventing it from breaking up?
Cheers for the info - I'll keep that up my sleeve for the next time anyone is raving about them over another brand.
P.S. ShaunyBoy - Have a search for Flame Propagation/ Flame front in internal cumbustion engines. There's much information and many studies into exactly how flames propagate from the spark plug! and how this affects performance!
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