As a few of you will know, i run Denso Irridium IK31 plugs in my car

anyway, on the way to the blackpool pissup last week, i noticed a small misfire when accelerating in 4th and 5th and a bit of unburnt fuel out the back.

upon inspection today of the sparkplugs, 2 of them (numbers 3 and 4) had showed signs of a heat related failure.

#3 plug = the insulator was slightly loose in the body of the plug

#4 plug = the whole insulation was freely spinning round inside the plug and carbon had blown up the middle of the plug



This also happened when running IK27's in germany aswell on one plug, but on a different cylynder (number 1)





has anyone else had any problems with running these plugs - IK27 or IK31 in their cossies? as at 40 to 50 quid a set, they are bloody expensive to only last 4000 miles

 

and before anyone says "get your car set up" or "you car isn't set up properly", the car was setup by Stu before we went to germany and has absolutely NO problems at all apart from an appetite for 50 quid plugs

 

Need to be looking at the fuelling Gracie, something may well be amiss with it somewhere now since we did it. I have customers with FAR bigger power than yours running these plugs with no problems at all, including my own which at a guess have covered over FIFTEEN thousand miles now pal!! You must have done a good few thousand since i saw you?

 

this is true Stu - may be time for me to buy a set of them there black injectors from yourself as i'm sure the greens can't handle the top end fueling - as the ik27 only failed after that 150-160mph blast down the autobhan on the way home

 

this aint the first time ive heard this on denzos , stu recomended 071cs ages ago to me and thats wats in there spot on , save ya cash man .


jay

 

Go and get your car set-up matey

 

701's mate


speak to alexzvhcabrio ( also ask him to shorten his user name soo )

he might still have some left

 

Dont disagree with you very often Jay, but the trouble wont be the plugs they are the best. .

 

ok mate i have no knowledge of just that rice rockets use em but they seem to fail


cheers jay

 

whats the finis code for 071 plugs people? or it might just be easier to ask Stu to post a set for me after crimbo

 

1120834 071s

 

excellant - much appreciate that

 

why are people spending £50 + on plugs when harvey uses rsturbo ones ( <-- real tears ) in his 400+brake engines????

 

My local ford dealer is still supplying them if you have any trouble, i'll send you some

 

stu put mine on 071s 2 years ago and its never missed a beat. not the same plugs for 2 years i may add.!! £12 a set and just change them at the same time as i change my oil.

 

Paul your car is one temperamental mofo.....

What happened with that power steering fluid you found under the car in Blackpool by the way?

 

Your telling me i will give you a couple of hundred for it Gracie and then you can come out with us on the boxing night out my friend

 

Ive properly abused Ik22's in the past and been completely unable to kill them even when running 300bhp on nitrous from a standard 2 litre engien using these plugs!

I dont think it will be the plugs.

 

Does the fact i have done over 12000 miles on them without taking them out, checking them, gapping them or looking at them for any reason answer your question?

Not to mention the fact the unburnt fuel at part load measurable in the exhaust almost HALVES on most YB's with the Iridiums fitted?

 

Word!

Still owe him the bucks for them aswell.....D'oh!

 

well, when I asked him.. and mentioned the more fruitier of plugs.. i was told not to bother as the rst ones were more than good enough

I personally would love to junk the rst ones.. brings me out in a rash, just from firing her up!

 

The plugs are used in lots of jap motors without problems (under various guises including HKS)

so i am fairly sure the plugs wont be the problem. Having said that i have not had any experience with them in the sierra though.

 

The 071s are a great plug for the YB but they dont last very long (Relatively speaking) and they arent the best with extremely lean mixtures (Leaner than 15:1) Other than that, fill your boots, great plug and VERY strong indeed.

Remember, when running a wasted spark configuration your plugs last less than half as long as they do with a conventional distributor cap

 

well, I did have a nice set of NGK 9's.. the earlier set!

until the 3rd one melted... along with the contents of the cylinder aswell!

 

Dave, do you want to borrow a hairdrier for getting the piss to dry off your fireworks?
I dont need it now im bald anyway

 

STFU you fat bald c*nt!

 

 

I sell and run Denso's mainly for Jap stuff, but I have had no problems with the Cossy applications.
I use the vk20pr-z11 as should the 4x4 saff's
T34 should run svk20r-z8
2wd saff are ik24
rs500 are ik27
3dr are ik22

With no cat on the car different plugs need to speak to your tuner.
Sometimes it is important to change the heat range when running higher boost etc, i.e. use a colder plug i.e. go from vk20pr-z11 to vk22pr-z11, or from a ik22 to a ik24 etc etc
Escort turbo runs ik24 and tuned ik27.

 

Been on Champion C57 or C59 plugs gapped at 25 thou ever since got the cossie (Circa 2 years ago) and not had a problem at all!

 

I Just got some IK27 ones for the cossie, as Mark said they are the ones! Didnt pay £60 more like $50 lol so will soon see what they are like. But no dought they will be proper if Mark recommended them and also stu says there top