Thats the 2nd set of ik31's fucked in under a year,do i go back to 071's or any other recommendations ?

 

Fuck me Kev, was told they are the nuts mate... was gonna get a set... not now!!

Champion C57 or 59's do us pretty proud

 

P.s you northern fooker

 

denso s in mine , never a problem, but my mates cos eats plugs all the time , why ? if i change mine , i m goin back to the motorcrafts £12 ones

 

They are if you are sold the correct heat range.

Mark

 

I was told that too Have just ordered some 071's to try .

Southern poooooooooooooof

 

well I know alot of people DONT like them but I run Champion c59c in mine which is just under 400 bhp with NO PROBLEMS at all and c57c in the 3dr that's over 400 again with NO PROBLEMS!

 

What would you advise mark ?

 

IK27

Mark

 

Best put our flame suits on mate. I know they do have their problems, but never had a misfire due to one other than at idle

 

I was advised IK31 by a tuner the other week

Is there a guide with the temp ranges Mark?

 

Yes my giude 24 up to 360hp, 27 from 340 to 630hp. 31 550hp to 1000hp+.

Mark

 

Out of interest Mark, why has Kev had 2 set of 31's go if they're recommended for the higher hp engines?

 

When running such cold plugs you need to make sure the engine is not to rich and floods its plug,
If you keep starting the engine and not warming the plugs you will kill them, I recomend when doing this is to hold the revs to 2.5k until the engine clears itself after 30sec then they are normaly fine to starting the car,
If misfiring under boost you will need to close the gaps to the correct range for your coil system,
Running 31's as such low power is IMO not the correct way to run this plug.

Mark

 

Thanks m8,i've been doing a lot of short journeys lately could it be that thats done it ?

 

What goes wrong with them.

Mark

 

Weak spark a very dull orange colour spark

 

But what problem do you have with running.

Mark

 

Missfire at idle and part throttle then all the time afte a short while

 

To cold plugs causes this.

Mark

 

Sorted Kev

 

Gonna order a set of ik27's and try them thanks very much for your help mark.

 

Schwing.

 

i have used NGK bk9iex iridium plugs for over 3 years now (400bhp) and never missed a beat.....i'm only just on my second set as i fooked one checking the plug gap...............less than £30 delivered

 

Stuck a used set of 071's in this morning till my ik27's arrive and she purrs like a kitten again.

 

how much are the ik27's and where from

 

071'c never used owt else never had a problem and i always carry a spare set in the car

 

I've been using IK27 for years now, never a problem, had the same with 31's fouling under constant city work, so just put in hotter running plug, the 27's, does city stuff fine now.
tabetha

 

Opie oils delivered for £40

 

ngk bcr8es are spot on ive always ran them,work pefect kev and only around a £10 for 4

i had those £50 ones woodford sell and the car misfired

 

This is because they are the ONLY plug for a YB cosworth.