My stage 3 saff has melted the tip of a denso ik31,been advised there is some detonation going on, could somebody tell me what I need to start changing/checking? Car was set up at msd about 6 months ago,cant really afford to go back over there as have just bought a house. Does anybody know of a reputable tuner in north yorkshire I can take it to have a look? Cheers

 

Was it number 4 plug tip out of interest?

 

No mate it was number 2!

 

Ahh - no more curiosity from me. Whip out the rest of your plugs and check the condition of them too

 

Faulty injector possibly, causing it to run lean in that cylinder?

 

You're lucky it just melted the plug and didnt wipe out the lot like mine did

 

lots of probable causes,

are you using happy shopper fuel?

 

If it was me i'd head back to MSD and they're 300odd miles away from me.

 

think u'd have been better off with ik27's to go with that power......ik31 arn't in the correct heat range.....

 

forgot to say has it done any other damage...??....cos when mine did the same thing it melted the piston and the tip scored the pot..........cost me a rebuild.....so hopefully u've been lucky

 

Not using happy shopper fuel,only optimax. Msd are a fair way from me too, but if I was going to have to travel far I would try Mark Shead this time. Pete, yes I believe they are the wrong plug for this spec, wish i'd have known at the time of purchasing. There doesn't seem to be any more damage done.... not sure where to go from here on

 

the nearest motor factors for the right plugs

 

IK31 are ok in a stage 3, just they will foul easier than the hotter running IK27, normally fine unless around town all day long, they can start moaning.
tabetha

 

Another thing that happens with the car, is when the car is on overrun going down a hill or incline etc, when you step back on the accelerator the car will missfire for a bit. It did this the other day, when I took the plugs out, plug number 2 (the one that has melted the tip) was covered in oil and had quite a bit of carbon build up. could this have something to do with the tip melting? I've put a set of 071's in that I had spare, and im just driving the car steady, trying not to put it under load or bring it onto boost etc

 

Get a leak down done and the bore checked with a scope.

Mark