Hello to everybody, Im very confused about the features of some spark plugs.
I have just moved from stage 2 to stage 3 on my 3door cossy, and Im not really sure about the sparks plugs I have to use to get the best performance of the engine.
I had fitted AGPR12 PP8, but now due to the extra fuel and my driving style ( I dont drive to hard ) one or other spark plug is overfueled and the engine suddenly runs on three cylindres.
I need to change the spark plugs but I dont know which one I have to fit.
I have doubts about:
AGPR 902P
AGPS 071C
DENSO IK31

Some advice please and explanation about the features of each one??

 

i used denso ik22's a while back and they were useless. not impressed. had a chat with the denso rep and worked it out, but still not impressed.

best plugs iv used are NGK BCR8ES

about 2 quid each and faultless

 

any other advice????

 

at this site often i have see an advices about AGPS 071C for st3...

 

Thanks Yura. I was still waiting for an advice

 

MSD & MAD tuners both rate Denso IK31's and 27's

For a 380bhp spec engine was told to use IK31's for trackdays and IK27's for road use.