Copper spark plugs to suit TT part number

Hi guys I'm after the part number that suits TT for non platinum copper tipped spark plugs. Did a search and couldn't confirm correct plug numbers

 

I use NGK ZFR7F-11 for tuning.......

after that I throw Iridiums back in for the road.

 

i lost noticable 'by the seat of my pants' power going from irridiums to copper, put irridiums back in and power came back, revved better too.
That was on 16 psi with a tune

 

Heregago http://www.aus300zx.com/forum/showthread.php?p=1052837#poststop

 

BCPR6ES

gap should be set at 0.8 for a TT

 

I use BKR6E plugs... NGK brand...

 

i use BKR6ES-11 gapped to 0.7mm works a treat

before anyone says anything. you cant buy a brk6es plug... weird !!! only the -11

 

The BKR are a better plug to use in a highly boosted engine than the BCPR because they are a non projected tip plug. This means they are less prone to causing detonation by a hot spot on the electrode.

However running BCPR in an engine with moderate ammounts of boost will give better medium load drivability because they are not as shrouded in the combustion chamber.

 

Thanks for all the info guys, put the new plugs in yesterday and shes a bit more responsive as old plugs had a bit of carbon on them. Ended up using the BCPR6ES gapped at .75.