Spark plugs

[ChEsTeR]

What do u guys do with the exhaust plugs when increasing power. OEM plugs are BCPR5E-11 wich are hotter then theintake ones do u change to ones from the intake side or just leave as it is. I just want 200 hp.

[s13eater]

we only have the 4 plug head, but you need 7's in the intake side.

[ChEsTeR]

But what about the exhaus side should i change to 7's also or maybe just leavr 6's

[CNHSS1]

when i had a twin spark 8 plug motor i ran 1 grade colder on both inlet exh, ie 7s on inlet and 6s on exhaust. i only ran about 10psi boost and UK ambient temps are pretty low (very bloody low today!)

[PukkaSilvia]

When you buy them off the shelf the spacing probably wont be correct so check them with feeler gauges.Buy bcpr7es plugs on all 8 plugs spaced to 0.9mm .
These will work easily on a 200hp car

[ChEsTeR]

Thanx man