Spark Plugs

[donkeypunch]

hey there,

just taken out my NGK BKR7E that have been gapped to.5, my mechanic has ordred me bosch plugs to replace them. what should i gap them too?

RB26 about 500hp, 18lbs boost, read that the bosch plugs arent that good?

cheers robbie

[gotRICE?]

probly should have asked before ordering!

[donkeypunch]

yeah my mechanic orderd them, should i bin them and grab the NGK's?

[blow thru]

hey there,

just taken out my NGK BKR7E that have been gapped to.5, my mechanic has ordred me bosch plugs to replace them. what should i gap them too?

RB26 about 500hp, 18lbs boost, read that the bosch plugs arent that good?

cheers robbie

NGK all the way, i use r5671A-8 which is a not protruded plug.My rb20 makes 299rwkw on 1.5bar(20lbs)i keep the gap they come out of the box .8mm an no problems. Ialso used the same plugs in my hk ute with a blown 400 sbc an that made 727rwhp.On the part number for the plugs r5671a-8 the -8 is the heat range

[bubba]

NGK BCP6ES-11's gapped down to 0.8mm if needed.

[SuperElectric]

Don't get bosch.. they are not good spark plugs for the RB26.

i have NGK BCPR7ES which come standard set to 0.8. leave them at that and the car will run great.

Edited February 27, 2009 by SuperElectric

[donkeypunch]

my mechanic who built the car said to gap them to .5 just because i dont have ubgraded coils etc

[bubba]

Unless you have misfiring issues already, then there is not really any need to gap down to 0.5mm.

Many of us are still running stock coils fine (and some are making a fair bit of power with them).

[donkeypunch]

will the larger gap help performance?

[gotRICE?]

will the larger gap help performance?

It doesnt "help". The smaller gap conpensates for a weaker coil.