What spark Plugs???

[cjsewell]

Hey all, as you may have read elsewhere in this forum I have just bolted a turbo into my GTS, all thou I have had some problem only one remains. When the revs and boost get up (4000+RPM or 6+PSI) it starts to mis, I was told by a "friend" that I need different spark plugs as the non turbo runs hotter plugs . . . or something to that effect, so basically should I change my plugs or just there gap, what sparkplugs/gap do you recommend for a RB20DE with a turbo? Cheers

[Zensoku]

I have no idea what other mods you have done to support this turbo conversion you have done to your RB20DE, but i had an acquintance a long time ago that toyed with the idea of adding a turbo to his NA RB30E VL Commondore. I warned him about using the factory management and the higher compression ratios of the NA motors compared to the turbo motors. The result? An engine which although went alot harder than NA, suffered from detonation BADLY (depending on the available traction and load put onto the motor of course) This ended in a %$ed piston ring land, in (GUESS!!) cylinder number 6. The case of the leaned out and detonating engine strikes again...

To answer your question, i will look into what NGK part number is recommended for both RB20DE and RB20DET at where i work tomorrow, if i remember.

But this mightn't be you problem...

I'd be hooking up an A/F ratio gauge to check the mixtures...

[BOOSTD]

gap your plugs to .8 or .7mm firstly

[JH32]

Dude I just bought new plugs for my RB20DET

They're already gapped to 0.8mm

Part no is BCP6E, and they're made by NGK

Got them from Coventry's and they're pretty cheap

There ya go!

[Anquetil]

If you get Platinums, which come in 1.1's or .06 I think?

How do accurately gap them down?

If your using sandpaper doesn't that rub the special coating that is on the platinums?

[R31Nismoid]

with a gapping tool.

that's how

[Zensoku]

Sandpaper? :eek: -

RB20DET & RB20DE 1989-91

Copper: BCPR5ES-11

Platinum: PFR5A-11

Iridium: BCPR5EIX-11

RB20DET & RB20DE 1991-1993

Copper : BCPR6ES-11

Platinum: PFR6A-11

Iridium: BCPR6EIX-11

Drop the -11 off the part numbers to get a 0.8mm gap out of the packet. And do not attempt to gap iridiums.. You have been warned.

Hope that helps.

[YBSLO4]

Go Deson iridium's... problem solved, without a doubt best jap plug around

[Busky2k]

Get an NGK BKR7E. Gap it to about 0.8mm

[Zensoku]

agh, a colder heat range and a recessed electrode, you must know your plugs too...

Generally a colder plug changes the thermal effeciency of the combustion, hence slightly more power (preventing the problem of pre-ignition or detonation when tuned properly of course)

Recessed tip? There is alot of debate in Japanese tuning circles on these. I won't comment, as i haven't seen any advantages of using these in skylines versus the standard type.

BKR7E won't need gapping to 0.8mm because they are that gap, out of the box.