Spark Plug Gap And Other Info

[govich]

Hi guys,

I'm just wondering what the spark plug gap for a stock RB25DET should be? I've been getting misfiring on the last few nights and have been thinking it's the coils (they look alright but not perfect) but the spark plugs are pretty worn and are gapped at close to 1.5mm (i only got this car a week ago - so it wasn't me). from what i've been reading it should be 1.1mm. Is this right? I'm hoping a new set of plugs gapped at the proper amount should fix my problem.

edit: just found a lot of info on google that i couldn't find before (looking for 2hrs):

Cylinder arrangement - DOHC 6 cylinder in-line

Bore x Stroke mm (in) - 86.0 x 71.7 (3.386 x 2.823)

Displacement - cm3 (cu in) - 2,498 (152.43)

Firing order - 1-5-3-6-2-4

Idling speed M/T rpm - 650

Ignition timing (BTDC) M/T degrees - 15

Spark plugs [NGK] - Hot PFR5G-11, Standard PFR6G-11, Cold PFR7G-11

Spark plug gap mm (in) - 1.0 to 1.1 (0.039 to 0.043)

Camshaft operation - Timing belt VVTC

Power kW (hp) / rpm - 184 (250) / 6400

Torque Nm / rpm - 294 / 4800

Compression - 9.0 to 1

Induction - Turbocharged

hope this helps others like me

Edited May 28, 2006 by govich

[R33S2]

http://www.skylinesaustralia.com/forums/in...opic=104405&hl=

Have a read through this thread it should help you out.

[govich]

http://www.skylinesaustralia.com/forums/in...opic=104405&hl=

Have a read through this thread it should help you out.

thanks heaps. i wish searching was easier on here

oh and one more question

everyone in that thread is saying the NGK part number is BCPR6ES-11 while their website says PFR5G-11

i assume the difference is platinum vs copper?

Edited May 28, 2006 by govich

[Craved]

yes, coppers are the BCPR6ES-11

personally if i were you given the age of these cars, run it at 0.8gap to save any hassles.. run fine like that..

NGK etc are recommending the iridium or platinums in there books now too (for parts shops etc) so never mind them

[ICER33]

yep 0.8mm is the way to go when boosted

i had the same problem at 1.1mm, gapped them down adn now runs fine at 0.8mm

[Busky2k]

Yep 1.1mm is N/A spec for most vehicles.