stock 1jz spark plug gap bkr6ep

[chrisrundell69]

just needa know what the plugs need to be gapped at for stock 1jz guys from jza70 supra cheers guys

[chrisrundell69]

.8mm sound about right if im running about 12psi?

[whatthe?]

Yep, .8 is factory spec. I still run that at 20psi with no worries, some recommend .7 at high boost theough..

[beatle]

just get ngk bkr6e's they are already gapped to .8

[chrisrundell69]

cheers guys, putting em back in now hopefully they'll solve my not starting problem

[Draven]

platinums are generally considered a bit of a waste of money on a modded turbo car... better off with coppers and swap them frequently

[Norbie]

Yep if you're running higher than stock boost coppers are the go, platinums tend to foul too easily.

[beatle]

plus a full set of coppers cost the same as 1 platinum

[chrisrundell69]

platinums are generally considered a bit of a waste of money on a modded turbo car... better off with coppers and swap them frequently

yea mate i know they were in my car when i got the engine tho

[Dieseltrain]

ALthough Ive had no issues running Iridiums gapped to 0.75mm at up[ to 20psi so far for 8,000kms...

[Ribfeast]

Never had any issues with my platinums fouling. I run 0.75-0.8mm gap at 18-20psi.

[MR 1JZ]

Never had any issues with my platinums fouling. I run 0.75-0.8mm gap at 18-20psi.

yeah but if you foul them and subsequently fuck them youre gonna be rather pissed aye...

[chris davey]

Probably more to the point is, why is it not starting and what have you changed? Sounds like they could be fouled already?

[chrisrundell69]

all fixed dw massive air leak from stock blow off valve + old black plugs, clean em up and removed blow off valve all good now

[Ribfeast]

Those stock 1JZ BOVs are a bastard, mine would leak all the way up until around 1-2 PSI and eventually seal. Made it a lot slower at building boost.
I ran a piece of hose from the stock BOV's output into the cabin for a laugh once, and went for a drive while watching the boost gauge, you could see it struggling to build boost, and feel air rushing through the BOV's output, before eventually sealing up. When I backed off the throttle it blew the hose clear out of the cabin onto the road lol

Plugged off the stock BOV location and fitted a Turbosmart Dual Port BOV near the throttle body and it has improved things quite a bit.