spark plugs

rhetto · Posted: Fri Dec 03, 2010 9:29 pm Post subject: spark plugs

Spark plugs - good & bad types for Supra. How to read them?
Platinum tipped plugs are a no-no, as they retain too much heat which in turn can cause detonation. I’ve used both Champion & NGK copper plugs in mine (part numbers ???) & the car’s been fine.

If you are running higher boost then stock drop down one heat range in the plugs and two heat ranges if running around 20psi or more. Also the gap should be closer at around 0.7-0.8mm to further reduce misfiring. Most misfiring at high boost is due to plugs and these should be the first item checked if you have misfiring problems.
is this true Confused

Woggin · Posted: Sat Dec 04, 2010 4:17 am Post subject:

2nd statement sounds right, not sure bout the first though, retaining too much heat and causing detonation??
_________________

JZS147 CLUB STICKERS
http://www.jzs147.com.au/forum/viewtopic.php?t=13060

JZS147 stock snails 12.58@115, T04Z is here, still in beta!
92 r32 gtst daily

Old rides: 04 zze123r, 98 ae111r, 92 ep82gt, 92 sw20r, 00 ncp10r, 91 uzz31, 84 Ma61, 88 gz20, 90 jza70, 90 jza70 aerotop

Roadside Tech · Posted: Sat Dec 04, 2010 4:24 am Post subject:

The first one is bollocks, Toyota put Platinums in as standard on the MK4!

Second one is roughly correct.
_________________

www.singletech.co.uk - Home of the Big power Aristo

rhetto · Posted: Sat Dec 04, 2010 10:24 am Post subject:

thanks guys,i found it on the supra forum,i run platiems and run 18psi and had no promblems and i read this and paniced.what plugs should i run

Woggin · Posted: Sat Dec 04, 2010 10:23 pm Post subject:

NICK 05 · Posted: Sun Jan 09, 2011 7:19 pm Post subject: