Philturbo1

hi all just wanted to know which plugs to go with really. i have 97 uk turbo 2000 wagon only mod done is exhaust any advice will be great thanks guys. phil

EngineMapper @ Group B Motorsport

Standard plugs is the answer really. NGK PFR6b, if you intend on modding it a lot more and getting another ECU etc then perhaps PFR7b, but I'd be using standards for now.

Hope this helps,

Graham

Philturbo1

thanks mate do i have to gap them at all

99greenwagon

iTrader: (39)

yes....dont take it for granted that they are gapped correctly,always check.

Philturbo1

where can i get the tool to do it what do i need to gap them to.

Philturbo1

any body know what the correct gap is for standard plugs

joz8968

iTrader: (13)

Subaru's stated gap is, IIRC, 0.8mm. But you don't want the boost blowing spark out, so I'd try 0.7mm.

FTR, most modded cars (using the PFR7B plug), are gapped to 0.6-0.65mm - so at 0.7mm you should be okay....


You need a feeler gauge's correct sized blade to gap the electrode gap. Move the outer electrode in or out by very carefully using the force of a short screwdriver. The gap is correct when the blade moves around in the gap, but so there's a slight frictional drag too. If the blade is hard to move, then the electrode needs to be opened out a smidgen.

Some feelers might be in "thou" (thousandths of an inch) only, in which case:-

0.80mm = 0.031" = 31thou
0.70mm = 0.028" = 28thou
0.65mm = 0.026" = 26thou
0.60mm = 0.024" = 24thou

Philturbo1

thanks for the info really really usefull. next question lol how do i get to them cos they are in a tight space do you go underneath?

joz8968

iTrader: (13)

It's a pain.

If you search "spark plug removal" | "spark removal" | "plug removal", then I'm sure you'll get the info you need...