Outer Limits 4x4 Board

G day guy's and girls, have a patrol with a rb30turbo in it, running straight gas (no injection) ,9mm ice ignition leads, ice ignition coil (one of the best he does) re curved and retarded dizzy (professionally done) now every service we have to change the spark plugs, due to the fact it starts missing.

what could be causing this?

we are going to try split fire spark plugs soon (recommended) but still unsure!

cheers Adam

Have you been gapping the plugs before installing them?

What brand and model plug are you using?

Throw up a pic of one of the tips for us too!

Joel @ PGS would be the guru here - no doubt he can tell you what plug and gap (if applicable) to run.

Pre Detonation normally kills plugs.

Assassin_Offroad wrote:Pre Detonation normally kills plugs.

No predetination! just been fully tuned by a well known gas research tuner

bcp7es is what were running.... necked down to .8mm

and there not burning out thats the thing

Wrong heat range?

tna racing wrote:

Assassin_Offroad wrote:Pre Detonation normally kills plugs.

No predetination! just been fully tuned by a well known gas research tuner

bcp7es is what were running.... necked down to .8mm

and there not burning out thats the thing

I'd give these a shot:
http://kalecoauto.com/index.php?main_pa ... ducts_id=5

All the other stuff i've bought from them has been awesome. I fitted some of these to my patrol last week and it fixed the miss it had:
http://kalecoauto.com/index.php?main_pa ... ucts_id=15

GUtripper wrote:Wrong heat range?

trying a cooler one, hoping it works, but have tried a few

woops on dads account

tna racing wrote:No predetination! just been fully tuned by a well known gas research tuner

Try someone else, see if there is a change.

Im finally getting off my ass and getting my rb30 turbo, just running factory vl turbo with straight gas through a 225 mixer and b2 converter at 6psi, we shal soon see how it goes, i belive il need to run new plugs after that

bogged wrote:

tna racing wrote:No predetination! just been fully tuned by a well known gas research tuner

Try someone else, see if there is a change.

good gas research tuners are hard to come buy......

tna racing wrote:

Assassin_Offroad wrote:Pre Detonation normally kills plugs.

No predetination! just been fully tuned by a well known gas research tuner

So they have had a probe in the water jacket to measure with detonation sensor then ?

Detonation happens 5-7 deg before you can actually hear it.

If they were the wrong heat range, they normally crack the porcelain around the electrode as well, which can cause the misfire.

What sort of air intake temps are you seeing post intercooler ?

Try bcpr not bcp resistor type before spending heaps on split fire plugs. R meaning resistor