Spark Plugs

[Kinks]

^^ the spark plugs didn't fix the problem, they just hid the symptom. the real problem is the coil packs getting tired, running a 0.8mm gap is a band-aid for this. but hey, it works. I ran 0.8mm gap in my R31 for ages

[Hardman69]

Mine was fine with just a 3.75" catback 'zorst, then had spark breakdown @9psi with FMIC and stock ECU. I re-gapped a set of V-Grooves to 0.8mm, put 'em in and . . . . . . STILL breaking spark! (not as badly though). Simon at Nizpro said that's V.Common for the R33 GTS-T, and . . . . A PowerFC and Tune fixed the hell out of it. The Factory ECU goes V.Rich above stock boost, makes a heavy mixture to push spark through.

I put a higher flowing Turbo on, went to pump the boost . . . . Spark Breakdown ! ! couldn't get past 10psi . . .

I did the high-temp silicone trick, and now it'll push through a 12.3:1 Mixture at up to 18psi, with 0.8mm gapped iridiums. I think the V-Grooves were a frag better, going back there once the iridiums are done.

The moral of My story? If you've got weak/leaking factory coils - You CAN chase your tail around, and Dodgey-fix your way through to running decent boost & power, BUT it's a VERY fine line you've gotta walk, between spark gap, boost, and mixture.

I'd LUUURRRRVVE a set of Splitfires, but I'm getting by on $11 of silicone for the moment, and I just don't have the cash. I have . . . . $6, not $600. (I LITERALLY have $6!!)

[Cubes]

lol good to see the silicon trick is working well. Well enough to give you a little time to get some $$ together.

[Hardman69]

lol good to see the silicon trick is working well. Well enough to give you a little time to get some $$ together.

Yeah, EggZackery ! ! As much as I'm a tightass, I'd lurrrvvv a set of splitfires in there, so I can get back around a 1mm gap, and punch out a heartier low-midrange wad of Torque (and Turbo spool-up). One of the coils has started "popping" & breaking-down at 18psi though, so I'll have to see which one's peeled the silicon off a bit (I'm guessing it's that).

Oh, The V-Grooves I had so much joy from were NGK R series, BKR6E - They're like, $3 each or something !

[Rolls]

Some more info on the famous misfire problem. If you have a stock motor and have just slapped an exhaust/pod/upped the boost to 12psi with stock ecu, then they can run very very rich. Mine was getting down to 9:1, had to gap the plugs to .6 WITH splitfire coils for it to not miss. Even still in cold weather it would miss. Got a remap (12:1) and I can run 1.1 all day everyday. Often a combination of shagged coils/bad tune will cause the misfire.