R34 Gtr - Spark Plug Recommendations

[fly510]

here's the deal. I have a reasonably standard but freshly rebuilt 34 gtr.

Haltech, -9's, adjustable cam wheels and looking for about 250awkw. What plugs should I be going for and from where?

[breaker1845]

Just buy NGK copper plugs from your local auto store/s. Depending on boost levels you may want to run 6 or 7 for your heat range. Usually the plugs come 1.1mm gap, simply gap them down to 0.8mm and put them in.

May as well check your coil packs and ignition leads at the same time to prevent issues during tuning or down the track.

I can tell you right now that you should definitely be pulling more power closer to 300kw if you are using factory injectors/pump (at their limits). Running the 9's at low boost you'll get increased lag, assuming you are chasing response you might want to consider your fuel system options to prevent that. Obviously factory clutch might become an issue possibly unless you put a better one in with the motor out and other issues arise.

Final question, what made you rebuild your rb26 with standard components and not aim for stronger internals or head work?

[fly510]

Cheers for the reply. I was in a bit of a rush with the initial post as the donk is not completely standard. to be honest 300 is the aim I was just being conservative.

it has Forged pistons, upgraded rods, oil restrictor, sump baffle, tomei metal gaskets. its not over the top but should do 300awkw pretty easliy. My goal with the -9's is to run about 20/21 psi as the haltech will do that by default

The clutch has also been sorted. its new and not stock.

[breaker1845]

Sounds good and perfect for 300kw, nice figure and I am aiming for around 330kw at 20/21psi with my setup once complete. I am also using hks gt-ss's which are -9 equivalent.

But yeah make sure the fuel system and ignition is sorted correctly and you should get good results with the setup you have.

Stock camshafts will still be good but if you put in adjustable cam gears you might of done some camshafts at the same time to give you that increase.

With regards to plugs, there are two types you might need to try to find what works best for you. Consult your engine builder/tuner to see what he might suggest but it is a matter of trial and error really. But if you have new ignition components then you probably won't see any issues.

[fly510]

I just installed brand new spilt fire coils last week so I should be good there. Fuel pump may need attention though before a power tune.

Thanks again