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At What Modification Point Are The Std Spec Plugs No Good?

TUF250

By TUF250,
in Engines & Forced Induction

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TUF250 Proficient

TUF250

Posted
Posted (edited)

Hi all,

I have bought myself an r33 gts-t manual and have doen all the good service items (new oil in eng diff and box) new coolant, cleaned afm etc

very happy with the car.

I also put in new plugs.

I used the ngk recommended Platinum long lifes. Now my question is that the plugs are a 5 heat rating (as recommended) and a 1.1 gap.

at what modification point will these no longer suit?

The car has a 3inch cat back enhaust, high flow cat and std airbox with a bmc filter and a small scoop to direct air up into the snorkle.

next step is a 3inch dump pipe then eventually a cooler. will probably leave the boost stock.

will these plugs still be sutiabel at that point or will i need a 6 heat rating with a 0.8 gap?

thanks

Edited by TUF250
mad082 Grand Master

mad082

Posted
Posted

if you up the boost at all then i would recommend going to heat range 6 plugs. as for the gap, that really comes down to the strength of the coilpacks. if they are still in good condition then you could get away with the 1.1mm gap.

also next time you get plugs i wouldn't bother getting platinums or iridiums. i'd just go the cheap coppers. doesn't work out to be any more expensive in the long run, just change them every 10 or 15,000kms. in a stock setup you'd probably get nearly 20,000kms out of them.

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