My thoughts & recommendation
I was tired of changing out my plugs every 9,000kms or so and so also decided to try out a set of platinum plugs since the cost is similar but supposedly last longer than copper...these are my thoughts and first hand experience -
1. They don't perform as well as the copper ones (i.e. slight hesistation at top end leading me to believe they don't spark quite as well). Changed out to copper and went for a run and car much smoother / pulls stronger to redline.
2. They don't last any longer than the copper ones
3. Given the above paying a little extra doesn't make sense
4. Best to stick with copper units and change regularly
5. If you RX is slightly modded best to go with copper 8 and 9 heat range.
6. The higher the number the colder the plug i.e. retains less combustion heat so lasts longer.:shades_smile:
7. HKS or similar aftermarket plugs IMO suck especially the 10 & 11s for street use as they always foul causing flooding of engine = real pain to un-flood engine / very embarrassing in the workshop or worse still on the side of the road 8-(
By the way my RX was running 0.95bar boost with standard 2000 twin-turbos and oem fuel pump with direct cable and downpipe and HKS twin intakes.
Hope this helps all those pondering over which plugs to get and hence losing sleep over it...hehehe:confused_smile:
aspec_fc said:
Good news. I got mine for RM608 for 2 sets of platinum NGKs. BUR7EQP and BUR9EQP. Notice the 'P' at the end of the code. Platinum is not exactly a performance upgrade. But they last twice the lifetime of the standard copper. I thought is reasonable since copper are almost RM300.
Now that I don't need the extra set, would anyone be interested in getting it for RM304? they are good for both FC and FD. else i'll keep it till next year.
