| Author | Message | ||
     Elyaswolffxb9s |
Ok, so my XB9 takes a DCPR8E and I want to run a better plug (not the pro series 'split fires'). The closest plug NGK makes is a DPR8EIX-9 which is a iridium plug. The way I understand it is that the "c" means it uses a different size plug wrench, and the -9 means that the gap is 9mm (.036) instead of the 10mm (.040) gap that the regular plug takes. So is this plug safe to use, seeing how it is the same heat range and a resistor type as stock? But higher quality than stock (and iridium) | ||
| Spatten1 |
I'm running them, but I gapped a tight .040, because I didn't know any better. The are running fine, but I didn't expect any extra performance. No fouling problems yet, which is why I switched, of course when it drops to 30 degrees I'll know if it fixed the problem. | ||
| Johnk3 |
i bolted them in and they work fine. i figured i'd have fouled them considering how rich i was running. | ||
| Fullpower |
are you interchanging the concept of "quality" with the more easily measured parameter of purchase price? | ||
| Trojan |
You really need to be running the DPR9EIX-9 and not the DPR8. You'll find that this is a better match for the 10R12 heat range and will not foul. | ||
| M1combat |
Do a search for "Master" for the last couple months and you'll find a Master Cross Reference list for plugs that I posted a while back... a 282 page plug cross reference spreadsheet  . The DCPR9 and IXU24 are what I'd recommend... | ||
| Elyaswolffxb9s |
Great, thanks guys. So what do you gap them at? Or is it true that you cannot re-gap fine wire iridium plugs? | ||
| M1combat |
I re-gapped my IXU24's to 40... I think it probably depends on how you stretch the gap. | ||
| Gowindward |
I have gapped the NGK's but the inner electrode does seem to be a bit fragile. I have broken the tip of the electrode off a couple of times. I figure the plug is trash after that.  I have gapped them at .035" | ||
| Fullpower |
M1 are the IXU24 a 5/8 hex size? | ||
| Xbolt12 |
"I have gapped the NGK's but the inner electrode does seem to be a bit fragile. I have broken the tip of the electrode off a couple of times. I figure the plug is trash after that. I have gapped them at .035" DCPR9EIX in the US. NGK warns you about using a spiral type gapper, as it will damage or break the electrode tip which is very fine. You are supposed to use the type of gapper that has a cut which hooks around the ground electrode at the bend and does not contact the center electrode at all. BTW my plugs did not come with the correct gap and I had to set them (I think recomended is .040). NAPA has the gapper, as do many auto parts stores (it is the old school kind of gapping tool). | ||
| Xbolt12 |
I forgot to add the gapping tool has wire feeler gauges on the opposite end for measuring the gap, and you must be VERY careful when measuring not to force the wire through at all or you will damage the center electrode (tip). Gently is the word. |
