| Author | Message | ||
     Electraglider_1997 |
I was trying to find info on Pulstar plugs and found this very informative site. The torque numbers are very good and stable in comparison to others. http://www.sparkplugs.com/sparkplug411.asp?kw=SRT-4+Dyno+Results&mfid=0 Iridium gapping instructions. Which I wouldn't have known. http://www.sparkplugs.com/faqmain.asp?mfid=0  | ||
| Arcticktm |
The differences in the average are outweighed by the deviation between runs. This seems to say that other factors were far more significant than the different spark plugs tested. I am sure Iridium plug makers would disagree, and I admit I have bought them in the past. I am not good enough to sense this <1% improvement, even if true. My attraction to them is the resistance to fouling, since changing plugs is quite chore in most modern vehicles. Interesting on the gapping comments in saying most of us are not capable of doing it right! Wondering why they say not to touch the center electrode when increasing a gap? I find nearly all the proper plugs are close enough to OE gap anyway, that I rarely have to adjust much. When I do, though, I use the old fashioned type gauge that DOES touch the center electrode. I lost my other one years ago, and never thought much about the difference. | ||
| Ullygan |
what about the 'Buell® Pro-Series Performance Spark Plug'... are they any better? | ||
| Teeps |
Arcticktm Posted on Wednesday, April 22, 2009 - Wondering why they say not to touch the center electrode when increasing a gap? If enough pressure is applied to the wire it can bend and/or break the porcelain. | ||
| Thunderbox |
I guess those results are meaningful for the SRT4. But show us some results on the Buell. There is so little difference I am indifferent lol | ||
| Scooter808484 |
I'm guessing, but not willing to do run the data, that the difference is statistically insignificant. As someone else said, the difference between runs on the same plug are more than the reported different averages. The difference is within the experimental error. If it sparks, it should light the fire, and that is all that is required. I would perhaps expect more difference from indexing, in that starting the flame front moving a particular direction might be an advantage. Longevity, resistance to fouling, etc. might all be reasons for one type of plug over another. It would take better data than this to make me believe there's any power difference. | ||
| Ourdee |
Wondering why they say not to touch the center electrode when increasing a gap? If you use the center electrode to help pry the gap open, the tip will break off. At that point it is no longer an iridium plug. And that is the wrong way to adjust gap anyway. Thus this quote->Interesting on the gapping comments in saying most of us are not capable of doing it right! rd} | ||
| Oldnotbold |
Well, I just did the 10,000 mile on my Uly and changed to the iridium NGK's. I have never had a fouling problem, but boy what a difference. I first noticed that it is MUCH smother at low speed pulling and that the idle is much smoother. Dennis | ||
| Crusty |
Is it smoother running because it's an Iridium plug, or because they're new plugs? Would putting new OEM plugs in have the same effect? | ||
| Ratbuell |
SRT4 = BOOST. Boosted motors run TOTALLY differently than atmospheric motors. Trust me, I own five. +1 to the above - show me the difference on a Buell motor. ...one of these days, I'll figure out why people have to prove to everyone else they can do it 'better' than the factory.... | ||
| Thetable |
Too many variable, too few runs, and way too small a sample size. I'm willing to bet on an SRT4 I could get bigger differences than that just indexing the plugs or resetting the ECM. And the SRT4 running the stock ECM runs pig rich, great for fouling plugs, especially during short dyno runs. From what I was told, mine ran so rich on track I had flames from the exhaust. | ||
| Oldnotbold |
I don't know for sure, but the difference was significant. | ||
| Tag88 |
Thanks electraglider 1997 was wondering about the gap | ||
| Ullygan |
I have been running Pulstar for six months.At first I thought they were great, seemed to be more umph over the stock plugs. I just pulled them a few days ago to check them and they were smoked out big time. Loads of black soot on both. More on the front one though. I put in some autolites ( cheapos ) and what a difference in power. So I have an 08 uly and have done the TPS reset sequence, but isn't it running rich when the plugs are smoking so bad? | ||
| Arcticktm |
Ok, so Ourdee is obviously tons smarter than dumb old me. Or, they could just tell you on the plug box that iridium plugs are more brittle than conventional, and you must gap them a certain way. A little information goes a long way, and I am capable of reading, believe it or not. Never had a problem with a plug gap or tip yet, but I haven't used a lot of iridium plugs, either. BTW, I also saw much improved and smoother low end after plug change. I put in new NGK's (not the iridium's), BUT I also switched to the '07 airbox cover at the same time, so no telling what each did on their own. My old plugs were stock, with about 9,800 miles, and looked to be in decent shape, but getting a bit worn electrodes. | ||
| Ourdee |
Ok, so Ourdee is obviously tons smarter than dumb old me. You are the engineer not me. I read where someone else on here posted about breaking one. I agree, info on the box would be good. I re-read my previous post and it does come off like I was being an arse. I apologize. Sorry. |
