| Author | Message | ||
     Chas1969 |
Hello all I was curious if anyone has ever tried non-projected (stock are projected) like most race plugs?? So that the tip is at the level of thread end. Why I ask is Denso has cooler plugs than "9" NGK which is 31 in denso heat range, but it is flush or non-projected tip. Their is some evidence to support cooler plugs help with pinging and non-projected to help with pinging also. Thanks for any first hand accounts. Chas | ||
| Djkaplan |
Never even seen them for 4-stroke applications, just 2-strokes. These plugs really should be used where they are necessary. You can go plenty cold without resorting to non projected plugs. What advantage do you peceive these plugs giving you? | ||
| Chas1969 |
My old BMW had non-projected plugs but some engines have and some don't. With the F650GS projected plugs helped some bikes with stall/surging. This is only a hypothetical in non-projected plugs ... "help ping" category but it might help to have cooler plugs and electrode lower in the roof of combution chamber. Chas | ||
| Diablobrian |
Non-projected plugs are designed for special applications. I would not recommend using them in your Buell. I believe that the idea is to expose as much of the kernel of lame as possible to the fuel air mixture. The non-projected plugs do shield the spark a bit since the spark occurs at and below the surface of the plug base opening. This can lead to incomplete or improper ignition of of the fuel and air in the cylinder. IIRC the non-projected plugs are designed for use in combustion chambers that get VERY hot. They are made that way because exposed electrodes melt off. The engineers at Buell spent a lot of time choosing the proper plug design for your Buell despite the ad copy no plug by itself will turn your Buell into a Gixxer eater. There can be small gains made by tailoring your heat range slightly and going with a more fouling resistant electrode material (platinum or iridium come to mind) but that's about it. | ||
| Djkaplan |
"There can be small gains made by tailoring your heat range slightly and going with a more fouling resistant electrode material (platinum or iridium come to mind) but that's about it." A very astute statement. I concur. | ||
| Cataract2 |
As for pinging. Might just be your timing is off a hair. | ||
| Chas1969 |
The worst I think of will be fouling of plug and or less than optimal ignition. Chas | ||
| Trojan |
I tried Brisk LGS surface discharge spark plugs in our race bike lastyear for a while, but found that they gave no better performance than our normal NGK DPR9EIX9 iridium plugs despite costing around 4 times more per plug. Lots of claims are made for these plugs but I found no benefit. You can see more at www.briskusa.com | ||
| Sparky |
The Brisk surface conductance spark plugs look like an adaptation of the patented Torque Master plugs which is a good thing, IMHO. One claim they (TM) make is they are more resistant to fouling because deposits that would form on the insulator become spark conductors and get burned off. On a race bike where the fuel mixture is closely monitored, this is probably not a concern, but on a street bike, especially XBs with limited access to the plugs, a self-cleaning spark plug has real advantages. Also since the spark doesn't erode the ground electrode at one point, they last much longer than regular plugs. Again, not a concern for a race bike, but a worthy consideration for the rest of us. FWIW, I'm still running the same set of TMs in a XB9R approaching 50k miles and it's running strong. | ||
| Sloppy |
I tried Torque Masters and had them dyno'd and compared gas mileage to regular plugs. There was no difference in performance -- except in my lighter wallet  . I'd recommend sticking with normal plugs -- I like NGK myself. Their electrode seems to stay sharper, longer. Due to the Torque Master design it's hard to tell how much wear you are getting as you can't clearly see the elctrode on it's side. YMMV... |
