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"The miss fire was still there and Tim quickly diagnosed He explained that the Dyna S is very susceptible to damage if the rotor and pickups touch as ours had done earlier this year." http://www.thefang.co.uk/news2013.html
Every connection is soldered, tach installed (works great) , new mini 15 am fuse holder, gapped the plugs to .035", removed on off switch. Seems to have gone away rev'd it to 9k and held it there no blip. Installed the 16/33 sprocket combo. Need to run another ground wire to the dyna plate. Time for another run.
FYI she starts no problem 75mph 4th gear with the 17/33 gearing but gearing won't work for COTA, had no tach on this run so was conservative needs more advance... http://youtu.be/YEhZvB2G8cs
Usually a quick check of the plug electrodes will show if it's getting too hot. Best way is on the dyno - do a timing swing. ie start at say 35 degrees and run it, then 40 then 45 then 50 - if it didn't already peak before then and then back it off slightly. Every motor is different but don't be surprised if it like 40-45 degrees of advance and maybe even more.
Is a little reistance between the coil and spark a good thing? I thought a little suppression lenghtened the time the spark arced getting a more consistent burn. But this may be wrong
Tex, get a pack of crimp on plug caps from somewhere like Moroso - Summit etc. Carbon leads should not have screw in caps. The screw cuts teh carbon filaments.
Tex, get a pack of crimp on plug caps from somewhere like Moroso - Summit etc. Carbon leads should not have screw in caps. The screw cuts teh carbon filaments.
OK well we may have found a gremlin...I had the screw type plugs in the Taylors also and they were suppression core. Double whammy. Now those megaphones will show you all your mistakes won't they? I have the correct crimp plug caps for the msd but was trying to think (overthink) why the NGK iridium plugs are shipped without the screw caps. Now don't laugh or shake your head in disgust but you can wrap a significant amount of the spiral core around the screw...expensive lesson learned. Crazypj was right.
Is a little reistance between the coil and spark a good thing? I thought a little suppression lenghtened the time the spark arced getting a more consistent burn. But this may be wrong
You are right! I fell prey to marketing BS. Where we have a problem is double suppression. The iridium plugs have a resistor and the plug wires also were suppressing the spark. They say the best is copper core (little resistance) with no suppression caps but that is what caused that annoying interference I had in my radio as a kid when my neighbor would fire up his race rm125. Now that would really hack off my neighbors but I wouldn't mind running them to interfere with the annoying Female Spanish Preacher Lady with the PA system at my neighbors house on the next street. What is louder then megaphones at 10k? Yep the annoying Spanish Preacher lady wins...ask me how I know?
Called NGK tech support and they said the DR8eix doesn't come with a screw on cap because they have had misfires and failures with high vibration. They have no alternative in a non removable cap for our size. So we are back to copper core with nonresistor screw in plug caps if want to use the iridiums. Well that was the long road less traveled.
Is a little reistance between the coil and spark a good thing? I thought a little suppression lenghtened the time the spark arced getting a more consistent burn. But this may be wrong
Is there any way to get a better connection between the cap and lead ( assuming you go back to copper core)? Dipping the tip of the lead in solder so there's a better seat for the screw?
Is there any way to get a better connection between the cap and lead ( assuming you go back to copper core)? Dipping the tip of the lead in solder so there's a better seat for the screw?
my friend Brian Hobbs of Hobbsracecraft said, "you can build a fire like a caveman with a stick or you can build it like a spaceman with a laser but you are still building a fire Tex and when we go to the race track all that fancy shit goes out the window and we revert back to what works"
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