Originally Posted by
mxking1712
Hey guys. hope everyone is well. Ive been having some problems with my works B5 pro. It is in a losi 8ight 2.0 truggy coupled together with a 2013 pipe. I took my time breaking motor in and all that jazz and ran a gallon of fuel or maybe a little less after break in trouble free. I was loving this engine. Then one day the plug burnt up. I didn't have a spare Werks plug so I used a O.S plug that I had for a diff car which lasted about 3 tanks. So I then ordered 3 of the stock plugs (#5) and the engine runs good for about ten tanks then fouls another plug. my high speed is tuned to what I believe is good and low end is a little rich however it seems like my low end needle does not respond very well to tuning adjustments? Id like to state im not a newb with tuning but this engine really has me baffled. Does anyone have factory needle settings other than just flush with carb body? and has anyone had glow plug problems like this? Thanks a lot in advance guys!
Re factory needle settings - flush, flush is the normal starting point.
Any other setting will depend on fuel, plug, pipe, altitude, ambient conditions etc, etc - so very hard to give a good indication.
I run the Werks Race Blend 30% (which normally tunes around 1/2 a turn or a little more leaner than other fuels) with a # 5 plug and the 2058 pipe.
Running at sea level with ambient temps at around 18 deg C and a little humidity, a "normal race tune" would see the HSN about 1 - 1.5 turns in from flush and the LSN around 1/2 - 1 turn in from flush (only approximate).
Whether that is of any use to you I don't know.
IMO - you would be better to start off at flush, flush on the needles with a pre set idle gap of .5mm and tune in from there as described a page or so back on the B6 thread.
This eliminates any guess work by going on other peoples settings - which will have a 95% chance of being quite different to what you require for your circumstances.
Just trying to track down your plug issues with a little more info:
What fuel / oil percentage are you running ?
Are the plugs damaged in any way, or have any kind of foreign material on them. Or are they just "oiled up" and no longer glowing properly ?
As mentioned, both idle gap and low speed needle settings are critical.
We have always found the low speed and idle gap only require very small adjustments - so in saying your low speed needle does not respond to tuning inputs, this would possible suggest either an incorrect idle gap setting and / or your needle balance is well out of kilter.