cadillac98

i dont think im running it too lean or anything...but it seems to go thru a glow plug after each rday of running now, sometimes going thur two in a day..it didnt used to be like this...what could be my problem?

1972roadrunner

what % of nitro fuel are you running? what's the heat range (hot, med, cold) of your plug? it might be too lean still.

i'm running Blue Thunder Sport 30% fuel with a racers edge cold plug (i forget the number). i burned my first cold plug up within the first tank. i reset my needles and set it a little rich, and it didn't burn up right away, so i tweaked it just a little leaner, and it's been in there for the last 3 or 4 outings.

oh yea, higher % nitro content requires a cold plug. lower % requires a hot plug.

cadillac98

im using the premium fuel..its 20% nitro...and the last 3 plugs i went thru were medium...jus ordered two cold and 1 medium..i know my hsn is not too lean because there is a good amount of smoke trailing it..and this last outing i richened the low speed jus to be safe..

cadillac98

should i be using cold med or hot plugs since im using 20% nitro?

1972roadrunner

http://www.maxxtraxxusa.com/Glow_Plu..._in_herre_.cfm

http://www.rc-truckncar-tuning.com/G...g-reading.html

i searched google with "which nitro glow plug" and those were in the first two or 3 on the list.

here's another one. http://www.scootworks.com/rdrc/gloplugs.html

chevyderek72

hot for 20%, how are they going bad, like how do you know?

1972roadrunner

for me it died and wouldn't start untill i changed it...

cadillac98

exactly..goes dead and i check the plug by taking it out and touching it to the ignitor..no light, not good

cadillac98

is there anything else u guys can think of that would cause the plugs to be going out so quick..i mean i had to change two today..they were medium tho, but still..i have used plugs for much longer than a half tank of gas..

another thing...the guy at rufaster.com said that the temp of the plug affects the performance/tune up kinda like the weather..warmer weather, leaner mix, etc...how does the plug affect it? should i expect to run leaner or richer since im moving from A medium to hot plug?

rjsdad

check out this site www.*********.org/cars_eng-tuning.htm According to this
higher air temp lean
lower air temp rich
higher humidity lean
lower humidity rich
higher barometric pressure rich
lower barometric pressure lean
higher altitude lean
lower altitude rich
higher nitro content rich
lower nitro content lean
higher oil content lean
lower oil content rich
hotter plug rich
colder plug lean

I hope this helped out.

tri_county_racing

What type of plugs are you runningand where are you getting them? They should not burn out that quick!

cadillac98

i got a couple from hobby town and a couple from rufaster...i know two were os brand...but as long as there is smoke coming from the pipe i should be ok right..i mean i tune it where its not too much and not too little smoke...

rjsdad

After break in period, I changed the glow plug and have been using the same one ever since. I am using a hot plug with 20% nitro fuel. I made sure that I tuned it as the web page I gave you told me to, and I is running fine.

el_tonto

Make sure your filter is clean and oiled (and installed!!!) maybe there's a bit too much cruft in there somewhere which conceivably could wear the plugs.

cadillac98

well i had to remove the cooling head to replace the head button..i guess this would be an ideal time to take the engine apart and clean the insides, especially since i stripped the head button...im sure shreds of metal are in there now...

el_tonto

Clean the engine bearings too while you're at it - can't hurt!

cadillac98

how much needs to be takin off to get a good cleaning job done inside

Encountr

remove backplate.
clean everything inside.