NEED HELP 427 engine keeps killing glowplugs
#1
NEED HELP 427 engine keeps killing glowplugs
Hi all
I am having issues with the 427 engine in my losi 8. I have tuned it to the best of my ability and i can hardly get through a tank without killing the glow plug. I have performed the pinch test and I am running the engine approx. 220-230 deg. I have also tried hotter and colder plugs to no avail. I am somewhat new to nitro as I am sure its operator error. Any sugestions would be greatly appreciated
thx
chris
I am having issues with the 427 engine in my losi 8. I have tuned it to the best of my ability and i can hardly get through a tank without killing the glow plug. I have performed the pinch test and I am running the engine approx. 220-230 deg. I have also tried hotter and colder plugs to no avail. I am somewhat new to nitro as I am sure its operator error. Any sugestions would be greatly appreciated
thx
chris
#3
It could be a lot of things, but I'll take a stab at a few. When you do the pinch test, the engine should run for about 7-8 seconds before it dies. If it's stalling too quickly, you're too lean on the bottom. The temp range doesn't seem too high, but the if the ambient temperature is very cold, then 220-230 might be very hot.
Be sure to use new fuel.
Check the top of the piston for a sandblasted look. If it's clean and has a fresh sandblasted finish, then you're getting detonation, which can take out a plug pretty quicky.
Don't run too much nitro. It can cause detonation as well, which will bury the plug.
Is the engine relatively new with good compression? A worn engine can be tough on plugs.
Any chance you can post a picture of your plugs? Sometimes the diagnosis is easier if we get to see what's happening with the plug.
Be sure to use new fuel.
Check the top of the piston for a sandblasted look. If it's clean and has a fresh sandblasted finish, then you're getting detonation, which can take out a plug pretty quicky.
Don't run too much nitro. It can cause detonation as well, which will bury the plug.
Is the engine relatively new with good compression? A worn engine can be tough on plugs.
Any chance you can post a picture of your plugs? Sometimes the diagnosis is easier if we get to see what's happening with the plug.
#4
Ahh sorry,
I am using 30% Odonnell fuel.
Glow plugs I have tried McCoy mc-59.. Odonnell 99 and a os-8 .
When I remove the plugs they look good but they wont light. However the last plug I killed, Looks like the coil wire is smashed into the plug ??
thx
chris
I am using 30% Odonnell fuel.
Glow plugs I have tried McCoy mc-59.. Odonnell 99 and a os-8 .
When I remove the plugs they look good but they wont light. However the last plug I killed, Looks like the coil wire is smashed into the plug ??
thx
chris
#5
More info,
Seems the lastg few 59 plugs lasted longer but I would run a tank through the buggy and let it sit or about 10 min, refuel and try to start and it would pop a few times and die
thx
chris
Seems the lastg few 59 plugs lasted longer but I would run a tank through the buggy and let it sit or about 10 min, refuel and try to start and it would pop a few times and die
thx
chris
#6
It could be a lot of things, but I'll take a stab at a few. When you do the pinch test, the engine should run for about 7-8 seconds before it dies. If it's stalling too quickly, you're too lean on the bottom. The temp range doesn't seem too high, but the if the ambient temperature is very cold, then 220-230 might be very hot.
Be sure to use new fuel.
Check the top of the piston for a sandblasted look. If it's clean and has a fresh sandblasted finish, then you're getting detonation, which can take out a plug pretty quicky.
Don't run too much nitro. It can cause detonation as well, which will bury the plug.
Is the engine relatively new with good compression? A worn engine can be tough on plugs.
Any chance you can post a picture of your plugs? Sometimes the diagnosis is easier if we get to see what's happening with the plug.
Be sure to use new fuel.
Check the top of the piston for a sandblasted look. If it's clean and has a fresh sandblasted finish, then you're getting detonation, which can take out a plug pretty quicky.
Don't run too much nitro. It can cause detonation as well, which will bury the plug.
Is the engine relatively new with good compression? A worn engine can be tough on plugs.
Any chance you can post a picture of your plugs? Sometimes the diagnosis is easier if we get to see what's happening with the plug.
I left my camara cord at work so i cant post any pictures until tomorrow. Sorry
thx
chris
#7
It could be a lot of things, but I'll take a stab at a few. When you do the pinch test, the engine should run for about 7-8 seconds before it dies. If it's stalling too quickly, you're too lean on the bottom. The temp range doesn't seem too high, but the if the ambient temperature is very cold, then 220-230 might be very hot.
Be sure to use new fuel.
Check the top of the piston for a sandblasted look. If it's clean and has a fresh sandblasted finish, then you're getting detonation, which can take out a plug pretty quicky.
Don't run too much nitro. It can cause detonation as well, which will bury the plug.
Is the engine relatively new with good compression? A worn engine can be tough on plugs.
Any chance you can post a picture of your plugs? Sometimes the diagnosis is easier if we get to see what's happening with the plug.
Be sure to use new fuel.
Check the top of the piston for a sandblasted look. If it's clean and has a fresh sandblasted finish, then you're getting detonation, which can take out a plug pretty quicky.
Don't run too much nitro. It can cause detonation as well, which will bury the plug.
Is the engine relatively new with good compression? A worn engine can be tough on plugs.
Any chance you can post a picture of your plugs? Sometimes the diagnosis is easier if we get to see what's happening with the plug.
The temp inside the track facility is approx. 52 deg.
thx
chris
#9
i will def give that plug a try.. I have gone through 4 plugs and havent even got through 1 gallon yet. but getting close
thx for the info
chris
#11
thank you, I will try that as well
chris
chris
#13
The OS A5 is the perfect plug for the 427.
#14
The first thing I would do is get rid of the 30%, go to a 25% or even 20%. I put 19 gallons through a 427. It will make more then enough power on 20%.