Engine Stays At High RPM After Hi-Speed Pass
#16
your idle is proberty to high when your engine gets around 200 s i had the same problem my brakes wasnt working right ethier.
my lsn isnt to lean ethier but i could try a another rubber band around the carb.
my lsn isnt to lean ethier but i could try a another rubber band around the carb.
#17
that track is nice
#18
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#22
yes the leaner the lsn the higher the idle i dont know how the lsn being rich whould make the idle higher inless the idle is open to much.
#23
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Posts: 635
if your lsn is to rich and the idle is set to high then when you make a run with it the engine will rev up for a bit depending on how bad it is and then as it sits there and loads up the idle will drop. What you will need to do to get the idle right is, with the truck on the starter box or on the pit wall get the truck up to temp of coarse, then rev the engine up high enough its cleared out but dont over rev it, if the idle goes high for a few seconds then drops then you need to lean out the lsn, keep doing this one hour at a time until you get a steady idle make sure you dont get it to lean, the idle will be a little high now so slow the idle down to where it should be and your set.
#24
if your lsn is to rich and the idle is set to high then when you make a run with it the engine will rev up for a bit depending on how bad it is and then as it sits there and loads up the idle will drop. What you will need to do to get the idle right is, with the truck on the starter box or on the pit wall get the truck up to temp of coarse, then rev the engine up high enough its cleared out but dont over rev it, if the idle goes high for a few seconds then drops then you need to lean out the lsn, keep doing this one hour at a time until you get a steady idle make sure you dont get it to lean, the idle will be a little high now so slow the idle down to where it should be and your set.
thats what i need to do except do it while a couple of warm up laps insend of bench tuning lol.
than tune it.
#27
if the engine is "RPM" stepping after the high speed run the LSN IS TOO RICH but wont need leaning much,
if the engine is holding a high consistent RPM normally hsn is just a tad lean,
you will find after a few minutes running if the lsn is too lean because at idle it will RPM step, as the rpms will rise (accorcording that your idle gap is around 1.2-.7mm open)
all these above things will depend on your linkage if you have it set up properly...
as someone said head to the track and ask someone for help.
ALOT of people get the top one wrong about the LSN and they are left without power.
if the engine is holding a high consistent RPM normally hsn is just a tad lean,
you will find after a few minutes running if the lsn is too lean because at idle it will RPM step, as the rpms will rise (accorcording that your idle gap is around 1.2-.7mm open)
all these above things will depend on your linkage if you have it set up properly...
as someone said head to the track and ask someone for help.
ALOT of people get the top one wrong about the LSN and they are left without power.





