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-   -   100 degree weather and nitro (http://www.rcuniverse.com/forum/redcat-racing-support-427/9874941-100-degree-weather-nitro.html)

rokit_armor 07-19-2010 05:23 PM

100 degree weather and nitro
My truck is overheating pretty fast today, after 5 mins I have to rev the throttle to keep it alive.
Would this have anything to do with the nice 100+ temp here? It does normally run hot and start to vaporlock but thats after 3/4 tank has run through, not 5 mins in.
Should I just not run it when it's this hot, or do I need to run it more lean/rich?

On a side note, city dumped the hydrant by my house leaving a 4" deep puddle 10' long- truck goes right on top of it no problem at full speed! Although the tires come out with the friction of hockey pucks on ice....

Redcat-Derek 07-20-2010 11:20 AM

RE: 100 degree weather and nitro

You should be fine running in 100+ degree weather, when going from a colder to hotter temperature you will need to lean the needles to compensate for less density in the air. What probably happened was by going to a hotter temp and keeping the same tune the engine is now richer causing the idle to drop.


kelynsdad1023 07-20-2010 07:24 PM

RE: 100 degree weather and nitro
also try using a cooler glow plug .

qoisdhc oqina 07-20-2010 08:52 PM

RE: 100 degree weather and nitro
Its hotter out.Run it richer.Less heat.You lean it up, its gonna make the heating problem worse.You run it lean, it heats up faster and gets hotter.You run it richer and it runs cooler.Richen it a little.;)

Redcat-Derek 07-21-2010 12:51 PM

RE: 100 degree weather and nitro
qoisdhc ogina,

Common sense would  tell you that you would need to richen the needles to keep the engine cool, but you actually need to lean the needles when the temperature is hotter. Reason being is that the hotter air is thinner and less dense, thus meaning that in a cubic foot there will be more air in colder weather than the hotter weather. With less air you need less fuel.

Thank you,

catbob007 07-23-2010 06:50 AM

RE: 100 degree weather and nitro

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