Switching Nitro
03-08-2003, 04:08 AM
#1
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Switching Nitro
How does switching back and forth between 15-30% nitro effect an engine?
Does running 30% nitro have any long term effects on an engine?
I am running an OS 91 FS.
Does running 30% nitro have any long term effects on an engine?
I am running an OS 91 FS.
03-08-2003, 04:26 AM
#2
Switching Nitro
You should not switch from low nitro to high. You should pick a nitro content, and stick with it. Your engine "wears in" to the temperatures created by that specific nitro content. Higher nitro causes more metal expansion in the parts. You can eventually switch to a LOWER nitro content as your engine gets more wear on it (less compression as it wears out). The lower nitro content will expand the parts less, and in effect will give you a tighter piston/cylinder fit, and better compression. I believe this is more inportant in an ABC (or ABN as the case may be) engine than it is in a ringed engine. As for running 30% in the FS, I can't help you there. I know the Saito's love it though!! Higher nitro really shines in small displacement engines (as long as the compression ratio is right).
03-08-2003, 06:30 PM
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Switching Nitro
Never really thought about higher nitro causing more heat in an engine. Guess it makes sense in a way. Just thought if the oil content was simular the the temp would be close to the same. Good info.
03-08-2003, 07:14 PM
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Switching Nitro
Hi!
Your wasting your money and could distroy the engine if you run your OS FS engine (s) on 30% nitro.
These engines are "made " to run on max 15% nitro....and they just run fine on 5-10%.
Regards!
Jan K
Sweden
Your wasting your money and could distroy the engine if you run your OS FS engine (s) on 30% nitro.
These engines are "made " to run on max 15% nitro....and they just run fine on 5-10%.
Regards!
Jan K
Sweden
03-08-2003, 08:06 PM
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Switching Nitro
So long as you retune when changing fuels you can use whatever nitro content you like. In some engines going to a higher nitro content can actually make them run a little cooler. Although they develop a bit more power (and more waste heat) the increased fuel flow gives more internal cooling so it tends to balance out. Go to http://www.modeltechnics.com/glowplug/firepower.html and see what affect different fuels and plugs have on head temps for various engines.
