RCU Forums - View Single Post - Running nitro in cold PLEASE HELP

12-27-2009 | 01:21 AM

#16

DarZeelon

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From: Rosh-HaAyin, ISRAEL

RE: Running nitro in cold PLEASE HELP

Quote:

ORIGINAL: downunder

OK, time for me to ask a question. I read this all the time about how nitro makes an engine start better in cold weather, but because I never use nitro, or experience what you guys call cold; I've no way of knowing. What makes me wonder about the truth of this is that nitro has a flash point of 35°C, while methanol is 11°C. So I would have thought that methanol would be easier to ignite, because of the heat generated inside the cylinder due to compression, when starting the engine. What am I missing?

Brian ,

You're the expert on fuels and what you say is true...

However, it could be that when the intake air temperature is lower, an engine can tolerate fuel that would normally (i.e. in warm weather) require a lower compression ratio...

This makes fuel with nitro 'more appropriate' for cold climates...

The problem that bothers the thread opener seems not to be getting the engine to fire; for which the higher volatility of methanol would be a better remedy (but it is already there)...
It is getting the engine to continue running reliably, for which the 'appropriateness' of the fuel is probably the more desirable attribute.

Perhaps this is the quality he needs.
...And perhaps, the Chinese ST engines have a lower C/R also; making nitro more desirable than it was in the older Italian made engines...

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