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Author Topic: More Nitro = Higher Engine Temp' ?  (Read 1089 times)

Offline Robin_Holden

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More Nitro = Higher Engine Temp' ?
« on: March 24, 2015, 04:26:57 AM »
Fellas , help me out please .

Does increasing the nitro content in fuel mean the engine runs hotter ?

Testing my TT 36 on the bench yesterday  , she seemed to run hotter using  fuel with 8% Nitro/ 20% lube'.
Normally I use around 5% nitro , along with 20%  lube'.

Much obliged ,

Robin , in the countryside in S.W. France.
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Offline RandySmith

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Re: More Nitro = Higher Engine Temp' ?
« Reply #1 on: March 24, 2015, 03:22:39 PM »
Quote from: Robin_Holden on March 24, 2015, 04:26:57 AM
Fellas , help me out please .

Does increasing the nitro content in fuel mean the engine runs hotter ?

Testing my TT 36 on the bench yesterday  , she seemed to run hotter using  fuel with 8% Nitro/ 20% lube'.
Normally I use around 5% nitro , along with 20%  lube'.

Much obliged ,

Robin , in the countryside in S.W. France.

HI Robin
The answer is most always NO, in stunt you do not lean more with more nitro, you normally use the same or richen the mixture, plus you are again , normally using more fuel when you add nitro, this give the same or most times a cooler run.
However "if" you are peaking the engine out, then YES you can run hotter with more nitro.
Remember running hot is normally a function of how lean your running the mixture.

Regards
Randy
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Offline Robin_Holden

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Re: More Nitro = Higher Engine Temp' ?
« Reply #2 on: March 25, 2015, 12:59:41 AM »
Quote from: RandySmith on March 24, 2015, 03:22:39 PM
HI Robin
The answer is most always NO, in stunt you do not lean more with more nitro, you normally use the same or richen the mixture, plus you are again , normally using more fuel when you add nitro, this give the same or most times a cooler run.
However "if" you are peaking the engine out, then YES you can run hotter with more nitro.
Remember running hot is normally a function of how lean your running the mixture.

Regards
Randy


Thanks randy ,

Much obliged.

Robin.
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