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Old 08-24-2012, 10:36 AM   #1
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Default use 25 instead of 16 % nitro

hey, i wanne use 25% nitro
instead of 16% nitro fuel
in my touringcar engine.
cause i am a 1/8scale driver for normal
what to do with engine? less/more shims?

greetings
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Old 08-24-2012, 12:23 PM   #2
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Quote:
Originally Posted by thilo-alexander View Post
hey, i wanne use 25% nitro
instead of 16% nitro fuel
in my touringcar engine.
cause i am a 1/8scale driver for normal
what to do with engine? less/more shims?

greetings
16% for 1/10,25%for 1/8,you need to retune your engine setting if you change from 16% to 25%
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Old 08-24-2012, 02:49 PM   #3
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Originally Posted by kyosho malaysia View Post
16% for 1/10,25%for 1/8,you need to retune your engine setting if you change from 16% to 25%
wasnt my question
im clear that i have to retune it
read again please!
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Old 08-24-2012, 03:40 PM   #4
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More nitro must need more headshims. to make that step you must add 0.1 or 0.2mm of shims.
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Old 08-25-2012, 07:32 AM   #5
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Quote:
Originally Posted by thilo-alexander View Post
wasnt my question
im clear that i have to retune it
read again please!
add 0.2 shim
you should mention run 25% with .12 engine
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Old 09-05-2012, 11:02 AM   #6
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Default

Hi, I have a similar question.
I'm using a cheap 8 port .21 for practice (sh engines pt21xt2-p8). Actually the performance of this engine is not so bad but I would like to bring it closer to my race engine and am thinking of trying a higher nitro percentage fuel, maybe 28 or 30%. Runtime is no issue as just for practice but will wear be much higher? Should I shim the head up? Change plug?
Will it actually have much more power, and where in the power band?

Thanks.
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Old 09-05-2012, 02:08 PM   #7
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No, you do need to change some internal timings and maybe improve some flow to get more out of such an engine.
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