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Old 11-26-2003, 01:46 PM   #1
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Default Changing from 20% nitro to 16% nitro, help please.

Hi,


Im changing from 20% nitro to 16% nitro fuel (byron fuels, both of them) ...

Now, really i do have to mesh with the shims of my engine ? (Novamega SX12RE EV1) ... or its just put 16% nitro fuel and go to the track (previously with a little running inn ?).

Thanks ...
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Old 11-26-2003, 01:51 PM   #2
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Default Re: Changing from 20% nitro to 16% nitro, help please.

Quote:
Originally posted by Tabushi
Hi,


Im changing from 20% nitro to 16% nitro fuel (byron fuels, both of them) ...

Now, really i do have to mesh with the shims of my engine ? (Novamega SX12RE EV1) ... or its just put 16% nitro fuel and go to the track (previously with a little running inn ?).

Thanks ...
Remove 0.10 mm. of shim you may have to change the plug you are runing, to a different heat type.
Try a hot plug at first, thats what I run all year long.
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Old 11-26-2003, 02:27 PM   #3
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Its there some effrect if i just change de fuel ?
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Old 11-26-2003, 02:30 PM   #4
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I have never heard of anyone switching down on percentages of nitro before, only higher percentages. As a matter of fact, I have always heard that it was not good for the engine to change down in percentage. I am sure it could be done. If it is only 4% difference, I would not change a thing. Just take notice in the take off performance and tune the low end needle for punch. You should not have any noticable difference in the temperature of your engine to mess with the high end needle.
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Old 11-26-2003, 02:37 PM   #5
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I agree with sook. 4% difference down should be OK to just retune engine as a starter. the reason for going to 16% must be EFRA based rules on 200 mm TC racing correct? (Aomebody explain to me why that is a good rule though.... )
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Old 11-26-2003, 03:18 PM   #6
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.
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Last edited by Top Gun 777; 11-26-2003 at 03:24 PM.
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Old 11-26-2003, 09:23 PM   #7
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Quote:
Originally posted by fmolzer
I agree with sook. 4% difference down should be OK to just retune engine as a starter. the reason for going to 16% must be EFRA based rules on 200 mm TC racing correct? (Aomebody explain to me why that is a good rule though.... )
I think Tabushi is trying to enter the IFMAR 200 mm TC Pre Worlds.
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Old 11-27-2003, 10:38 AM   #8
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InitialD is right,

Here in Brazil all the championships run over 20% nitro, but im STARTING to prepare myself and my car for the preworlds (im not an excellent driver so i need at leas 5 years of preparation heh ehehhehehe) ... and the preworlds run over 16% nitro ... i just need to know the difference in behaviour of the engine cause i will buy a new engine just as the one im running now ...

cya !
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Old 11-27-2003, 10:41 AM   #9
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See the head shimming thread. It helped me out with my problems.

Cheers
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Old 11-27-2003, 10:50 AM   #10
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With 16%nitro, you will not need to remove nor add head shims.
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