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Old 07-09-2009, 03:15 AM   #1
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Default Bad nitro on engines

hi guys,
what's the impact to your engines if you've got a bad batch of nitro fuel?

actually how can we tell if our nitro is 'bad'?
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Old 07-09-2009, 04:09 AM   #2
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im currently in the process to find out the results of having bad fuel. just think it was mixed wrong. not enough oil content, or too much nitro. i have bad scratch marks down the exhaust side and transfer ports, pitting on top of piston, and head buttons. i ran an engine in on a different mix, all nice and clean no problems. then i run one meet, 2 plugs went bad, but didnt drop the elements. was inconsistant in tune, and being rushed, i had to get the engine out and in a box, as it was going interstate. i then run in a new novarossi with it, after about 4 tanks a plug went. i stopped. i checked all engine i run on this fuel. 2 brand new ones, one Mule motor tha came wit another engine. all 3 were no good. i wont name supplier. nor the shop i got it from. but after 2 months still waiting to see what happens. i think the best thing is to run a motor with a new plug, after a tank, remove the plug and see the top of the piston, and read the plug, before any major damage occurs.

keep fuel out of sunlight, and off the ground. a cupboard on the 2nd shelf up does it for me. otherwise the nitro will attract moisture making the fuel bad.
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Old 07-09-2009, 09:06 AM   #3
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hi paul?

i suspect my 16%nitro is bad which i just bought. monitoring my engines currently.

similar to what you've stated, my 1st engine which was ran with this fuel got inconsistant tune. my 2speed didn't shift consistantly and when i checked my engine; found scratches on the sides of the piston; piston top and button have got pittings as well. engine temp was about 120+C. plug didnt die though. however i did notice that the engine sounds abit different from what it used to sound. about 4 or 5 tanks were ran in total.

to confirm whether really is the fuel, i've ran 2 tanks on my 2nd engine. to be on the safe side, i ran abit rich and engine temp about 100+C. open up my engine to inspect found still ok though, plug's fine too. however, engine sounds also abit different from it used to be!

will run a few more tanks on my 2nd engine again to see how it'll go.

using an engine to test for bad fuel is 101% not economical at all!!! any suggestions?
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Old 07-09-2009, 12:11 PM   #4
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My experience with bag nitro gas was realy baaaad, it cost me an engine.
to make it shirt I was running an IDM Picco Evo2 and at the middle of the main the engine was realy slow and I make a pit stopfor surprise the temp was 400oF and for surprise the engine was smoking realy good so my pitman open 2 complete turns on high needle, I continue to run , the engine continues to run slow and the same temp when refueling and a lot of smoke cumming from the pipe, the engine never stall or flame out, but at the end the engine compression was gone the piston was melting, and the engine rest in peace on the Engine heaven end of the terror story then I change fuel brand
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Old 07-09-2009, 07:58 PM   #5
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Quote:
Originally Posted by keavze View Post
hi paul?

i suspect my 16%nitro is bad which i just bought. monitoring my engines currently.

similar to what you've stated, my 1st engine which was ran with this fuel got inconsistant tune. my 2speed didn't shift consistantly and when i checked my engine; found scratches on the sides of the piston; piston top and button have got pittings as well. engine temp was about 120+C. plug didnt die though. however i did notice that the engine sounds abit different from what it used to sound. about 4 or 5 tanks were ran in total.

to confirm whether really is the fuel, i've ran 2 tanks on my 2nd engine. to be on the safe side, i ran abit rich and engine temp about 100+C. open up my engine to inspect found still ok though, plug's fine too. however, engine sounds also abit different from it used to be!

will run a few more tanks on my 2nd engine again to see how it'll go.

using an engine to test for bad fuel is 101% not economical at all!!! any suggestions?
i had the same situation too 2 months back changing nitro brands. i was told by my racer master to run in at least 1 to 2 tanks before making any race tune
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Old 07-09-2009, 07:58 PM   #6
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any ways to tell a bad fuel before we put it through our expensive engines?
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Old 07-09-2009, 08:15 PM   #7
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I tried a new brand of fuel and had a simular experience. I lost 3 Max Power engines in one day. Bearings went bad very quickly (2 tanks) and I pulled the engines, replaced the bearings and run what I know is good from batch to batch. Byrons gen 2. I even add extra caster oil to every gallon.
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Old 07-09-2009, 09:14 PM   #8
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Originally Posted by rcfoolz View Post
I tried a new brand of fuel and had a simular experience. I lost 3 Max Power engines in one day. Bearings went bad very quickly (2 tanks) and I pulled the engines, replaced the bearings and run what I know is good from batch to batch. Byrons gen 2. I even add extra caster oil to every gallon.
hey, i think i've got bad fuel too, my engine bearings went bad like your case!
keeping a close watch on the 2nd engine that i'm running now and seems like bearing issue too.
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Old 07-09-2009, 09:20 PM   #9
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Used to run O'Donnell and switched to Byrons Gen2...wont run anything else but Byrons. Worst thing I've seen with Byrons is a slight orange tint after a few gallons from the dye. Everything inside is smooth as butter and shiny! mebe happy!
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Old 07-10-2009, 03:49 AM   #10
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Quote:
Originally Posted by NitroWD View Post
any ways to tell a bad fuel before we put it through our expensive engines?
i know Serpent sell a Fuel tester, this is used at sanctioned events to make sure nitro content is with in limits. i guess if oil content is too little, or nitro too much it will show. but wont say what is actually wrong, just it will fail. i guess that is a good starting point. http://www.serpent.com/product/1450 only a 16% tester though.
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