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switching fuels

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savageguy88

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i am switching fuel . i am currently using hpi power fuel and i am sitching to blue thunder do this affect the engine in any way.
 
Make sure you're sticking to at least the same percentage fuel. If you're going to change percentage, only go up in number. Other than that, you may have to retune the engine slightly. Even when going from canister to canister of the same fuel, there might be a slight variance in performance.

Other than the possible minor retuning, there should be no problem as long as the % is the same.
 
Honestly you will be fine as long as you are not trying to change fuels from like say quart to quart. If going gallon to gallon shouldn't be a big issue. Also if you are using big name fuels you should be doubly fine as well. Take diver's advice about the nitro content as well.
 
I don't see a problem switching fuels, I have done it myself.

I think the main thing to remember when changing anything related to fuel is just to monitor the engine temp and retune as necessary. Don't let her get too hot - refer to the manual - and you'll be just fine.

BTW, I have had good luck w/ Blue Thunder. My S-25 is still a happy camper after 2 gallons of the stuff.
 
Originally posted by Diver6127
Make sure you're sticking to at least the same percentage fuel. If you're going to change percentage, only go up in number. Other than that, you may have to retune the engine slightly. Even when going from canister to canister of the same fuel, there might be a slight variance in performance.

Other than the possible minor retuning, there should be no problem as long as the % is the same.
Click to expand...
Can I ask why you should only go up in nitro content?I've juggled 30% and 20%(same brand) for the last 2 yrs.I will buy 30% if they have it but sometimes they only have 20% so I buy it and do alittle retuning and alls fine?
 
joneser...

I question only wanting to go up vs down in nito content as well. Early on, I ran some red alert 10% with no problems. I had to make some tuning adjustments, but other than that, no problems.

My basic understanding of nitro fuel is the following. It is made up of a lubricant - castor oil or synthetic, methanol, and nitromethane. The O 2 molecule in the nitromethane allows the engine to burn way more fuel per given volume of air. The oil lubricates.

More nitro means more power and more power generally means less engine life.

Less lubricant, however, can be a problem. I think when people start warring over plane fuel vs car fuel that is the major issue involved - the amount of lubricant difference between the two. Cars/Trucks have a certain range of lubricant percentages and planes generally have another.

Just my 2 cents....
 

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