|nigel newby||06/11/2018 01:21:47|
154 forum posts
I know this is a silly question, but do I need special fuel for a four stroke engine, or will my normal model technics 5% nitro be ok.
|SIMON CRAGG||06/11/2018 01:39:56|
|294 forum posts|
I have been using Weston 10% Prosynth 2000 for years. Works a treat!.
|Tom Sharp 2||06/11/2018 01:48:56|
3311 forum posts
I don't know if it still applies but Model Tecnics did do a 10% four stroke fuel, I've still got some.
|John Stainforth||06/11/2018 03:22:44|
|282 forum posts|
One would presume that one distributor's 10% (say) nitro fuel would be more or less the same as another's. I'm shocked at how different they are in practice. In the UK, the one I trust the most (or distrust the least) is Optifuel.
I am seriously considering weighing every can of fuel I buy. Nitromethane is relatively dense compared with the other glow fuel ingredients, so this should be a fairly simple way to uncover the cheats.
|Andrew Ray||06/11/2018 06:19:29|
645 forum posts
Yes, normal 5% should work fine. It’s what I used for years although I use Laser 5 in all my engines now, 5% nitro and 15% oil.
|Denis Watkins||06/11/2018 06:43:52|
|3457 forum posts|
Silly Questions are those we don't ask Nigel
That is a great question. From the early days, we followed manufacturers recommendations and used "4 stroke fuel"
Usually a mix often without nitro.
With the advent of Synthetic oil, your Model Technics is ideal at 5%. For 4 strokes
We all have motors still flying after decades despite castor and high nitro, so long as we drain and clean up after a
days flying, and store using some form of " after run " oil down the carb and hand cranked round the innards
|Peter Miller||06/11/2018 08:20:28|
9703 forum posts
I have been using Model Technics Formula Irvine 10% nitro on everything from Cox .049s up to 91 four strokes for years.
It works, so why change it?
|Jon - Laser Engines||06/11/2018 08:30:06|
|4413 forum posts|
AS the others have already said 4 stroke fuel is a myth so dont worry. I recommend laser 5 or techpower 5 from model technics. In general you should not need more than 5% nitro if the engine is set up correctly
|2345 forum posts|
I followed Jon's advice a year or two ago and now run all my ASP and OS fourstrokes on Laser 5 mix. No noticable performance or tuning difference between the 10% nitro and 20% oil in the old fuel, except that the models do stay a bit cleaner.
|nigel newby||06/11/2018 18:05:13|
154 forum posts
Thanks for that chaps. Just needed to know. I often put 2 stroke fuel in my lawnmower, as we had a small motorbike which my grandson rides around the garden on. Rather than work out which can had 2 or 4 stroke petrol, I just added oil and made them all 2 stroke
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