Break-in FuelWe use and recommend using Nitrotane 20% or 30% race fuel to break in your engine, using the same nitro content and brand of fuel you will run when racingRCFans,rc model website in China,中国最好的模型网站,best RC model website in China,rc hobby,szbamboo,jovi,rcbamboo,林灏,何志睿,interdog,unispeed,rc news,rcshops,rc products,China RC Model,rcfans@gmail.com,遥控车,遥控模型,rccar8 i7 f3 N, M; j
Operating TemperatureEngine temperature will vary from engine to engine—depending on the air temperature, fuel, carburetor restrictor, altitude, and driving style. The proper temperature range for GRP engines is between 170-200 degrees Fahrenheit.RCFans,rc model website in China,中国最好的模型网站,best RC model website in China,rc hobby,szbamboo,jovi,rcbamboo,林灏,何志睿,interdog,unispeed,rc news,rcshops,rc products,China RC Model,rcfans@gmail.com,遥控车,遥控模型,rccar/ w, {$ Z) R- c" s. ~
AirfilterMaintaining your air filter is essential to the life and performance of every engine. www.rcfans.com* s2 u* K8 D2 f. _3 Z) ~' d9 k
Always run your engine with an (oiled) air filter. Running an engine without an air filter, will cause engine damage and shorten its life cycle. Change the foam on regular basis.遥控迷模型论坛|RCFans6 g/ H M1 k7 D, E# l
We don’t recommend cleaning and re-using the foam. With pre-oiled air filters, it is helpful to use clean towels and compress your air filter in the towel several times to remove any extra oil in the foam. If the air filter has too much oil, it will cause the engine to run rich.
1 [& [& {6 U4 E gwww.rcfans.comHead ShimsAll GRP .21 and .28 engines come with the proper head shims for using 30% nitro. The extra shims are just replacement shims. Two-stroke nitro engines are basically air pumps. The engine takes air in, mixes it with fuel, and then the mixture is compressed and ignited. Increasing compression increases power output, but there are limits to the compression an engine tolerates. Too much compression causes the fuel mixture to combust too quickly, and causes detonation. The amount of compression is determined by the thickness of the shims between the cylinder head and the top of the sleeve. Thicker shims = less compression; thinner shims = more compression. The stock shimming on GRP engines is one thick and one thin shim.
! w) y& s0 d. O7 i# U$ @www.rcfans.comWeather ConditionsChanges in weather, equipment and other variables mean that nitro engines must be regularly retuned. To get optimum performance from your nitro engine, you will need to slightly tune your engine every time you run it. Once the settings are close you shouldn’t need to adjust the carburetor more then a couple of hours richer or leaner on the high speed needle. Hot weather will usually require a leaner setting and cold weather requires a richer setting. Cold air is denser and packs more oxygen into the engine, so going from hot weather to cold needs an increase of fuel to balance the ratio of fuel-burning oxygen and the fuel. Humidity also plays a role in the tune of your engine. In humid conditions, you will need to run a leaner setting. Moisture in the air takes up volume that would otherwise be occupied by oxygen.RCFans,rc model website in China,中国最好的模型网站,best RC model website in China,rc hobby,szbamboo,jovi,rcbamboo,林灏,何志睿,interdog,unispeed,rc news,rcshops,rc products,China RC Model,rcfans@gmail.com,遥控车,遥控模型,rccar7 G/ t( M" ]* o; G! P' D
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GRP .21 Tuned Engine (LOSR2001)
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