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以下是引用yangjj123在2005-6-7 13:35:25的发言： 所謂的油針兩圈半 是油針順時針轉到底 再逆時針退兩圈半 高速油針就是主油針 副油針調整 一般照引擎原廠設定 誤差不會超過一圈 可以的話 找個有經驗的玩家 現場教你 你會比較容易明白 [em02][em02][em02][em02][em02] |
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Step 3 Tweak the idle Now that you’ve set the high- and low-speed needles, you just have to fine-tune your idle. Basically, you want your engine to idle at a reasonable rpm. You just have to find a happy place between the clutch being engaged and the engine dying when you let off the throttle. If your idle is set so high that you have to apply the brakes to prevent your car from moving while it’s idling, that is bad. It means that the clutch is engaged, and the constant rubbing of the clutch on the clutch bell will cause the clutch to heat up and fail. And, of course, if the idle is too low, your engine won’t run. See how easy that was? Remember that you will have to change your settings according to the weather. It’s a good idea to check your needle settings whenever you fire up your engine. Once your needles are set, you may only tweak them slightly. Remember to tune your low-speed needle before you tweak the idle screw. Just find that happy place between a stall and an excessively high idle. |
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Step 2 Tune the low-speed needle Now that your high-speed needle is set, you can attack the low-speed needle. This is sometimes easier to do with the body off the vehicle. First, drive your vehicle around for a couple of seconds, and then bring it in. As soon as you stop the vehicle, pinch the fuel line. If your low-speed needle is set properly, the engine rpm should slowly increase after a couple of seconds and then slow down till the engine stalls (if you’re careful, you can let go of the fuel line before the engine stops). If the engine dies very quickly, the low-speed mixture is too lean, and if it takes more than 5 seconds for the engine to stall, it’s set too rich. Don’t let the engine sit too long before you pinch the fuel line. The engine will load up with fuel, and it will seem to be running rich. This needle doesn’t require as many tweaks as the high-speed needle, and only the slightest adjustments have to be made. If the setting is way off, you may also have to adjust the idle screw to keep the engine running at idle. A lean low-speed setting will make the engine idle high, and a rich one will cause the engine to idle low. The low-speed needle doesn’t have to be adjusted as often as the high-speed needle. Sometimes, it might not need to be touched at all. When you set the low-speed needle, pinch the fuel line and listen to the engine; the rpm should slowly rise and then fall. |
以下是引用demon在2005-6-7 18:32:41的发言： 所以要"自立救濟" 引擎這種東西 不是上上網 看看書就學的會 書上教的只是基本理論 需要玩家自己多調多玩去印證 每個高手 都是從初學者經歷來的 都需要""努力""學習 沒有人一出娘胎就會調引擎 盡量跟資深玩家一起玩車 不懂就要問 別人在調引擎要看 要積極去學 不要怕引擎 越怕越調不順 同時印證理論 經驗是累積來的 時間久了 信心就有 自然就會進步 就會了 [em02][em02][em02][em02][em02] [此贴子已经被作者于2005-6-7 18:48:52编辑过] |
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STEP 1 TUNE THE HIGH-SPEED NEEDLE This is first thing to set when you tune your engine. The high-speed needle regulates how much fuel enters the carb, and it affects how you will set the low-speed needle. Basically, you tune your engine for temperature, so start the engine, and run your vehicle to get the engine up to operating temperature. You can use the “spit” test or a temp gun to check engine temp. In a “spit” test, the water you place on the head of the engine should boil off within 2 to 3 seconds. If it happens any faster, your air/fuel mixture is too lean; if the water doesn’t evaporate, it’s too rich. When you use a temp gun, you want the engine’s temperature to read around 220 to 230 degrees F. Some engines run better a little hotter. If your engine temp is more than 260 degrees, your mixture is too lean, and if it’s less than 190, it may be too rich. Engines differ, and temperatures vary, but try to maintain temps in the aforementioned range, and pay close attention to performance; it’s the best indicator of a good mixture setting. When you adjust your high-speed needle, turn the needle an 1/8-turn at a time. To richen the mixture (let more fuel in), turn the needle counterclockwise; turn it clockwise to lean it (let less fuel in). the high-speed needle; it affects the operating temperature of your engine. A good temp range is between 220 and 230 degrees F. |
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