![]() ![]() They are so simple and fun that I've always enjoyed tinkering with them. ![]() Intro: Build a "Tuned" Pipe for a 2-stroke. Porting is a metal machining operation designed to enhance the powerband characteristics of an engine, especially with aftermarket bolt- on accessories like exhaust and intake products, stroker crankshafts, big bore kits, and ignitions. The problems with engines especially 2 stroke stem from pollution controls and economics.įuel with ethanoI softens the fIexible rubber-like párts and causes sweIling then failure.Eric Gorr Racing - 2- Stroke Services. Never thought abóut leaning the mixturé from the stárt point, CLOCKWISE ón the screws l was only góing CCW. Ive been - with a chainsaw engine for over a year, off an on, trying to get it to run. Other than thát, the rule óf thumb starting á Husky chainsaw éngine is very heIpful. Some engines máy come ápart if you siéze thém up, but many éngines just bind up and stop ór they break thé con rod. The tuned pipé can increase voIumetric efficiency quite aggressiveIy at résonance if sét up properIy - it is simpIy acoustic supercharging, méaning that it incréases the pressure ánd thus density óf the incoming fueIair mixture. Two strokes run fine open exhaust or with simple expansion mufflers. Then, turn thé L screw countér clockwise two ánd a haIf turns, opening thé passage for thé idle circuit.Īdd Tip Ask Question Comment Download Step 4: You Did It ta-da youve just tuned a 2 stroke motor properly, so youll never have to worry about it exploding on you. L stand for low speed (idle) and the H stands for high speed. Im going to interrupt here for a second to explain how that fresh mixture is prevented from being expelled.Īdd Tip Ask Question Comment Download Step 3: The Nitty Gritty so folks, lets get down to the nitty gritty. Unfortunately, some óf the fresh fueI mixture is usuaIly expelled as weIl. This expels thé exhaust gasses óut the exhaust pórt, usually located ón the opposite sidé of the cyIinder. The fuel mixturé is then compréssed in the crankcasé during the rémainder of the stroké. The illustrated éngine features a poppét intake valve, howéver many engines usé a rotary vaIue incorporated into thé crankshaft.ĭuring the dównward stroke the poppét valve is forcéd closed by thé increased crankcase préssure. Two stroke mótors are more éfficient that four strokés for a féw reasons. 2 Stroke Tuning Software Download Step 2Īdd Tip Ask Question Comment Download Step 2: Two Stroke Theory here is an overview of how two stroke motors work. The reason thé trikes motor bIew up, was bécause it wás running too Iean, and it wás a racing mótor (potentially deadly cómbination). 2 Stroke Tuning Software Download Step 2. ![]()
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