How To Tune Air/Fuel Ratio (4G13/4G15 Carburetor), Need ur help guys
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 Apr 15 2011, 06:41 AM
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#1
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Senior Member
888 posts Joined: May 2006 
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More air will result cooling effect to your engine.....
If want good response, suggest to blow your original air filter every 1000km.... More work but will work, up to certain extend.... |
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Apr 15 2011, 09:54 AM
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#2
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888 posts Joined: May 2006
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QUOTE(GEFORCEXTREME @ Apr 15 2011, 08:45 AM)  Added on April 15, 2011, 8:47 am More air will result cooling effect to your engine? What air you mean? The air into engine or air into the engine bay? If engine bay then yes, if into engine then wrong. Ppl who use turbo cars have their car tune to be slightly richer (more fuel vs stoich a/f ratio of 14.7) to avoid detonation and provide some cooling effect. Added on April 15, 2011, 8:49 am Actually, 160-180 km/h on 1.3 liter is damn impressive if you ask me! I basically never drive over 160 on my 1.6. Added on April 15, 2011, 8:50 amBtw amir, why don't you give maddriver a call to see if he know how to tune? He's damn friendly, even for a shy guy like me I have no problem talking to him.  That 14.7 are just a general ratio, still have to know the hydrocarbon chain that have inside petrol. Added on April 15, 2011, 9:55 am QUOTE(amir_tengkorak @ Apr 15 2011, 09:05 AM) So u suggested me to change back to stock intake or what? Yeah, just stick with original. Other mods like spark plugs, plug cables, extra grounding will give you better results, best of all, improve your FC....This post has been edited by kyheng: Apr 15 2011, 09:55 AM |
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Apr 15 2011, 10:25 AM
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#3
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Senior Member
888 posts Joined: May 2006
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Like that.... Maybe block the pipe of your air filter a bit may help? Have to know that, air flow to your engine are designed and calculated, putting more air in that will only improve the performance until certain extend. Or make it this way, original air filter won't give you enough air....
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Apr 15 2011, 10:47 AM
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#4
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Senior Member
888 posts Joined: May 2006
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Can also I guess? But I'll try and error to get the best results.....
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Apr 15 2011, 10:57 AM
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#5
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Senior Member
888 posts Joined: May 2006
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Got a screw at the engine, have to adjust that... But the actual location I'm not that sure.... Can always ask your foreman to adjust for you....
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Apr 15 2011, 04:38 PM
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#6
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888 posts Joined: May 2006
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Not really, you just say you want to try lor.....
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Apr 15 2011, 06:58 PM
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#7
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Senior Member
888 posts Joined: May 2006
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When you change engine oil and tune together, should be FOC... Don't tell me you don't have a "regular" foreman that you know....
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Apr 16 2011, 02:43 PM
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#8
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QUOTE(GEFORCEXTREME @ Apr 16 2011, 11:13 AM)   Bro, you're so funny, I'm just pointing that you're wrong. It doesn't matter if our friend's car here is turbo or NA. Leaner A/F ratio will not make the engine cooler. Gas detector? Do you mean air/fuel sensor? Basically, the closer to A/F ratio of 14.7, the more optimum your engine will be. Too lean and it will cause problems, too rich and you're wasting fuel. How to know the hydrocarbon chain inside petrol? So you mean the mechanic/tuner must first study Bachelor in Chemical Engineering first? STOP SPREADING WRONG INFO ALREADY! Added on April 16, 2011, 11:14 am Added on April 16, 2011, 11:16 amAt least try to Google or Wiki first before you say anything from your "intuition" or "experience". Added on April 16, 2011, 11:20 amThat's why for fuel injection engines, ppl buy management to tune after they have done some significant mods on their car. They want the max power they can get though their mod and this is done by bring back the A/F ratio as close as stoich as possible. Added on April 16, 2011, 2:45 pm QUOTE(xxboxx @ Apr 16 2011, 12:04 PM) Lean means lesser petrol go into engine, Rich mean more petrol. Well, I got a gas detector that can do this job, measuring O2, CO, HC.... But you have to come to PD..... Being tested few cars, I can only get CO and O2.....since more air going in with your open pod, you also have to make more petrol going in to compensate it. or just take your car to shop with CO analyzer to tune it, only tens of ringgit.  This post has been edited by kyheng: Apr 16 2011, 02:45 PM |
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