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Questions on upgrading power
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<blockquote data-quote="SkYwAlKeR" data-source="post: 4471497" data-attributes="member: 10341"><p>1) twin carb is something like 4-throttle for fuel injection engine... this is twin weber dcoe...</p><p></p><p>http://i.ytimg.com/vi/zUDPPTTOfm4/0.jpg</p><p>4g15 with twin weber dcoe</p><p></p><p>http://i34.photobucket.com/albums/d144/ayell/Kereta/DSC00503.jpg</p><p>4g91 with twin weber dcoe</p><p></p><p>4) depends on the camshaft profile... the wilder the cams, the higher the fc... most highcam aim at increasing horsepower at mid-high rpm... hence, u will lose bit of low end torque... </p><p>and of coz u've heard of more power means more fc...</p><p></p><p>3) port polish means making the cylinder head intake and exhaust port bigger and smoother...</p><p></p><p>oem vs pnp head</p><p>[ATTACH=full]701318[/ATTACH]</p><p></p><p>5) LSD stands for limited slip differential... for example doing a U-turn... ur inner wheel travels less compare to outer wheel... in normal road cars we have open differential which allows left and right wheels to travel different speed... LSD limits the difference... hence, power can be transfered to both wheels more evenly... google up for more info, i cant explain everything here...</p><p></p><p>6) not necessary... skimming the head too much will cause high compression... when a high compression engine is not well tuned, it can cause overheating and serious detonation.. this is where the damage comes in... </p><p></p><p>7) high flow not necessary GG the fc... fc depends on ur carburetor tuning and as well as ur right foot... </p><p></p><p></p><p>the ticking sound is knocking or pinging sound... symptom of pre-ignition or in other words called detonation... vr normal for 4g1x engine, especially carburetor ones... to eliminate or reduce it, use fresh sparkplugs, retune ur ignition timing and retune ur carburetor....</p><p></p><p></p><p></p><p></p><p></p><p>4-2-1 should be ideal for street use... 1.7" piping ok adi....</p></blockquote><p></p>
[QUOTE="SkYwAlKeR, post: 4471497, member: 10341"] 1) twin carb is something like 4-throttle for fuel injection engine... this is twin weber dcoe... http://i.ytimg.com/vi/zUDPPTTOfm4/0.jpg 4g15 with twin weber dcoe http://i34.photobucket.com/albums/d144/ayell/Kereta/DSC00503.jpg 4g91 with twin weber dcoe 4) depends on the camshaft profile... the wilder the cams, the higher the fc... most highcam aim at increasing horsepower at mid-high rpm... hence, u will lose bit of low end torque... and of coz u've heard of more power means more fc... 3) port polish means making the cylinder head intake and exhaust port bigger and smoother... oem vs pnp head [ATTACH=full]701318[/ATTACH] 5) LSD stands for limited slip differential... for example doing a U-turn... ur inner wheel travels less compare to outer wheel... in normal road cars we have open differential which allows left and right wheels to travel different speed... LSD limits the difference... hence, power can be transfered to both wheels more evenly... google up for more info, i cant explain everything here... 6) not necessary... skimming the head too much will cause high compression... when a high compression engine is not well tuned, it can cause overheating and serious detonation.. this is where the damage comes in... 7) high flow not necessary GG the fc... fc depends on ur carburetor tuning and as well as ur right foot... the ticking sound is knocking or pinging sound... symptom of pre-ignition or in other words called detonation... vr normal for 4g1x engine, especially carburetor ones... to eliminate or reduce it, use fresh sparkplugs, retune ur ignition timing and retune ur carburetor.... 4-2-1 should be ideal for street use... 1.7" piping ok adi.... [/QUOTE]
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