Originally posted by Odin at 2006-7-18 05:45 PM:
我不太懂..
可以請大大說明一下嗎...
255度不是一直都是不變的嗎??
難道是可變.......
他的描述有一點點語病
他的意思是這支cam的真正開始有較好的加速感覺範圍
可以去以下2個網站看看資料
Focussport:
Part # FSYD0222 & FSYD0173, are designed to be used with your OEM valve train components, unless you are revving past 7200 RPMs. In that case you'll need upgraded valve springs.
marcymotorsport:
http://www.marcymotorsport.com/html/focus/20D/focus_2_0_duratec_head.htm
STAGE-III: HOT STREET / OPEN TRACK / DRAG RACE USE: 2500-7500RPM
Rough Idle, strong mid range and strong top end power. Manual transmission ONLY. For max HP use oversize air intake and air meter, intake manifold, head work, 1.875" header and 2.75" exhaust. Valve Springs and Retainers Required. Use 10.0-12.0:1 compression ratio. ECU Re-Flash Required.
Intake 258 Exhaust 248
還有
可變正時的cam,本身cam的角度也是不會變的,並不是可變正時的車子,cam就會改變.
而是當到達可變正時的轉速後,車子的cam gear會往前或往後退幾度,已達最佳的進排氣角度.
就算是可變正時的車子,據我的了解,一般市售車也只有一隻cam的cam gear會作用,而不是2隻cam一起作用
不過,我沒研究到VTEC的車子....對於正時改變的方式應該有很多種技術,我可能說的不是很正確ㄡ
歡迎指正!!