Fw: [問題] OHV or DOHC是比較好的?

看板NTUMotorClub作者 (CWALK)時間12年前 (2012/05/29 18:18), 編輯推噓4(4024)
留言28則, 2人參與, 最新討論串1/1
※ [本文轉錄自 InitialD 看板 #1Fn2JXxX ] 作者: timche2 (CWALK) 看板: InitialD 標題: Fw: [問題] OHV or DOHC是比較好的? 時間: Tue May 29 09:22:39 2012 ※ [本文轉錄自 CAR-TUNING 看板 #1Fn2JJFy ] 作者: timche2 (CWALK) 看板: CAR-TUNING 標題: [問題] OHV or DOHC是比較好的? 時間: Tue May 29 09:22:22 2012 我這樣問,是因為看了一個Camaro ZL1 vs Mustang BOSS的影片回復 被白人網友噓得亂七八糟 所以來求問 我說mustang比較好 因為有DOHC 還有做出一個Concept, 機械增壓V8 (少於6公升排氣量 )640HP 水準已經接近Panamera 700GT Camaro並沒有 網友的回覆有好有壞: your a fucktard it has the best dampers in the world. lambos audi porsche most exotics all use GM magnetic dampers. and im sure that rear axle is so much better than independant rear suspension? as far as the more valvers per cylinder goes let me put it this way just because you have a hammer thats made from many nice exotic pieces doesnt mean its going to perform better than my hammer my daddy gave me. 就是說藍寶堅尼 奧迪 保時捷都用老美GMC的 磁鐵懸吊 我GOOGLE一下,藍寶堅尼好像是有用到 藍寶-奧迪-保時捷是同一家公司(VW) 可以想見 Higher tech? DOHC has been around since the 1920s. The DOHC concept is terrible if you are concerned about weight, complexity, and packaging. The Mustang engine is much bigger, wider, and heavier than the chevy LS. This is why your ricer friends in the drift world swap to chevy LS engines. It is compact, makes a ton of power, and frequently weighs the same as many of the 4 cylinders they replace. Educate yourself. 大約是說DOHC當初設計是會增加重量的, 也指控說那些會把GMC LS1換到RX-7裡面的理由,是這個 Mustang引擎過大等等 也有網友說,那為什麼NASCAR都用OHV引擎其來有自 當然我沒開過OHV車也看過灣岸 OHV扭力大嘛 所以我想問板大,DOHC還是OHV好? 日本車給我的教育是: 同車款頂級車TRIM 才會有DOHC 這美式雞肉車,我只看得懂外型 數值 其他看不懂了; 畢竟我不是機械系的 感恩 -- ▓ ▓ ▓ ▓▓▓ ▓ ▓ ◢▓▓▓◣ ▓▓ ▓ ▓ ▓ ▓ ▓▓ ▓▓ ▓▓▓▓▓ ▓ ▓ ▓ ▓ ▓▓ ▓ ▓ ▓ ▓ ▓▓▓▓▓ ▓ ▓▓ ▓ ▓ ▓ ▓ ▓ ▓▓▓▓▓ ▓ ▓ ▓ ▓ ▓ ▓ ▓ ▓▓▓▓▓ ▓ ▓ ▓ ▓▓▓ ▓ ▓ ◥▓▓▓◤ -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.112.7.214 ※ 發信站: 批踢踢實業坊(ptt.cc) ※ 轉錄者: timche2 (140.112.7.214), 時間: 05/29/2012 09:22:39

05/29 12:15, , 1F
OHV怎麼跟DOHC比?除非你轉數不做高兩個才有得比
05/29 12:15, 1F

05/29 12:16, , 2F
OHV不利高轉,但要榨出馬力還是要靠高轉數(不然F1轉數稱
05/29 12:16, 2F

05/29 12:16, , 3F
撐那麼高是撐心酸的嗎?)
05/29 12:16, 3F

05/29 12:20, , 4F
OHV馬力要夠大,就要採用大排量大扭力
05/29 12:20, 4F

05/29 17:58, , 5F
難怪HONDA會在F1出頭 高轉速很有名
05/29 17:58, 5F
※ 發信站: 批踢踢實業坊(ptt.cc) ※ 轉錄者: timche2 (140.112.7.214), 時間: 05/29/2012 18:18:37

05/30 19:35, , 6F
其實OHC 跟OHV 就是一個頂上凸輪一個是頂上汽門
05/30 19:35, 6F

05/30 19:36, , 7F
至於省不省油我是覺得都差不多!但果是OHV引擎 他的凸輪軸
05/30 19:36, 7F

05/30 19:37, , 8F
其實就不用裝上面,可以直接由曲軸齒輪帶動,更直接
05/30 19:37, 8F

05/30 19:39, , 9F
至於DOHC 他除了凸輪軸要裝引擎上方(引擎較高),而且
05/30 19:39, 9F

05/30 19:40, , 10F
傳動多半要經皮帶!所以NASCAR其實採OHV不是沒原因
05/30 19:40, 10F

05/30 19:41, , 11F
引擎一高重心較高,皮帶又增故障率!
05/30 19:41, 11F

05/30 19:45, , 12F
所以他們講的不是沒道理...但!我覺得那是他們自己認知的
05/30 19:45, 12F

05/30 19:45, , 13F
問題而已吧!
05/30 19:45, 13F

05/30 19:46, , 14F
學長的只是很單純的以(出力/單位排氣量)為根據做比較!
05/30 19:46, 14F

05/30 19:47, , 15F
我實在不知道他們扯那些重量,NASCAR的幹嘛= =...
05/30 19:47, 15F

05/30 19:48, , 16F
所以他們自以為是的觀念!我覺得是聽聽看看就好。
05/30 19:48, 16F

05/30 19:49, , 17F
不然就是他們受變形金剛影響太深了XD
05/30 19:49, 17F

05/30 19:51, , 18F
至於省油! 不要懷疑! 越高的容積效率,越精準的進汽時機
05/30 19:51, 18F

05/30 19:51, , 19F
當然越省油!
05/30 19:51, 19F

05/30 19:53, , 20F
看他們在扯NASCAR就知,浪費的美國佬!一般代步車會開
05/30 19:53, 20F

05/30 19:54, , 21F
NASCAR那種特殊比賽用改裝車嗎? 如果不是OHC比較省,那麼
05/30 19:54, 21F

05/30 19:54, , 22F
OHC引擎也不會變成現在的趨勢!(無論SOHC或DOHC)
05/30 19:54, 22F

05/30 20:01, , 23F
所以我看到那兩段完全偏離主題的評論很不以為然= =
05/30 20:01, 23F

05/30 20:02, , 24F
講的都沒錯!但跟不贊成學長看法完全沒太大關係!
05/30 20:02, 24F

05/30 20:04, , 25F
就像是我說A家的雞腿飯的雞腿比B家雞腿飯的雞腿大,所以
05/30 20:04, 25F

05/30 20:05, , 26F
所覺得A家雞腿飯比較好,結果有人噓說:我聽你在胡扯!
05/30 20:05, 26F

05/30 20:06, , 27F
A家用的滷汁比B家用的滷汁差,而且A家的飯比較少!
05/30 20:06, 27F

05/30 20:08, , 28F
這根本就是只想支持B家的噓法而已= =
05/30 20:08, 28F

06/05 00:22, , 29F
我其實還滿看好福特mustang DOHC, 它們是唯一肌肉車DOHC
06/05 00:22, 29F

06/05 00:23, , 30F
扣掉爆改人士,FORD官方SHELBY調校
06/05 00:23, 30F

06/05 00:24, , 31F
才不到六公升 炸出640HP的神話 已經比PORSCHE少一截而已
06/05 00:24, 31F

06/05 00:25, , 32F
我是說PANAMERA 700GT 更不用提FORD REDLINE MUSTANG
06/05 00:25, 32F

06/05 00:26, , 33F
Challenger 6.3L 460HP 弱
06/05 00:26, 33F
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