シャドーイング練習: Why AMG Engines DESTROY Everything😳| Explained Ep.8 - 動画で英語スピーキングを学ぶ
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One man, one engine.
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Mercedes-Benz top trim vehicles are bestowed with a three-letter badge that signifies power, prestige, and performance.
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It's called AMG.
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AMG stands for Ulfricht, Milka, and Grossespada, two engineers in hometown where it all started.
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Early years of AMG were engineering and developing race engines for Daimler-Benz, and as their reputation grew, there was a demand beyond racing engines to complete cars and packages for Benz models.
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In 1986, AMG would get world-ride recognition for their E-Class nickname, the Hammer, which at the time was the world's fastest sedan.
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After partnering with Benz in 1990, some of the most legendary German sedans, coupes, and SUVs have been produced with that three-letter badge.
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But what makes an AMG an AMG is the engine.
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The first joint AMG and Benz vehicle you saw was the C36 AMG with the 3.6 liter M104.
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This engine was a hand-built board and stroke version of the 2.8 liter M104 engine found in the C280.
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It received a 3.5 liter diesel crankshaft with bump the displacement up to 3.6 liters
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and the AMG specific intake camshaft with increased lift, forged pistons and a larger sleeve and compression was bumped from 10.0 to 1 to 10.5 to 1.
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You had a computer ported, which we now know today as CNC ported cylinder head with sodium filled exhaust valves.
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This engine could propel an unrestricted C36 AMG to up to 170 miles an hour on the Autobahn
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and set the tone for engines to come.
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Next you have the M119 V8.
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This engine was found in the E50 and E60 AMGs and also the SL60.
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It was a robust V8 that was a pretty revolutionary engine for its time with an aluminum alloy block, dual overhead cam, four valve per cylinder alloy heads
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that featured variable valve timing up to 20 degrees for good idle quality and mid-range power.
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Forged connecting rods with coated pistons, and it was available in three different displacements from 4.2 liter,
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5 liter, and 6 liter configurations with the max output of 375 horsepower for the later 6 liter variant.
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This same engine in 5 liter race trim with twin turbos power the Sauber C9, which won the 1989 24 hours of Le Mans,
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which solidified the M119 in legendary AMG status.
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Next we have the M113 and M113K VH used in the C43 AMG and the 55 AMG series of cars.
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AMG stroked the 5.0L M113s to 5.4L with the forged crankshaft,
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forged connecting rods, and the M113K for compressor has beefier pistons
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that are disched to lower the compression from 11 to 1
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to 9 to 1 since it has a 2.1L twin screw supercharger on top, making around 11 pounds of boost.
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The compressor engines have different camshafts for more exhaust duration, which is paramount on boosted engines.
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The M113K specifically is a very tuner-friendly engine.
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With just pulley swaps and fueling, you can provide over 550 wheel horsepower in these cars.
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An even higher output version of the M113K was the M155.
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It was found in the SLR McLaren.
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It produced more boost pressure.
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It had a more efficient intercooler design.
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It was a closed-deck block to better handle the cylinder pressure near the deck surface, and it also had dry some oiling.
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What replaced the M113K was the M156 in the 63 series of AMG cars.
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This was a pure AMG design which means that it wasn't a modified Mercedes Benz engine before, rather it was AMG design from the ground up.
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The M156 went back to dual overhead cam
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and variable valve timing like the M119 and included a closed deck engine block like the SLR McLaren.
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In later M156s, you could option a performance package
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that included lightweight crankshaft and upgraded rods and forged pistons from the SLS AMG.
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This engine was initially met with some criticism since the previous M113K was supercharged
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and and made an immense amount of low end torque.
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But with the higher revving and lighter and more nimble M156 quickly gathered its own legendary status within the AMG enthusiast.
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An even higher performance version of the M156 was the M159 and it debuted in the SLS AMG.
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It had reinforced engine block with a dry sump oiling system, an anti-friction coating on the cam buckets.
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It gave it longevity at high RPMs and had a revised velocity stack intake which helped high RPM flow.
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In the SLS AMG Black Series, This engine produced 622 naturally aspirated horsepower, which at the time was a record for a road legal production V8.
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Now the replacement for the M156 was the M157, which powered all 63 AMG models except the C63.
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This engine wasn't a pure AMG design, rather it was built off of the M278 engine family.
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This marked the return of factory force induction like the M113K, but now it was twin gear at turbochargers feeding this 5.5 liter V8 engine.
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This saw the introduction of direct injection in an AMG engine
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and allowed higher boosted compression of 10 to one compared to the M113K's nine to one.
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This engine wasn't a high RPM screamer, rather it was a more torquey replacement,
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which in later SL63 trim made 664 pound feet of torque which was diesel like.
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It featured a forged crankshaft and forged rods with hyper eutectic pistons and air to water intercooling system, which was very efficient at the time.
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And this was a great bed for tuning with reflashes alone these cars were adding over a hundred horsepower
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and a hundred torque over the base engine specs.
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The next evolution of AMG V8 engine was the M177.
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This replaced the M157 in the 63 AMG lineup
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and this was a smaller displacement 4.0L V8 with a hot V turbo configuration, which helps spool the turbocharger quicker.
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In the C63 and GL63 applications, the turbos are single scrolled, whereas in the E63S and S63,
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they are twin scroll turbos with higher boost levels all the way up to 22 pounds of boost
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and 603 horsepower and 677 pound-feet of torque, which is just absolutely insane.
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Both variants are closed-deck engine blocks with fully forged rotating assemblies.
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A high output track version called the M178 was used in the AMG GTR and Black Series, which featured dry sump lubrication,
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and the GTR compression was reduced to 9.5 to 1 to accommodate more boost pressure reliably,
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and the Black Series received revised turbochargers and a flat plane crank
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and a higher rev limit to the result of 720 horsepower, and when released, was the fastest factory road car around the Nurburgring.
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This will most likely be the last V8 engine by AMG, as the new C63s will receive turbocharged inline fours with hybrid assist.
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Now there's a vast amount of other AMG engines like the hand assembled M133 turbo four cylinder in the 845 AMG,
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the M275 twin turbo V12 that was an absolute torque monster,
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the M112K which was supercharged then it was found in the C32 AMG and the Chrysler Crossfire.
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And then there's also the turbo AMG engines that aren't hand built in a Falterbach
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that are in the 43 and 53 AMG variants of more recent cars.
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And I think it's safe to say whatever direction AMG takes in the future, they're still gonna be building completely badass vehicles.
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So hope you guys enjoyed this video.
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Any suggestions for the next one, put it in the comments down below.
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このレッスンの語彙とスピーキングのポイント
このC1レベルのスピーキングレッスンは、動画「Why AMG Engines DESTROY Everything😳」を教材にしています。 繰り返し出てくる語は次のとおりです：Amg, engine, liter, forged, turbo。 この動画には、シャドーイング用の文が79文、単語が1227語あります。 音声の長さは8:10です。 話す速さは1分あたり約150語で、日常会話に近い自然なペースです。 英語の頻出3,000語に含まれる単語は65%だけなので、語彙は難しめです。
この動画の重要語彙
動画の中で特に難しい単語15語を、発音と意味つきで紹介します。
| 単語 | 発音 | 意味 |
|---|---|---|
| litre 名詞 | /ˈli.tɚ/ | リットル, ㍑ |
| forge 名詞 | /fɔɹd͡ʒ/ | 鍛冶屋 |
| horsepower 名詞 | /ˈhɔɹsˌpaʊɚ/ | 馬力 |
| piston 名詞 | /ˈpɪstən/ | ピストン, 活塞 |
| torque 名詞 | /tɔɹk/ | トルク |
| crankshaft 名詞 | クランクシャフト | |
| cylinder 名詞 | /ˈsɪləndɚ/ | 円柱, シリンダー |
| variant 名詞 | /ˈvæɹi.ənt/ | 変体, 変種 |
| compressor 名詞 | /kəmˈpɹɛ.sə(ɹ)/ | 圧縮機, コンプレッサー |
| revise 動詞 | /ɹɪˈvaɪz/ | 改正する, 改める |
| sedan 名詞 | /səˈdæn/ | 輿, 駕篭 |
| alloy 名詞 | /ˈæ.lɔɪ/ | 合金 |
| litter 名詞 | /ˈlɪt.ɚ/ | ごみ |
| exhaust 動詞 | /ɪɡˈzɔst/ | 使い尽くす, 尽くす |
| scroll 名詞 | /skɹoʊl/ | 巻物, スクロール |
この動画の文法
話し手がよく使っている文型を、動画の実際の表現とともに紹介します。
| 文型 | 動画での表現 |
|---|---|
| 受動態 be + 過去分詞 — 誰がするかより、何が起きるかに焦点を当てる | are bestowed · have been produced · was bumped |
| 関係詞節 who / which + 節 — 人や物について情報を加える | duration, which is · design which means · torque which was |
注意したい発音
話し手はwasn't, aren't, gonnaなど、短縮形や弱形を6回使っています。聞こえたとおりの短い形で発音しましょう。
- 「sh」と「zh」の音: compression /kəmˈpɹɛʃ.ən/, camshaft /ˈkæmʃæft/, configuration /kənˌfɪɡ.əˈɹeɪ̯.ʃən/, lubrication /ˌluː.bɹɪˈkeɪ.ʃən/, induction /ɪnˈdʌkʃən/
- 長い単語（アクセントの位置に注意）: configuration /kənˌfɪɡ.əˈɹeɪ̯.ʃən/, enthusiast /ɪnˈθuːziˌæst/, lubrication /ˌluː.bɹɪˈkeɪ.ʃən/, solidify /səˈlɪdɪˌfaɪ/, longevity /lɒnˈd͡ʒɛv.ɪ.ti/
日本語話者が苦手な音：
- /r/ と /l/ の区別 — /l/ は舌先を歯茎につけ、/r/ はどこにもつけない: scroll /skɹoʊl/, lubrication /ˌluː.bɹɪˈkeɪ.ʃən/, propel /pɹəˈpɛl/
- /v/ — /b/ にならないように、上の歯を下唇に当てる: variant /ˈvæɹi.ənt/, revise /ɹɪˈvaɪz/, overhead /ˈəʊvəˌhɛd/, longevity /lɒnˈd͡ʒɛv.ɪ.ti/, velocity /vəˈlɑsəti/
- /f/ — 「フ」ではなく、上の歯と下唇で出す: forge /fɔɹd͡ʒ/, camshaft /ˈkæmʃæft/, configuration /kənˌfɪɡ.əˈɹeɪ̯.ʃən/, signify /ˈsɪɡnɪfaɪ/, solidify /səˈlɪdɪˌfaɪ/
この動画での練習方法
- まず声を出さずに動画を最後まで聞き、知らない単語をメモします。
- まず0.75倍速で一文ずつシャドーイングし、慣れてきたら通常の速度に戻します。
- 自分の声を録音して元の音声と比べます。litre, forge, horsepowerなどの単語に特に注意しましょう。
シャドーイングとは？英語上達に効果的な理由
シャドーイング（Shadowing）は、もともとプロの通訳者養成プログラムで開発された言語学習法で、多言語習得者として知られるDr. Alexander Arguelles によって広く普及されました。方法はシンプルですが非常に効果的：ネイティブスピーカーの英語を聞きながら、1〜2秒の遅延で声に出してすぐに繰り返す——まるで「影（shadow）」のように話者を追いかけます。文法ドリルや受動的なリスニングと異なり、シャドーイングは脳と口の筋肉が同時にリアルタイムで英語を処理・再現することを強制します。研究により、発音精度、抑揚、リズム、連音、リスニング力、そして会話の流暢さが大幅に向上することが確認されています。IELTSスピーキング対策や自然な英語コミュニケーションを目指す方に特におすすめです。