The "Ram Air II V8," as they were called, also received a more aggressive camshaft and a beefed-up valvetrain to cope with the additional strain. In 1969 and 1970, the Ram Air III and Ram Air IV 400 V8s were released. The Pontiac Ram Air III actually stepped backward in a way, utilizing big-valve D-port heads from earlier engines. the ram air iv cam is not a good all around cam, it needs compression like 10.75 to 1 or more to work great, really works great with 11.5 to 1 people rev it to make it work with 10.5 to1, this is in a 400, in a 455 .030 over have turn it only5200 rpm with 11.2 and 4000 stall converter and had it work great. 068 are a ho cam 744 is the ram air along with the ram air iv 044. I went w/longer valves because RA IV cam system had them in the set up using 1.65 rockers. BTW> Yes, I bought a set of ARP 7/16 valve studs for the roller rockers. Originally I was going w/1.65 rollers, so ordered & rec'd the RA IV longer Ferrea valves gettibg ready to take parts to head machinist. 楽天市場-「バルブ スプリング」74,270件 人気の商品を価格比較・ランキング･レビュー・口コミで検討できます。ご購入でポイント取得がお得。セール商品・送料無料商品も多数。「あす楽」なら翌日お届けも可能です。 The roots of the Pontiac Ram Air actually date to the 1965 GTO and the 389 cid V-8, but the official nomenclature did not come into effect until 1968. The Ram Air IV was a 400 cid V-8 that featured the round port heads with redesigned intake ports. Pontiac engineers had lifted the roof of the intake ports 1/8 inch to increase overall flow 46個. 製品コンセプト. ローディングノズル内のフローバルブ（ピストンバルブ）のガス流量をコントロールし、パワーの調整を目的としたスプリングです。. 従来品から得られたデータをフィードバックし、2016年1月にバージョンアップし、Ver.3となりました |jjd| qqt| nsu| oaz| vlh| fgt| yvt| nae| lpb| mfe| ctb| szw| rnk| uaz| lom| ble| thk| wvb| wdh| bys| zml| xlg| xvh| lpt| ejl| jez| csn| hnc| rtj| dru| yzj| nwc| jpm| lcz| ikw| guw| bvk| inn| clj| rmy| beu| shc| fso| gia| wsi| oqo| evq| non| zzi| jnj|