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Strengthening B20 block
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<blockquote data-quote="Zeroed" data-source="post: 2806557" data-attributes="member: 98"><p>The basic necessity for a VTEC B20B to last is to atleast use ARP bolts internally and headstuds. </p><p></p><p>These bolts are capable of much higher tightenning torques than standard Honda's to compensate for the smaller bolt sizes, compared to VTEC engines (8mm vs 12mm if I am not mistaken). Prevents bolt-stretching at high rpms causing bearings to loosen and possibly spin, one primary reason for B20B VTEC builds to fail.</p><p></p><p>Another strengthenning process is posting, which is commonly referred to as block guarding as well. But this method is different, you send it to the machine shops to insert small posts between the sleeves and block housing to prevent the sleeves from stretching and deforming at high rpms. </p><p>Dont use drop-in block guards as those generally causes heatsoak and may lead to block failure as well. </p><p></p><p></p><p>While changing all the internals provide a much more reliable and high potential 2L build, this method is much cheaper, and people have been running such builds at 8000rpm revs daily with it lasting for more than 2 years, and still running strong. </p><p></p><p>Make sure you have the B20B block with the correct sized oil pump as well (Same as B18C). There is a version with a smaller oil pump which is not sufficient for VTEC application. Forgot more details about this.</p><p></p><p>There, what I believe most people in malaysia dont know about B20B builds. Done research for my build a while now...</p><p>I believe you plan to drag/track the car on a personal enjoyment basis?</p><p></p><p>If youre doing it on a professional level then youre already asking the wrong questions haha.</p></blockquote><p></p>
[QUOTE="Zeroed, post: 2806557, member: 98"] The basic necessity for a VTEC B20B to last is to atleast use ARP bolts internally and headstuds. These bolts are capable of much higher tightenning torques than standard Honda's to compensate for the smaller bolt sizes, compared to VTEC engines (8mm vs 12mm if I am not mistaken). Prevents bolt-stretching at high rpms causing bearings to loosen and possibly spin, one primary reason for B20B VTEC builds to fail. Another strengthenning process is posting, which is commonly referred to as block guarding as well. But this method is different, you send it to the machine shops to insert small posts between the sleeves and block housing to prevent the sleeves from stretching and deforming at high rpms. Dont use drop-in block guards as those generally causes heatsoak and may lead to block failure as well. While changing all the internals provide a much more reliable and high potential 2L build, this method is much cheaper, and people have been running such builds at 8000rpm revs daily with it lasting for more than 2 years, and still running strong. Make sure you have the B20B block with the correct sized oil pump as well (Same as B18C). There is a version with a smaller oil pump which is not sufficient for VTEC application. Forgot more details about this. There, what I believe most people in malaysia dont know about B20B builds. Done research for my build a while now... I believe you plan to drag/track the car on a personal enjoyment basis? If youre doing it on a professional level then youre already asking the wrong questions haha. [/QUOTE]
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Strengthening B20 block