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The Terminator
Engine/Tuning
2 step and timing chain tensioners???
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<blockquote data-quote="jrgoffin" data-source="post: 15887635" data-attributes="member: 4360"><p>Not.</p><p></p><p>The purpose of grinding the teeth off the ratchet is so it won't "hyper-extend" and put excess pressure on the chain, which is turn puts excess pressure on the #1 cam journal(s), which will then cause premature wear. This is what SHM (and John Mihovetz) discovered was happening with the two-step during high RPM launches for the drag-racers. The ratchet works one way: once it extends, the teeth keep it from retracting. After you grind the teeth off, it only extends with oil pressure but then "collapses" at essentially the same length as the spacer would take up behind the piston.</p><p></p><p>[ATTACH=full]1483041[/ATTACH] </p><p></p><p>Adding the spacer and leaving in a modified ratchet is useless. The ratchet will just sit there and do nothing since it cannot extend due to the teeth missing (other than moving due to oil pressure behind the piston), and the piston will not collapse since the spacer is behind it. Anyone trying to sell tensioners with a modified ratchet <em>and</em> a spacer is just unnecessarily draining wallets.</p><p></p><p>[ATTACH=full]1483042[/ATTACH]</p></blockquote><p></p>
[QUOTE="jrgoffin, post: 15887635, member: 4360"] Not. The purpose of grinding the teeth off the ratchet is so it won't "hyper-extend" and put excess pressure on the chain, which is turn puts excess pressure on the #1 cam journal(s), which will then cause premature wear. This is what SHM (and John Mihovetz) discovered was happening with the two-step during high RPM launches for the drag-racers. The ratchet works one way: once it extends, the teeth keep it from retracting. After you grind the teeth off, it only extends with oil pressure but then "collapses" at essentially the same length as the spacer would take up behind the piston. [ATTACH=full]1483041[/ATTACH] Adding the spacer and leaving in a modified ratchet is useless. The ratchet will just sit there and do nothing since it cannot extend due to the teeth missing (other than moving due to oil pressure behind the piston), and the piston will not collapse since the spacer is behind it. Anyone trying to sell tensioners with a modified ratchet [I]and[/I] a spacer is just unnecessarily draining wallets. [ATTACH=full]1483042[/ATTACH] [/QUOTE]
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2 step and timing chain tensioners???
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