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 Big Block Titanium valve retainers and a questionJump to page : 1 Now viewing page 1 [50 messages per page] | View previous thread :: View next thread |
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1960fury |
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Expert 5K+ Posts: 7529     Location: northern germany | I changed to 1.6 roller rockers the past year with great success, but in the back of my head I always had the increased weight with more valve lift and some valve seat recession, so I stayed away from full throttle runs so far. Surprisingly there was no valve float at 135 mph with all these factors, increased weight, stock 370K miles valve springs and valve seat recession (reduced spring compression), but I always wanted TI retainers anyway. So I lucked into a very cheap set of Titanium retainers for some other make and engine (don't have the manufacturer or part number) that had surprisingly the same dimensions as OE 60 big block retainers, except for the (smaller) conical part, which was a good thing, as I could machine the compressed height into them, to compensate for the seat recession and to add a bit more stiffness. When I bought them I thought, it can't be a big deal to find a 7° reamer in the once industrial nation Germany. Wrong. It turned out to be impossible. Fortunately I found a way to turn a cheap straight adjustable reamer into a conical adjustable reamer! (First picture) I worked like a charm and when I was halfway thru, I received a note from some outlet I contacted, that I can't machine Titanium with HSS and they offer me a reamer for about $600.... the reamer I modified was $9.50 and worked perfectly.... The question: I noticed that the valve locks for intake an exhaust valves work differently. The exhaust ones circle the valve stem completely, so that there is no direct pressure on the stem and it can rotate freely. The intake ones don't and clamp the valve stem, they also add more spring compression. At first I thought this is an early BB thing only, so I ordered new ones from Rock Auto. Waste of money, same design and on top of that, incorrect angle (more about that in this http://forwardlook.net/forums/forums/thread-view.asp?tid=78762&post... thread!) Why did they design it that way? PS the head picture is from my other 1960 383, I canged the retainers on the car, didn't remove the heads. The retainers work great and remove about 200 Gramms/7+ Ounces(!) of reciprocating mass from the valve train. They weight about 40% of the steel ones and as they sit in the most crucial place in the valve train, this should compensate for the increased weight of the roller rockers. Edited by 1960fury 2023-09-19 10:26 AM (ti-retainers1.jpg) (ti-retainers2.jpg) (ti-retainers3.jpg) (valve locks1.jpg) Attachments ----------------  ti-retainers1.jpg (116KB - 85 downloads) ti-retainers2.jpg (107KB - 89 downloads) ti-retainers3.jpg (125KB - 88 downloads) valve locks1.jpg (207KB - 93 downloads) | ||
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| 1960fury |
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Expert 5K+ Posts: 7529 Location: northern germany | Too bad I can't edit anymore, typo, I meant IT worked like a charm^  Does really nobody know, why the difference in lock-design? Never paid attention to it before. Is this a Mopar only thing? Edited by 1960fury 2023-09-24 10:11 PM | ||
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| 1960fury |
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Expert 5K+ Posts: 7529 Location: northern germany | Aren't they pretty? (ti-retainers4.jpg) Attachments ---------------- ti-retainers4.jpg (192KB - 82 downloads) | ||
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| Shep |
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Expert Posts: 3441   Location: Chestertown, NY ( near Lake George) | |||
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| wizard |
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Board Moderator & Exner Expert 10K+ Posts: 13078 Location: Southern Sweden - Sturkö island | |||
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| 1960fury |
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Expert 5K+ Posts: 7529 Location: northern germany | |||
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