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| Lifter bore diameter? https://slantsix.org/forum/viewtopic.php?t=21807 |
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| Author: | Bren67Cuda904 [ Sat Feb 10, 2007 4:54 am ] |
| Post subject: | Lifter bore diameter? |
I am making in a groving tool. Is the bore diameter .900? |
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| Author: | emsvitil [ Sat Feb 10, 2007 5:01 am ] |
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Tappets .9040 to .9045 Clearance in block .0012 to .0025 So the bore would have to be (.9045 + .0012) to (.9040 + .0025) or .9057 to .9065 |
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| Author: | HyperValiant [ Sun Feb 11, 2007 1:11 pm ] |
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I would like to se pics of this tool when your done. HyperValiant |
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| Author: | Bren67Cuda904 [ Mon Feb 12, 2007 2:15 pm ] |
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Groving tool is done. My machinist will grind the final tip shape on the carbide, but it should be close. The tool is made from AL The tip depth is adjusted with an alen set screw and then the other alen set screw keeps the tip from rotating during use. http://www.renaissanceracing.com/images ... gTool1.JPG http://www.renaissanceracing.com/images ... gTool2.JPG http://www.renaissanceracing.com/images ... gTool3.JPG |
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| Author: | Greg Ondayko [ Mon Feb 12, 2007 5:24 pm ] |
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Brennan, Approx. how wide does that tool cut the Grooves in the bore? How deep into the side of the block are you planning to go too? Greg |
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| Author: | Bren67Cuda904 [ Mon Feb 12, 2007 6:42 pm ] |
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Thats a good question. I am going to leave that up to the builder. However the tool in theory could cut a path 7/32 wide and that deep. As you and I know that would be waaaaayy to deep. |
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| Author: | Bren67Cuda904 [ Thu Feb 15, 2007 4:47 pm ] |
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We groved the lifter bores the other day and the tool worked great. I think I am going to let my builder keep it, he really liked it. The grove is about .025 wide and .015 deep. Once the depth was set on the tool, it took about 10 mins to grove all the bores. |
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| Author: | argentina-slantsixer [ Thu Feb 15, 2007 6:13 pm ] |
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Quote: We groved the lifter bores the other day and the tool worked great. I think I am going to let my builder keep it, he really liked it. The grove is about .025 wide and .015 deep. Once the depth was set on the tool, it took about 10 mins to grove all the bores.
this was done by press, hand/mallet or wich way? nice tool, BTW. How did you prevented the tool from turning on its axis and cutting a straight groove? plus, did you grooved only once per lifter? thanks for sharing your experience!
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| Author: | Bren67Cuda904 [ Thu Feb 15, 2007 6:20 pm ] |
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placed tool in the bore with the bit "up hill" (facing the cylinder bores) and drove it through with a hammer. One grove per lifter bore. |
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| Author: | emsvitil [ Thu Feb 15, 2007 7:11 pm ] |
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Quote: placed tool in the bore with the bit "up hill" (facing the cylinder bores) and drove it through with a hammer. One grove per lifter bore.
That doesn't sound right.I think the groove should be on the side farthest from the cylinder bores (downhill side) so that oil is carried over the cam lobe as it rotates across the lifter. |
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| Author: | Doctor Dodge [ Thu Feb 15, 2007 7:34 pm ] |
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When the grooves are put in the "up-hill" side of the lifter bore it creates a deeper pool of oil at the top of the lifters. That oil completly surrounds the top of the lifter and floods the pushrod socket. Once the oil gets down the groove, it run around lower portion of the exposed lifter body and then drips off the "down-hill" lifter edge. The drops land right on the cam's contact face, as it moves into the lifter. I have done the grooviing both ways and like the results of the up-hill groove a bit better. Any added groove gives way more oil to the cam / lifter contact area so any groove helps. (or a looser lifter bore that allows more oil to pass by) DD |
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| Author: | Bren67Cuda904 [ Thu Feb 15, 2007 7:44 pm ] |
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DD What do you think of more than one grove? |
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| Author: | emsvitil [ Thu Feb 15, 2007 7:52 pm ] |
| Post subject: | |
Quote: When the grooves are put in the "up-hill" side of the lifter bore it creates a deeper pool of oil at the top of the lifters. That oil completly surrounds the top of the lifter and floods the pushrod socket.
DD I wouldn't have thought that the groove would have had any significant impact on the pool of oil compared to standoffs..................... |
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| Author: | Doctor Dodge [ Thu Feb 15, 2007 8:06 pm ] |
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The grooves just drain the pools, the more grooves, the faster the drain-off. If to much oil builds-up, it overflows down the hollow stand-off tubes. DD |
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